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Pioneering Innovation in Power Testing Equipment

Wuhan Longdian Electrical Equipment Co., Ltd. has been at the forefront of high-voltage and power testing solutions since 2007. With over 18 years of experience, we deliver intelligent, reliable, and customized testing systems trusted by utilities and industries worldwide.

18+

Years Experience

100+

Global Clients

50+

Products

High Voltage Testing Equipment

Who We Are

Wuhan Longdian Electrical Equipment Co., Ltd. was established in 2007 and is located in Wuhan Donghu New Technology Development Zone, a national high-tech development zone. We are a leading manufacturer and service provider of power testing equipment, integrating research and development, production, and sales.

Our mission is to pioneer innovation and create a smart future for power system diagnostics. We focus on developing intelligent, digital, and sustainable testing solutions that ensure the safety, reliability, and efficiency of electrical infrastructure.

Innovate

Driven by technology introduction and independent R&D to advance industrial testing capabilities.

Customized

Provide forward-looking, tailored testing equipment to meet unique customer requirements.

Service

Committed to lean manufacturing and continuously meeting customer needs with responsive support.

Factory Interior Engineering Team Testing Lab Product Assembly

Our Products

Comprehensive Power Testing Equipment for Modern Grids

GKC-G2 High Voltage Switch Tester

GKC-G2

High Voltage Switch Characteristic Tester

Advanced device for measuring mechanical and electrical characteristics of high-voltage circuit breakers. Features intelligent analysis and data storage.

LDBBZ-1000B Transformer Tester

LDBBZ-1000B

Portable Transformer Turn Ratio Tester

Compact and accurate instrument for measuring transformer turns ratio, phase deviation, and winding polarity. Ideal for field testing.

LDJB-702 Relay Tester

LDJB-702

3 Phases Relay & Protection Tester

Full-featured protection relay test set with high precision output, suitable for testing all types of electromechanical, solid-state, and digital relays.

LDFA-106A CT/PT Tester

LDFA-106A

CT/PT Analyzer

Automated transformer analyzer for current and potential transformers. Performs ratio, polarity, accuracy class, and saturation curve tests.

LD-2003 Cable Fault Tester

LD-2003

Cable Fault Locator

Integrated system for detecting, tracing, and pinpointing faults in power cables. Combines high-voltage surge generation with precise location methods.

Insulation Resistance Tester

IR Series

Insulation Resistance Tester

High-voltage megohmmeter for measuring insulation resistance in cables, motors, and transformers. Multiple test voltages and automatic discharge.

Partial Discharge Tester

PD-8000

Partial Discharge Tester

Detects and analyzes partial discharges in high-voltage equipment. Features phase-resolved partial discharge (PRPD) pattern analysis.

Ground Resistance Tester

GR-300

Ground Resistance Tester

Measures earth resistance using 3-pole and 4-pole methods. Also measures soil resistivity and continuity. Compact and rugged design.

Battery Tester

BT-200

Battery Impedance Tester

Evaluates the health of valve-regulated lead-acid (VRLA) and flooded batteries. Measures internal resistance, voltage, and temperature.

SF6 Gas Analyzer

GA-500

SF6 Gas Purity Analyzer

Measures SF6 concentration, moisture content, and decomposition byproducts in gas-insulated switchgear (GIS). Ensures safe and efficient operation.

Why Choose Longdian Electric?

We deliver intelligent, reliable, and future-ready power testing solutions

Intelligent Testing

Our devices feature smart algorithms, auto-detection, and AI-assisted diagnostics for faster and more accurate results.

Data Upload & Cloud

Seamless integration with cloud platforms for real-time data sharing, remote monitoring, and centralized reporting.

Custom Solutions

We design and manufacture customized test systems tailored to your specific voltage levels, protocols, and environments.

High Reliability

Engineered for harsh field conditions with robust enclosures, EMI protection, and long-term stability.

18+

Years in Industry

50+

Products Developed

100+

Clients Worldwide

99.8%

Customer Satisfaction

Featured Projects

Real-world applications of our testing systems

Smart Substation Project

Smart Substation in Guangdong

Deployed GKC-G2 and LDJB-702 systems for comprehensive switchgear and relay testing during commissioning.

Railway Power System

High-Speed Railway Network

Supplied cable fault locators and insulation testers for preventive maintenance across 500+ km of track.

Industrial Plant Upgrade

Steel Plant Electrical Upgrade

Customized partial discharge and transformer testing systems installed for predictive maintenance.

Latest News & Technology

Stay updated with our innovations and industry insights

Technology • March 10, 2025

Customized HV Switch Test System

Wuhan Longdian Electric delivers tailored high-voltage switch test solutions for complex grid environments.

Technology • February 24, 2025

GKC-HAJ-MH AC/DC Test System

Introducing our intelligent solution for high-voltage circuit breaker testing with running-in capabilities.

Technology • February 6, 2025

Digitalization of HV Switch Testing

Longdian Electric leads the new era of digital dynamic characteristics testing with cloud integration.

Get in Touch

For product inquiries, technical support, or custom solutions, visit our official website to contact Wuhan Longdian Electric.

400-6727-238
cnehv.com

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