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Current Transducer LAS 50-TP
For the electronic measurement of currents : DC, AC, pulsed, mixed,
with a galvanic isolation between the primary circuit (high power)
and the secondary circuit (electronic circuit).
Electrical data
IPN Primary nominal r.m.s. current 50 A
IPPrimary current, measuring range 0 .. ± 150 A
VOUT Analog output voltage @ IPV REF ± (0.625·IP/IPN)V
IP = 0 V REF ± 0.025 V
R L Output load resistance ≥ 2 kΩ
ROUT Output internal resistance < 20 Ω
V REF Internal reference voltage 2.5 ± 0.025 V
V REF load resistance ≥ 1 MΩ
V REF internal resistance 200 Ω
V REF external voltage range 2.0 .. 2.8 V
C L Max. output capacitive load 1nF
VCSupply voltage (± 5 %) 5V
ICCurrent consumption @ VC = 5 V typ 18 mA
Accuracy - Dynamic performance data
XAccuracy 1) @ IPN , TA = 25°C < ± 1 %
εLLinearity error 0 .. IPN 2) < 0.7 %
Typ Max
TCVOUT Thermal drift of VOUT @ IP = 0 - 40°C.. + 85°C 80 120 ppm/K
TCVOUT / VREF Thermal drift of VOUT / VREF @ IP = 0 - 40°C.. + 85°C 50 80 ppm/K
TCεGThermal drift of the gain - 10°C.. + 85°C 150 300 ppm/K
- 40°C.. - 10°C 400 700 ppm/K
VOM Residual voltage @ IP = 0, after an overload of 2 x IPN DC ± 5 mV
tra Reaction time @ 10 % of IPN < 200 ns
trResponse time @ 90 % of IPN < 500 ns
di/dt di/dt accurately followed > 100 A/µs
Output noise without external filter < 10 mVpp
fFrequency bandwidth (- 1 dB) DC .. 100 kHz
General data
TAAmbient operating temperature - 40 .. + 85 °C
TSAmbient storage temperature - 40 .. + 100 °C
mMass 20 g
Standards EN 50178 : 1997
All Data are given with a RL = 10 kΩ
Notes :1) Excluding electrical, magnetic offsets and linearity
2) Including magnetic offset.
IPN = 50 A
Features
•Current transducer using
Eta-technology
•Unipolar voltage supply
•Insulated plastic case recognized
according to UL 94-V0
•Compact design for PCB mounting
•Extended measuring range.
Advantages
•Excellent accuracy
•Very good linearity
•Very low temperature drift
•Optimized response time
•Wide frequency bandwidth
•No insertion losses
•High immunity to external
interference
•Current overload capability.
Applications
•AC variable speed drives and servo
motor drives
•Static converters for DC motor drives
•Battery supplied applications
•Uninterruptible Power Supplies (UPS)
•Switched Mode Power Supplies (SMPS)
•Power supplies for welding
applications.
Application domain
•Industrial.
Copyright protected.
16069
LEM www.lem.com
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
060504/14
Current Transducer LAS 50-TP
Isolation characteristics
VdR.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn 5kV
VwImpulse withstand voltage 1.2/50 µs >8 kV
VeR.m.s. voltage for partial discharge extinction @ 10pC >2 kV
Min
dCp Creepage distance 3) 10.70 mm
dCl Clearance distance 3) 10.70 mm
CTI Comparative Tracking Index (Group III a)175
Application examples
According to EN 50178 and IEC 61010-1 standards and following conditions :
•Over voltage category OV 3
•Pollution degree PD2
•Non-uniform field
Note : 3) On PCB with soldering pattern UTEC93-703.
Safety
This transducer must be used in electric/electronic equipment with respect to
applicable standards and safety requirements in accordance with the following
manufacturer's operating instructions.
Caution, risk of electrical shock
When operating the transducer, certain parts of the module can carry hazardous
voltage (eg. primary busbar, power supply).
Ignoring this warning can lead to injury and/or cause serious damage.
This transducer is a built-in device, whose conducting parts must be inaccessible
after installation.
A protective housing or additional shield could be used.
Main supply must be able to be disconnected.
EN 50178 IEC 61010-1
dCp, dCI Rated isolation voltage Nominal voltage
Single isolation 1000 V 1000 V
Reinforced isolation 500 V 500 V
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Front view
[mΩ]
Dimensions LAS 50-TP (in mm. 1 mm = 0.0394 inch)
Output Voltage - Primary CurrentMechanical characteristics
•General tolerance ± 0.2 mm
•Fastening & connection of primary 6 pins 1.4 x 1 mm
Recommended PCB hole 2 mm
•Fastening & connection of secondary 4 pins 0.7 x 0.6 mm
Recommended PCB hole 1.2 mm
Remarks
•VOUT is positive when IP flows from terminals "IN" to
terminals "OUT".
•Temperature of the primary conductor should not exceed
100°C.
•This is a standard model. For different versions
please contact us.
Bottom view
Left view
Connection
Number of
primary turns Primary current Nominal output
voltage Primary
resistance Primary
insertion
inductance
Nominal Maximal
IPN [A] IP [A] VOUT [V] RPLP [µH]
150 150 VREF ± 0.625 0.12 0.008
- IPmax - IPN 0 IPN IPmax
5
4.375
3.125
2.5 1.875
0.625 IP [ A ]
VOUT [ V ]
