socomec ATyS C20 Mode D'emploi page 53

5.2. Programming (cont.)
5.2.7. Inputs / Outputs Menu (cont.)
Outputs
Variable Description
S1A
1
Source available. Output activated as soon as source
S2A
2
Source available. Output activated as soon as source
LS Load shedding relay. LS timer corresponds to time available to disconnect the shed loads.
The relay is activated before permutation on standby network according to LS timer.
The relay is de-activated after retransfer on mains network and LS timer countdown.
In case of LS function selection, it is required to configure associated LS timer.
Output Function
S1A, S2A, LS
1 2
1 2
* In case of 2AT variable configuration below LS, LS will be automatically set to 2AT value.
Example: LS configuration (output relay Ou1, 3 seconds):
The load shedding can't be used with the priority network
(priority source = source
5.7.7-2
Load shedding cycle
2AT timer
LS timer
LS AC II Load shedding output
The output is de-activated in case of loss of power. It may then be required to put in parrallel with the load
shedding ouptut relay, position II auxiliary contact. This would avoid taking back the load in case of loss of
emergency source in emergency position.
1 2
Setting range
For LS:
0 to 60 s (≤ 2AT*)
2
). In this case, LS output is not valid.
Priority source -
emergency source
transfer
Position II (emergency) AC activation
LS relay Activation
1
is considered available (similar to front led source
2
is considered available (similar to front led source
Default value
For LS:
3 s
1 2
1 2
Emergency source -
priority source
transfer
ATyS C20 / C30 - Ref. : 532 214 F
5. OPERATION
1
).
2
).
LS timer
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