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อังกฤษ, ภาษาอังกฤษ

การทดสอบการป้องกันรีเลย์

Voltage designs and manufactures industrial-grade relay protection tester series engineered for the most demanding power system environments. Our flagship three-phase and advanced six-phase secondary injection test kits combine rugged field portability with laboratory-grade precision to deliver unmatched testing efficiency.

Core Selling Points & Product Advantages:

  • High-Precision Linear Amplifiers: Equipped with independent, high-fidelity linear power amplifiers to ensure pure, zero-distortion current and voltage waveform outputs, even during maximum load testing.

  • Fully Automated Software Platform: Built-in Windows-based intelligent testing software allows for one-click fault simulation, automated state sequences, and instant Excel/PDF test report generation.

  • IEC 61850 Smart Grid Readiness: Our 6-phase testers fully support digital substation testing, including high-speed GOOSE message publishing/subscribing and Sampled Value (SV) outputs.

  • GPS/IRIG-B Dual-Ended Synchronization: Supports high-precision satellite time synchronization for complex end-to-end (E2E) line differential protection testing across long distances.

  • Industrial-Grade Hardware Reliability: Features a built-in industrial PC with a large color display, reinforced shock-absorption housing, and intelligent thermal overload protection for reliable field use.

Contact Our Engineers Today to Get Factory-Direct Pricing & Detailed Technical Datasheets! 

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What Is a Relay Protection Tester?

เอ เครื่องทดสอบระบบป้องกันรีเลย์ is engineered to verify the performance, accuracy, and reliability of protection relays used in electrical power systems. Our advanced product range includes single-phase, three-phase, and six-phase relay testers designed for commissioning, routine maintenance, and troubleshooting applications in high-voltage environments.

As a leading protection relay tester manufacturer, our equipment can accurately simulate voltage, current, frequency, and complex fault conditions to evaluate relay operation under real-world scenarios. This professional-grade secondary injection relay tester series ensures the safety and stability of power grids worldwide.

Our เครื่องทดสอบรีเลย์ systems are widely utilized by:

  • Power utilities and grid corporations

  • Electrical substations (GIS & conventional)

  • Transformer & switchgear manufacturers

  • Industrial plants & large manufacturing facilities

  • Renewable energy projects (Wind & Solar)

  • Electrical testing and calibration laboratories

Whether you need a lightweight portable relay tester for field service or an advanced microcomputer relay tester for complex protection schemes, we provide reliable, microprocessor-based solutions for modern power system testing.

การทดสอบการป้องกันรีเลย์: Key Features and Tests​

เอ เครื่องทดสอบระบบป้องกันรีเลย์ creates simulated system faults (such as overcurrent, undercurrent, overvoltage, undervoltage, etc.) and checks how the relay reacts to these conditions. The main goal is to ensure the relay works correctly, coordinates with other protection devices, and responds effectively to faults.​​

1. Fault Simulation​

The tester can replicate any types of wrong doings like a short circuit, excessive voltage, and too low current. It is creating exact fault current and voltage to checking the reaction of the relay.​

2. Multi-phase Testing​

Most electrical systems use three-phase power, so most testers support multi-phase testing. This is vital for checking relays that protect three-phase systems.​

3. Accuracy and Precision​

Relay testers should use high precision to measure voltage, current, and timing. These accurate values are important for the relays to work, and therefore, the tester's output must be adequate to reproduce real fault conditions without exception.​

4. Testing Different Relay Types​

These testers work with various relay types, including overcurrent relays, distance relays, and differential relays. They can test both traditional electromagnetic relays and modern digital relays.​

5. Automation​

Modern relay testers often use software to automate testing. This software generates detailed reports showing the relay’s response times, tripping behavior, and other performance data.​

Types of Tests Performed​

1. Functional Tests​

We check if the relay reacts to faults as expected and if settings like current or voltage thresholds are correctly configured.​

2. Timing Tests​

We ensure the relay trips within the correct time limit when a fault occurs.​

3. Burden Tests​

We measure how the relay operates under different load conditions.​

4. Coordination Tests​

We ensure relays work together properly in a protection system—for example, making sure downstream relays use time-delayed tripping to avoid unnecessary power outages.​

5. Accuracy Tests​

We verify the relay’s sensitivity and accuracy in detecting fault conditions.​
In actual utilization, the relay protection testers are of vital importance as they are involved in putting, maintaining, and solving relay protective problems in power systems. They assist in the prevention of system failures, and thus in the equipment safety, that the protection system should provide according to the design is not compromised.

