TRANSFORMER SPECIFICATION REFERENCE

IS 2026 [PART I, II & IV]-1977 & [PART III] -1981

GUARANTEED MAXIMUM TEMPERATURE RISE OF OIL - 45°C, WINDING - 55°C

WINDING IMPULSE TEST

VOLTAGE kV peak POWER FREQUENCY TEST

VOLTAGE kV rms

VECTOR DIAGRAM

HV LV

HV LINE 350 140

HV NEUTRAL 95 38

LV 75 28

BUSHING CURRENT TRANSFORMERS CONFORMING TO IS 2705: [PARTS I ~ IV] - 1981

CIRCUIT SECONDARY TERMINALS

RATIO VA ACCURACY

CLASS A.L.P

MINIMUM KNEE POINT

VOLTAGE Vk

[ VOLTS ]

MAXIMUM MAGNETIZING

CURRENT AT Vk [ mA ]

MAXIMUM SEC. WINDING RESISTANCE

AT 75°C

[ OHMS ]

HV NEUTRAL

1NS1-1NS2 100/1 30 10P 10 250 600 1.0

LV LINE 2VS1-2VS2 473/2 − 3.0 − − − −

TYPE SOCR FORM 3NYC

kVA HV 9000 TYPE OF COOLING ONAN

LV 9000 IMPEDANCE VOLTAGE (9.0 MVA BASE RATED TAP)

9.12 %

VOLT (AT NO-LOAD)

HV 66000 CONNECTION SYMBOLS YNd1

LV 11000 MASS OF CORE & WINDING kg 9800

AMPERE HV 78.8 MASS OF OIL kg 4500

LV 473 TOTAL MASS kg 20000

NO. OF PHASES 3 MASS OF HEAVIEST PACKAGE kg 16500

FREQUENCY 50 Hz UNTANKING MASS kg 9300

DIAGRAM DRG. NO. TK 204580 UNTANKING HEIGHT mm 4350

MAKER’S SER. NO. 110088-1 VOLUME OF OIL L 5060

YEAR OF MANUFACTURE 1990

HV OFF-CIRCUIT TAP CHANGER TAP SELECTOR CONNECTION

POSITION CONNECTION HV LINE TERMINALS

VOLT % VOLT AMPERE

1 4-5 107.5 70950 73.3

2 4-6 105.0 69300 75.1

3 3-6 102.5 67650 76.9

4 3-7 100.0 66000 78.8

1NS21NS1

1U

1V 2V

1N

2W

2U

1W

3

45

67

3

4

5

67

3

4

567

1.2

1.2

1.2

2.1

2.1

2.12.2

2.2

2.2

2VS12VS2

1.1

1.1

1.1