Specifications

7SR242 Duobias Applications Guide
©2010 Siemens Protection Devices Limited Chapter 7 Page 48 of 56
5.4.2 Close Circuit Supervision Connections
R
BI
+ve -ve
+
BO 1 BO n
Remote
Alarm
BO
R
CLOSE
COIL
52a
52b
-
Circuit
Breaker
Resistor:
30V dc Nominal: R = 3K9
48V dc Nominal: R = 5K6
110V dc Nominal: R = 15K0
CLOSE CCT n FAIL
Figure 5-7 Close Circuit Supervision Scheme
Close circuit supervision with the circuit breaker Open or Closed.