Transformer Test Set | High-Precision Protection Relay & Instrument Testing Equipment

About HAOMAI Electric

HAOMAI ELECTRIC TEST EQUIPMENT CO., LTD is a trusted subsidiary specializing in advanced electrical testing solutions. With a focus on innovation, reliability, and precision, we deliver state-of-the-art test equipment for power systems worldwide.

Engineered for Excellence

As a leading factory from China, we manufacture a comprehensive range of test sets including Instrument Transformer Testers, Protection Relay Test Systems, Power Transformer Analyzers, and IEC 61850 Testing Kits.

Our products are designed for field engineers, substations, and laboratories requiring high accuracy, portability, and durability under demanding conditions.

ISO9001 Certified Manufacturing
Global Distribution Network
High Accuracy & Reliability
Lightweight & Portable Designs

Our Top Products

Explore our premium range of test equipment designed for accuracy, durability, and ease of use in the field and laboratory.

ISO9001 3-Phase Secondary Injection Kit

Model: RELAYSTAR-806 | 18kg | Multimode Relay Testing

• All-in-one 3-phase protection relay test set
• Tests electro-mechanical, solid-state, and microprocessor relays
• Lightweight and portable

10A DC Resistance Power Transformer Test Set

6kg | 7-inch Touchscreen | Lightweight

• High-precision winding resistance measurement
• Integrated 7-inch touchscreen interface
• Ideal for field testing

HAOMAI 10A Winding Resistance Meter

Lightweight | High Accuracy | Durable

• 10A output for reliable measurements
• Compact and rugged design
• Suitable for transformers and motors

32A 300V 6-Phase Secondary Injection Test Set

Ultralight | High Accuracy | Portable

• 6-phase current injection capability
• Up to 32A output current
• Designed for modern multi-function relays

High Accuracy Six-Phase Relay Test System

Model: RELAYSTAR-H60 | 50/60Hz

• For testing all generations of protection relays
• Intelligent and portable design
• High power output and precision

44.75lb Protection Relay Test Equipment

8-inch LCD Screen | Universal Testing

• Full-featured 3-phase test system
• Large 8-inch display for easy operation
• Suitable for high-voltage substations

20.3kg 6x30A Secondary Injection Test Kit

Multifunctional | 6 Channels | 30A Output

• 6 current output channels (6x0–30A)
• Universal protection relay testing
• Compact and efficient

IEC61850 Protection Relay Testing Set

Handheld | 3-Phase | 2.7kg

• Lightweight and handheld design
• Compliant with IEC61850 standards
• Ideal for smart substation testing

View All Products

Why Choose Our Test Equipment?

High Accuracy & Reliability

Engineered for precision, our test sets deliver consistent and repeatable results, ensuring confidence in every measurement.

Lightweight & Portable

Designed for field use, our equipment is compact, lightweight, and easy to transport, reducing operator fatigue.

ISO9001 Certified Quality

Manufactured under strict ISO9001 standards, ensuring every product meets international quality and safety requirements.

Frequently Asked Questions

What types of relays can your test sets evaluate?

Our test sets are designed to evaluate electro-mechanical, solid-state, and microprocessor-based protective relays used in transmission, distribution, and industrial power systems.

Are your products suitable for field testing?

Yes, our equipment is engineered for portability and durability, making it ideal for on-site testing in substations, power plants, and industrial facilities.

Do you offer IEC61850-compliant test equipment?

Yes, we offer handheld and portable IEC61850 testing sets designed for smart substation commissioning and maintenance.

What is the warranty period for your test sets?

Standard warranty terms apply. For detailed information, please visit the official website or contact support directly.

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Precision Transformer & Relay Testing Equipment