© Siemens AG 2008. All rights reserved.
3AK7
3AK7 vacuum circuit-breaker
OPERATING INSTRUCTIONS
Order no.: 9229 0055 176 0A
Ordering location: IC LMV LP PO P C41
AG 09.2013 en
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For your safety
Signal terms and defini-
tions Hazards are classified in accordan ce with ISO 3864-2 using the following keywords:
• DANGER, WARNING or CAUTION, where there is a risk of personal injury
• NOTE for material damage.
Hazards are classified and indicated in the operating instructions and on the vacuum
circuit-breaker as follows:
Qualified personnel are, for the purposes of this manual or the warning notices on the vacuum circuit-
breaker, persons who are familiar with the transport, storage, placement, assembly,
commissioning, operation and maintenance of the product and have the qualifica-
tions corresponding to their activity, such as:
• training and authorization to switch on, switch off, clear, earth and tag circuits
and equipment in accordance with established safety practices.
• training in the proper care and use of protective equipment in accordance with
established safety practices;
• training in providing first aid.
Product liability
DANGER
signal word used to indicate an imminently hazardous situation.
If the danger is not avoided, it will result in death or serious injury.
WARNING
signal word used to indicate a potentially hazardous situation.
If the hazardous situation is not avoided, it could r esult in death o r seriou s inju ry.
CAUTION
signal word used to indicate a potentially hazardous situation.
If the dangerous situation is not avoided, it could result in minor or moderate
injury.
Note
indicates a potentially damaging situation.
If the damaging situation is not avoided, the product or something in its vicinity
may sustain damage.
Note
Product liability claims are upheld only if the replacement of the purchased spare
parts is performed by personnel that have been trained and certified by Sie-
mens.
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Table of contents
For your safety ................................................................................................................................................... 2
Transport, storage and packing .... ............. ............. ............. ............. ............. ............. ............ ............. ....... 5
Transport ......... ................ ............. ................. ................ ................ ................ ...................................................... 5
Unpacking ........................................................................................................................................................... 6
Reusing the transport unit ................................................................................................................................... 9
Storage ............................................................................................................................................................... 9
General information ....................................................................................................................................... 11
Range of application ............................................................................................................................ ... ...... .... 11
Standards ............... ................ ............. ................ ................ ................ ................ ............................. .... ... ... ... .... 12
Design approval as per the X-ray ordinance ........................................................................................... ... ... .... 12
Scope of delivery ....................................................................................................................... ... ... ... . ... ... ....... 12
Description ........................................................................................................................................................ 13
Design ........................................................................................................................................ ... ... .... ... ... ... .... 13
Locking devices ......................................................................................................................................... ... .... 24
Rating plate ............... ........................................................................................................... ... ... ... ... .... ............. 26
Technical data ...................................................................................................................................... ... ... ... .... 26
Ambient conditions ........................................................................................................................... .... ...... ... .... 27
Installation altitudes ......................................................................................................................... .... ... ... ... .... 27
Switching times ................................................................................................................................ .... ............. 28
Circuit diagrams ......................................................................................................................... ... ... ....... ... ... .... 29
Mounting .............. ............................. ............................. ............................. ........................................................ 35
Attachment in the switching cubicle ................................................................................................. .... ............. 35
Earthing ............... ................... ................ ................... .................... ................... ................................ .... ... ... ....... 37
Electrical connection of the prime conduc tor ...... ... ........................................................................................... 39
Operation ............................................................................................................................................................ 41
Commissioning ....................................................................................................................................... ... ... .... 41
First closing operation ............................................................................................................................. ... ... .... 42
Closing ....................................................................................................................................... ... ... .... ............. 43
Opening ........................................................................................................................................... .... ... ... ... .... 43
Maintenance ...................................................................................................................................................... 45
Maintenance and servicing ..................................................................................................................... .......... 45
Interrupter service life ............... ........................................................................................................... ............. 48
Accessories and spare parts ............................................................................................................ .... ... ... ... .... 48
Manufacturer's product liability ............ ... ... ....................................................................................... .... ... ... ... .... 49
Disposal ........................................................................................................................................... .... ... ... ....... 49
Service ....................................................................................................................................... ... ... .... ............. 49
Index of keywords .......................................................................................................................................... 51
Legend for all pages ...................................................................................................................................... 53
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Transport, storage and packing
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Transport, storage and packing
Transport
Transport weight Refer to the delivery slip for the weight of the transport unit.
Place the transport unit on a level, n on-slip a nd pressur e-resi stant surf ace for inter -
mediate storage.
Transport vacuum circuit-breaker in the original transport unit up to the installation
site or storage location.
Transporting with crane or forklift
WARNING
Heavy transport weight
Transport unit may fall and sling gear may break.
Use lifting gear, transporting and sling gear suited to the requirements and load-
carrying capacity. Observe transport symbols.
Note
Observe stacking height
For transport, no more than three constructionally identical transport units may be
stacked on top of each other.
Observe the loads specified on the transport unit.
Note
Secure load
For transport, secure the load in such a way that the transport unit is not at risk.
Fig. 1 Transporting the pallet with carton (I)
Transport, storage and packing
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Transporting with packing Transport the transport unit to the installation site or storage location
• with a forklift or
• with sling gear suspended from a crane
- at an angle of twist of about 60° or
- with a spreader bar.
After receipt of delivery:
Checking the transport
unit • Check transport unit for damage.
• Major damage must be documented photographically.
• Ensure that any damage to the transport unit is confirmed by the transport com-
pany.
Unpacking
Working equipment Required tools:
- Knife/scissors
- Lifting equipment with lifting gear
- Pliers or lever.
CAUTION
Risk of injury from sharp edges!
Fasteners may break, leaving sharp edges.
Always use a suitable tool to lever ou t fast en e rs.
Note
Do not cut open or dama ge the carton, since it is designed to be re used and
because of the belt straps located underneath.
Belt straps could be severed on the pallet floor when cutting open the carton.
The vacuum circuit-b reaker is attache d to the pa llet with belt straps. It is not pos-
sible to transport the vacuum circuit-breaker on the pallet without using belt straps
(see Fig. 4).
Fig. 2 Removing the ca rto n
Transport, storage and packing
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Opening the transport unit • Place the transport unit on a level, non-slip and pressure-resistant surface.
• Remove lifting gear or transport means.
• Remov e pla st ic wrap .
• Lever out fasteners from the carton and lift off carton.
• Remove the cover and store safely in the film for later assembly.
• Remove film from the vacuum circuit-breaker.
• In the case of overseas packaging, push the lower film onto the pallet floor.
• Check that the delivery is complete.
• Check vacuum circuit-breaker for damage.
• If the vacuum circuit-breaker is damaged, ship it back in the transport unit (see
“Reusing the transport unit” on page 9).
Transporting with pallet,
without carton The vacuum circu it-breaker can be transported with the pallet, without the carton.
• Thread carrying straps under the pallet or
• transport with fork lift.
Note
Do not use the vacuum circuit-breaker if parts are broken, i.e. if you find cracks,
flaking, bent metal parts, damaged plug-in contacts, tears or bare cables.
Send it back in its original transport unit (see “Reusing the transport unit”,
page 9).
Note
Carrying straps may scrape along the vacuum circuit-breaker and damage it.
