Product Details

The microcomputer relay protection test system is a new generation of relay protection test system independently developed by our company based on the Windows CE operating system. It adopts the digital phase-locked loop algorithm and SPWM technology developed under the current advanced SOC design concept, and has advanced level high-precision signals and high-efficiency, high-stability power amplifiers. It provides users with a comprehensive, fully functional and easy-to-operate test solution.

2. System Features

2.1. Adopts advanced embedded system, high-speed DSP processor and ultra-large-scale field programmable logic device FPGA;

2.2 Each cycle reaches 1448 points of waveform fitting, which is at a leading position in China, significantly improving the amplitude-frequency characteristics of the test system and the transient response of voltage and current. The current transient response is 20μs, and the voltage transient response is 30μs, significantly surpassing the national standard (200μs). Excellent transient response can better adapt to the development direction of new fast microcomputer protection;

2.3 Takes the lead in using 20-bit serial port D/A digital-to-analog converter. The serial port D/A has better linearity and accuracy than the parallel port D/A, and greatly improves the accuracy of small voltage and current signals;

2.4 AH103 has 4 channels of voltage output and 3 channels of current output; AH106 has 7 channels of voltage output and 6 channels of current output. Voltage 0-120V, relative error 0.1%, current 0

-40A

, relative error 0.2%.

2.5 40-220V/

0.6A 

Auxiliary DC power supply, controlled by software, can independently provide working power to protection devices or other equipment. The ripple coefficient is less than 0.1%, and the accuracy is 0.5%;

2.6 Frequency range up to 0 –1000Hz, resolution 0.001Hz, accuracy 0.003Hz;

2.7 Phase resolution 0.001°, accuracy 0.1°;

3. About AH Series Test Software

3.1 The upper computer test software supports WINDOWS 2000

WINDOWS XP operating system;

3.2 Complete and rich functions, friendly interface, simple and quick operation,

can meet the needs of various protection tests;

4. Technical Indicators

4.1 Performance Characteristics

4.1.1 

It can test various types of voltage, current, frequency, power, impedance, harmonic, differential, synchronism and other relays manually or automatically. It can simulate various fault types for distance, zero-sequence protection device setting verification and complete group test of protection devices. It can automatically scan the ratio braking curve of microcomputer and digital transformer, generator-transformer group differential protection, and has GPS trigger function;

4.1.2

Adopts unique heat dissipation components. The host has four large-power exhaust fans built in, and uses temperature protection detection measures, so that the power amplifier has excellent stability and reliability under large current and long-term operation. The current source itself has open circuit protection function and open circuit alarm function, the voltage source has short circuit protection function, output has clipping distortion detection function, mis-wiring judgment alarm self-locking protection function, and output waveform dynamic monitoring and display function;

4.1.3

It has mutually isolated input contacts, empty contacts and potential contacts, adapting to various wiring methods;

4.1.4

It has complete offline operation function, and its amplitude, phase and frequency are arbitrarily continuously adjustable, and the operation is simple. 800×600 large-screen LCD display, full Chinese interface. When running offline, it can test various AC/DC, frequency, power, impedance, harmonic, differential, synchronism relay action values and action times manually or automatically, and can simulate various fault types for distance, zero-sequence protection device setting verification and complete group test of protection devices. It can automatically scan the ratio braking curve of microcomputer and digital transformer, generator-transformer group differential protection;

4.1.5

Uses TI's DSP and large-scale programmable device FPGA from the United States, 1448-point waveform simulation, giving the tester better transient response and better amplitude-frequency characteristics, and is the first in China to use 20-bit serial port DA, further improving output accuracy;

4.2 Technical Parameters

4.2.1

Power supply voltage: Single phase 220V+10%; Power: 1000VA; Power frequency: 50Hz+10%

4.2.2

Current source:

6 (3) × (0～40A)    3-phase parallel 0～120A

  Long-term allowable working current      Three-phase each phase 20A  Maximum short-term 10S working value   Three-phase parallel 120A

  Resolution 1mA, maximum output power per phase 450VA, frequency output range 0～1000Hz

4.2.3 Voltage source:

7 (4) × (0～120 V)     Line voltage 0～240V

Resolution 1mV   Maximum output power 60W, frequency range 0～1000Hz                 

4.2.4 DC source:

DC voltage source amplitude 0～300V, relative accuracy 0.2%, resolution 1mA, power 100VA;

DC current source amplitude 0～40A, relative accuracy 0.2%, resolution 1mA, power 300W.

4.2.5 Accuracy:

Current accuracy: relative accuracy 0.1% in the range of 0.2A～30A

Voltage accuracy: relative accuracy 0.1% in the range of 1V～120V

Frequency accuracy: error less than 0.001Hz at 50Hz, frequency level difference 0.001Hz

Phase accuracy: error less than 0.2 degrees, range +360 degrees, resolution 0.1 degrees

Sine wave distortion: less than 0.4%

Time accuracy: measurement range 0～999.999s, error 0.1ms

Voltage load capacity: 60W per phase, current load capacity: 450W per phase

Three-phase parallel 910W

Auxiliary DC power supply: 40～220V/0.5A, continuously adjustable, accuracy and stability better than 0.5%

Harmonic order: can superimpose 1～20 (three-phase is 10) harmonics

Input contacts: eight pairs of empty contacts, compatible with potential (10V～250V) contacts

Output contacts: four pairs of empty contacts, capacity 250V/2A

Dimensions: 460 mm (length) ×167mm (width) ×320mm (height)                   

Weight: 20kg

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.