Supply Interrupt
If the fault resets and the upstream device trips within the Supply Fail Time, a Supply Interrupt will be logged for the faulted element. The Supply Interrupt Flag is an indication that the fault was downstream of the ACR that is it performs the function of a fault passage indicator.
The conditions required to generate a Supply Interrupt are:
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Fault detection.
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Fault reset.
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Source supply goes to zero volts within the Supply Fail Time following step 2.
Once a Supply Interrupt Flag has been set, it can be cleared by any of the following:
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Any switchgear close.
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Any phase current above 2 A.
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Any phase to earth voltage above the Live Line Threshold on both sides.
The Supply Fail Time is available in the WSOS Universal Settings page shown below.
Figure 127
Supply Fail Time setting
The Supply Fail Time can also be configured on the operator interface.
Alarms generated by this feature are available for transmission via SCADA.