ZX-1600: A Versatile Tester for Modern Relay Protection Systems

Introduction

In today’s complex power grid infrastructure, relay protection systems are the critical first line of defense against faults, overloads, and abnormal operating conditions. The reliability of these protection devices directly impacts grid stability, equipment safety, and uninterrupted power delivery. As protection schemes evolve from traditional electromechanical relays to advanced microprocessor-based units, testing equipment must keep pace with higher precision, multi-functionality, and user-friendly operation. The ZX-1600 Microcomputer Relay Protection Tester emerges as a robust solution tailored to meet the diverse and demanding testing requirements of the power industry.

Core Hardware and Operational Design

The ZX-1600 is built around a high-performance industrial personal computer (IPC) running the stable Windows XP operating system, delivering a familiar and reliable computing environment for field technicians. Its 8.4-inch TFT color display (800×600 resolution) provides clear, real-time visualization of test processes, equipment status, and diagnostic data, eliminating ambiguity during complex test sequences.

Key design features include:

An integrated industrial keyboard for direct, tactile operation.

Multiple front-panel USB ports for seamless data access, communication, and software upgrades without conversion adapters.

A Chinese-language interface with intuitive navigation, reducing training overhead and minimizing human error in high-pressure field environments.

This combination of industrial-grade hardware and user-centric design ensures consistent performance and ease of use across diverse substation and laboratory settings.

Comprehensive Testing Capabilities

The ZX-1600 is engineered to address the full spectrum of on-site relay protection testing requirements, with a flexible, multi-phase output architecture that supports both legacy and modern protection devices.

1. AC Current Source (6×40A)

Single-phase output: 0–40A RMS per phase, with an accuracy of 0.2% ±5mA, ensuring precision for both low-level and high-current tests.

Six-phase parallel operation: Delivers up to 240A RMS, ideal for high-current applications (rated for 10-second peak operation).

Long-term continuous rating: 10A RMS per phase for sustained testing scenarios.

Frequency and harmonic support: 0–1000Hz range (0.001Hz accuracy) and harmonic generation up to the 20th order, enabling validation of protection response to power quality disturbances.

Phase control: 0–360° adjustment with 0.1° accuracy, critical for verifying directional and differential protection logic.

2. AC Voltage Source

Single-phase output: 0–120V RMS per phase, with 0.2% ±5mV accuracy, and line voltage output up to 240V RMS.

Output power: 75VA per phase voltage / 100VA line voltage, supporting tests for voltage-dependent protection elements.

Matched frequency, harmonic, and phase control capabilities to align with AC current testing parameters.

3. DC Sources

DC current output: 0–±20A per phase (0.5% ±5mA accuracy), for testing DC-operated relays and auxiliary circuits.

DC voltage output: 0–±160V single-phase / 0–±320V line voltage, with dedicated 110V (1A) and 220V (0.6A) auxiliary DC power supplies to power field relays and devices during testing.

4. Switching Value Terminals

Input terminals: 8 pairs of switch inputs, supporting both active (24V, 1–20mA) and passive contact signals, for monitoring trip and status signals.

Output terminals: 4 pairs of idle contact outputs, rated at 110V/2A and 220V/1A breaking capacity, for simulating control and trip commands.

Key Advantages for Field Applications

Universal Compatibility: The six-phase voltage and current output architecture supports testing of traditional relays, modern microprocessor-based protection, and specialized schemes like transformer differential protection.

High-Fidelity Amplifiers: Linear power amplifiers ensure both small-current accuracy and large-current stability, eliminating measurement errors across the full operating range.

Flexible Operation: Optional laptop connectivity allows mirroring of test operations using the same software interface, enabling on-the-go analysis and report generation.

Rugged, Compact Form Factor: With dimensions of 520mm × 420mm × 190mm and a weight of approximately 23kg, the tester is designed for portability without compromising performance. It operates on standard AC220V ±10% (50Hz, 10A) power, suitable for field and lab use.

Precision Timing: A 1ms–9999s time measurement range (1ms accuracy) ensures accurate verification of relay operating times, a critical parameter for protection coordination studies.

Conclusion

The ZX-1600 Microcomputer Relay Protection Tester represents a versatile, high-performance solution for the evolving needs of the power industry. By combining multi-phase output capability, high-precision measurement, and user-friendly design, it addresses the challenges of testing both legacy and next-generation protection systems. For utilities, maintenance teams, and service providers, the ZX-1600 is a reliable tool that enhances testing efficiency, improves accuracy, and supports the ongoing reliability of power grid infrastructure.

 GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/