If necessary, co ver carrying straps with edge protection.
Fig. 3 Removing the cover and film Fig. 4 Transporting with pallet possible
Transport, storage and packing
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Transporting without pallet • Remove all tensioning be lts and bits of fastening wood.
• Remove accessory pack, if applicable, and store safely in the packaging for
later attachment.
• Hang sling gear into the crane eyes.
• Transport to installation site or leave suspended from crane for further work
steps.
Fig. 5 Removing the tensioning belts Fig. 6 Lifting the vacuum circuit-breaker
Note
Keep cover and accessory pack ready for the installation.
Transport, storage and packing
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Reusing the transport unit
Reusing the transport unit To transport the vacuum circu it-breaker again, the pallet with carton and most of the
components can be reused.
Do not reuse severed tensioning belts or plastic wrap.
Pack the vacuum circuit-breaker in reverse order:
• Attach the vacuum circuit-breaker safely to the pallet using the appropriate
tools.
• Cover with film and seal with adhesive tape.
• Attach accessories pack.
• Attach carton securely to the pallet floor.
• Before returning to the factory, ask the responsible Siemens sales representa-
tive for a returned goods number (see also “Service” on page 49).
• When returning a vacuum circuit-breaker, always indicate the type and serial
number (see “Rating plate” on page 26).
Storage
Note
Store the vacuum circuit-breaker in the following condition:
• OPEN switching position
• Closing spring discharged
Note
Risk of corrosion damage if stored improperly!
If the storage conditions listed below are met, the vacuum circuit-breaker can be
stored for up to a year in its transport unit.
If the storage conditions are not met, the vacuum circuit-brea ker cannot be stored
in the transport unit any longer than six months.
If storage of longer than one year is planned, unpack the vacuum circuit-breaker
from the transport unit. Further storage may necessitate fresh corrosion protec-
tion, and it must be ensured that the vacuum circuit-breaker cannot be da maged.
Storage room Transport unit Storage
time Temperature
range Comments Number of
units per
stack
Enclosed, dry, well
ventilated and as
free from dust as
possible, with a rela-
tive humidity of less
than 60 %.
unopened max.
6months -40°C to +55°C — max. 4
unopened max.
1 year -5 °C to +40 °C — max. 4
open over 1 year -5 °C to +40 °C if necessary,
with new corro-
sion protectio n —
Transport, storage and packing
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General information
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General information
Smooth and safe operation of this device requires proper transport and storage, and
professional installation and assembly, as well as careful operation and mainte-
nance.
The basic version and all listed configurations of the vacuum circuit-breakers are
type-tested devices as per IEC and version 17.5 kV as per IEEE.
Range of application
3AK7 vacuum circuit-breake rs are 3-pole interior circ uit-breakers for a rated voltage
range of 7.2 kV - 17.5 kV.
Under normal operatin g cond itions, the vacuum cir cuit-breaker is mainte nance-fr ee
up to 10 000 operating cycles.
Intended use 3AK7 vacuum circuit-breakers ar e suitable for switching any typ e of alternating cur-
rent circuits under normal operating conditions, such as:
• Three-phase motors for reversing, turning and direct operation
• Transformers
• Capacitors
• Generators (only 17.5 kV)
• Resistor consumers
Suitable for high frequency of operation and unlimited on-time.
3AK7 vacuum circuit-breakers operate in continuous, periodic and short-term oper-
ation.
WARNING
Dangerous electrical charges and mechanical movements
When operating electrical devices, certain parts will always be live and
mechanical parts may move very quickly, even when remotely contr olled.
If the warnings are not observed, serio us injury or damage to material may be the
result.
Only personnel with the relevant qualifications may work on or in the vicinity of
this device. These personnel m ust be familiar with all the warnings and servicing
measures specified in these operating instructions.
Note
In the event of subsequent attach ments or integrations, e.g. locking parts in con-
nection with switchgears, ensure that
• fast-moving parts are not additionally loaded with mass or force, and
• additional parts have sufficient clearance, especially from moving and live
parts.
If vacuum circuit-breakers are to be equipped with additional functions by the cus-
tomer, we recommend consulting the factory, since tried and tested solutions are
frequently available (see also “Additional equipment” on page 16).
General information
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Standards
The 3AK7 vacuum circuit-breakers comply with the regulations:
• IEC 62271-100,
• IEC 62271-1,
• IEC 60265-1 and
• IEEE C37.013 (only 17.5 kV).
All 3AK7 vacuum circuit-breakers comply with the specifications for C2-, E2- and
M2-class circuit-breakers in accordance with IEC 62271-100.
Design approval as per the X-ray ordinance
The interrupters installed in the vacuum circuit-breakers are of a design approved
under the X-ray ordinance (RöV) of the Federal Republic of Germany. They meet
the requirements of RöV of 8 January 1987 (BGbl. I, page 114) § 8 and Annex II
No. 5 up to the level of the rated volta ge stipu lat ed according to DIN VDE/IEC.
Scope of delivery
Delivery includes:
• Vacuum circuit-breaker 3AK7
• Hand crank for circuit-breaker 3AX 1530-2B (optional)
• Operating ins tru ct ion s
• Circuit-breaker-specific circuit diagrams
Description
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Description
Design
Vacuum circuit-breaker The 3AK7 vacuum circuit-breaker consists of
• the mechanism box (60.),
• the 3 pole assemblies (19.) with interrupters (30.).
Pole assembly The pole assembly (19.) of the 3AK7 vacuum circuit-breaker consists of
• the upper interrupter support (20.) with the upper terminal (27.),
• the interrupter (30.),
• the lower interrupter support (40.) with the lower terminal (29.),
• and the pole shell (23.).
Each of the 3 pole assemb lies is supported by the pole shel l (23.), which is scre wed
to the pole plate
(15.).
Contact system in the interrupters
A slight change in the contact stroke that occurs over the entire service life of the
interrupter has no effect on the function of the vacuum circuit-breaker. There is no
need for a status indicator for the contact system.
Fig. 7 Operating mechanism side Fig. 8 Pole side
15. Pole plate 40. Lower interrupter support
19. Pole assembly, complete 48. Insulating operating rod
20. Upper interrupter support 51. Rating plate
23. Pole shell 60. Mechanism box
26. Earth terminal 60.3 Transportation eyes
27. Upper terminal 68.7 Low-voltage interface X0
29. Lower terminal
30. Interrupter
Description
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Mechanism box The mechanism box (60.) contains all the electrical and mechanical components
required to switch the vacuum circuit-breaker on or off. Insulating operating rods
(48.) transfer the switching movement to the pole assemblies.
The mechanism box is closed with a removable cover (60.1).
There are openings in the cover (60.1) for the operating and indicator elements.
Functions The CLOSE pushbutton (53.) is used to close the vacuum circuit-breaker. The motor
(50.4) immediately charges the closing spring (62.). If the supply voltage for the
motor fails, the closing spring can be charged with a hand crank (50.). There is an
opening (50.1) for this in the cover, behind which you will find the hand crank cou-
pling (50.5) of the gear unit (50.2).
Indicators The charged state of the springs is indicated via the spring state indicator (55.). The
position indicator (59.) shows the CLOSED or OPEN state. The operating cycle
counter (5 8. ) ind ica te s t he n um b er o f op erating cycles. An operating cycle consists
of one closing and one opening. The rating plate (51.) is attached to the pol e plate
(15.).
