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33kV Dry-type Transformer Without Enclosure

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33kV Dry-type Transformer Without Enclosure Product Details:


The cast resin dry-type transformer can be supplied with or without enclosure. The cooling system can be by natural air (AN) or forced air by means of fans (ANAF).

The insulating system is designed to withstand 100 K in the middle conductor and a maximum temperature of 155℃, in accordance with class F defined in IEC 60076 standard, part 11 and GB/T 17211-1998. The most important insulation materials (e.g. insulation of the coil, winding and impregnation enamel) are of temperature class H/180°C or C/220°C. This gives the construction excellent operating reliability and also good endurance of short time overload.


The normal operating conditions are:

-  Altitude ≤1000 m.

-  Ambient temperature:

-5 ℃up to +40℃ (C1 type)

-25 ℃up to +40℃ (C1 type)


CTSS (China Transpowers Electric Co.,Limited) is renowned and appreciated by its reliable products performance and integrated services. Plenty of our products have been exported and applied in oversea markets, such as Australia, South Africa, West Africa, Middle East, Europe, South America, regarding power plant, substation, mineral and ore industries.


Ø  IEC-76 .1-1993 Power Transformers: General

Ø  IEC-60076.11-2004 Dry Type Transformers

Ø  IEC 60076-1:1993 Power Transformers – Part 1: General Amendment 1 (1999)

Ø  IEC 60076-2 Power Transformers – Part 2: Temperature Rise

Ø  IEC 60076-3 Power transformers – Part 3: Insulation Levels, Dielectric Tests And External Clearances In Air

Ø  GB1094.1.2-1996 Manufacturing Standard Of Power Transformer

Ø  GB1094.3.5-2003 Manufacturing Standard Of Power Transformer

Ø  GB/T 17211-1998 Loading Guide For Dry Type Power Transformers


Ø  Low power consumption

Ø  Low noise

Ø  Flameproof Transformer

Ø  Good resistance to short-circuits

Ø  Self-extinguishing.

Ø  Unaffected by humidity.

Ø  Minimum partial discharges.

Ø  Lower installation costs.

Ø  Low maintenance.

Ø  Pretty outline and compact structure

Ø  Suits local conditions

Ø  Easy operation


Brief specification:

Ø  Voltage class: 11kV-35kv

Ø  Capacity: 3020000kVA

Ø  Short circuit impedance: 4-4.5%

Ø  No load current: 0.2~1.8%

Ø  Losses: no-load losses is fully comply with IEC standard requirements


Typical specification:

Ø  Model: 630-35kV

Ø  Rated voltage:35kV

Ø  Rated Capacity:600kVA

Ø  Type: Three Phases, OCTC, Power Transformer


Application: 6kv, 6.3kv, 10kv, 10.5kv, 11kv,33kv,35kv, 36kV dry transformer can be used in power substation, mining and ore, hotel, department, official building, civil industry and etc.



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