GE T60 Instruction Manual page 251

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 Relay - Form-A
I = Current Monitor
V = Voltage Monitor
827074A2.VSD
GE Multilin
Courtesy of NationalSwitchgear.com
DC+
H1a
I
H1c
V
H1b
By-pass
52a
R
Resistor
Trip
Coil
DC–
Figure 5–79: TRIP CIRCUIT EXAMPLE 2
T60 Transformer Management Relay
5.6 CONTROL ELEMENTS
Table 5–22: VALUES OF RESISTOR 'R'
POWER RESISTANCE
SUPPLY (V DC) (OHMS)
24 1000
30 5000
48 10000
110 25000
125 25000
250 50000
setting is
BLOCK
5
POWER
(WATTS)
2
2
2
5
5
5
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