ABB Relion 630 Series Operation Manual

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Contents

ABB Relion 630 Series Operation Manual Manual pdf 96 page image

7.3.3.1 Inspecting the wiringThe physical inspection of wiring connections often reveals the wrong connection forphase currents or voltages. Even when the phase current or voltage connections to IEDterminals are correct, wrong polarity of one or more measurement transformers cancause problems.• Check the current or voltage measurements and their phase information fromMain menu/Measurements.• Check that the phase information and phase shift between phases is correct.• Correct the wiring if needed.• Change the parameter ReversePolarity in Configuration/I/O modules/AIM2 for the channel n (n= the number of the channel that has wrongpolarity).• Change the parameter in PCM600. See PCM600 documentation for moreinformation.• Check the actual state of the connected binary inputs.• In LHMI, select Main menu/Monitoring/I/O status/Binary inputmodules. Then navigate to the board with the actual binary input to bechecked.• Check the actual state of the connected binary inputs through PCM600. SeePCM600 documentation for more information.• Measure output contacts using the voltage drop method of applying at least theminimum contact load given for the output relays in the technical data, forexample, 100 mA at 24 V AC/DC.Output relays, especially power output relays, are designed forbreaking high currents. Due to this, layers of high resistance mayappear on the surface of the contacts. Do not determine properfunctionality of connectivity or contact resistance by measuringwith a regular hand-held ohm meter.Section 7 1MRS756509 ETroubleshooting88 630 seriesOperation Manual