GE C30 Instruction Manual page 212

5.6 CONTROL ELEMENTS
EXAMPLE 2: BREAKER TRIP CIRCUIT INTEGRITY MONITORING
If it is required to monitor the trip circuit continuously, independent of the breaker position (open or closed), a method to
maintain the monitoring current flow through the trip circuit when the breaker is open must be provided (as shown in the fig-
ure below). This can be achieved by connecting a suitable resistor (see figure below) across the auxiliary contact in the trip
circuit. In this case, it is not required to supervise the monitoring circuit with the breaker position – the
selected to "Off". In this case, the settings are as follows (EnerVista UR Setup example shown).
UR-series device
with form-A contacts
5
V
I = current monitor
V = voltage monitor
The wiring connection for two examples above is applicable to both form-A contacts with voltage monitoring and
solid-state contact with voltage monitoring.
NOTE
5-92
H1a
I
H1b
H1c 52a
R
Bypass
resistor
Figure 5–37: TRIP CIRCUIT EXAMPLE 2
C30 Controller System
Values for resistor "R"
Power supply
24 V DC
DC–
30 V DC
48 V DC
DC+
110 V DC
Trip coil
125 V DC
250 V DC
5 SETTINGS
setting is
BLOCK
Resistance Power
1000 Ω 2 W
5000 Ω 2 W
10000 Ω 2 W
25000 Ω 5 W
25000 Ω 5 W
50000 Ω 5 W
827074A3.CDR
GE Multilin