IT57 250kva single-ring 480v 277v auto transformer

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US $1-20 / Pieces | 1 Piece/Pieces auto isolation transformer (Min. Order)
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Quick Details
Place of Origin:
Zhejiang, China (Mainland)
Brand Name:
Model Number:
Coil Structure:
Coil Number:
IEC60076, GB1094-1996; JB/T10088-2004; GB/T6451-2008; EQV
Transformer type:
Isolation transformer
Primary voltage:
Customized/AC 110V,115V, 120V,127V,220V,230V, 240V etc
Secondary voltage:
Customized/AC 12V,24V,36V,48V,120V,240V etc.
Rated capacity:
10 VA
50Hz or 60Hz
Best price & Best quality in China
Product type:
auto isolation transformer
Supply Ability
Supply Ability:
350000 Piece/Pieces per Month auto isolation transformer
Packaging & Delivery
Packaging Details
auto isolation transformer
1)1 plastic bag/set,1 wooden case/set
2)Special package required by clients.
Ningbo, Shanghai, Wenzhou

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Product Description

IT57 250kva single-ring 480v 277v auto transformer              auto isolation transformer  


BK series machine tool control transformer is suitable for circuit of 50~60Hz, voltage up to 500V, usually applied as power supply for machine tool electrical appliances, local lightings and indicator lamps. 
1.Input voltage: rated voltage ±10% 
2.Output voltage: rated voltage +5% (no load) 
3.Efficiency: ≥95% 
4.Waveform distortion: no additional waveform distortion 
5.Function: indication of input voltage, output voltage and current. 
6.Protection: over-current protection 
7.Can operate itself without anybody attending for a long term 
8.Insulation resistance: ≥50MΩ 
9.Electric strength: no breakdown or flashover phenomenon under power frequency sine voltage of 2000V for 1min 
10.Overload capability: for 1min under two times of rated current 

 auto isolation transformer  
Working conditions:
1.Ambient temperature: -15°C~+40°C 
2.Altitude: <1000m 
3.Relative humidity: <90% 
4.Environment exists without gas, steam, chemical deposition, dust or dirt that will affect transformer’s insulation seriously, also explosive or corrosive medium is not allowed. 
5.If any special working conditions that are not in line with the above stipulations, user shall negotiate with us.  auto isolation transformer  


Different kinds of transformers from us:  


Our Services

 Trade terms:    

1.Payment: 1) 30% in advance, balanced 70% to be paid before dispatch.   2)L/C                                           

2.Port of loading: Ningbo,Wenzhou or Shanghai Port
3.Discounts: offered based on order quantities
4.Delivery time: 3-10 days according to order quantities. 

 auto isolation transformer    

Feedback:    transformer toys with copper

       We WARMLY appreciate your positive feedback. We value our customers so much.If you have any problem, PLEASE FEEL FREE and DON'T HESITATE TO CONTACT US BY EMAIL IMMEDIATEDLY, we are always there to offer help.  

 auto isolation transformer   


Why Us? 

1. Quality assurance: All the products will go through lots of tests carefully before dispatch: Raw material check, Winding test, Assemble test, Painting check, Nameplate check and routine tests.

2. Competitive production capacitymonthly production more than 35000 sets.

3. Manufactuer's priceFactory direct sale, most competitive price in China.

 auto isolation transformer  

Company Information

Our company:    

        Our transformers sell well all over the world, and are exported to Europe, Ethiopia, Malaysia, Thailand, Kenya, Mozambique, Congo, Rwanda, Pakistan, South Africa and so on. We have won a good reputation among customers at home and abroad. We will do our best to provide more high-quality products and services for you in the future!  auto isolation transformer     


Packaging & Shipping


Welcome to contact us for more details:    transformer toys with copper

ATTN: Power 

Yueqing Abbeycon Electric Co., Ltd. 

Tel: 0086-577-89008222  (24 hours' service)

Skype: cccmtth 

E-mail: power(at)

 auto isolation transformer  

(Main products: isolation transformer, control transformer, 220v single transformer, 230v 380v three phase transformer, BK,JBK,SG,Machine tool control transformer, 100va,200va,315va,400va,500va,800va,900va,1000va,2000va transformer)