Signals - ABB RELION REX640 Technical Manual

Section 6
Supervision functions
6.8.7
1244
Incoming Feeder1 (primary source)
CB1
Measurement
CB3
M
GUID-1C1F55C0-066B-4F35-B899-0AD17485322F V1 EN
Figure 677: Example of remanent voltage supervision before fault
CB1 is tripped when a fault occurs on incoming Feeder1. MSVPR gives permission
to control logic when the remanent voltage of the motor reaches a safe level on Bus1.
Control logic closes the tie breaker CB5 if closing conditions are met. Finally, the
motor is re-energized by incoming Feeder2 (see
Incoming Feeder1 (primary source)
CB1
Measurement
CB3
M
GUID-0602F6B1-D547-4DC0-A9F0-48AB8A7BDACF V1 EN
Figure 678: Example of remanent voltage supervision after fault
MSVPR runs in the range of 10...70 Hz. If the frequency is lower than 10 Hz, the motor
terminal voltage is very low. The remanent voltage setting is typically set to 20...30
percent of the rated voltage.

Signals

Table 1180: MSVPR Input signals
Name Type
U3P SIGNAL
BLOCK BOOLEAN
Incoming Feeder2 (backup source)
Bus1 Bus2
CB5
Control logic
MSVPR
Figure
Incoming Feeder2 (backup source)
Bus1 Bus2
CB5
Control logic
MSVPR
Default Description
- Three-phase voltages
0=False Block signal for activating the blocking mode
1MRS759142 C
CB2
Measurement
CB4
Outgoing Feeder1
678).
CB2
Measurement
CB4
Outgoing Feeder1
REX640
Technical Manual