Fig. 9 Operating and indicator elements
50.1 Opening for hand crank 58. Operating cycle counter
53. CLOSE pushbutton 59. Position indicator CLOSED-OPEN
54. OPEN pushbutton 60.1 Cover
55. Spring state indicator a) Tightening torque Md = 10 Nm
Description
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Fig. 10 Opened mechanism box
50.2 Gear unit 60. Mechanism box
50.4 Motor M1 61. Dashpot
50.4.1 Position switch 62. Closing spring
50.5 Hand crank coupling 63. Circuit-breaker shaft
53.1 Closing solenoid Y9 64. Opening spring
54.1 Shunt release Y1 66. Closing damper
54.2 Shunt release Y2 68. Auxiliary switch S1
54.3 Transformer-operated release Y4 68.1 Operating rod (for auxiliary switch S1)
54.4 Undervoltage release Y7 68.7 Low-voltage interface X0
54.5 Transformer-operated release (0.1 Ws) Y6 69. Contactor relay K1
55. Spring state indicator 70. Earth terminal
58. Operating cycle counter 71. Heater (condensation water protection)
59. Position indicator CLOSED-OPEN
Description
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Equipment
Basic equipment The basic equipment of the 3AK7 vacuum circuit-breaker contains:
Additional equipment Every 3AK7 vacuum circuit-breaker can al so be fitted with the following equipment:
In addition to the standard shunt release (Y1), the vacuum circuit-breaker can be
equipped with a maximum of two releases of the type 3AX11.
For the permitted po ssible combinations of the additional equipment as well as spe-
cial designs, refer to catalogue HG11, or contact the responsible sales representa-
tive.
Motor (M1)
Contactor relay (electrical anti-pumping device) (K1)
Closing solenoid (Y9)
Shunt release (Y1)
Auxiliary switch (optional) (S1)
•6NO + 6NC
•12NO + 12NC
Position switch for signal “Closing spring charged” (S41, S42)
Circuit-breaker tripping signal, cut-out switch (S6, S7)
Low-voltage interface (optional) (X0)
• Plug-connector with sleeve housing 64-pole
• Plug-connector with sleeve housing 24-pole
• Terminal strip (X1)
Operating cycle counter
Mechanical anti-pumping device
Mechanical manual closing and opening
Shunt release1) 3AX1101
1) Subsequent installation possible
(Y2, Y3)
Transformer-operated release 3AX11021) (Y4, Y5)
Transformer-operated release 3AX1104 (0.1 Ws)1) (Y6)
Undervoltage release 3AX11031) (Y7)
Heater (condensation water protection)1) (R01)
Electrical manual closin g2)
2) No subsequent installation possible
Mechanical locking device1)
Description
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Motor M1
*) The operator's supply voltage may deviate from the rated supply voltage of the
vacuum circuit-breaker by -15 % to +10 %.
**) Built-in automatic circuit-breaker with C characteristic
Fig. 12 Recommendation for motor protection device
Contactor relay K1
After the supply voltage is applied and if the closing
spring is discharged, the motor sta rts immediately and is
automatically deactivated internally after charging has
taken place.
Power consum p tion, ma x im u m:
• fordirect voltage of about 750 W
• for alternating voltage 1400 W.
In the short charging time, the motor temporarily oper-
ates in the overload range. See Fig. 12 for the rated cur-
rent for the required motor sh or t-c ircu i t pr ot ec tio n.
Note: The motor protection devices are not included in
the delivery of the vacuum circuit-breaker and must be
ordered separately.
Fig. 11 Motor (50. 4)
Rated supply voltage U*) VDC
24 DC
48 DC
60 DC
110 AC 50/60 Hz
110 DC
220 AC 50/60 Hz
230
Recommended rated current of the protective
device I**)A16 10 6 4 6 2 3
If simultaneous CLOSED and OPEN commands are
continuously applied to the vacuum circuit-breaker, it
returns to the open position after being closed.
Via the function of the contactor relay K1, the vacuum
circuit-breaker pauses there until the CLOSED com-
mand is given again.
This prevents continuous closing and opening (pump-
ing).
Fig. 13 Contactor relay (69.)
Description
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Closing solenoid (Y9) 3AY1510
1st shunt release (Y1) 3AY1510
The closing solenoid Y9 unlatches the charged closing
spring and switches the vacuum circuit-breaker on elec-
trically. It is available for DC or AC voltage.
The closing solenoid Y9 is not designed for continuous
operation and is autom atically deactivated within the cir -
cuit-breaker.
The operator's supply voltage may deviate from the
rated supply voltage of the vacuum circuit-breaker by -
15 % to 10 %.
The closing solenoid Y9 can be operated using AC or DC
voltage and is protected against overvoltage.
Power consumption is about 140 W / VA
Fig. 14 Closing solenoid (53.1)
In the case of the 1st shunt release Y1, the electrically
fed tripping pulse is passed to the “OPEN” latch by
means of a directly acting magnet ar mature, thus switch-
ing off the vacuum circuit-breaker.
The 1st shunt release Y1 is not designed for continuous
operation and is automatically deactivated within the
circuit-breaker.
The operator's supply voltage may deviate from the
rated supply voltage of the vacuum circuit-breaker by
-30 % to +10 % in the event of DC voltage and by -15 %
to +10 % in the event of AC voltage.
The 1st shunt release Y1 can be operated using AC or
DC voltage and is protected against overvoltage.
Power consumption is about 140 W / VA
Fig. 15 1st shunt release (54.1)
Description
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Auxiliary switch S1
Breaking capacity
Fig. 17 Breaking capacity of the auxiliary switch 3SV92
Three versions of the auxiliary switch S1 are available for
delivery: with 6 or 12 NO/NC contacts each.
Rated insulation voltage: 250 V AC/DC
Insulation group: C as per VDE 0110
Continuous current: 10 A
Closing capacity: 50 A
Fig. 16 Auxiliary switch (68.)
AC 40 to 60 Hz DC
Operating voltage Operating current Operating voltage Operating current
U (V) I (A) U (V) I (A)
Ohmic load Inductive load
(T = 20 ms)
Up to 230 10
24 10 10
48 10 9
60 9 7
110 5 4
220 2.5 2
Description
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Position switch
Circuit-breaker tripping signal, cut-out swit ch (S6, S7)
S21, S22 Position switches (switch off the motor after
charging)
S3 Position switch (opens when closing spring
is charged)
S41, S42 Position switches (report charging state)
Fig. 18 Position switch (50.4.1)
The position switch S6 makes contact briefly when the
vacuum circuit-breaker is opened by means of an elec-
trical release.
This contacting can be used for a signal.
In the event of intentional mechanical opening, the cut-
out switch S7 interrupts th e con ta cting.
Fig. 19 Circuit-breaker tripping signal
Description
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Low-voltage interface X0, 64-pole
For connection of the control line, the standa rd version o f the vacuum circuit-break-
ers is equipped with a 64-pole low-voltage interface X0 (68.7).
The 64-pole plug (68.7.1) for the external terminal, is suitable for crimp termination
of control lines with a nominal cross-section of 1.5 mm2.
