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Check List for Earthing

Er. Parbhakar Dwivedi
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Check List for Earthing Document Ref. No. 2.7
Contractor: Client:
Project: Location:
Supplier/Vendor:
Reference Drawing no:
Check List (Please tick mark in appropriate column)
Check Points Observations
Contactor/ Vendor Client
Check that the earthing pits are of specified depths & width
Check that Charcoal / salt are free from foreign body
Check that the Earthing pipe - length / class of pipe and fittings - are as per specifications
Check that Earthing plate dimensions / specifications are Correct
Check that the Distance between two earthing pits are not less than 9 feet
Check that Earthing chambers are constructed with covers
Check that Earthing strips are connected properly
Ensure water outlet over funnel is provided
Check that all earth station chambers and connections are done as per drawing.
Measure resistance of each earth pit / rod by isolating the same from station grid as well as from other earth pit / rods and then measure resistance of two earths at a time by D.C. drop method.
Check continuity of grid conductors and wires.
Soil resistivity tests.
In addition to the above, any other tests specified by manufacturer shall be carried out as per manufacturer’s instructions.
Measure voltage across bearing pedestal insulation and between rotor shaft and bearing.
Test the fire detection system if provided.
Check operation of protective relays by putting short circuit bar at different locations
Check open circuit and short circuit characteristics of generator.
Check load characteristics of exciter
General remarks, if any

 

 

 

Checked by:____________________________ (Site Engineer) Signature:

Date :

Review and approval by: CM/ PM

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