GENERAL GUIDELINES FOR ESCOM WORKS IN KARNATAKA

GENERAL GUIDELINES FOR ESCOM WORKS IN KARNATAKA

(A) Usage of ACSR Conductor

1.      The Squirrel ACSR conductor shall not be used for any new works of KEB.

2.      The Average span for new 11 KV lines in Urban areas shall be 40 Mtr ,In Rural areas the average span length shall be 50 Mtrs. However the average span will be 60 Mtrs in respect of lines drawn to IP Sets.

Minimum size of the conductor to be used:

A.    11kV lines:

Minimum size of the conductor to be used for all new 11 KV lines shall be Rabbit ACSR only.

B.    LT lines:

a) Urban areas: Minimum size of conductor to be used for phases and neutral shall be Rabbit ACSR conductor.

b) Rural areas: The minimum size of conductor to be used shall be Weasel for phases and neutral.

c) Only Weasel Conductor shall be used for Street Light Control, Gangakalyana and water works.

(B)  Transformers:

a.       As per MOP directions, only Star 1(Previous 4 Star) rated transformers have to be used in Rural areas and

b.      Star 2 (Previous 5 Star) rated transformers have to be used in Urban/City areas.

c.       For Self-execution and layout works only Star 2 (Previous 5 Star) Transformers have to be provided.

 (C) Providing of GOS and HG Fuse unit:

All transformers above and inclusive of 25 KVA capacities are to be provided with GOS and HG fuse units.

(D) Providing Distribution Boxes and LT Protection Kit and DTCs:

As per the ESCOMS

1.      25/63/100 KVA transformer shall be provided with LT Protection Kit.

2.      Transformers with 250 KVA capacities and above shall be provided with LT Distribution Box with MCCB.

3.      In city limits transformers with 100 KVA capacities shall be provided with LT Distribution Box with MCCB.

(E) Guy set:

Guy set includes Anchor Rod, Turn buckle, Guy wire, Strain Insulator, Guy clamp with Bolts, Nuts and Washers

Note: As per the CEA guidelines, Transformers of capacity more than 25kVA have to be erected on DP structures/Plinth only.

Distribution Transformer with required CT Ratio in Trivector meter

Distribution Transformer Capacity	CT Ratio
15/25 kVA DTC	50/5 Amps
50/63 kVA DTC	100/5 Amps
100 kVA DTC	150/5 Amps
250 kVA DTC	400/5 Amps
500 kVA DTC	800/5 Amps