maintenance of distribution
TRANSCRIPT
-
7/28/2019 Maintenance of Distribution
1/14
Presentation on
maintenance ofDistribution
Systems
-
7/28/2019 Maintenance of Distribution
2/14
SAFETY
Before carrying out any maintenance
work, all the safety procedures should
be strictly adhered to.
SAFETY FIRST,SAFETY NEXT,SAFETY
ALWAYS
-
7/28/2019 Maintenance of Distribution
3/14
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.
-
7/28/2019 Maintenance of Distribution
4/14
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.
-
7/28/2019 Maintenance of Distribution
5/14
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.
-
7/28/2019 Maintenance of Distribution
6/14
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 )
-
7/28/2019 Maintenance of Distribution
7/14
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.
-
7/28/2019 Maintenance of Distribution
8/14
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
-
7/28/2019 Maintenance of Distribution
9/14
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.
-
7/28/2019 Maintenance of Distribution
10/14
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.
-
7/28/2019 Maintenance of Distribution
11/14
Maintenance of UG Cable.
Avoid overload.
Observe for crack, damage, etc incable termination/Pothead.seal them
using M-seal compounds wherever
necessary.
-
7/28/2019 Maintenance of Distribution
12/14
RMU and Feeder Pillar boxes.
Replacement of burnt out/ wornout spares immediately.
Cleaning of contacts, spoutinsulators.
Checking of tripping mechanism.
http://images.google.co.in/imgres?imgurl=http://www.ormazabal.com/datos/productos/foto17/rmu_cgm_cgc.jpg&imgrefurl=http://www.ormazabal.com/en/producto.php%3FId%3D17&usg=__PWOfm8tELGDWH0EHqZ2DCsj21ik=&h=345&w=250&sz=27&hl=en&start=18&tbnid=ccOvw-eA_9rHWM:&tbnh=120&tbnw=87&prev=/images%3Fq%3DRMU%26gbv%3D2%26hl%3Den%26sa%3DG -
7/28/2019 Maintenance of Distribution
13/14
-
7/28/2019 Maintenance of Distribution
14/14
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.