0.4 to 10 KV Step Up three phase oil immersed electric power industrial transformer

0.4 to 10 KV Step Up three phase oil immersed electric power industrial transformer

25 years history manufacturer
Annual sales are up to USD 5 million
100% IQC testing before shipment
Passed SGS, ISO9001:2008, ISO14001, OHAS18001, 3C certificate
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Product Details

1. 0.4 to 10 KV Step Up three phase oil immersed electric power industrial transformer

0.4 to10kv step up three phase oil immersed Power transformer is rated voltage during 6-35kV, oil immersed transformer are most used in power plant,power grid transmission and distribution station,industry& commerce electrical substation as the electrical equipment of power transmission,

(1),Natural cooling or force air or oil cooling,

(2),Two windings or three windings

(3),On-load or no-load voltage tapping changer

(4),capacity range 10-5000kVA


2.  Parameter list

Rated Capacity 

10~2500 KVA

Vector Group

Yyn0 or Dyn11

Impedance Voltage

4%, 4.5%



Rated voltage H. V

11, 10.5, 10, 6.3, 6KV (or customized)

Rated voltage L.V

0.4, 0.69KV (or customized)

Cooling method



≤1, 000m 

Tapping range

+/- 5% or +/- 2 * 2.5% (or customized)

Temperature rise limits

Winding ≤ 65K, Top oil ≤ 60K

Highest ambient temperature


Lowest temperature


Product standard

IEC60076 & GB1094 and GB/T6451


2 years

3. Product standard

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.
4. Routine test

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.

5. Factory show


6. FAQ

(1). How to order?

A: Send the inquiry with your technical data or tell me your application. We can make recommendation. 

(2). What is lead time and shipment?

A: Shipment term is FOB, CIF,DDU, DDP, CIP. Lead time of products is 3-10 days, if special need, L/T is discussed case by case.

(3).How to pay?

A: By T/T, L/C, cash, PayPal, western union, D/P, D/A and others available

(4).What is Warranty?

A: At least two years promise, some products can extend longer.

7. Contact us

XIGAO Electricenergy Group Co.,LTD.

Add.: No. 6, Weibei Industrial Park, Xi'an City, Shaanxi Pro., CN. 710600 

Phone: 0086 13484807604

Email: victoria@zgxgdn.com

WhatsApp: 0086 13484807604

Wechat: 0086 13484807604

Website:  www.zgxgdn.cn