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  • b)

    Structure: Sharp corners avoided.

  • c)

    Lamination: Treated & coated with suitable insulations.

17. TRANSFORMER WINDING:

a) Permanent joints

: Welded /brazed.

b) Threaded connection

: Provided with locking devices.

c) Drying

: Circulating air oven and vacuum impregnated.

  • 18.

    LIST OF FITTNGS AND ACCESSORIES:

    • a)

      Bushings inside 11000 Volt winding line end - cable box

: 3 nos.

  • b)

    Bushings inside Star Point end- cable box

  • c)

    Bushings inside 7150 Volt end - cable box

  • d)

    Bushings inside 6600 Volt end- cable box

  • e)

    Bushings inside 6050 Volt end- cable box

  • d)

    Lifting lugs. - 04 nos.

: 3 nos.

: 3 nos.

: 3 nos.

: 3 nos.

  • e)

    Earthing terminals - 2 nos.

  • f)

    Jacking lugs.

  • g)

    Base channels with bi-directional rollers.

  • h)

    Conservator with oil filling hole cap and drain plug. Oil level indicator with minimum and

maximum marking should be fitted in the conservator.

i) Any other accessories which bidders think essential & required as per IS should also be included.

j) All the bushings must be suitable for 11000volts.

19. RATING PLATE

Should be as per IS: 2026 -1977 and following additional informations should be given in addition to standard informations.

a)

This transformer is designed for starting duty of 5000HP, 11KV, 3 phase, squirrel cage

induction motor. Short time rating is for one minute. Maximum permissible starts are 3 nos. per

hour, starting from cold including 2 consecutive starts.

b)

Only one secondary voltage tape should be used at one time. Winding terminals 1U2,

1V2, 1W2 brought out to a separate cable box to form star point will be made through 11KV

breaker by customer.

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