The KDJB-1200Y is a state-of-the-art, high-precision six-phase microprocessor relay protection tester designed for comprehensive testing and calibration of modern power system protection devices. Engineered for reliability, accuracy, and ease of use, it is an essential tool for power system engineers and technicians involved in commissioning, maintenance, and troubleshooting of secondary protection systems.

Featuring 6 independent voltage and 6 current outputs, the KDJB-1200Y supports flexible configurations to simulate complex power system conditions, including symmetrical and asymmetrical faults, transient disturbances, and harmonic distortions. With output capabilities of up to 120V AC per phase voltage and 30A AC per phase current (up to 180A in six-phase parallel mode), it meets the demanding requirements of testing advanced digital, numerical, and electromechanical relays.

Powered by a high-performance DSP (Digital Signal Processor) control system and equipped with a high-fidelity linear power amplifier, the tester delivers clean, low-distortion signals for accurate and repeatable results. Its intuitive software interface enables automated test routines for overcurrent, distance, differential, and reclosing protection functions, significantly improving testing efficiency and report generation.

The KDJB-1200Y also features complete I/O interfaces, including 10 digital input channels and 8 output contacts, time measurement accuracy down to 0.1ms, and built-in isolated DC power supplies (110V/220V adjustable), making it ideal for a wide range of protection schemes. Additional benefits include USB connectivity for data transfer, robust overload protection, and a compact, portable design (360×350×180 mm, 17kg) for convenient field deployment.

Whether in substations, power plants, or testing laboratories, the KDJB-1200Y ensures reliable, efficient, and precise relay testing—helping to safeguard the stability and integrity of critical power infrastructure.

The KDJB-1200Y combines **six independent voltage and current outputs** with high precision (0.2% accuracy), a high-fidelity linear amplifier, and powerful DSP control, enabling flexible, accurate, and automated testing of complex protection relay systems in both laboratory and field environments.

AC current output
When outputting 6-phase current, each phase output (effective value): 0-30A, output accuracy of 0.2 level
When outputting 3-phase current, each phase output (effective value): 0-60A
6-phase parallel current output (effective value): 0-180A
Long term allowable operating value (effective value) of phase current: 10A
Maximum output power of phase current: 300VA
Maximum output power at maximum output of 6-phase parallel current: 1000VA
Maximum allowable working time for 6-phase parallel current output: 10s
Frequency range (fundamental): 1-1000Hz
Harmonic frequency: 1-20 times

 

DC current output
Current output: 0~± 10A/phase, output accuracy of 0.5 level
Maximum output load voltage: 20V

AC voltage output
Phase voltage output (effective value): 0-120V, output accuracy of 0.2 level
Line voltage output (effective value): 0-240V
Phase voltage/line voltage output power: 80VA/100VA
Frequency range (fundamental): 1-1000Hz
Harmonic frequency: 1-20 times

 

DC voltage output
Phase voltage output amplitude: 0~± 160V, output accuracy level 0.5
Line voltage output amplitude: 0 to ± 320V
Phase voltage/line voltage output power: 70VA/140VA

 

discrete signal
10 switch inputs: air contact, 1-20mA, 24V; Potential contact connection, “0”：0～+6V； “1”：+11V～+250V
8 pairs of switch output: DC: 220V/0.2A; AC：220V/0.5A

 

Time measurement range
0.1ms～9999s， Measurement accuracy ＜ 0.1mS

 

Volume and weight
Volume: 360 × 350 × 180 (mm ³)
Individual weight: 17kg