Rev.01
61/151
8
CONTROL AND SUPERVISION FUNCTIONS
8.1 Function 79. AC Reclosing device
The reclosing function tries to reconnect the circuit breaker after a fault. It has four reclosing attempts
capacity. After them, if the circuit breaker has not reclosed correctly, it goes
to ‘Lockout’ state.
The reclose can be disable if it is not required, by setting the
Number of Recloses
to 0.
Disable must not be confused with blocked. Disable means that the recloser shall never be in operation,
regardless of the controls performed on it. A blocked recloser means that the recloser is not operative,
but either because it has reached the end of the reclosing cycle, or an irregularity has been detected, or
someone has performed a control procedure on it reaching the Lockout state.
Each reclosing cycle has its own specific operation time (
Reclose Time #
) that can be set independently.
Also, up to four different signals with a logic condition can be assigned to the start condition (logic signal
-
79N# Start
) of each cycle. The cycles are always done sequentially, that is, if the function is going to
start the first reclose cycle, but the reclose condition for the first cycle is not achieved and the condition
for the second cycle is, then the function will not start.
If in
Hold Enable
Yes is selected, once the cycle is initiated, another permission (logic signal -
79Enable
) can be used to indicate that the recloser must wait another period of time
(Hold time
) before
closure. During this waiting time, usually an external condition wired to an external input, such as closure
synchronism, give the authorization to reconnect. If in
Hold Enable
No time is selected, there will no
limitation in terms of time, the only way to reconnect is through the logic signal 79Enable.
Apart from these times, two additional times must be set on this function:
✓
Reset time
: This is the waiting time for the recloser for a final closure. If during this time, there
is another trip, the recloser count will increase.
✓
Safe time
: Is the security time used by the recloser. When it comes from a lockout mode
consequence of an unexpected condition of a reclose cycle and the circuit breaker is closed this
waiting time must be observed. On exceeding this time without a circuit breaker opening, the
recloser switches to Standby mode.
Function
Description
Minimum
Maximum
Step
Unit
Default
79
AC Reclosing Device
Number of Recloses
0
4
1
-
0
Reset Time
0.020
2000.000
0.001
s
5.000
Reclose time 1
0.020
2000.000
0.001
s
0.800
Reclose time 2
0.020
2000.000
0.001
s
1.600
Reclose time 3
0.020
2000.000
0.001
s
3.000
Reclose time 4
0.020
2000.000
0.001
s
9.000
Hold Enable
-
-
No/Yes/No time
-
No
Hold time
0.000
2000.000
0.001
s
0.200
Safe time
0.020
2000.000
0.001
s
30.000
Another time setting, configurable in function 52, is used on the state machine on the recloser.
Summary of Contents for SIL-G
Page 1: ...USER S MANUAL USER S MANUAL SIL G Feeder Relay...
Page 8: ...www fanox com Rev 01 8 151 2 3 Connection diagrams 2 3 1 Analog current connections...
Page 10: ...www fanox com Rev 01 10 151 3 VT configuration phase neutral...
Page 11: ...www fanox com Rev 01 11 151 3 VT configuration phase neutral residual voltage...
Page 12: ...www fanox com Rev 01 12 151 3VT configuration phase phase residual voltage...
Page 13: ...www fanox com Rev 01 13 151 2VT configuration phase phase residual voltage...
Page 14: ...www fanox com Rev 01 14 151 3 VT configuration phase neutral phase B line voltage...
Page 27: ...www fanox com Rev 01 27 151 Dimensions 175x175x150 3 3 Functional diagram...
Page 28: ...www fanox com Rev 01 28 151...
Page 69: ...www fanox com Rev 01 69 151 General trip...
Page 88: ...www fanox com Rev 01 88 151...
Page 89: ...www fanox com Rev 01 89 151...
Page 90: ...www fanox com Rev 01 90 151...
Page 95: ...www fanox com Rev 01 95 151 Time Minutes Seconds Milliseconds...
Page 150: ...www fanox com Rev 01 150 151 NOTES...
Page 151: ...www fanox com Rev 01 151 151...
