11
System pro
M
Test the main
circuit without
signalization
manual
Test control circuit
without service
interruption
press „T“ for test
After a short circuit or overload,
acknowledge the has-tripped signal.
push press the red signal contact switching
lever upwards
The variety of functions makes the combined signal contact/auxiliary contact S2-S/H an excellent choice.
Additional retrofit devices
Signal contact/auxiliary contact S2-S/H
The signal contact and the auxiliary contact both have a potential-free changeover contact.
The contacts have a trip-free mechanism.
Minimum switching capacity 0.1 VA at 24 V.
Application examples
●
If the MCB is switched off, e.g. due to an insulation test (deliberate interference), only the auxiliary contact trips,
but not the signal contact.
●
The signal contact switch can be switched to test the control circuit (OFF by test button T
and ON with the operating lever), without disconnecting the main circuit.
●
The signal contact switch can be reset, in order to e. g. acknowledge an acoustic signal switched via the device,
without causing the MCB to trip.
SK 0333 B 91
SK 0334 B 91
SK 0335 B 91
SK 0332 B 91
signal contact
operating lever
test button
SK 0150 Z 91
SK 0151 Z 91
position of terminals
SK 0148 Z 91
circuit
SK 0149 Z 91
Supplementary devices
for S 280 UC
miniature circuit-breakers
function
SK 0147 Z 91
dimensions
SK 0017 Z 94
Signal
contact
auxiliary
contact
