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Each motor rating is 280 KW& Medium Voltage ( 6.6 KV). Today I will talk about Testing & Commissioning (T & C) since it is the trend right now and will try my best to make it simple for easy understanding by engineers. Now you can download below mentioned 10 method statements for electrical testing and commissioning.These method statements are in editable formats with all necessary supporting forms and checklists.Each method statement folder contains method statement, ITP, Checklists and risk assessment. These method statements are in editable formats with all necessary supporting forms and checklists. These method statements are in editable formats with all necessary supporting forms and checklists.
The purpose of this method statement is to outline the sequence and method of Testing & Commissioning of.Following tools and equipment shall be arranged before the activity.Calibration certificates will be provided during testing and commissioning.Important: Ensure equipment is disconnected from any possible source of electrical supply; disconnect.Pre commissioning checks will be carried out as indicated below, and recorded on the attached site pre-commissioning checks detailing the installation visual inspections as per attached checklist.Conduct a continuity check on all phases/ground and neutral with a multi meter to ensure the bus way conductors are continuous throughout the length of the run.Bus duct will be tested end to end with the readings taken at LV room.Results to be recorded on the bus duct record sheet.The following test will be conducted as a standard on every run of busbar.This check is to verify the integrity of the insulation of the busbar following the installation and site conditions.Insulation resistance will be carried out by IR tester at DC 1000 Volts to ensure that the system is free from short circuits and grounds.The tests will be carried out Phase to Phase, Phases to Neutral and Phases to Earth and Neutral to earth.Reading will vary widely between site due to length of run, humidity etc.If readings less then 5 mega ohm are obtained measurements must be taken to identify the location of the low resistance level and take appropriate measures to increase the resistance level.This test should only be carried out by competent personnel.Note: In order to avoid nuisance in megger readings, remember to open circuit all the controls wiring inside the switchboard where busbar flange is connected.Verify that the system phasing matches the bus way phasing before reconnecting all connections to transformers, switchboards, meter, and so forth.Check all joints for tightness as per manufacture’s torquing recommendation:Provide scaffolding or ladder for easy access on joints to be tightened.A double headed torque indicating bolt is provided to ensure that proper installation torque is achieved.Initially the bolt can be tightened with a standard spanner, if it has to be removed in future, the re tightening torque, using a torque wrench 50 – 60 ft pounds.Fall away instruction tags are furnished on the torque indicating bolt heads to allow for visual inspection from a distance.When the proper torque value is achieved, the top bolt head will shear off and allow the tag to fall to the floor.Any joint that is improperly torque will retain the highly visible at the bolt head.Move to the next joint and perform the same procedure.Re – check the Insulation Resistance test after torquing of the.Prior to energizing perform all below checks:When reconnecting the system prior to energization ensure correct phase rotation is achieved by testing prior to energizing the supply.Ensure all tap offs are turned off again prior to energizing.Only authorized, competent personnel should energize electrical circuits in line with switching procedure and permit to work forms provided by the site supervisor.The main supply switch to the busbar is to be energized first. The motor is refrigerant cool.Please let me know site and factory commissioning …
Discharge the pole & also the HV test kit.Repeat the test for Y-phase & B-phase & tabulate the results.Check the tightness of secondary connections to all the metering circuits.Inject the nominal secondary values step by step using secondary injection kit to the power scheme & tabulate the output values as per the rating of meters.Ensure that all the precommissioning checks are carried out successfully.The incoming supply of the LV switch gear shall be measured for current, voltage, frequency & phase sequence.The outgoing feeders shall be energized one by one & the supply shall be measured for current, voltage, phase & frequency.Check the metering functions for proper operation & correct readings.Check the circuit breakers on/off function.Pre-commissioning check sheet for LV Switchgear,Commissioning check sheet for LV Switchgear.
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