ABB RELION REX640 - Circuit breaker closing time measurement, “From Pos to Pos”; Circuit breaker closing time measurement, “From Cmd to Curr”; Circuit breaker closing time measurement, “From Pos to Curr”

Circuit breaker closing time measurement, “From Pos to Pos”
“From Pos to Pos” measures the closing time from auxiliary contacts. This will not
represent the actual closing time but it can be used to check that circuit breaker
reaches end state and that it will not hang to intermediate state (POSOPN and POS
CLS are both False).
This mode is recommended only for supervision purposes to alarm
incase breaker doesn’t close properly, not to measure actual travelling
time .
Circuit breaker closing time measurement, “From Cmd to Curr”
“From Cmd to Curr” measures the closing time from binary output activation till
current is flowing in the primary circuit. This operation mode requires that current
signal is connected to I3P1 and I3P2 inputs.
PO
SOPN_CB2 – AUX BIN
POSCLS_CB2 – AUX BIN
Current in Feeder 2 /
CB2
OPEN_CB2 – FB CMD
CLOSE_CB2 – FB CMD
RELAY BINARY OUTPUT
Closing �me
1 2
3
Internal Logic + BO ac�va�on delay
Figure 950: Circuit breaker closing time measurement (“From Cmd to Curr”)
1
HSABTC function activates CLOSE_CB2 output
2 Relay binary output activates – closing time measurement starts from this
point
3 Circuit breaker main contacts close and current flows
Recommended operation mode
Control functions 1MRS759142 F
1784 REX640
Technical Manual