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66kV Oil-immersed Power Transformer

Location:
Shanghai, China ( Mainland)
Status:
New
Sample Availibility:
yes
Payment Terms:
Cash, Bank Transfer, Letter of Credit, T/T, L/C
Categories:
Home > Electronics & Electrical > Transformers

Product Description

REFERENCES

ISO 1461: Hot dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods.

IEC 60076: Power transformers.

IEC 60044: Instrument transformers.

IEC 60296: Specification for unused mineral insulating oil for transformers and switchgear.

IEC 60354: Loading guide for oil – immersed power transformers.

IEC 60214: Tap-changers - Part 1: Performance requirements and test methods, Part 2: Application guide.

IEC 60512: Connectors for electronic equipment.

Performance

66kV Two-Winding Power Transformer With NVTC/OLTC
Rated Capacity (kVA)Rated Voltage (kV)Vector GroupLosses (W)

Impedance Voltage

(%)

HVTapping RangeLVNo loadOn load
63063 66 69±5%6.3 6.6 10.5 11Yd11136075608.0
80016208830
1000192010440
1250226012340
1600272014850
2000320017550
2500376020700
3150YNd11448024300
4000528028800
5000624032400
6300±2×2.5%8000360009.0
8000960042750
100001136050400
125001336059850
160001608073530
200001904089100
2500022480105300
3150026720126900
4000032000148950
5000037760184500
6300044880222300

INSULATION LEVELS

Nominal system voltage

(kV, rms)

Highest system voltage

(kV, rms)

Lightning Impulse withstand voltage, dry

(kV, peak)

Power frequency withstand voltage, wet

(kV, rms)

33

36

200

95

132

145

650/750 (internal/external)

275/325 (internal/external)

AUXILIARY SUPPLIES

Equipment generally rated for the following auxiliary power supplies:

(a) Cooler control circuits: 220V, 240 V, single phase, 50Hz

(b) Tap changer control: 220V, 240 V, single phase, 50Hz

(c) Cooling fan motors: 380V, 415 V, three phase, 50Hz

(d) Tap changer motor: 380V, 415 V, three phase, 50Hz

ROUTINE TEST to IEC 60076 (to be done during acceptance testing at factory)

• Measurement of winding resistance

• Ratio test

• Vector group

• Separate source voltage withstand test

• Induced over-voltage

• Insulation resistance

• Oil leakage test on fully assembled transformer for 12 hours

• Measurement of impedance voltage

• Magnetic balance

• Measurement of no-load loss and current

• Measurement of load loss (at normal & extreme taps)

• Tests on on-load tap-changer

• Tests on on-load tap-changer remote control panel

• Efficiency at 50%, 75%, 100% loading at unity p.f and rated terminal voltage (Corrected to 75C)

• Lightning impulse withstand test

Type Tests to IEC 60076 (to be done during acceptance testing at factory)

• Temperature rise test – To be performed on one unit during acceptance testing.

Lightning Impulse Withstand Test is already listed under Routine Tests as per IEC 60076.

Test Facility



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Contact Information

Company:
 Shanghai First Electrical Group Co., Ltd.
Phone Number:
  86-21-64325567
Fax Number:
 86-21-64325822
 
Shanghai First Electrical Group Co., Ltd.
 Shanghai , China FREE
 

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