
GE Multilin
N60 Network Stability and Synchrophasor Measurement System
5-147
5 SETTINGS
5.6 CONTROL ELEMENTS
5
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
BLOCK
setting is
selected to “Off”. In this case, the settings are as follows (EnerVista UR Setup example shown).
Figure 5–68: TRIP CIRCUIT EXAMPLE 2
Trip
Coil
52a
V
I
H1a
H1c
H1b
UR Relay - Form-A
V = Voltage Monitor
I = Current Monitor
DC+
DC–
827074A2.VSD
R
By-pass
Resistor
Table 5–11: VALUES OF RESISTOR ‘R’
POWER
SUPPLY (V DC)
RESISTANCE
(OHMS)
POWER
(WATTS)
24
1000
2
30
5000
2
48
10000
2
110
25000
5
125
25000
5
250
50000
5
Содержание N60 UR Series
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Страница 436: ...B 78 N60 Network Stability and Synchrophasor Measurement System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Страница 474: ...D 10 N60 Network Stability and Synchrophasor Measurement System GE Multilin D 1 IEC 60870 5 104 PROTOCOL APPENDIXD D ...
Страница 486: ...E 12 N60 Network Stability and Synchrophasor Measurement System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...