MainsPro G99TT 1.0.0 Global Guide
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12.3.16 !dU Sig
Inverse immediate signaling relay – asymmetry; opens immediately in case of voltage (amplitude) unbalance,
positive sequence undervoltage, negative sequence overvoltage, or failure (over or under frequency). The
relay closes in case that all three methods of voltage asymmetry are in fail-free state, but no sooner than after
Imp Len [s] (page 55) 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 asymmetry
protection is disabled by setpoint (limit set to 0), the output does not signal activation of this protection stage.
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12.3.17 Other Sig
Immediate signaling relay – other failures; closes immediately in case of incorrect phase rotation, wrong
polarity of one phase or External trip. The relay opens in case that all observed failures are not active, but no
sooner than after Imp Len [s] (page 55) 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.
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12.3.18 !Other Sig
Inverse immediate signaling relay – other failures; opens immediately in case of incorrect phase rotation,
wrong polarity of one phase or External trip. The relay closes in case that all observed failures are not active,
but no sooner than after Imp Len [s] (page 55) 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.
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12.3.19 Alt Sig
This output signals activation of binary input Alt Setting.This output is activated as long as alternative setting
is active and Alt setting is enabled.
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12.3.20 TrpEndImp
Impulse at the end of the TRIP state. The output is normally activated during operation of the unit. The output
deactivates at the end of the TRIP (page 31) (i.e. after successful Fault reset (page 32) is performed) for
period given by the parameter Imp Len [s] (page 55).
In case of subsequent trip in the moment of the output deactivation, the countdown of the Imp Len delay is not
interrupted and the output stays deactivated for the complete Imp Len period. If in that period the TRIP state is
terminated again, the deactivation period is prolonged to Imp Len from the latest Fault Reset. If during TRIP
state the unit is disabled by the input Disable (page 63), the output TrpEndImp is deactivated, same as in
case of a successful Fault reset.
The output can generally be used for closing the circuit breaker by the ON coil.
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