Operation Principle; Terminology Explanation; Status Descriptions - ABB RED650 Technical Manual

Section 12
Control
Name
ZoneSeqCoord
tSuccessful
tSlaveDeadTime
12.2.6
12.2.6.1
12.2.6.2
326
Values (Range) Unit
Off -
On
0.000 - 60.000 s
0.100 - 60.000 s

Operation principle

Terminology explanation

Before describing the auto reclosing function it is first necessary to define the
following terminology:
• a shot is an attempt from the function to close a circuit breaker
• multi-shot is where more than one shot is attempted
• dead time is the time between a start of the function and the attempt to close
the circuit breaker
• reclaim time is the time from the circuit breaker closing command till the
reset of the function, should the auto reclosing attempt be successful and no
new start is received
• high-speed shot is generally used for an application where the dead time is
less than 1 second and synchrocheck is not required
• delayed auto reclosing is generally regarded as an application where the dead
time is greater than 1 second and where typically synchrocheck is required
• sequence is the auto reclosing cycle beginning with start and ending with
successful, unsuccessful or aborted reclosing as a result
• status is the state which the auto reclosing function have reached in the
sequence

Status descriptions

The auto reclosing function can be in one of the following five statuses:
"Inactive"
The auto recloser is in "inactive" status when the following conditions are fulfilled:
• the auto recloser is set to On and
• either the circuit breaker is not closed
• or the circuit breaker is not ready
The function will not react on any start from protection trips while in
"inactive" status and no automatic reclosing is possible.
Step Default
- Off
0.001 1.000
0.001 0.400
1MRK 505 394-UEN A
Description
Coordination of down stream devices to
local protection unit's AR
Delay time before indicating successful
reclosing
Wait time for the slave to close when
WAIT input has reset
GUID-EA0760DF-8F0B-4146-8A42-3F20E75E1053 v1
GUID-AFC069D6-ADA5-4D97-9699-8C9F058458EB v1
GUID-BF80C969-FCBE-4CAB-BF71-9590A2DB433C v1
Line differential protection RED650 2.2 IEC
Technical manual