ComAp MainsPro - Measurement Screens

MainsPro, SW version 1.4, ©ComAp – January 2013
MainsPro Installation and Operation Guide
1-17
Meaning of signalling LEDs
LED
Colour
Meaning
Orange
flashing
Indication of internal failure. Contact ComAp technical
support!
Orange
Indication of internal failure. Contact ComAp technical
support!
Green
The unit is in operation with no internal problems.
Nothing
The unit is not in operation
Alt
Orange
The function Alternative setting is activated by means of
binary switch Alt setting.
Nothing
The function Alternative setting is not activated
Dis
Orange
The unit is disabled by means of binary switch Disable
Nothing
The unit is not disabled by means of binary switch Disable
Measurement screens
Following are the examples of the measurement screens, showing values measured and evaluated by
the unit:
Main measurement screen (homepage),
3-phase application:
- U: measured voltages on terminal sets Ua, Ub and
Uc. If overvoltage or undervoltage is detected on a
particular phase, arrow symbol is displayed left of
the particular voltage value.
- f: measured frequency on terminal set Ua. If
overfrequency or underfrequency is detected, arrow
symbol is displayed left of the frequency value.
- Last Trip: indication of the latest event, which
caused trip by the MainsPro unit. See the following
chapter for trip messages explanation.
Main measurement screen (homepage), 1-
phase application (setpoint System set to
1ph):
- U: measured voltage on terminal set Ua. If
overvoltage or undervoltage is detected, arrow
symbol is displayed left of the voltage value.
- f: measured frequency on terminal set Ua. If
overfrequency or underfrequency is detected, arrow
symbol is displayed left of the frequency value.
- Last trip: indication of the latest event, that caused
trip by the MainsPro unit
Loss of mains (LOM) measurement screen:
- Max Vs: maximum value of measured Vector shift
since unit power-up or since the last reset Vector
shift trip.
- Act RCF: actual measured value of ROCOF
protection
- Max RCF: maximum value of measured ROCOF
protection since unit power-up or since the last reset
ROCOF trip.
Voltage asymmetry measurement screen:
- V asymmetry: actual value of asymmetry of effective
values measured on terminals Ua, Ub, Uc
- V negative: actual value of negative sequence
voltage
- V positive: actual value of positive sequence voltage
Negative sequence overvoltage and positive sequence
undervoltage are methods of evaluation of angle
asymmetry of the 3-phase voltage system. See more in
the chapter Voltage unbalance and angle asymmetry