Terminal strip (optional) Instead of the 64-pole plug (68.7.1), a terminal strip (68.7.2) can be ordered as inter-
face to the terminal at the customer's site.. Assignment of the terminals is done
according to the circuit diagram supplied.
Fig. 20 Low-voltage interface X0 Fig. 21 Terminal strip (optional)
Description
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A further shunt release, transformer-operated release, undervoltage release or
instantaneous release can be installed as a 2nd release.
2nd shunt release (Y2) 3AX1101
Transformer-operated releases (Y4, Y5) 3AX1102, (Y6) 3AX1104
The second shunt release Y2 is installed whenever more
than one shunt release is needed.
In this version, the electrical “open” command is passed
by means of a magnet armature to the “OPEN” latch by
release of an energy storage mechanism, thus opening
the vacuum circuit-brea ke r. This o pening so leno id is not
designed for continuo us operation. Any necessary va ris-
tors and rectifiers are integrated in the release.
Power consumption is about 60 W / VA
Fig. 22 2nd shunt release (54.2)
The transformer-operated r eleases Y4, Y5 or Y6 consist
of an energy storage mechanism, an unlatching fixture
and an electromagnetic system. If the tripping current is
exceeded (90 % of the transformer-operated release's
rated current), the energy storage mechanism is
unlatched, thus initiating opening of the vacuum circuit-
breaker.
For use of the transformer-operated release, matching
transformers are also nee ded for matching, in addition to
the main current transformers.
Power consum ption for 0.5 A and 1 A ≤ 6 VA at ≤90 %
of the transformer-operated release's rated current and
with open armatu re .
Fig. 23 Transformer-operated releases (54.3)
Description
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Undervoltage release (Y7) 3AX1103
The undervoltage release Y7 has an electromagnet system that has voltage perma-
nently applied to it when the vacuum circuit-breaker is in the closed state. If the volt-
age drops below a certain value, the undervoltage release Y7 is unlatched, thus
initiating opening of the vacuum circuit- breaker via the energy storage mechanism.
Random tripping of the undervoltage release Y7 is generally performed by an NC
contact in the tripping circuit, but ca n also be done with the aid of an NO contact by
short-circuiting the solenoid coil. If this latter method is used, the solenoid coil's
short-circuit current is limited by the built-in resistor.
The undervoltage release Y7 can also be connected to voltage transformers.
The undervoltage release Y7 automatically trips the vacuum circuit-breaker if the
rated supply voltage drops to an inadmissible value. Any necessary varistors and
rectifiers are integrated in the release.
Power consumption ≤6.5 W or ≤7.5 VA
Note
The undervoltage release Y7 must only be operated with the supplied series
resistor R1.
Note
For switching operations (mechanical or electrical), the undervoltage release
3AX1103… must be connected to control voltage, as otherwise closing is not pos-
sible.
Fig. 24 Undervoltage release (54.4) Fig. 25 Typical circuit for connection of the undervolt-
age release Y7
A
B
R1 resistor
S1 auxiliary switch
Y7 undervoltage release
Description
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Heater (condensation water protection)
Electrical manual closing/electr. locking device
In the basic version, the vacuum circuit-breaker with on-site co nnection is closed by
direct mechanical unlatching of the closing spring. Instead of this mechanical man-
ual closing, “electrical manual closing” is also available.
In this version, the closing circuit of the vacuum circuit-breaker module is electrically
actuated by a sensing device and must also be enabled via a command element
from the control room.
With on-site closing, this permits taking into account system-related interlocking and
allows you to prevent unintentional closing by the control room, for example. This
allows for interlocking the vacuum circuit-breaker module, for example, via the aux-
iliary contact of a disconnector.
Vacuum circuit-breakers with electrical manual closing cannot be switched mechan-
ically.
Locking devices
To lock vacuum circuit-breakers as a function of the switching position, the spring
charge mechanisms of the vacuum circuit-breaker can be equipped with a locking
device. This is also the case for vacuum circuit-breakers on switch gear trucks, in
withdrawable sections or with disconnectors.
Conditions The vacuum circuit-breaker must only be switched on in operating or disconnected
position. The operating or disconnected position is the position of the vacuum circuit-
breaker on the switchgear truck or withdrawable section in the switchgear. At the
same time, the vacuum circuit-breaker may be moved on the switchgear truck or
withdrawable section only when it is open.
Positions of the vacuum circuit-breaker in the switchgear
Disconnected position The isolating distance between the vacuum circuit-breaker contacts and the switch-
gear counter-contacts is 100 % attained.
Operating position The circuit-breaker is inserted fully into the switchgear and the vacuum circuit-
breaker contacts overlap completely with the switchgear counter-contacts.
The heater limits co ndensation and corrosion of the vac-
uum circuit-breaker.
To this end, the heater has to be connected to the supply
voltage (see circuit diagram included with the delivery).
The heater's surface temperature is at the most 180 °C.
Power consumption 50 W
Fig. 26 Heater (71.)
Description
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Mechanical locking device (optional with spring drive mechanism)
A sensing and actuation component (b) on the system side detects the operating
position (CLOSED/OPEN) of the vacuum circuit-breaker.
CLOSED switching posi-
tion If the vacuum circuit -breaker is c los ed, actuation of the system's sensing and actu-
ation component is prevented. A mechanical system in the switchgear truck or with-
drawable section reliab ly blocks movements of the circuit-bre aker on the switchgear
truck or withdrawable section.
OPEN switching position If the vacuum circuit-breaker is open, the sensing and actuation component (b) on
the system side actuates, via the stroke (a), the vacuum circuit -breaker's mechani-
cal locking device and reliably blocks closing of the vacuum circuit-breaker.
Fig. 27 Mechanical locking device
The installation dimensions (c + d) fo r the se nsing and actuation co mponent (b) are
in the dimension drawing.
X CLOSED switching position a Stroke (min. 10 mm, max. 30 mm)
Y OPEN switching position b Interrogation or actuation component (min. actuation force 70 N)
Z View from below c + d see dimension drawing
Description
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Rating plate
Technical data
Fig. 29 Technical data
Dimensions and weights
The dimensions of the vacuum circuit-breaker can be taken from the relevant dimen-
sion drawing. If required, these are available from your sales representative.
The weight is given on the rating plate of the vacuum circuit-breaker (see Fig. 28) or
can be taken from the relevant dimension drawing.
Fig. 28 Example – vacuum circuit-breaker rating plate 3AK7
a Manufacturer
b Type designation
c Works serial number
d Rated voltage Ur
e Rated frequency fr
f Rated short-circuit breaking current Isc
g Rated power frequency withstand
voltage Ud
h Rated lightning impulse withstand
voltage Up
i Quality control seal
k Year of manufacture
m Rated operating current Ir
n Rated short-circuit duration tk
o Mass m
p Rated operating sequence
r Classification to standard
Rated voltage* UrkV 7.2 12 17.5 17.5**
Rated operating current IrA 1250, 2000, 2500, 3150, 4000***
Rated lightning impulse withstand voltage (peak
value) UpkV 60 75 95 95
Rated power frequency withstand voltage (effective
value) UdkV 20 28 (42)1) 38 (42)1) 38 (42)1)
Rated short-circuit breaking currentIsc kA 50 40
Distance between pole centres mm 210, 2802) 210
Rated operating sequence A, B C
A O - 3 min - CO - 3 min - CO
B O - 0.3 s - CO - 15 s - CO; on request
C CO - 30 min - CO
* In the event of a r ated frequency fr of 50/60 Hz
** Only for generator application
*** 4000 “A” only with additional cooling
1) On request
2) Selection option, see 14th position in the catalogue
Description
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Ambient conditions
Installation altitudes
Insulating capacity The insulating capacity of insulation in air decreases with rising altitude due to the
lower air density. In conformity with IEC 62 271-102, the rated lightning impulse volt-
age values given in Fig. 29 are valid up to an installation altitude of 1,000 m above
sea level.
