Automatic Step Voltage Regulator
Series Compensation Device
Mobile Prefabricated Substation
ADVANCED TECHNOLOGY

Shaanxi Sefon Electrical Equipment Co., Ltd. (hereinafter referred to as SEFON) is a high-tech enterprise integrating research and development, design, production, sales, service and power engineering total contract. The company has strict quality control, strong technical foundation, advanced production equipment, superb manufacturing technology, rich project experience and perfect service supporting.

CERTIFICATES

In recent years, on the basis of learning from advanced technology at home and abroad, the technology research and development team independently researched and developed, and made significant technical progress in major products such as special power equipment and power quality equipment, and obtained more than 40 national patents.

VARIOUS PRODUCTS

Our company mainly produces 35 kV level and below oil-immersed transformers, dry transformers, special transformers, dry core series reactors, high and low voltage switchgear, box-type substation, prefabricated cabin and power quality management products.

AFTERSALE SERVICE

Shaanxi Sefon Electrical Equipment Co., Ltd. has always been adhering to the service concept of "customer first", and has always taken scientific and technological innovation, efficient operation, strict quality control and careful customer service as a major part of enterprise development.

About us
15Years ofExperience

Shaanxi Sefon Electrical Equipment Co.,Ltd.

Shaanxi Sefon Electrical Equipment Co., Ltd. (referred to as Sefon), established in 2009, is a high-tech enterprise integrating research and development, design, production, sales, service, and power engineering general contracting.

  • Automatic step voltage regulator series
  • Reactive power automatic compensation series
  • Transformer series
  • High and low voltage switchgear
  • Prefabricated substation
  • Mobile prefabricated substation
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hot sell
Hot Products
10kV Series Compensation Device
10kV Series Compensation Device

The main functions of the 10KV distribution network connection compensation device are to improve the voltage...

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10kV YBM Prefabricated Substation
10kV YBM Prefabricated Substation

YBM -12/0.4 prefabricated substation is an outdoor independent complete set of power distribution equipment composed...

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Automatic Step Voltage Regulator(SVR)
Automatic Step Voltage Regulator(SVR)

The SVR line automatic pressure regulator can automatically adjust the gear with the load connection and switch...

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12kV Skid-Mounted Substation
12kV Skid-Mounted Substation

A skid-mounted substation is a complete outdoor substation prefabricated and assembled in the factory; it includes a...

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10kV Mobile Prefabricated Substation
10kV Mobile Prefabricated Substation

The main function of the prefabricated cabin substation (container-type substation) is to convert the low-voltage AC...

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Secondary Protection Vehicle
Secondary Protection Vehicle

Product Overview 35kv series vehicle-mounted mobile substation (20kv-30kv-33kv-35kv) is a combined substation...

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Main Transformer Vehicle M-T-110
Main Transformer Vehicle M-T-110

Product Overview 35kv series vehicle-mounted mobile substation (20kv-30kv-33kv-35kv) is a combined substation...

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33KV Single-phase Voltage Regulator
33KV Single-phase Voltage Regulator

SEFON Single phase voltage regulator:
1.Single phase voltage regulator is a device that maintains a stable...

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22KV Single-phase Voltage Regulator
22KV Single-phase Voltage Regulator

SEFON Single phase voltage regulator:
1.Single phase voltage regulator is a device that maintains a stable...

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40+

National patent

2009

Company establishment

8000㎡+

Plant area

+86 18629268118

Our company has always been adhering to the service concept of "customer first", and has always taken scientific and technological innovation, efficient operation, strict quality control and careful customer service as a major part of enterprise development.

Contact us

Visting our company online?

We have factory vr display, you can contact our staff to learn more about our production qualification and equipment conditions

Certificate

Latest Case

case 01

SVQR Voltage regulated automatic reactive power compensation device

110kV Gaozhen Substation
Regulator Model: SVQR-3000/10.5-9

case 02

Automatic step voltage regulator

Export voltage regulator to Laos
SVR-10000/24-14 (0~+39%)

case 03

Automatic step voltage regulator

Export voltage regulator to Laos
SVR-10000/24-14 (0~+39%)

case 03

Xinjiang 10kV Prefabricated substation

case 03

Box Type Substation

Pu Ge Battlement, ancient county, Linfen, Shanxi
YBM-12/0.4-1250

case 03

DWK Column automatic reactive power compensation device

Xinjiang Changji Hui Autonomous prefecture power supply company
DWK-12-3/600

case 03

Box Type Substation

Sichuan Dazhou city Xuanhan county stone grinding beam
YBW-6300/35/10

Latest News
What Information Should You Provide When Ordering A Three-Phase Voltage Regul...

Nov 05, 2026

What Information Should You Provide When Ordering A Three-Phase Voltage Regul...

Learn what technical specifications to provide when ordering a three-phase volt...

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How Three-Phase Voltage Regulators Protect Industrial Equipment

Nov 03, 2026

How Three-Phase Voltage Regulators Protect Industrial Equipment

Learn how three-phase voltage regulators protect industrial equipment from volt...

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What Factors Affect Step Voltage Regulator Price? A Buyer's Guide

Nov 02, 2026

What Factors Affect Step Voltage Regulator Price? A Buyer's Guide

A step voltage regulator (SVR) has no single list price — the quote is the sum ...

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How Automatic Voltage Regulation Improves Power Quality in Three-Phase Systems

Oct 30, 2026

How Automatic Voltage Regulation Improves Power Quality in Three-Phase Systems

Discover how automatic voltage regulation improves power quality in three-phase...

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How Does A Three-Phase Voltage Regulator Work?

Oct 26, 2026

How Does A Three-Phase Voltage Regulator Work?

Discover how a three-phase voltage regulator monitors input voltage, corrects v...

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Contact with us
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Sefon Electrical Equipment Company integrates the production and sales of complete sets of electric power equipment, the general contract construction, installation and construction of electric power engineering, the operation and trustement of electric power after-sales, overhaul and maintenance as a whole and comprehensive electric power engineering service enterprise. To provide you with factory price, satisfactory service and timely delivery, we look forward to your contact.