IE Rules for DP Structure

Indian Electricity Rules for Double Pole Structure(D.P):

IER-61-2.

Only one connection with earth has been provided for the frame of A B switch. One more  Separate and Distinct connection with earth should be provided for frame of the A B switch.

IER-61-2.

Only one connection with earth has been providing for the frame of the H G fuse. One more  Separate and distinct connection   with earth should be provided for the frame of HG fuse.

IER -29&5b.

The metal cover of the transformer (top cover) on which the HV and or LV busing are  Housed should be Looped to earth to avoid any fault current passing through fastening bolts.

IE R-9 2.

The earthling lead of the HV lighting arrester is not kept separate but it mixed with other Connections. The earthling lead from the HV lighting arrester should not be used for earthling Any other gear and should be taken to a separate electrodes.

IER-51-1 b & 61 -3.

The GI pipe enclosing the MV circuits on the secondary side of the transformer are Not earthed. This should be earthed.

IER- 29&9 2.

The earth lead from the HV lighting arrestor is taken through GI pipe. The above earth lead Should not Pass through any iron steel pipes.

IER 29&51b

The AB switch handle has not been earthed. The same should be earthed effectively.

IER-29

Masonry through are not provided for the earth electrodes. Masonry through should be Provided for the Earth electrodes.

IER -29.

No name board has been provided for the substation. A name board with all particulars Should be providing.

IER 50 1 b.

There is no fuse control on the secondary side of the transformer but only the outgoing Feeders are provided with fuse control. Porcelain fuse unit of adequate capacity should be Provided for the transformer on the secondary side and only from these fuse unit supply to the outgoing feeders should be tapped.

IE R-29.

The handle of the AB switch has been fixed at a height of about 4-5 feet’s for easy operation.

IER 29.

The UN supported length of jumper in the transformer structure is more than5 feet. The same Should be restricted to a length  of 5feet.

IER 51 1a & b

All the open wiring on the secondary side of the transformer should be closed in conduits.

IER 29.

The secondary control of porcelain fuse carrier is not housed in distribution box. They should Be housed in the distribution box No breather has been provided for the transformer a breather should be provided for the transformer.

IER 29.

Some of the fuse units are broken. The broken fuse units should be replaced by fresh unit.

IER 50 1b.

The feeders emanating from the secondary fuse control are not provided with separate fuse Unit individually. Further one feeder is tapped from another. There should not be any tapping In the feeder and the entire emanating feeder should be provided with fuse units individually.

IER 51 -1b

The providing pipe of the AB switch has not been earthed. The same should be earthed Effectively.

IER 91 .

Earthed called guarding has not been provided at the place where the HV/MV lines are Crossing the road. Suitable earthed cradle guarding should be provided for the road crossing.

IER 29.

The metal parts of the DP structure distribution box have rusted badly and requires Repainting. Repainting should be carried out to the above structure and should be maintained Properly.

IER 29.

All the routine maintenance work on the transformer like testing of transformer oil etc should Be periodically and the result obtained should be recorded up to date in a separate register.

IER 29 & 61 b.

The earth electrodes provided should be tested periodically for satisfactory results and Results obtained should be recorded up to date in a separated register.

IER 29.

The HV jumpers connected on the tension side are to be connected to the slack side or U Loop connection on the line.

IER29

No HV /LA (Lighting arrester) is provided for the protection of the transformer which should Be provided..

IER 51 -1b.

The metallic fittings of the insulators, strain dishes are to be looped to earth leads of Structure

IER 29

Bushes are not provided for the ends of conduit pipes enclosing MV wires on the secondary Sides. Bushes are to be provides for the ends of conduit pipes.

IER 29.

The insulated wires on the secondary side of the transformer are deteriorated and they Should be replaced by healthy wire

IER 35.

Danger notices have been provided the transformer section. Danger notice is to be provided For the transformer section.

IER29.

Oil leak in the LV bushing of the transformer should be attended.

IER29.

The position of the HV/LV is to be shifted to the other side so that the clearance between The live jumper and earthed metal parts should not less than12 inches.

IER 29.

The transformer base channel from ground is less than 7 feet and the clearance to HV live Point from ground is less than 12 feet. The above clearances are to be provided

IER 61-1a.

The transformer neutral is provided with only one earthy. The neutral should be provided With one more earth connection.

IER 61 -1a.

The transformer neutral earth lead is looped with body. The neutral earth leads should be Separated from the transformer body

IER 61 -2

The transformer body is earthed with signal earth connection. The transformer body should Be provided with two separate and distinct earth locations.