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12

Discharge devices.

Discharge voltage less than 50V within one minute.

13

Life expectancy

100000 Hrs.

14

Insulation level

3 KV

15

Reference standards.

IS: 13340/1993, IS 13341/1992, IS12672/1989,

IEC 831-1

3.2

RATED VOLTAGE:

The rated voltage shall be 440 volts with fluctuation in supply voltage as specified in IS: 585/ 1962 and IS: 12360/ 1951 (with latest amendment) and shall not affect the normal working of the equipment.

3.3

PERMISSIBLE OVERLOADS:

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

Sr. No. 11

Particulars

Requirements

Max. average temperature 40° C

value over 24 hrs.

  • 1)

    Permissible overload should be as per IS: 13340/1993.

    • i)

      Voltage: Capacitor shall be suitable for prolonged operation at RMS voltage

between terminals not exceeding 1.10 times the rated voltage as per IS13340/1993.

    • ii)

      Current: Capacitor shall be suitable for continuous operation at R.M.S. line current of 1.30 times, the current that occurs at rated sinusoidal voltage and rated frequency excluding transit.

      • 3.4

        DIELECTRIC:

The capacitor elements should be wound in Metalized polypropylene film

. The

capacitor unit shall be self-cooled. Dielectric consists of three layer metalized (Silver, Zinc, Aluminum) polypropylene (MPP) with heavy edge.

3.5

IMPREGNATION:

The elements shall be impregnated with a impregnant which has been completely refinished and degasified so as not to have any deterioration of the dielectric material. The impregnant used shall have high dielectric constant, low viscosity and high chemical stability. The impregnant should be NPCB (Non - poly chlorinated Biphenyl) with low RAPID BIO DEGRADATION AND LOW TOXICITY and should be non – oxidizing and especially suitable for capacitors.

3.6 A. HOUSUNG FOR CAPACITOR UNIT

The Housing in CRCA sheet steel (Square Type or Cylindrical type ) enclosures fully metal with 2 mm thick & shall be coated with weather proof & corrosion resistant paint of dark admiral grey shade OR the housing with SMC box conforming to IS-13410 with thickness of enclosure not less than 2 mm.

Page 5 of 15

Seal and Signature of Tenderer

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