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Precision Electrical Test Equipment for Power Systems

Trusted by engineers worldwide — high-accuracy transformer testers, relay protection kits, resistance meters, and diagnostic tools designed for safety, reliability, and efficiency in electrical maintenance and commissioning.

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10,000+

Units Sold Globally

50+ Countries

Serving International Clients

CE Certified

Quality & Safety Assured

About Run Test Electric

A leading manufacturer of advanced electrical test equipment based in China, specializing in transformer diagnostics, relay protection, and high-voltage testing solutions.

Engineered for Reliability

Run Test Electric Manufacturing Co., Ltd. is a professional electrical test equipment supplier with a mission to enhance the safety and performance of power systems worldwide. With years of industry experience, we design and manufacture precision instruments used in substations, power plants, industrial facilities, and utility networks.

Our product line includes transformer testers, relay protection test kits, winding resistance meters, SF6 gas analyzers, circuit breaker analyzers, and more — all built to meet international standards and deliver consistent, accurate results under demanding field conditions.

We are committed to innovation, quality, and customer support. Every device is rigorously tested before shipment, and our technical team provides 24-hour online assistance to ensure seamless integration into your operations.

Transformer Test Equipment Relay Protection Tester AC Hipot Generator Factory Show

Our Core Testing Solutions

Transformer Test

Relay Protection

Resistance Test

High Voltage Test

Oil Test

Circuit Breaker

Partial Discharge

Power Quality

Featured Test Equipment

High-performance, CE-certified instruments for electrical system diagnostics

10A 3 Channels Transformer Winding Resistance Tester

10A 3 Channels DC Resistance Tester

Accurate measurement of transformer winding resistance with 10A output, ideal for detecting open circuits, poor connections, and winding deformation.

  • • 10A constant current output
  • • 3 independent channels
  • • Auto-discharge function
  • • CE certified
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100A Contact Loop Resistance Tester

100A Micro-Ohm Meter

High-precision contact resistance tester for circuit breakers, disconnectors, and busbar joints using 100A DC current.

  • • 100A test current
  • • Measures down to 0.1μΩ
  • • Built-in printer
  • • Anti-interference design
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Three Phase Relay Test Kit

Three Phase Relay Test Kit

Portable secondary injection tester for overcurrent, earth fault, and distance relays. Ideal for field commissioning and maintenance.

  • • 3 voltage + 3 current outputs
  • • Touchscreen interface
  • • Automated test sequences
  • • USB & Bluetooth connectivity
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50KV VLF Hipot Tester

50kV VLF Hipot Tester

Ultra-low frequency withstand voltage tester for cables, switchgear, and transformers. Detects insulation weaknesses safely.

  • • 0.1Hz VLF output
  • • 50kV max voltage
  • • Compact & lightweight
  • • Automatic discharge
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Transformer Turns Ratio Tester

Transformer Turns Ratio Tester

Precision TTR meter for measuring voltage ratios in power and distribution transformers. Detects winding faults and core issues.

  • • 0.1% accuracy
  • • Single & three-phase testing
  • • Internal battery
  • • Data storage & export
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40A 3 Phase Winding Resistance Tester

40A 3-Phase Winding Resistance Tester

High-current DC resistance tester for large power transformers. Fast, accurate, and safe with automatic demagnetization.

  • • 40A three-phase output
  • • Simultaneous multi-winding test
  • • Auto-degaussing
  • • Thermal protection
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Oil BDV Tester

100kV Oil BDV Tester

Breakdown voltage tester for insulating oils. Ensures dielectric strength compliance in transformers and switchgear.

  • • 100kV output
  • • Auto stirring & heating
  • • 6 oil cups standard
  • • Digital control panel
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SF6 Gas Analyzer

SF6 Gas Purity Analyzer

Portable analyzer for measuring SF6 gas concentration, moisture, and decomposition byproducts in GIS and circuit breakers.

  • • Measures H2O, SO2, CO, CF4
  • • Real-time data logging
  • • Rechargeable battery
  • • Thermal printer option
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Why Choose Our Test Equipment?

Engineered for precision, durability, and ease of use in the most demanding environments.

CE Certified

All products meet international safety and performance standards.

Fast Delivery

Global shipping with fast turnaround from our Hebei facility.

24/7 Support

Technical assistance available anytime via email and WhatsApp.

Free Calibration

Each unit is factory-calibrated for guaranteed accuracy.

100+
Product Models
50+
Countries Served
15+
Years Experience
99.3%
Customer Satisfaction

Frequently Asked Questions

What is a transformer turns ratio (TTR) tester used for?

A TTR tester measures the voltage ratio between primary and secondary windings of a transformer to detect winding faults, shorted turns, or incorrect tap settings.

Can your relay test kits test digital protection relays?

Yes, our six-phase and three-phase relay test kits are fully compatible with modern microprocessor-based protection relays, including differential, distance, and auto-reclosing relays.

Do you offer OEM/ODM services?

Yes, we provide customized branding, packaging, and software modifications for bulk orders.

How long is the warranty period?

All our test equipment comes with a standard 2-year warranty covering parts and labor.

Is training available for your equipment?

Yes, we offer free online training sessions and detailed user manuals in multiple languages.

Get in Touch

Have questions about our test equipment? Reach out through our official website.

Visit Official Website to Contact

Email: [email protected]

WhatsApp: +86 18500313863

Phone: 0086-312-3066265

Address: Building 4, Dongrun Science Park, High-Tech Zone, Baoding, Hebei, China

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