At altitudes of 1,000 m and higher, the insulation level must be corrected as shown
in Fig. 31:
3AK7 vacuum circuit-brea kers ar e suitable for u se in the
following climate classes in accordance with IEC 60721,
Part 3-3: Class
• Climatic ambient conditions: 3K41),
3K62),
3Z2,
3Z5
• Biological ambient conditions: 3B1
• Mechanical ambient conditions: 3M2
• Chemically active substances: 3C23)
• Mechanically active substances: 3S24)
1) Peak value of the 24-hour means: +35 °C
2) Without ice formation and wind-driven precipitation
3) Without occurrence of salt fog and simultaneous condensation
4) Restriction: clean insulating parts
5) Average value, measured over 24 hours
6) Average value, measured over 1 month
Fig. 30 Ambient conditions
U U0 Ka
U Rated withstand voltage U under standard reference
atmosphere
U0Required rated withstand voltage for the installation
location
KaAltitude correction factor
Ka = em (H – 1000)/8150
Calculating the altitude correction factor Ka:
H = Installation altitude in metres
m = 1 for AC voltage, lightning impulse voltage (between
phases, phase-to-earth, applied longitudinally)
Example
For a required rated withstand voltage o f 75 kV at an alti-
tude of 2,500 m, an insulation level of at least 90 kV
under standard reference atmosphere conditions is
required:
90 kV 75 kV e1 (2500 – 1000)/8150
75 kV 1.2
Fig. 31 Altitude correction factor Ka
Description
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Switching times
Fig. 32 Switc hing tim es
Closing time = period between starting (command) of the closing movement and
the moment of contact touch in all poles.
Opening time = period between starting (c ommand) of the openin g movement and
opening of the last pole.
Arcing time = period from the start of the first arc to extinction of the arcs in all poles.
Break-time = period between starting (command) of the opening movement and
extinction of the arc in the last pole to become extinct (= opening time + arcing time) .
Close/Open time = period in an OPEN/CLOSED cycle between the moment of con-
tact touch in the first pole during closing and the time when contact touch has been
cancelled in all poles during subsequent opening.
Dead-time = period from the en d of the current flow in all poles up to the star t of cur-
rent flow in the first pole.
Closing time < 75 ms
Opening time
1st shunt release (Y1) < 60 ms
2nd and 3rd release (Y2, Y4, Y6, Y7) < 55 ms
Arcing time < 15 ms
Break time
1st shunt release (Y1) < 75 ms
2nd and 3rd release (Y2, Y4, Y6, Y7) < 70 ms
Dead time 300 ms
Close/Open time
1st shunt release (Y1) < 90 ms
2nd and 3rd release (Y2, Y4, Y6, Y7) < 70 ms
Minimum command duration
Closing solenoid (Y9) 45 ms
1st shunt release (Y1) 40 ms
2nd and 3rd release (Y2, Y4, Y6, Y7) 20 ms
Shortest pulse time for breake r trip p ing sign al
1st shunt release (Y1) > 15 ms
2nd and 3rd release (Y2, Y4, Y6, Y7) > 10 ms
Charging time if actuated electrically (M1) < 15 s
Synchronous operation error between the poles ≤ 2 ms
Description
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Circuit diagrams
The circuit diagrams show the available components with their wiring options.
Fig. 33 to Fig. 39 show some non-binding examples of vacuum circuit-breakers.
The circuit diagrams for the vacuu m circuit-breaker are compiled depending on your
order.
Mechanical manual closing and electrical closing
Fig. 33 Example – circuit diagram connection via low-voltage interface, 64-pole,
basic version
Electrical manual closing and electrical closing
Fig. 34 Example – circuit diagram with connection via low-voltage interface 64-
pole.
This legend is also valid for the following circuit diagrams.
-Y1 -Y2 -Y4
-Y4 -Y5
-Y6 -Y7
-Y7
“OPEN” release
-Y1 -Y2 -Y4
-Y4 -Y5
-Y6 -Y7
-Y7
“OPEN” release
extended auxiliary switch
HA Manual opening S3 Position switch (opens when closing spring is charged)
HE Manual closing S41, S42 Position switches (signal charging status)
K1 Contactor relay (anti-pumping device) S6, S7 Position switches (for circuit-breaker tripping signal)
M1 Motor X0 Low-voltage interface
P Energy storage mechanism Y1 1st shunt release
R1 Resistor Y2 2nd shunt release
S1 Auxiliary switch Y4, Y5, Y6 Transformer-operated release
S10, S11 Position switch (mechanical anti-pumping device) Y7 Undervoltage release
S12 Position switch (prevents electrical closing if there is a
mechanical locking device) Y9 Closing solenoid
S21, S22 Position switches (switch off the motor after charging) V6 Integrated rectifiers for motor
Description
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1) Integrated varistor
2) Integrated rectifier for AC/DC ≥100 V
3) Line H07V-K1x2.5sw (as per EN 50525-2-31) when motors are used with DC 24 V/48 V and 60 V
4) Only if a mechanical closing lock is ordered at the same time
a) Motor winding for DC
b) Motor winding with rectifier for AC
c) Closing
d) Closing with anti-pumping device
Fig. 35 Sample circuit diagram 64-pole (part 1) of the vacuum circuit-breaker
a) b) c) d)
Description
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1) Integrated varistor
2) Integrated rectifier for AC/DC ≥100 V
a) 1st shunt release with 64-pole plug-connector
b) 1st shunt release with 24-pole plug-connector
c) 2nd shunt release with 64-pole plug-connector
d) 2nd shunt release with 24-pole plug-connector
Fig. 36 Sample circuit diagram (part 2) of the vacuum circuit-breaker
a) b) c) d)
Description
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1) Integrated varistor
2) Integrated rectifier for AC/DC ≥100 V
3) Attention: connect L+ for direct current (DC)
a) Undervoltage release
b) Low-energy trip-coil
c) 1st transformer-operated release
d) Signal: spring state with 64-pole plug-connector
e) Signal: spring state with 24-pole plug-connector
f) Breaker tripping signal for 64-pole plug-connector
Fig. 37 Sample circuit diagram (part 3) of the vacuum circuit-breaker
a) b) c) d) e) f)
Description
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The unassigned auxiliary switch terminals are wired up (as shown) with the 64-pole
plug bottom.
Fig. 38 Example – auxiliary switch terminals
Fig. 39 Sample switching operation for connection of the undervoltage release Y7
Normal auxiliary switch Extended auxiliary switch
No wiring required if
a) 2nd shunt release Y2 available
b) Undervoltage release Y7 available
a) b)
System wiring Tripping via NO con-
tact
Tripping via
NC contact
System wiring
Circuit-breaker wiring
Description
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Blank page
Mounting
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Mounting
Attachment in the switching cubicle
The vacuum circuit-breaker is delivered in the OPEN switching position. Before
installing the vacuum circuit-breaker, remove the transport aids (see “Unpacking”
on page 6).