Types of Protection Relay Testers We Offer

Three Phase Protection Relay Tester

Our three phase protection relay tester is the industry standard for comprehensive secondary injection testing in power utilities and substations. Engineered with 4-phase voltage and 3-phase current outputs, it provides high-precision waveforms with zero distortion, making it the most versatile and cost-effective tool for regular power grid maintenance.

  • Key Capabilities: Effortlessly tests a wide variety of modern and legacy relays, including distance protection, overcurrent relays, directional relays, under/overfrequency relays, inverse time relays, and auto-reclosing schemes.

  • Core Advantages: Features an integrated large-screen color display and a built-in industrial PC, allowing engineers to conduct fully automated testing on-site without needing an external laptop. Equipped with strong overload protection and intelligent thermal management.

  • Software Automation: Supports advanced automated test modules, state sequence testing, and automatic generation of professional PDF test reports.

Six Phase Protection Relay Tester

For complex protection schemes and smart substations, our เครื่องทดสอบรีเลย์ป้องกันหกเฟส offers the ultimate performance in digital and analog secondary injection. By providing 6-phase current and 6-phase voltage outputs simultaneously, it can easily perform complex line differential protection testing and structural simulated grid fault tests without any wiring changes.

  • Key Capabilities: Specifically designed for complex protection schemes such as transformer differential protection, busbar differential protection, generator protection, and multi-circuit line protection.

  • Core Advantages: Employs high-fidelity linear power amplifiers to ensure precise output even at high currents. It supports high-precision time synchronization via built-in GPS and IRIG-B, allowing end-to-end (dual-ended) synchronous testing for long-distance transmission lines.

  • Digital & Smart Grid Readiness: Fully compatible with international smart substation standards. It supports IEC 61850 testing capabilities, including GOOSE message publishing/subscribing and Sampled Value (SV) outputs to test modern IEDs (Intelligent Electronic Devices).

Three Phase vs. Six Phase Protection Relay Tester Comparison Guide

Comparison Feature Three Phase Relay Tester  Six Phase Relay Tester 

Current Output Channels

 3 Channels 6 Channels

Voltage Output Channels

 4 Channels (4x120V / 4x300V) 6 Channels or 9 Channels (6x120V / 6x300V)

Primary Target Applications

• Regular substation maintenance


• Distribution network testing


• Overcurrent & voltage relays


• Distance & directional protection


• Auto-reclosing schemes

• Complex protection schemes


• Transformer differential protection


• Busbar protection / Generator protection


• Multi-circuit line protection


• Smart substation testing

IEC 61850 Smart Grid Ready

 Optional / Basic simulation Fully Integrated (Supports GOOSE publishing/subscribing & Sampled Value outputs)

Differential Protection Testing

 Requires manual rewiring or switching phases to test all winding sides. Completely Automated. Can inject currents into both high and low voltage sides simultaneously without changing wires.

End-to-End (E2E) Testing

 Supported via basic GPS synchronization. Advanced High-Precision Synchronization via built-in GPS/IRIG-B for long-distance line differential relays.

Hardware Weight & Portability

 Highly portable, lighter weight, ideal for frequent field service and quick on-site testing. Slightly heavier due to more power amplifier modules, designed for heavy-duty and advanced engineering.
Best For Electrical contractors, industrial factories, and medium-voltage distribution maintenance teams. Power utilities, national grid corporations, high-voltage substations, and professional testing laboratories.

Field Applications of Relay Tester Equipment

Our industrial-grade protection relay tester series is built to perform across various demanding environments in the power sector. These systems are essential for:

  • Substation Commissioning: Ensuring all newly installed protective relays, trip circuits, and interlocking schemes operate exactly as designed before the substation goes live.

  • Routine Preventive Maintenance: Regularly verifying older electromagnetic relays and modern numerical relays to prevent catastrophic "mis-operation" or "failure to trip" during real power grid faults.

  • Transformer Differential Protection Testing: Utilizing the เครื่องทดสอบรีเลย์หกเฟส to inject currents into both high and low voltage sides simultaneously, calibrating the differential threshold and harmonic restraint.

