Shanghai, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Electrical & Electronics, Industrial Equipment & Components, Manufacturing & Processing ...
Management System Certification:
ISO 9001, ISO 14001
OEM/ODM Service
Sample Available

Isolation Transformer, Auto Transformer, Low Voltage Transformer manufacturer / supplier in China, offering Low Voltage Isolation Transformer Auto Transformer K Rate Dry Transformer, Single Phase Static Voltage Stabilizer, Outdoor Digital Servo Voltage Stabilizer and so on.

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Supplier Homepage Products Transformer Low Voltage Isolation Transformer Auto Transformer K Rate Dry Transformer

Low Voltage Isolation Transformer Auto Transformer K Rate Dry Transformer

Get Latest Price
Min. Order / Reference FOB Price
1 Piece US $100-5,000/ Piece
Port: Shanghai, China
Transport Package: Wooden Box
Payment Terms: L/C, T/T
Application: Power, Electronic, Instrument, Lighting, Rectifier, Audio
Phase: Three
Core: Core-type Transformer
Cooling Method: Dry-type Transformer
Winding Type: Separated Winding Transformer
Certification: ISO9001-2000, CCC

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Basic Info

Model NO.
Single-phase Transformer, Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer, Isolation Transformer
Frequency Characteristics
Power Frequency
Shape of Core
1kVA to 3000kVA
Shanghai, China
 1. Galvanic isolation between the stabilizer and the main power supply
 2. Change the voltage grade
Improve the balance of the phase voltage and provide a steady neutral point.
Protection from voltage surge and cancel the triplen harmonics. 


Capacity 1KVA-3000KVA
Voltage Grade<= AC1140V
Input Voltage rangeRated voltage ±10%
Output VoltageRated voltage ±3% when input voltage is at the rated voltage.
Frequency50Hz or 60Hz
Dielectric Strength3500V / 10mA / 60s
Loading capabilityWhen the transformer is 100% loaded, it can take 3 times current in short time. 
Insulation≥100MΩ ( DC 500V )
Insulation GradeF
Working Temperature-15°C--+45°C
Temperature increase<100K

Successful Projects:
CustomerProductSolution for the problem
Feb.2018SiemensAVR/Transformer 800kVARegulate the voltage for the product testing in Siemens factory of frequency converter.
Feb. 2018GEAVR 200kVA;
Isolation transformer 150kVA, 100kVA
Provide stable power For GE medical equipment in Philippines
Jan.2018SiemensCombined unit of AVR and Transformer 200kVA;
Isolation transformer 150kVA, 100kVA
Provide stable power for Siemens medical equipment in Philippine
2011 to nowElekta
(famous medical equipment company from Sweden)
150kVA Digital Static AVR

120pcs per year.
Stabilize the voltage for their medical equipment.
Oct. 2017Borgwarner OptiV Plus voltage optimizer / stabilizer 
2500kVA, 2pcs
To provide stable voltage to the production line and save energy
2013CRRCAir cooling Automatic voltage regulator 800kVARegulate and stabilize the voltage for production and testing for China High Speed Trains
Dec.2014China National Chemical Engineering Co.Ltd.OptiV Plus voltage optimizer / stabilizer 
2500kVA, 2pcs
This is to provide safe and stable voltage for projects to destroy the Japanese chemical weapons left during World War II. Save the energy cost.
June. 2014Shanghai YunyangOptiV MAX voltage stabilizer
  1250kVA, 2pcs
Stabilize the power for the stadium.Save the energy cost.  
June 2014McQuay InternationalOptiV Plus voltage regulator / optimizer 
2500kVA , 1pc
Regulate the voltages for the production of air conditioners. Drop the voltages to 380V, Save the energy cost.
2013China ZSHDSmart Static AVR combined with Isolation Transformer.
200kVA, 300kVA
Regulate voltage for production of chemical products.
June 2013OKUMA
Air cooling AVR 100kVARegulate input voltage for OKUMA Numerical Control Machine
2014Befficient (Australia)Smart control AVR 150kVA, 200kVA, 400kVAOptimize the voltages for the customers for energy saving.

Product Details

Low Voltage Isolation Transformer Auto Transformer K Rate Dry Transformer
Low Voltage Isolation Transformer Auto Transformer K Rate Dry Transformer
Low Voltage Isolation Transformer Auto Transformer K Rate Dry Transformer
Low Voltage Isolation Transformer Auto Transformer K Rate Dry Transformer

Company Profile:

Founded in 1983, GridStone Electric is a leading manufacturer of automatic voltage stabilizer and transformer. The products currently include digital static voltage stabilizer, digital servo voltage optimizer, power factor correction units, LV and MV transformers and reactors, UPS, Variable Frequency Power Source, Oil Immersed Induction Voltage Regulator. Thanks to over 30 years in the business and on going technical research, GridStone have become a competitive high-tech company, and meet the requirements of a constantly growing number of customers through design, production and service.

Besides standard production, GridStone is flexible and strong at custom design and production according to the customers' specification. Expert training and technical support are available to serve the customers quickly and professionally.

GridStone factories are ISO9001 and ISO14001 certified.

Our History
1983, GridStone factory for automatic voltage stabilizer was started, and th  first servo voltage stabilizer in
          China was successfully produced.

1985. Gridstone factory for transformer was started
1998. New office and factory of voltage stabilizer were started in Shanghai,China.
2002. The first static voltage stabilizer was released, and massive production started at end of the year.
2008. Brand name "Shanghai Voltage Regulator" was started in China.
2009. New types digital voltage stabilizers were released. These new products are more fast, more reliable
          and more intelligent.

2010. The first frequency and voltage regulator with IGBT is released.
2014. New factory for transformer was started.
2016. GridStone brand name is started to be used for all voltage stabilizers and transformers to be sold

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