Microprocessor Numerical Relay Protection Test Set for Substation Applications
The Microprocessor Numerical Relay Protection Device is designed for transformer, feeder, and transmission line protection testing in 10kV–35kV substations.
Compliant with IEC 60255 standards, this advanced secondary injection test set provides reliable protection testing, fast response, and intelligent monitoring for modern power systems.
It is widely used in substations, power utilities, electrical laboratories, and protection relay testing environments.
The device adopts high-precision DSP control, modular linear amplifier technology, and industrial-grade embedded computing architecture to ensure stable waveform output, high accuracy, and strong anti-interference performance.
Key Features
- Designed for transformer, feeder, and line protection testing
- 4-phase voltage output and 3-phase current output system
- Each phase voltage output up to 120V
- Three-phase current output up to 120A
- Fourth channel Ux supports 3U0 or arbitrary voltage output
- Built-in industrial control system with Windows operating platform
- Integrated TFT LCD display, trackball, and keyboard for standalone operation
- Dual operating mode: standalone or PC software control
- High-fidelity linear amplifier ensures smooth waveform output without interference
- DSP-based digital signal processing for high-speed performance
- Built-in self-protection (overcurrent, overvoltage, overheating, short circuit)
- Automatic fault diagnosis and output lock protection
- Supports harmonic generation and waveform simulation
- Built-in DC auxiliary power output (110V / 220V adjustable)
- 8-channel input and 4-channel output for switch measurement
- USB, RS232, and Ethernet communication interfaces
Applications
- Relay protection testing in 10kV–35kV substations
- Transformer protection system verification
- Feeder and transmission line protection testing
- Circuit breaker and switchgear testing
- Secondary injection testing in power laboratories
- Power system commissioning and maintenance
- Protection relay calibration and fault simulation
Advantages of the Relay Test System
This relay protection test set provides highly accurate secondary injection signals for verifying relay performance under different fault conditions.
The linear amplifier design ensures clean waveform output without high-frequency interference, making it suitable for complex substation environments.
Its integrated industrial computer system and dual operating modes improve flexibility and testing efficiency for field engineers.
Reliable Supply & Service Support
- Language Customization Available
Software interface, operation manuals, and technical documentation can be customized for different markets.
- 2-Year Warranty & Technical Support
All units are supplied with a 2-year warranty and full technical support service.
- Strict Quality Control
Each device is fully tested before delivery to ensure accuracy, stability, and safety.
- OEM & Customized Solutions Available
Voltage, current, interface, and functional configurations can be customized based on requirements.
Technical Specifications
| Item |
Specification |
| AC Output Current Accuracy |
0.2 class |
| AC Current Output Range |
0–40A (per phase) |
| Three-phase Current Output |
0–120A |
| AC Voltage Output Range |
0–120V |
| Line Voltage Output |
0–240V |
| DC Current Output |
0–±10A / 0–±30A |
| DC Voltage Output |
0–±160V / 0–±320V |
| Frequency Range |
0–1000 Hz |
| Harmonics |
0–20 times |
| Switch Input Channels |
8 channels |
| Switch Output Channels |
4 pairs |
| Timing Measurement |
0.1 ms – 9999 s |
FAQ
What is a relay protection test set used for?
It is used to test and verify protection relays in substations by simulating electrical fault conditions.
What systems can this device test?
It can test transformer protection, feeder protection, line protection, and circuit breaker control systems.
Does it support computer control?
Yes, it supports both standalone operation and PC-based control via Ethernet or communication interfaces.