Check data Before installing the vacuum circuit-breaker in a switching cubicle, check the details
on the rating plate (see “Rating plate” on page 26) in order to avoid confusion.
DANGER
High-voltage – deadly danger
Touching live parts causes an electric shock.
• Do not touch live parts!
• When per for m ing wor k on th e switc hg e ar, de-energise it and ea rt h it.
• The work described in the following sections must only be performed when
the switchgear has been de-energised:
- Take safety measures to prevent reclosing.
- Observe industrial safety regulations.
- Ensure that the vacuum circuit-breaker is inst alled and commissioned on ly
by qualified personnel who are familiar with the operating instructions and
observe the warning notices.
WARNING
Risk of injury due to wrong transport means!
Using wrong transport means may cause the vacuum circuit-breaker to fall and
injure persons.
• Observe weight.
• Use means of transport suited to the requirements and load-carrying capac-
ity.
• The vacuum circuit-breaker must not fall over.
• Sharp edges may cause injury.
Note
For preliminary work, the vacuum circuit-breaker must be
• secured against falling over,
• placed on to a su itable supp or t or
• suspended from a crane to prepare for installation.
Mounting
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Mounting position The 3AK7 vacuum circuit-breaker can only be installed vertically (to the vacuum
interrupter), as an indoor withdrawable section and as an indoor fixed installation.
Mounting the cover
The cover (60.1) of the mechanism box (60.) for transport and storage is found in a
separate accessories pack.
• Remove film from the cover.
• Take out four screws and washers from the accessories pack.
• Screw two screws with washers into the lower holes of the mechanism box until
the cover can be fitted.
• Position the cover on the lower screws using the long holes.
• Place cover flush onto the mechanism box.
• Screw two screw s with wa she r s into the up p er hole s of th e me ch a nism bo x.
• Fasten the screws with a tightening torque of 10 Nm.
Fig. 40 Mounting position
Fig. 41 Preparation Fig. 42 Mounting the cover
Mounting
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Mounting the vacuum circuit-breaker
There are a total of 11 fixing holes on the pole plate (15.) and on the mechanism box
(60.) for the various types of installation.
Use M12 screws – strength class 8.8 – for fastening. The binding dimension draw-
ings are relevant.
The framework must be made to suit the operating conditions and have sufficient
load bearing capacity and stability.
* bores for M12 screws
Earthing
Connecting to earth Connect the vacuum circuit-breaker on the earth terminal (70.) to the high-voltage
protective earth as specified (DIN EN 50341).
• Fully unscrew hexagon socket head screw M12 with washer on the earth termi-
nal (70.).
• T ig hten r ing terminal for the earth wire with th e M12 hexagon screw and washe r
on the earth term i na l (70.) with 40 Nm.
Fig. 43 Fastening options Fig. 44 View Z
Note
If the 3AK7 vacuum circuit-breaker is installed into an earthed me tal frame and is
connected permanently and electrically conductive, no separate earthing is
required.
Place serrated washers under the screw heads when fastening the vacuum cir-
cuit-breaker in this case.
Mounting
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Connect low-voltage Connect the low-voltage connectin g cables in the customer's switch cabinet in such
a way that safe operation as per supplied circuit diagram is guaranteed.
Removing the transport securing device from the undervoltage release
Undervoltage release (Y7)
present? The vacuum circu it-br eaker with a n unde rvol tage re lease (Y7) 3AX1103 is supplied
with a transport securing device.
• Remove the two top screws (60.2) from the cover (60.1).
• Undo the two bottom scre ws (60.2) o n the cover (60.1) until the cover (60.1) can
be taken off.
• Slightly tilt the cover (60.1) of the mechanism box and lift off.
• Shift the locking screw of the striker from position A to B (see reference note in
mechanism box [60.] of the vacuum circuit-breaker).
• Replace the cover (60.1) in the reverse order
• and fasten the screws (60.2) with a tightening torque of 10 Nm.
Fig. 45 Earth terminal Fig. 46 Connecting earth wire
Fig. 47 Removing the cover Fig. 48 Removing the transport securing device
A
B
Mounting
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Electrical connection of the prime conductor
The busbars can be purchased from the Siemens Service Center.
Busbar connection
Adjust the busbars in such a way tha t, before fastening, they lie flat easily and fit the
holes on the contact areas of the vacuum circuit-breaker.
Preparing contact areas Use a steel brush to carefully brush the contact areas (cross-wise) of the busbars
until they are metallically bright and wipe off any residue using a clean cloth.
After cleaning, very lightly grease the bright contact areas with acid-free Vaseline
(e. g. Shell-Vaseline 8420) and screw together immediately.
DANGER
High-voltage – deadly danger
Test the vacuum circuit-breaker in the switchbay with high-voltage applied only
after faultless functioning has been ascertained (see “Commissioning” on
page 41).
Note
Grease the busbars with contact grease prior to mounting.
Fig. 49 Cleaning the contact areas Fig. 50 Cleaning the contact areas of the busbars
Note
Clean silver spray-plated and copper spray-plated contact areas with a cloth, do
not brush.
Different connection materials (AI/CU) must not be cleaned with the same clean-
ing tools.
Silver-plated parts must not be bolted to aluminium bars/rails.
Mounting
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Corresponding to the rated current strength, use M12 screws and nuts – strength
class 8.8 – for connection of the busbars and use the appropriate spring elements
and washers.
When tightening the screws, hold the nuts against tightening torque of 70 Nm with
a suitable screwdriver or socket wrench.
Screw-in depths in the upper and lower terminals
See dimension drawings.
Fig. 51 Mounting busbars
Note
For vacuum circuit-brea ke rs wi th connecting bar s, it is recommended to use the
stainless steel screws or non-magnetis able screws included in the accessory
pack.
Operation
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Operation
Commissioning
Before commissioning, check the following points to ensure that the 3AK7 vacuum
circuit-breaker is functioning faultlessly:
DANGER
High voltage – deadly danger!
Touching live parts causes an electric shock.
• Do not touch live parts!
• Ensure that the vacuum circuit-breaker is operated only by qualified person-
nel who are familiar with the operating instructions and observe the warning
notices.
• Check through all of the items on the checklist and ensure correct functioning
before commissioning.
Checklist Notes
Does the information on the rating plate (see page 26) match the order
data?
Ensure correct operating voltage.
If necessary, clean the vacuum circuit-breaker (details on this in section
“Cleaning” on page 45).
Check that screw connections are tightened securely.
Check terminal strip plug-connection for tightne ss.
Check functioning of the auxiliary switches.
If necessary, check and adjust customer's devices.
If there is an undervolt age release (Y7) 3AX1103: has the locking screw of
the striker been shifted from position A to B (see “Removin g the transport
securing device from the undervoltage release” on page 38)?
Test switching without supply voltage
Charge the closing spring (62.) with the hand crank (50.) (see Fig. 52),
then actuate the CLOSE pushbutton (53.) and, once closing has been
performed, actuate OPEN pushbutton (54.).
