Technical parameters of microcomputer relay protection tester provided by Yangzhou Topu Electric Technology Co., Ltd

The 702 microcomputer relay protection tester uses a high-performance digital control processor as the control microcomputer, and applies a dual precision algorithm on the software to generate high-precision waveforms of any phase. By using a high-speed high-level D/A converter, the accuracy and linearity of current and voltage across the entire range are ensured. The current and voltage of each phase do not use current and voltage boosters, but adopt direct output mode, so that the current and voltage sources can directly output waveforms from DC to various frequency components, such as square waves, combined waveforms of various harmonics, fault transient waveforms, etc., which can simulate the current and voltage characteristics of various short-circuit faults well.
This three-phase microcomputer relay protection tester has standard four phase voltage and three-phase current outputs, making it easy to conduct various types of protection tests. The single machine is operated by a convenient and flexible rotating mouse through a large LCD screen, with all Chinese displayed. It can complete most of the on-site testing and calibration work, and can calibrate various relays and microcomputer protections. Ready to use upon startup, easy and fast to operate.

Main Features
1. Standard 3-phase current and 4-phase voltage output: With 4-phase voltage and 3-phase current output, it can easily perform various combination outputs for various types of protection tests. Each phase voltage can output 120V, and the three-phase current can output 120A. The fourth phase voltage Ux is a multifunctional voltage item that can be set to 4 types of 3U0 or detect the synchronous voltage, or output any voltage value.
2. Easy single machine operation: The single machine is operated by a convenient and flexible rotating mouse through a large LCD screen, all displayed in Chinese. It can complete most of the on-site testing and verification work, verify various relays and microcomputer protections, and simulate complex instantaneous and conversion faults for whole group testing. Ready to use upon startup, easy and fast to operate.
3. Dual operation mode, connected to a computer for operation: Through the full set of Chinese operating software on the Windows platform, various large-scale, complex, and highly automated verification tasks can be performed. It is convenient to test and scan various protection settings, store test data in real time, display vector graphics, draw fault waveforms, and print reports online.
4. The software has powerful functions: it can complete various large-scale and complex verification tasks with high degree of automation, such as three-phase differential test, plant power fast switching, backup automatic switching test, line protection check synchronous reclosing, etc. It can easily test and scan various protection settings, perform fault playback, store test data in real time, display vector graphics, and print reports online.
5. Rich switch contacts: The relay protection tester has 7 contact inputs and 2 pairs of empty contact outputs. The input contacts are compatible with empty contacts and 0-250V potential contacts, and can be intelligently and automatically recognized. The input and output contacts can be expanded according to user needs.
6. Large screen LCD display: This machine adopts a 320 × 240 dot matrix large screen high-resolution graphic LCD display. All operation processes are set on the display screen, and the operation interface and test results are displayed in Chinese, with intuitive and clear display.
7. Self protection: adopting a reasonably designed heat dissipation structure, with reliable and comprehensive multiple protection measures, power soft start, and certain fault self diagnosis and locking functions.
8. Equipped with dedicated DC power output: The device is equipped with one 110V and 220V dedicated adjustable DC power output.
9. High cost-effectiveness: It belongs to cross disciplinary joint design products, integrating multiple professional technological achievements. Combining the performance of a large testing instrument with the price of a small testing instrument, it has a high cost performance ratio.

Technical specifications
1. AC current output
Output accuracy relay protection tester: Level 0.5
Phase current output (effective value): 0-40A
Triple current output (effective value): 0-120A
Long term allowable operating value (effective value) of phase current: 10A
Phase current output power: 420VA
High output power when three parallel current is high: 900VA
Allowable working time when the output of the triple current is high: 10s
Frequency range (fundamental): 20-1000Hz
Harmonic frequency: 1-20 times

2. AC voltage output
Output accuracy: Relay protection tester: Level 0.5
Phase voltage output (effective value): 0-120V
Line voltage output (effective value): 0-240V
Phase voltage/line voltage output power: 80VA/100VA
Frequency range (fundamental): 20-1000Hz
Harmonic frequency: 1-20 times

3. DC current output
Output accuracy: Level 0.5
Current output: 0~± 10A/per phase, 0~± 30A/tri junction
Output load voltage: 20V

4. DC voltage output
Output accuracy: Level 0.5
Phase voltage output amplitude: 0 to ± 160V
Line voltage output amplitude: 0 to ± 320V
Phase voltage/line voltage output power: 70VA/140VA

5. Switch input: 7 channels
Empty contact: 1-20mA, 24V
Potential contact connection: "0": 0~+6V; “1”：+11V～+250V
Switching output: 2 pairs
DC：220V/0.2A； AC：220V/0.5A

6. Time measurement:
Measurement range: 0.1ms to 9999s
Measurement accuracy: 0.1mS

Information organization: Yangzhou Topu Electric Technology Co., Ltd