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Presentation on

maintenance ofDistribution

Systems

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SAFETY

Before carrying out any maintenance

work, all the safety procedures should

be strictly adhered to.

SAFETY FIRST,SAFETY NEXT,SAFETY

ALWAYS

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Maintenance of Distribution

Transformer

Replacement of burnt out lead wires.

Load balancing on all three phases.

Peak load recording on transformers atleast once in a week.

Load condition Balancing of loads.

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Maintenance of Distribution

Transformer If overloaded

a. load bifurcation.

b. Provision for additional transformer.

Check oil level - Topping up of oil if necessary.

Check oil level - Bi-annual testing of samples of oil

both top and bottom oil samples to be taken.

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Maintenance of Distribution

Transformer

Breather Conditioning of silica jel /

replacement of container (breather) if

necessary.Tightening of Bushings terminals/ Cleaning.

Providing protection on both HT and LT side.

3 Nos of triangular grounding to be provided

,each separated by a minimum distance of 6

metres.

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Maintenance of Distribution

Transformer

Use of graded fuse wires.

Renovation of neutral ground

connections.

Confirmation of ground connections

transformer body, LA and T.C structure.

Providing surge arrestors.Use of composite insulators

( to be discussed )

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Maintenance of Distribution

Transformer

Maintenance of G.O.S

Application of paraffin wax( petroleumjelly) and lubricant oil whenever

necessary.

Alignment of G.O.S unit.

Replacement of entire unit if even onelimb gets worn out / burnt out.

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Maintenance of 11kV / LTlines

Trimming of tree branches

Tightening of loose spans.

Providing of intermediate poles ifnecessary.

Straightening of slanted poles / providingguys if necessary

Tightening of guy wires/replacement ifnecessary.

Spacers to be provided

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Maintenance of 11kV/LT lines

Replacement of chipped out

insulators.

Bifurcation of loads if overloaded.

Tightening of jumper connections.

Use of wedge connectorspreferred. Preferred over use of

P.G clamps.

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Maintenance of 11kV/LT lines

Any metal boxes on the pole to be

grounded

Street light phase wire to be easily

identifiable from the ground level

In marshy areas, concrete filling to be

provided for the poles wherever

necessary.

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Maintenance of UG Cable.

Avoid overload.

Observe for crack, damage, etc incable termination/Pothead.seal them

using M-seal compounds wherever

necessary.

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RMU and Feeder Pillar boxes.

Replacement of burnt out/ wornout spares immediately.

Cleaning of contacts, spoutinsulators.

Checking of tripping mechanism.

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Service mains

All meter terminal covers should be sealed.

Grounding at the meter board and at sealablecutouts should be properly done by theconsumer as per norms and this has to be

verified periodically.Inspection of meters- MNR,sticky meters,directconnections to be immediately reported andaction taken .

Any defects noticed in the consumers premisesafter the point of commencement of supply,to bebrought to the notice of the consumer.