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A-71
Indication contacts
Contacts installed in the device
Changeover contacts are used to remote circuit breaker status information and can
thus be used for indications, electrical locking, relaying, etc.
They comply with the IEC 60947-5 international recommendation.
Functions
OF (ON/OFF) - indicates the position of the main circuit breaker contacts
b
SD (trip indication) - indicates that the circuit breaker has tripped due to:
b
an overload
v
a short-circuit
v
an earth-leakage fault
v
operation of a voltage release
v
operation of the "push to trip" button
v
Returns to de-energised state when the circuit breaker is reset.
b
SDE (fault indication) - indicates that the circuit breaker has tripped due to:
an overload
v
a short-circuit
v
an earth-leakage fault.
v
Returns to de-energised state when the circuit breaker is reset.
Installation
OF, SD and SDE functions - a single type of contact provides all these different
b
indication functions, depending on the position where it is inserted in the device.
The contacts clip into slots behind the front cover of the circuit breaker.
Electrical characteristics of the OF/SD/SDE auxiliary contacts
All the auxiliary contacts opposite are also available
in "low-level" versions capable of switching very low
loads (e.g. for the control of PLCs or electronic
circuits).
054549-18
OF, SD and SDE changeover contacts.
Contacts
Standard
Low level
Rated thermal current (A)
6
5
Minimum load
100 mA at 24 V
1 mA at 4 V
Utilisation cat. (IEC 60947-5-1)
AC12 AC15 DC12 DC14 AC12 AC15 DC12 DC14
Operational
24 V
6
6
6
1
5
3
5
1
current (A)
48 V
6
6
2.5 0.2 5
3
2.5 0.2
110 V
6
5
0.6 0.05 5
2.5 0.6 0.05
220/240 V
6
4
-
-
5
2
-
-
250 V
-
-
0.3 0.03 5
-
0.3 0.03
380/440 V
6
2
-
-
5
1.5 -
-
480 V
6
1.5 -
-
5
1
-
-
660/690 V
6
0.1 -
-
-
-
-
-