Test switching with supply voltage
To perform test switching with the motor, switch on the supply voltage.
The motor starts up immediately and charges the closing spring (62.).
Check the indicator for charge state of the closing spring (mechanically
and electrically).
Electrically check through auxiliary switch S1 (68.) and position switch
(50.4.1) in both end positions – operate the 3AK7 vacuum circuit-breaker
to do so.
Check functioning of the closing sole noid Y9 (53.1) and all available shunt
releases by operating them electrically.
Operation
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First closing operation
If all functions have been checked an d ar e ok, switch o n high- volta ge while obse rv-
ing all of the safety regulations and operative requirements.
Charging the closing spring
If the supply voltage is applied, the closing spring (62.) is automatically charged by
the motor (50. 4) .
Hand crank If the supply voltage fails, the closing spring (62.) can be char ged with a hand cran k
(50.).
1. For this, fit th e hand crank (50.) onto the han d crank coupling (50.5) throug h the
opening (50.1) with the adapter pushed forward (50.6).
2. Turn clockwise until the spring state indicator (55.) changes over:
WARNING
Do not commission the vacuum circuit-breaker if there are malfunctions.
If the malfunctions or the damage cannot be remedied, conta ct a sales represen-
tative or Siemens Service and, if necessary, send back the vacuum circuit-
breaker.
WARNING
Risk of injury if hand cranks other than the original hand crank are used.
When the supply voltage is present, the motor immediately recharges the spring
after a closing operation. If the hand crank does not have a slip coupling, the hand
crank will also rotate.
To avoid injuries caused by the motor starting suddenly, the vacuum circuit-
breaker must be charged only using the original hand crank.
Discharged Charged
Fig. 52 Charging the closing spring with the hand
crank Fig. 53 Operating elements and spring state indicator
Operation
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The adapter (50.6) of the hand crank (50.) is designed in such a way that the hand
crank becomes un co up le d wh en the motor supply voltage returns.
Closing
Provided there is no lock-out due to a mechanical locking device, send the closing
command via the CLOSE pushbu tton (53.) or the corres ponding command element
until the vacuum circuit-breaker is closed and shows and signals the CLOSED
switching position.
Change of the position indicator (59.):
After switching on and possibly releasing the CLOSE pushbutton (53. ), the closing
spring (62.) is immediately automatically charged by the motor and the indicator
“Closing spring charged” (55.) becomes visible.
Change of the spring state indicator (55.):
Opening
The opening spring (64) is charged during the closing operation.
To open, send the opening command via the OPEN pushbutton (54.) or the corre-
sponding command element until the vacuum circuit-breaker is open and shows and
signals the OPEN switching position.
Change of the posit i on indic at or (59.) after electrical opening:
The spring state indicator (55.) does not change.
Discharging the closing spring
To discharge the closing spring:
• the supply voltage must be deactivated
• the vacuum circuit-breaker must be closed manually (see “Closing” on page 43)
and then
• opened manually (see “Opening” on page 43).
OPEN CLOSED
Charged Discharged Charged
Note
If an undervoltage release 3AX1103… is fitted, it must be connected to the control
voltage for switching operations (mechanical or electrical), as otherwise closing
is not possible.
CLOSED OPEN
Operation
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Operating tool
Fig. 54 Operating tool
50. 3AX1530-2B hand crank (optional) for charging the closing spring by hand
Maintenance
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Maintenance
Maintenance and servicing
Maintenance
The 3AK7 vacuum circuit-breaker is maintenance-free under normal operating con-
ditions. We do, however, recommend you carry out regular visual inspections. The
maximum permitted mechanical operating cycle number is 10 000.
Cleaning
The insulating parts must be clean if their insulating capacity is to be guaranteed.
Rub insulating parts with a moist cloth.
As a cleaning agent, use only warm water with a mild, liquid household detergent
added and leave to dry.
Joints and bearings that cannot be disassembled must not be washed out with a
detergent prior to work.
DANGER
High voltage – danger to life!
Touching live parts is fatal or causes serious physical injury.
Before beginning maintenance work, note the five safety rules for high-voltage
equipment specified in EN 50110-1, namely:
• Isolate from the power supply*)
• Secure against reclosing
• Verify safe isolation from the power supply
• Earth and short-circuit
• Cover or cordon off neighbouring live parts
*) On the vacuum circuit-breaker, actuate the OPEN, CLOSE and OPEN pushbut-
tons manually one after the o ther. This ensures that the vacuum circuit-breaker is
open and the closing spring is discharged.
Note
The vacuum circuit-breaker should be taken out of the switch cabinet or switch-
gear for servicing.
Maintenance
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Special operating conditions
If the vacuum circuit-breaker is operated under unfavourable conditions indoors
(heavy and frequent condensation, dusty air, etc.), we recommend cleaning the
insulating parts and possibly the outer parts of the circuit-breaker at shorter inter-
vals.
For this, only the following agents may be used on the individual functional parts of
the circuit breake r :
Lubricant:
Lubricants are available from the responsible Siemens representative:
Bearings, sliding surfaces: Isoflex Topas L 32
Bearings and bearings of the auxiliary switch S1
that are inaccessible in terms of greasing: Shell Tellus oil 32
Order no.
180 g Isoflex Topas L 32 3AX11 33-3H
1 kg Shell Tellus oil 32 (special oil) 3AX11 33-2D
1 kg Isoflex Topas L 32 3AX11 33-3E
Maintenance
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Fig. 55 Bear ing s and slid ing sur faces of the operating mechanism
Isoflex Topas L 32 Shell Tellus Oil 32
a Crankpin for sensing device actuation b Bearing for deflection lever
c Curve contour f Auxiliary switch
d Close-latch j Circuit-breaker shaft bearing
e Deflection of auxiliary switch p Opening spring bearing
g Opening spring guide r Spring eyelet on closing spring
h Deflection of auxiliary switch
kOPEN-latch
l Curve for OPEN-latch
m End stop
s Contact area of instantaneous release
Maintenance
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Interrupter service life
If switching operations occur frequently under overload or short circuit, the service
life of the interrupters may be reached prematurely.
Replace the interrupters after reaching the maximum permitted operating cycle
number of 10,000 mechanical or electrical load setting changes (up to the rated cur-
rent).
When ordering inter rupters, al wa ys state the circuit- breaker type and seri al numb er
(see“Rating plate” on page 26).
Accessories and spare parts
Replacing spare parts To ensure that the device operates reliably, spare parts may be replaced only by
trained and certified personnel.
Fig. 56 Acce ss or ies av aila b le for orde r
Always specify the vacuum circuit -breaker's type and serial no. (see “Rating plate”
on page 26) when ordering spare parts.
CAUTION
Risk of injury!
The vacuum circuit-breaker should be taken out of the switch cabinet or switch-
gear for servicing.
Separate vacuum circuit-breakers from the control feed voltage or switch it off
and disconnect the low-voltage plug or clip connection.
Accessory/spare part Order no. Comments
Operating instructions 9229 0055 100
Hand crank 3AX1530-2B
Lubricant see “Special operating condi-
tions” on page 46
Vaseline (contact grease)
e.g. Atlantic white, Atlantic Mineralölwerk GmbH Pasty consistency, flame point
210 °C, low acid
Maintenance
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Manufacturer's product liability
The manufacturer's product liability shall be excluded if at least one of the following
criteria applies:
• Original Siemens spare parts are not used.
