Control- and safety isolating- resp. isolating transformer
ST 250/69/23
Advantages
Very good switch-on behaviour thanks to reduced starting currents
High performance for the volume thanks to compact design
Primary side ±5 % tappings for voltage adjustment
Very good corrosion protection and low noise thanks to BLOCKIMPEX
vacuum impregnation
Contact protected screw connection terminals complying with UVV BGV A3
Simple mounting thanks to robust metal footplate with oval slots
Applications
As a control transformer for the electrical isolation of the input and output
sides.The construction of the transformer to supply control systems according
to VDE 0113 is designed.
As an isolating transformer for the safe electrical isolation of the input and
output sides. The transformer may be used to set up protective separation as a
protective measure in accordance with VDE 0100.
As a safety isolating transformer for the safe electrical isolation of the input
and output sides. The transformer is suitable for creating SELV and PELV
circuits because of the limit on the output voltage.
Standards |"Z
Isolating transformer
to: VDE 0570 Part 2-4, DIN EN 61558-2-4, EN 61558-2-4, IEC 61558-2-4
Control transformer
to: VDE 0570 Teil 2-2, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-2
Approvals Z
Control- and safety isolating- resp. isolating transformer
ST 250/69/23
Type ST 250/69/23
Input
Rated input voltage 690 Vac
Tappings Input ±5 %
Rated frequency 50 - 60 Hz
Output
Rated output voltage 230 Vac
Rated power VDE (DB cos phi=1) 250 VA
Rated power VDE (KB cos phi=0.5) 555 VA
No-load voltage (app. x factor) 1.08
Efficiency 90 %
Standards
Classification Control- and isolating transformer
Approvals
Approvals -
Environment
Ambient temperature max. 40 °C
Cooling method by self-cooling
Safety and protection
Type open type
Class of Insulation System B
Protection index IP 00
Safety class (prepared) I
Short circuit strength non-short-circuit proof
PRI Fusing recommendation by circuit breaker with tripping characteristic type
20 x Irated related to set)
Setting range 0.40 - 0.63 A
Setting value 0.43 A
Order numbers
Order Number ST 250/69/23
Type ST 250/69/23
Terminal and mounting
Terminals Screw-type terminals, PE 6.3 x 0.8
Fixing method Base plate
Fixing screws M5
Measures and weights
Weight 3.50 kg
84.0
96.0 103.0
86.5
105.0
61.0
+
-
30
Subjects to change.
