ComAp MainsPro - Page 18

MainsPro, SW version 1.4, ©ComAp – January 2013
MainsPro Installation and Operation Guide
1-16
Indication of LED LOM is immediate at detection of the particular protection stage (Vector shift
or ROCOF) and fault indication remains active for the period of time, set by the setpoint Basic:
Imp Len Del.
TRIP signalization is delayed according to the particular delay of the appropriate protective
stage.
Meaning of signalling LEDs
LED
Colour
Meaning
TRIP
Red
The unit has the appropriate outputs in TRIP position and the
unit is sensing a fault situation
Red
flashing
The unit has the appropriate outputs in TRIP position, but the
unit is sensing fault-free situation. Fault reset is possible.
Nothing
The unit has no output in TRIP position
U
Red
flashing
Voltage of any phase is above threshold for 1st or 2nd stage
overvoltage
Red
Voltage of any phase is under threshold for 1st or 2nd stage
undervoltage
Orange
flashing
Voltage unbalance (amplitude) is indicated.
If activated together with LED f and LOM, indicates incorrect
phase rotation
Orange
Negative sequence overvoltage or Positive sequence
undervoltage is indicated.
If activated together with LED f and LOM, indicates incorrect
polarity of one phase
Green
All voltages are in fault-free state
Green
flashing
10 minutes floating average overvoltage is detected
Nothing
Over/under voltage protections are not enabled by setpoint
and no other voltage failure is sensed
f
Red
flashing
Frequency as sensed on terminals Ua is above threshold for
1st or 2nd stage overfrequency
Red
Frequency as sensed on terminals Ua is under threshold for
1st or 2nd stage underfrequency
Orange
flashing
Together with LED U and LOM, indicates incorrect phase
rotation
Orange
Together with LED U and LOM, indicates incorrect polarity of
one phase
Green
Frequency, rotation and phases polarity are in fault-free state
Nothing
Over/under frequency is protections are not enabled by
setpoint and no other indicated failure is sensed
LOM
Red
Vector shift or ROCOF protection was indicated and Fault
reset was not yet done
Orange
flashing
Together with LED U and f, indicates incorrect phase rotation
Orange
Together with LED U and f, indicates incorrect polarity of one
phase
Nothing
None of Vector shift or ROCOF failure is detected or neither
Vector shift nor ROCOF protections are not enabled by
setpoint and no other indicated failure is sensed
Status
Red
flashing
Indication of severe internal failure. Contact ComAp technical
support!