ABB Relion 620 Series - Page 57

1MAC308145-MB E Section 3
RER620 application
RER620 51
Application Manual
Figure 34: Generic Up-Down counters
RER620 “Blocking Close while on Standing Trip Condition” Scheme:
This application logic is for preventing rare possibility of damage to relay, by blocking the
Close command, when there is a trip signal existing (‘standing trip’), a scenario that is
possible with an improper secondary test method. For e.g., if the tripping current is not
removed after the recloser opens, and a user or communications issues a CLOSE
command, the standing TRIP from the secondary injection has the potential to overlap
with the CLOSE command and result in damage to the relay. Note that closing into a fault,
is not the same as a standing trip. Closing into a fault will provide sufficient time between
the CLOSE and TRIP commands, even if the relay trip is set to trip instantaneously or the
shortest TRIP time possible.
The “Figure 35” shows logic scheme which disables “52_ENABLE_CLOSE” output
channel in an active TRIP (or ‘standing trip’) condition. This output channel is in-turn
connected to “ENA_CLOSE_PH_x” inputs of all phases for SCBXCBR function in
Figure 27.
UDFCNT1(UDFCNT1
UP_CNT
DOWN_CNT
RESET
LOAD
UPCNT_STS
DNCNT_STS
UDFCNT4(UDFCNT4
UP_CNT
DOWN_CNT
RESET
LOAD
UPCNT_STS
DNCNT_STS
UDFCNT2(UDFCNT2
UP_CNT
DOWN_CNT
RESET
LOAD
UPCNT_STS
DNCNT_STS
OR6
B1
B2
B3
B4
B5
B6
O
OR6
B1
B2
B3
B4
B5
B6
O
EFLPTOC3_50SEF_OPERATE
SPCGGIO2_Reset_Trip_Counters
SPCGGIO2_Reset_Trip_Counters
SPCGGIO2_Reset_Trip_Counters
SPHLPTOC1_51P_OPERATE_B
SPHLPTOC2_50P-1_OPERATE_B
SPHHPTOC1_50P-2_OPERATE_B
SPHIPTOC1_50P-3_OPERATE_B
SDPHLPDOC1_67/51P-1_OPERATE_B
SDPHLPDOC1_67/51P-2_OPERATE_B
SPHLPTOC1_51P_OPERATE_A
SPHLPTOC2_50P-1_OPERATE_A
SPHHPTOC1_50P-2_OPERATE_A
SPHIPTOC1_50P-3_OPERATE_A
SDPHLPDOC1_67/51P-1_OPERATE_A
SDPHLPDOC1_67/51P-2_OPERATE_A
UDFCNT5(UDFCNT5
UP_CNT
DOWN_CNT
RESET
LOAD
UPCNT_STS
DNCNT_STS
OR6
B1
B2
B3
B4
B5
B6
O
XEFHPTOC3_50N-2_OPERATE
XEFLPTOC3_50N-1_OPERATE
XEFIPTOC2_50N-3_OPERATE
XEFLPTOC2_51N_OPERATE
XDEFLPDEF1_67/51N-1_OPERATE
XDEFLPDEF1_67/51N-2_OPERATE
SPCGGIO2_Reset_Trip_Counters
UDFCNT3(UDFCNT3
UP_CNT
DOWN_CNT
RESET
LOAD
UPCNT_STS
DNCNT_STS
OR6
B1
B2
B3
B4
B5
B6
O
SPCGGIO2_Reset_Trip_Counters
SPHLPTOC1_51P_OPERATE_C
SPHLPTOC2_50P-1_OPERATE_C
SPHHPTOC1_50P-2_OPERATE_C
SPHIPTOC1_50P-3_OPERATE_C
SDPHLPDOC1_67/51P-1_OPERATE_C
SDPHLPDOC1_67/51P-2_OPERATE_C