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
|
