AH series relay protection tester

AH series relay protection tester

1. System Description

The AH series multifunctional microcomputer relay protection testing system is a new generation relay protection testing system independently developed by our company based on the Windows CE operating system. It is a digital phase-locked algorithm and SPWM technology developed based on the current advanced SOC design concept, and hasWorld · AdvancedHorizontal high-precision signal and high-efficiency, high stability power amplifier. Provide users with comprehensive, fully functional, and easy-to-use testing solutions.

2. Characteristics of AH series relay protection tester system

2.1. Adopting advanced embedded systems, high-speed DSP processors, and large-scale field programmable logic devices FPGA;

2.2 The weekly waveform fitting reaches 1448 points, which is in a domestic position and significantly improves the amplitude frequency characteristics and voltage and current transient response of the testing system. The current transient response is 20 μ s and the voltage transient response is 30 μ s, significantly exceeding the national standard (200 μ s). Excellent transient response can better adapt to the development direction of new fast microcomputer protection;

2.3 Pioneered the use of a 20 bit serial port D/A digital to analog converter. Serial port D/A has better linearity and accuracy than parallel port D/A, greatly improving the accuracy of small voltage and current signals;

2.4AH103 has 4 channels of voltage output and 3 channels of current output; AH106 and 7-channel voltage output, 6-channel current output voltage 0-120V, relative error 0.1%, current -40A, relative error 0.2%. 2.5 40-220V/0.6A auxiliary DC power supply, controlled by software, can independently provide working power to protective devices or other equipment. Ripple coefficient less than 0.1%, accuracy of 0.5%;

2.6 The frequency range is 0-1000Hz, with a resolution of 0.001Hz and an accuracy of 0.003Hz;

2.7 Phase resolution of 0.001 °, accuracy of 0.1 °;

3. Regarding AH series testing software

3.1 The upper computer testing software supports WINDOWS 2000

WINDOWS XP operating system;

3.2 Complete and rich functions, user-friendly interface, simple and fast operation,

Can meet the needs of various protection tests;

4. Technical indicators

4.1 Performance Characteristics

4.1.1

Relays of various types such as voltage, current, frequency, power, impedance, harmonics, differential, and synchronization can be tested manually or automatically. They can simulate various fault types for distance and zero sequence protection device calibration and protection device group testing. They can automatically scan microcomputer and digital transformer and generator set differential protection ratio braking curves and have GPS triggering function;

4.1.2

Adopting unique heat dissipation components, the host is equipped with four high-power exhaust fans, and temperature protection detection measures are adopted to ensure excellent stability and reliability of the power amplifier under high current and long-term operation. The current source itself has open circuit protection and open circuit alarm function, the voltage source has short circuit protection function, the output has top cutting distortion detection function, misconnection judgment alarm self-locking protection function, and output waveform dynamic monitoring and display function;

4.1.3

Equipped with isolated input contacts, idle contacts, and potential contacts, suitable for various wiring methods;

4.1.4

It has a complete offline operation function, and its amplitude, phase, and frequency can be continuously adjusted, making it easy to operate. 800 × 600 large screen LCD display, fully Chinese interface. When running offline, various AC/DC, frequency, power, impedance, harmonics, differential, synchronous relay action values and action times can be tested manually or automatically, and various fault types can be simulated for distance and zero sequence protection device setting verification and protection device group testing. The differential protection ratio braking curve of microcomputer and digital transformers and generator sets can be automatically scanned;

4.1.5

Using DSP and FPGA from TI Corporation in the United States, 1448 point waveform simulation is employed to enhance the transient response and amplitude frequency characteristics of the testing instrument. Additionally, the use of a 20 bit serial port DA is the most advanced in China, 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: 20A zu · i per phase, large can be short-term 10 seconds working value: three-phase parallel 120A resolution: 1mA output z · ui High power: 450VA per phase Frequency output range: 0~1000Hz

4.2.3 Voltage source:

7 (4) × (0-120V) line to line voltage 0-240V

Resolution 1mV output power z · ui large 60W frequency range 0-1000Hz

AH series relay protection tester

4.2.4 DC source:

The amplitude of the DC voltage source is 0-300V, with a relative accuracy of 0.2%, a resolution of 1mA, and a power of 100VA;

The amplitude of the DC current source is 0-40A, with a relative accuracy of 0.2%, a resolution of 1mA, and a power of 300W.

4.2.5 Accuracy:

The relative accuracy within the range of 0.2A to 30A is 0.1%

The relative accuracy within the voltage range of 1V to 120V is 0.1%

When the frequency accuracy is 50Hz, the error is less than 0.001Hz, and the frequency difference is 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 carrying capacity of 60W per phase, current carrying capacity of 450W per phase

Three phase parallel 910W

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

The harmonic order can be superimposed with 1-20 (10 for three-phase) harmonics

Eight pairs of empty contacts and compatible potential (10V~250V) contacts for input measurement

Open four pairs of empty contacts with a capacity of 250V/2A

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

Weight 20kg