| Relay Protection Tester |
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 based on the current advanced SOC design concept, and possesses high-precision signal and high-efficiency, high-stability power amplifiers at an advanced level. 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 achieves 1448-point waveform fitting, which is at a leading domestic position, significantly improving the amplitude-frequency characteristics and voltage and current transient response of the test system. The current transient response is 20μs, and the voltage transient response is 30μs, clearly 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 D/A digital-to-analog converters. Serial D/A has better linearity and accuracy than parallel 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
, relative error 0.2%.
2.5 40-220V/
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 It has complete and rich functions, friendly interface, simple and fast operation,
and can meet the needs of various protection tests;
4. Technical Indicators
4.1 Performance Features
It can test various types of relays such as voltage, current, frequency, power, impedance, harmonic, differential, and synchronism relays manually or automatically. It can simulate various fault types for distance and zero-sequence protection device setting verification and complete group tests of protection devices. It can automatically scan the ratio braking curves of microcomputer and digital transformers and generator-transformer unit differential protection, and has GPS trigger function;
4.1.2
Adopts unique heat dissipation components. The host has four built-in large-power exhaust fans and uses temperature protection detection measures, so that the power amplifier has excellent stability and reliability under high current and long-term operation. The current source itself has open-circuit protection and open-circuit alarm functions, the voltage source has short-circuit protection, 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 continuously adjustable arbitrarily, with simple operation. 800×600 large-screen LCD display, all-Chinese interface. When running offline, it can test the action values and action times of various AC/DC, frequency, power, impedance, harmonic, differential, and synchronism relays manually or automatically, and can simulate various fault types for distance and zero-sequence protection device setting verification and complete group tests of protection devices. It can automatically scan the ratio braking curves of microcomputer and digital transformers and generator-transformer unit differential protection;
4.1.5
Uses TI's DSP and large-scale programmable device FPGA from the United States, with 1448-point waveform simulation, giving the tester better transient response and better amplitude-frequency characteristics. It is also the first in China to use 20-bit serial 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-time 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-to-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% within 0.2A～30A range
Voltage accuracy Relative accuracy 0.1% within 1V～120V range
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 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
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