MainsPro, SW version 1.4, ©ComAp – January 2013
MainsPro Reference Guide
!CommSigImp
Immediate impulse signalling relay; opens immediately at any failure. Relay closes after Basic: Imp
Len since its opening. Any other detected fault-state during run of this timer has no effect. Fault reset
has no influence on this output.
CommSigDel
Impulse signalling relay delayed; closes at any failure with delay given by appropriate parameter.
Relay closes immediately in case of LOM protection (Vector shift or ROCOF), External trip, incorrect
phase rotation or wrong phase polarity. Relay opens after Basic: Imp Len since its closing. Any other
detected fault-state during run of this timer causes a new activation of this relay or extends timing of
Basic: Imp Len by the new impulse length from the moment of the failure detection. Fault reset has no
influence on this output
!CommSigDel
Inverse impulse signalling relay delayed; opens at any failure with delay given by appropriate
parameter. Relay opens immediately in case of LOM protection (Vector shift or ROCOF), External trip,
incorrect phase rotation or wrong phase polarity. Relay closes after Basic: Imp Len since its opening.
Any other detected fault-state during run of this timer causes a new activation of this relay or extends
timing of Basic: Imp Len by the new impulse length from the moment of the failure detection. Fault
reset has no influence on this output
U Sig
Immediate signalling relay – voltage; closes immediately in case of voltage failure (over or under
voltage). Relay opens in case that all parameters are back within limits, but no sooner than after
Basic: Imp Len from its activation. If the relay is closed during trip activation, it opens no sooner than
Basic: Imp Len since trip status activation. Fault reset has no influence on this output. If any voltage
protection is disabled by setpoint (limit set to 0), the output does not signal activation of this protection
stage.
!U Sig
Inverse immediate signalling relay – voltage; opens immediately in case of voltage failure (over or
under voltage). Relay closes in case that all parameters are back within limits, but no sooner than after
Basic: Imp Len from its activation. If the relay is open during trip activation, it closes no sooner than
Basic: Imp Len since trip status activation. Fault reset has no influence on this output. If any voltage
protection is disabled by setpoint (limit set to 0), the output does not signal activation of this protection
stage.
f Sig
Immediate signalling relay – frequency; closes immediately in case of frequency failure (over or under
frequency). Relay opens in case that all parameters are back within limits, but no sooner than after
Basic: Imp Len from its activation. If the relay is closed during trip activation, it opens no sooner than
Basic: Imp Len since trip status activation. Fault reset has no influence on this output. If any frequency
protection is disabled by setpoint (limit set to 0), the output does not signal activation of this protection
stage.
!f Sig
Inverse immediate signalling relay – frequency; opens immediately in case of frequency failure (over
or under frequency). Relay closes in case that all parameters are back within limits, but no sooner
than after Basic: Imp Len from its activation. If the relay is open during trip activation, it closes no
sooner than Basic: Imp Len since trip status activation. Fault reset has no influence on this output. If
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