Tag: testing and commissioning

Commissioning Procedure for Electric HT Motor

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Commissioning Procedure for Electric HT Motor

Quick Guidelines of Industrial Electric HT Motor Pre-Commissioning checks:- Check for the proper fixing motor on the foundation. Check that the motor can be easily turned over by hand. Check motor winding resistance on each phase; verify that they are equal. IR value and PI value of the motor to be checked. IR values and HV test on the cable to be performed. Check all the tripping and alarm signals from winding and bearing TRDs (through scanner if provided) Testing of ht motor protection relay and tripping of the circuit breaker…

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Electrical Switchboard / Switchgear testing and commissioning

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Switchgear testing and commissioning electrical Switchboard

Electrical Switchboard / Switchgear testing and commissioning manual -From 3.3kv up to 33KV In this article I go to share the actual what we do in after panel/ switchgear installation and what are  the procedure of switchgear testing and commissioning ? Here we go: The test procedure described are applicable to metal clad switchboards. A switchboard comprises of circuit breakers, CTs, PTs, protection relays, & metering equipment. Commissioning procedure will be described for one panel and the same is applicable for the entire switchboard. As mentioned earlier the switchboard comprises various equipment…

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Voltage Transformers testing and commissioning Guidelines

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Voltage Transformers ratio check

Potential / Voltage transformers Testing and Pre-Commissioning Check   Potential /Voltage transformers can be broadly divided in to two type : Indoor and outdoor type. Indoor type – Cast resin. Outdoor type – Live tank, Oil cooled.These can be of electromagnetic of capacitive voltage transformer type (CVT). PT rating  are specified as follows –  1) Metering Core-  132 KV /3 : 100v / 3 – nominal ratio 100 VA – Rated burden Class 1.0- Accuracy is 1 %, between 80 % and 120 % of rated voltage and with burdens between 25…

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Current transformers Testing and Commissioning Guidelines

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Commissioning Procedure for Current Transformers Current transformers (CTs) can be broadly divided in to two type, Indoor and outdoor type. Indoor type – Cast resin : wound type and window type. Outdoor type – Live tank , Oil cooled and dead tank , oil cooled. CT rating are specified as follows- Metering core 200/5 – nominal ratio 15VA – Rated burden : the maximum burden (i.e. impedance) that may be connected on the CT secondary side. Class 1.0- Accuracy at 100% rated current and burden is 1.0% Protection Core 200/5-…

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Power Transformer Testing and Commissioning Guidelines(Oil Type)

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Testing of stability of transformer differential Scheme

Commissioning Procedure Of Power Transformer  In Transformer testing it can be classified into power and distribution transformers. It Rating plate show nominal voltage, current of  primary and secondary voltage at various of the tap changer, connection symbols ( vector group), % impedance weight of oil etc. Before starting transformer testing some of per-commissioning checks a physical inspection of transformer is to be carried out along with the general arrangement drawing.The parts mentioned on the drawing are to be checked for physical mounting. Check the following points before start the  Transformer…

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