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TECHNICAL SPECIFICATION FOR LOW TENSION (FIXED) SHUNT CAPACITOR UNITS (MPP TYPE) FOR DISTRIBUTION TRANSFORMERS Spec. No. MSEDCL/Dist:MSC-III/ LT MPP CAP/11/2009/R0

a) b) c) d) e) f) g) h) i)

Reference IS : Name of manufacturer : Type of capacitor : Serial No. & year of manufacture : Rated output in KVAr : Rated voltage in Volts : Rated frequency : Temperature Category: Discharge device shall be indicated by wording or the symbol ----

  • ----

    or by the

j) k) l) m) n) o)

rated resistance in kilo-ohms or megaohms; the symbols I or E shall be used for internal or external discharge device and IC for inductive coil when provided in the capacitor. Reference to self healing design; SH or / # and type of dielectric MPP/MP Connection Symbol as per Cl. 10.2 of IS:13340 /1993 Internal fuses, if included shall be indicated by wording or by symbol. Insulation level Ui in kV Symbol for over pressure disconnector The words "PROPERTY OF M.S.E.D.C.L" shall be marked cautiously on the outer

enclosure of capacitor unit with legible marking along with details of Purchase Order No., date, rating etc.

SAFTY REQUIRMENTS:

1) Capacitor unit shall be provided with directly connected discharge device as per IS: 13340/1993.(with latest amendment)

2) The discharge devise shall reduce the residual voltage from the crest value of the rated voltage to 50 V or less within one minute after the capacitor is disconnected from the source of supply.

3) Earth Connection: The Capacitor Container shall be provided with as suitable earth terminal clearly marked. It should be suitable to take up a lug suitable for 10 Sq.mm conductors with a bolt hole dia. of 10 mm

TESTS AND INSPECTION:

TYPE TESTS:

All the tests indicated at Clause 12.2.2 of IS: 13340/1993 with latest amendments

shall constitute the type tests.

All the type tests shall be carried

laboratories

accredited

by

National

Accreditation

Board

of

Testing

and

out at the Calibration

Laboratories

(NABL)

in

accordance

with

the

IS:

13340/1993

&

the

requirements

specified in IS : 13341/1993 for detailed Type test reports have commencement of supply.

ageing test, self to be submitted

healing test to CE (Dist)

& destruction tests. The for approval prior to the

Type tests shall comprise of the following.

i)

Voltage Test between Terminals

Page 7 of 15

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