• Fitters carrying out replacements have not been trained and certified by Sie-
mens.
• Parts have been incorrectly fitted or adjusted.
• Adjustments are not made in accordance with Siemens specifications.
• After installation and adjustment, no final test is performed with a tester
approved by Siemens including documentation of the test results.
To keep documentation complete, it is important that measu rement results are sub-
mitted to the responsible sales represen ta tive.
Disposal
The materials o f the vacuum circuit-breaker sho uld be recycled. Disposal of the vac-
uum circuit-breaker with minimum environmen tal impact is possible on the basis of
existing legal regulations.
Metal The circuit bre aker's metal componen ts can be recycled as mixed scrap, althoug h it
is more environmentally sustainable to dismantle the unit as th or oughly as p ossi ble
into sorted scrap and residual mixed scrap.
Electronics Electronic scrap must be disposed of in accordance with applicable regulations.
Materials The vacuum circuit-breaker consists of the following materials:
• Steel (partly phosphatised, galvanised and yellow chromated)
• Copper (partly silver-plated)
• Plastics (epoxy resin, polyamide, polyester, polycarbonate, ABS-PC mixture;
partly glass fibre reinforced)
• Rubber materials
•Ceramics
•Lubricant
Packaging If the packaging is no longer needed, it can be fully recycled.
Hazardous substances When delivered by Siemens, the product does not contain any hazardous sub-
stances within the scope of the Hazardous Substances Ordnance applicable to the
territory of the Federal Republic of Germany. For operation outside the Federal
Republic of Germany, the applicable local laws and regulations must be complied
with.
Further information Contact your Siemens Service Center if you require further information.
Service
For details of contacts for service work, consult Siemens IC LMV SE Services at
• Telephone: +49 180/5247000
• Fax: +49 180/5242471 or
• on the Internet at the Web address: www.siemens.com/energy-support
• by e-mail: support.energy@siemens.com
• or any local sales representative.
Maintenance
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Blank page
Index of keywords
9229 0055 176 0A 51
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Index of keywords
A
Accessories available for order ............................. 48
Altitude correction factor ....................................... 27
Ambient conditions ................................................ 27
Auxiliary switch ............................................. 15– 16
B
Basic equipment ................................................... 16
Bearings and sliding surfaces ............................... 47
Busbars ................................................................. 40
C
Circuit-breaker shaft .............................................. 15
Circuit-breaker tripping signal ....................... 16, 20
Climate classes ..................................................... 27
Closing damper ..................................................... 15
Closing solenoid .................................... 15– 16, 18
Closing spring ............................................... 15, 24
Contact position indicator CLOSED-OPEN .......... 15
Contact stroke ....................................................... 13
Contact system ..................................................... 13
Contactor relay .............................................. 15– 16
Cover .................................................................... 14
Cut-out switch ............................................... 16, 20
D
Dashpot ................................................................. 15
Disconnected position ................................... 24– 25
Distance between pole centres ............................. 26
E
Earth terminal ................................................ 15, 37
Electrical manual closing .............................. 16, 24
G
Gear unit ............................................................... 15
H
Hand crank .................................................... 42, 44
Hand crank coupling ............................................. 15
Heater (condensation water protection) 15– 16, 24
High-voltage protective earth ................................ 37
I
Installation altitudes .............................................. 27
Insulating capacity ................................................ 27
Interrupter ............................................................. 13
Interrupter support ................................................ 13
Interrupter, contact system ................................... 13
Interrupter, service life .......................................... 48
Interrupter, vacuum check .................................... 48
L
Locking devices .................................................... 24
Low-voltage interface .................................... 15– 16
M
Mechanical anti-pumping device ........................... 16
Mechanical locking device ............................ 16, 25
Mechanical manual closing ........................... 16, 24
Mechanism box .................... .... ... ... .............. 13, 15
Motor ............................................................ 15– 17
Mounting position ........ .......................................... 36
O
Opening spring ........ .... ... ....................................... 15
Operating cycle counter ........................ .... ... . 15– 16
Operating position .......................... ... ... .... ... ... ....... 24
Operating rod ........ ... .... ... ... ... .... ... .......................... 15
P
Plug-connector with sleeve housing ............... ... .... 16
Pole assembly ............. ... ... .................................... 13
Pole plate ................. .... .......................................... 13
Position switch ...... ... .... ... .............................. 15, 20
R
Range of application .......................... ... .... ... ... ....... 11
Rated frequency ................ ... .... ... .......................... 26
Rated lightning impulse withstand voltage ............ 26
Rated operating current ..................... ... ................. 26
Rated operating sequence .................................... 26
Rated power frequency withstand voltage ............. 26
Rated short-circuit breaking current ...................... 26
Rated short-circuit duration ............... ... .... ... ... ... .... 26
Rated voltage ....................... .... ... ... ... ... ................. 26
Rating plate ....... ... ... .... ... ... .................................... 26
S
Shunt release ............................... 15– 16, 18, 22
Spring state indicator ................ ... ... ... ... .... ... . 14– 15
Standards .......................... ... .... ... ... ... ... ................. 12
T
Terminal strip ............... ... ... ... .... .................... 16, 21
Transformer-operated release .............. 15– 16, 22
Transformer-operated release (0.1 Ws) ................ 15
U
Undervoltage release ........................... 15– 16, 23
Index of keywords
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15. Pole plate
16.1 Upper post insulator
16.2 Lower post insulator
19. Pole assembly, complete
20. Upper interrupter support
27. Upper term ina l
29. Lower term ina l
30. Interrupter
40. Lower interrupter support
48. Insulating operating rod
50. Hand crank
50.1 Opening for hand crank
50.2 Gear unit
50.4 Motor M1
50.4.1 Position switch
50.5 Hand crank coupling
50.6 Hand crank adapter
51. Rating plate
51.1 Opening for rating plate
53. CLOSE pushbutton
53.1 Closing solenoid Y9
54. OPEN pushbutton
54.1 Shunt release Y1
54.2 Shunt release Y2
54.3 Transformer-operated release Y4
54.4 Undervoltage release Y7
54.5 Transformer-operated release (0.1 Ws) Y6
55. Spring state indicator
55.1 Opening for spring state indicator
58. Operating cycle counter
58.1 Opening for operating cycle counter
59. Contact position indicator CLOSED-OPEN
59.1 Opening for position indicator CLOSED-
OPEN
60. Mechanism box
60.1 Cover
61. Dashpot
62. Closing spring
63. Circuit-breaker shaft
64. Opening spring
66. Closing damper
68. Auxiliary switch S1 (6NO+6NC)
68.0.1 Extended auxiliary switch S1 (12NO +
12NC)
68.1 Operating rod (for auxiliary switch S1)
68.7 Low-voltage interface X0
68.7.1 Plug
68.7.2 Terminal strip
69. Contactor relay K1
70. Earth terminal
71. Heater R01 (condensation water protection)
72. Spring charge release
72.1 Lever of the spring charge release
90. Mechanical locking device
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Published by
Siemens AG
Infrastructure & Cities Sector
Low and Medium Voltage Division
Medium Voltage & Systems
Schaltwerk Berlin
Nonnendammallee 104
13629 Berlin
