GE L30 Instruction Manual page 311

5 SETTINGS
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
I
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
GE Multilin
H1a
H1b
H1c 52a
Trip coil
R
Bypass
resistor
Figure 5–86: TRIP CIRCUIT EXAMPLE 2
L30 Line Current Differential System
5.7 CONTROL ELEMENTS
Values for resistor "R"
Power supply Resistance
24 V DC 1000 Ω
DC–
30 V DC 5000 Ω
48 V DC 10000 Ω
DC+
110 V DC 25000 Ω
125 V DC 25000 Ω
250 V DC 50000 Ω
setting is
BLOCK
5
Power
2 W
2 W
2 W
5 W
5 W
5 W
827074A3.CDR
5-175