  • Transmission Line Distance & Impedance Testing: Simulating various fault types (Phase-to-Earth, Phase-to-Phase) to plot and verify the impedance tripping zones (R/X characteristics).

  • Smart Substation (IEC 61850) Testing: Testing Intelligent Electronic Devices (IEDs) in modern digital substations through virtual isolation, GOOSE messaging, and Sampled Value (SV) verification.

  • End-to-End (Dual-Ended) Synchronized Testing: Pairing two relay test kits via GPS/IRIG-B satellite signals to test line differential protection on long-distance transmission lines simultaneously at both substations.

Step-by-Step Operating Guide for Protection Relay Testers

(Note: Always follow local high-voltage safety regulations and standard operating procedures before testing.)

To maintain accuracy and ensure safety during secondary injection testing, our เครื่องทดสอบระบบป้องกันรีเลย์ are typically operated following these five standard steps:

Step 1: Isolation and Safety Preparation

Before connecting the test kit, safely isolate the protective relay under test from the live substation system. Disconnect the CT (Current Transformer) and VT (Voltage Transformer) secondary circuits using test switches or bridging plugs to prevent accidental high-voltage back-feeding or CT open-circuits.

Step 2: Hardware Wiring Connection

Connect the voltage and current output channels of the เครื่องทดสอบรีเลย์ to the corresponding secondary input terminals of the protective relay. Connect the binary input/output (trip/close contacts) of the relay to the binary channels of the tester to capture the exact tripping time.

Step 3: Software Parameter Configuration

Boot up the embedded microcomputer software. Select the specific test module based on the relay type (e.g., Overcurrent, Distance, or Differential). Input the relay’s nominal settings, fault current/voltage values, and pre-fault/fault duration parameters.

Step 4: Test Execution and Fault Simulation

Run the automated test sequence. The microcomputer relay tester will inject high-precision analog signals into the relay while monitoring its binary feedback. The software will automatically capture the exact trip time, pickup values, and dropout ratios.

Step 5: Data Analysis and Report Generation

Compare the captured test results against the manufacturer's specified tolerances. Once the calibration is successful, save the data locally or export a standard, unmodifiable PDF test report for asset management and compliance audits.

About Run Test – Your Trusted Protection Relay Test System Factory

As a premier ผู้ผลิตอุปกรณ์ทดสอบไฟฟ้า, Run Test is dedicated to engineering and supplying high-precision power system testing solutions for the global electrical industry. With decades of manufacturing expertise, our state-of-the-art facility specializes in the R&D, production, and calibration of heavy-duty secondary injection test kits, transformer test sets, and circuit breaker analyzers.

We are committed to delivering industrial-grade reliability. Every เครื่องทดสอบระบบป้องกันรีเลย์ we manufacture undergoes rigorous factory inspection and calibration to meet strict international standards, including ISO 9001 and CE certifications. Our digital and microprocessor-based test sets are widely trusted by power utilities, high-voltage substations, and electrical engineering labs across more than 50 countries.

At Run Test, we don't just supply equipment—we deliver comprehensive technical support, software updates, and reliable warranty services. Whether you are looking for standard three-phase relay test kits or advanced IEC 61850-compliant six-phase testing platforms, Voltage provides factory-direct pricing and customized OEM/ODM solutions to power your grid testing projects.

Frequently Asked Questions About Relay Testing

Q1: What is a relay protection tester?

เอ เครื่องทดสอบระบบป้องกันรีเลย์ is a specialized electrical testing device used to verify the operation, settings, and response times of protective relays in electrical power transmission and distribution systems.

Q2: What is the difference between a generic relay tester and a protection relay tester?

While a generic "relay tester" may refer to low-voltage automotive or industrial relay tools, a professional protection relay tester is specifically engineered with high-power secondary injection capabilities to test sophisticated protective relays used in electrical substations.

Q3: How does a secondary injection protection relay tester work?

It works by disconnecting the protective relay from its VT/CT (Voltage/Current Transformers) and injecting precisely simulated current and voltage signals into the relay to evaluate its performance under simulated power grid fault conditions.

Q4: What industries rely on protective relay testing equipment?

Our systems are extensively utilized by electric power utilities, high-voltage substations, railway power networks, industrial manufacturing plants, and electrical maintenance service providers.