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SIF5600 - Manual - 03 - 2008
50-51
Overload (51) I> and short circuit (50) I>> protective functions.
the sub-menu comprises the calibration parameters relating to the two maximum overcurrent
thresholds, selection of the first threshold I>, the type of trip curve (time dependent or independent)
and the optional activation of the input and/or output block function on the second threshold I>>.
50-51
submenu example:
I curve
Independent Setting time independent trip characteristics
I>indep
1.00 In
Setting the I> function trip threshold as time independent
t>indep
400 ms
Setting the I> function trip time as time independent
I>dep
1.00 In
Setting the I> function trip threshold to time dependent
t>dep
1.00 s
Setting the I> function trip time as time dependent
I>>indep
7.00 In
Setting the I>> function trip threshold
t>>indep
30 ms
Setting the I>> function trip time
Blin I>>
Off
I>> function NOt assigned to the block input circuit
Blout I>>
Off
I>> function NOt assigned to the block output circuit
Note:
for the overload function I> (5) it is possible to set all the calibration parameters concerning to the maximum overcurrent thresholds and the
trip times for both operating curve characteristics (inverse time or definite time).
50N-51N
Ground fault (50N-51N) Ie> and Ie>> protection functions
the sub-menu comprises the calibration parameters concerning the two maximum residual current
thresholds, selection of the first threshold Ie>, the type of trip curve (time dependent or independent)
and the optional activation of the input and/or output block function on the second threshold Ie>>.
example messages:
Ie curve
curve B
Setting curve B time dependent trip characteristics
Ie>indep
0.010 Ien
Setting the Ie> function trip threshold as time independent
te>indep
50 ms
Setting the Ie> function trip time as time independent
Ie>dep
0.010 Ien
Setting the I> function trip threshold to time dependent
te>dep
1.00 s
Setting the Ie> function trip time as time dependent
Ie>>ind
0.20 Ien
Setting the Ie>> function trip threshold
te>>ind
70 ms
Setting the Ie>> function trip time
Blin Ie>>
On
Assigning the Ie>> function to the block input circuit
Blout Ie>>
On
Assigning the Ie>> function to the block output circuits
Note:
for the earth fault function IE> (5N) it is possible to set all the calibration parameters concerning to the first thresholds and the trip times for
both operating curve characteristics (inverse time or definite time).
52 Circuit breaker management
the sub-menu contains parameters allowing the following actions:
- enable/disable the (local) breaker open/close buttons,
- enable/disable the (remote) breaker open/close remote commands,
- enable/disable diagnostic monitoring of the breaker status; when diagnostic monitoring is disabled
the flashing of the LeDs is deactivated along with the alarm commands on the relay if programmed
for breaker diagnostics (check).
By enabling remote commands, it is possible to operate breaker opening and closing by means of the
Open 52 or close 52 commands located in the
Command
menu.
52
submenu example:
52 local
On
Local commands (buttons) are enabled
52 remote
Off
remote commands are disabled
52 check
On
Breaker status acquisition is enabled
Note:
by selecting
52 check Off
, the LED indicators concerning to the breaker state are inactive.