ABB RER620

1MAC309294-MB F Section 4
Protection functions
RER620 245
Technical Manual
Figure 114: Functional module diagram, typical for Phase A, when single phase
operation mode is selected
The following figure is applicable when 3 phase operation mode is selected in the unit. The
signal input POSCLOSE is typically the status input of a three pole breaker / recloser. In
case there are separate pole operating mechanisms, the input is OR combination of all three
phase inputs either through parallel connection of 52a inputs wired to a binary input or
through a logic.
Timer 1 elapsed
BLOCK
&
CLS_RET_A
CB_ FAULT
&
POS_CLOSE_A
RETRY LOGIC
START_A
BLOCK
&
Timer sta
Timer 1 elapsed
Set
Reset
or
POS_CLOSE_
A
&
TON
150 ms
START
LOGIC
START_A
BLOCK
t
Timer 1
CLS_RET_A
CB_ FAULT
POS_CLOSE_A
Start
logic
Close
retry
logic