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    AUX TR-1

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    kingsiva0903

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    © All Rights Reserved
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    AUX TR-1

    Uploaded by

    kingsiva0903
    2 views4 pages

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    2 views4 pages

    AUX TR-1

    Uploaded by

    kingsiva0903

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    © All Rights Reserved
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    You are on page 1of 4

    CLIENT : M/s.

    KPTCL, BALLARI
    PROJECT : M/s. GROMA INFRASTRUCTURE LTD

    PAGE No. : PRE-COMMISSIONING TEST

    TEST REPORT FOR AUXILLARY TRANSFORMER

    Location : 11KV SWITCH YARD


    Designation : AUXILLARY TRANSFORMER
    Name Plate Details:
    Make : VIJAY ELECTRIC CO
    Serial No : VEC/250/L201-01
    Rating : 250 MVA
    Voltage : HV : 11 KV LV : 433V
    Current : HV :13.12 A LV : 3333.4 A
    Vector Group : Dyn11
    Type of cooling : ONAN
    Normal Tap : 3
    Total Tap : 7
    Year of Make 02-2024
    Date of Testing : 01/07/2024

    1. Insulation Resistance Test :

    APPLIED
    VOLTAGE (DC) PHASE REF. IR VALUE
    5000 HV-EARTH 30.8 GΩ
    500 LV-EARTH 44.6 GΩ
    2500 HV-LV 21.7 GΩ

    TESTED BY VERIFIED BY WITNESSED BY


    CLIENT : M/s. KPTCL, BALLARI
    PROJECT : M/s. GROMA INFRASTRUCTURE LTD

    PAGE No. : PRE-COMMISSIONING TEST

    2. Magnetizing Current Test:

    MEASURED CURRENT IN HV (mA)


    TAP NO
    1U(mA) 1V(mA) 1W(mA)
    1 1.3 2.1 2.1
    2 1.3 1.0 1.9
    3 1.4 1.6 1.7
    4 1.6 1.6 1.9
    5 1.5 1.7 2.0
    6 1.8 1.9 2.1
    7 1.5 2.0 2.0

    3. Magnetic Balance Test:

    APPLIED HV SIDE VOLTAGE


    MEASURED LV SIDE VOLTAGE (V)
    TAP REF (V)
    1U1V 1V1W 1W1U 2U2V 2V2W 2W2U 2U2N 2V2N 2W2N
    R CUT 170.9 407 187.2 13.5 14.0 0.5 4.3 9.1 4.8

    3 Y CUT 72.9 267.8 405 5.3 16.4 11.0 1.9 7.2 9.1

    B CUT 409 251.5 86.1 16.2 4.7 11.5 9.2 6.9 2.2

    4. Winding Resistance Test:


    A) HV SIDE:

    TAP NO. 1U1V(mΩ) 1V1W(mΩ) 1W1U(mΩ)


    1 6.4 6.5 6.4
    2 6.2 6.2 6.3
    3 6.0 6.1 6.1
    4 5.9 6.0 5.9
    5 5.8 5.7 5.7
    6 5.6 5.7 5.7
    7 5.3 5.5 5.5

    TESTED BY VERIFIED BY WITNESSED BY


    CLIENT : M/s. KPTCL, BALLARI
    PROJECT : M/s. GROMA INFRASTRUCTURE LTD

    PAGE No. : PRE-COMMISSIONING TEST

    b) LV SIDE:

    MEASURED RESISTANCE VALUE (mΩ)


    TAP NO
    2U2N 2V2N 2W2N
    3 0.1 0.2 0.1

    5. Ratio test:

    APPLIED HV SIDE VOLTAGE MEASURED LV SIDE VOLTAGE (V)


    TAP NO.
    (V)
    1U1V 1V1W 1W1U 2U2V 2V2W 2W2U 2U2N 2V2N 2W2N
    1 409 403 412 14.9 15.2 15.4 8.8 8.8 8.8

    2 413 408 409 15.8 15.6 15.8 9.1 9.0 9.0

    3 412 410 410 16.1 16.0 16.1 9.3 9.2 9.2

    4 405 404 405 16.2 16.2 16.3 9.4 9.3 9.4

    5 405 404 405 16.6 16.6 16.7 9.6 9.6 9.6

    6 408 397 404 17.0 16.9 17.2 9.9 9.9 9.8

    7 410 406 404 17.8 17.6 17.7 10.2 10.1 10.1

    6. Vector Group:

    Conditions for Dyn11,

    1. 1U2n + 2n1V=1U1V
    9.3+ 402=411
    2. 1W2W<1W2V
    392>406
    3. 1V2W=1U2V
    395.8=396.7

    TESTED BY VERIFIED BY WITNESSED BY


    CLIENT : M/s. KPTCL, BALLARI
    PROJECT : M/s. GROMA INFRASTRUCTURE LTD

    PAGE No. : PRE-COMMISSIONING TEST

    Remarks:
    Test Result Found Satisfactory.

    TESTED BY VERIFIED BY WITNESSED BY

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