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Zhejiang ERG Technology Joint Stock Co.,Ltd

Mobile: 86-18257346462

Tel: 86-576-83200088


Contacts: Wu Nick/Bella Zheng/Blanca Chen

Add: 135 Haisha Road, Shaliu Economic DevelopmentZone, Sanmen County, Zhejiang, P.R.China

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Power Transformers (National Standard Of The People's Republic Of China)-ERG
- May 05, 2018 -

Power Transformers (National Standard of the People's Republic of China)


GB l034. "2007

GB/T l7467 high voltage/low voltage prefabricated substation (GB/T l7467 1993, eqv IEC 61380:1995)

Flame test of GB/T18380.3 cables under fire conditions Part 3: Test method for the burning of electric cables or cables from Chengka (GB/T 18308-2001, IEC 60332-3:1992)

3 Terms and Definitions

The terms and definitions established in GB/T 2900.15 and the following terms apply to this section.


Dry type transformer

Cores and windings are not immersed in insulating liquid transformers.

3 2

Fully enclosed dry-type transformers totally enclosed dry-type transformer

A transformer that is cooled by internal air circulation in a pressureless, sealed enclosure.


Enclosed-type transformers enclosed dry-type transformer

A transformer that is placed in a vented enclosure and cooled by external air circulation.


Non-enclosed dry type transformers

Transformer without cooling, cooled by natural air circulation or forced air circulation.

Thank you for your kindly attention. Hope everything goes well with you.


This is Blanca Chen, from Zhejiang ERG Technology Joint Stock Co.,Ltd. We manufacturer and design transformers accessories. 

Products: (Sorry that for the e-mail not to be sent back,our catalogue and web are not attached for our first contact.)

1. All kinds of transformer cooler
2. Oil pump
3. Butterfly valve
4. Oil flow relay 
5. Control cabinet

6. Terminal box etc.
ERG join the draft of the standard for chinese government in transformers accessories, with certifications:CE, CRCC,IRIS,EUP,TS,CNAS,BV etc. 


Whatsapp/Wechat/Tel: 86 13626615457



Best Regards,

Blanca Chen