Reference Standard: Basic DL / T624-1997 Introduction DBJB-802A relay protection tester is in reference to the Ministry issued a "microprocessor-based relay test device technology (draft)", based on the user listen comments summarize current strengths and weaknesses of the domestic like product, full use of modern technology and advanced microelectronics devices to achieve a new type of miniaturized relay protection tester. It uses a separate stand-alone operation, advanced structure can also join the laptop to run. Host built a new generation of high-speed digital signal processor computer, true 16-bit DAC module, the new modular high-fidelity power amplifier, comes with a large LCD display and flexible rotating mouse controller. Stand-alone independent operation already has a strong function, can be most trials, coupled with a more powerful computer to run the operating functions. Small size, high accuracy. Both with large tester superior performance, advanced features, but also has a small tester compact and flexible, easy to operate, high reliability, high cost performance. Following is a good tool to protect workers in handy. Features l standard 4-phase voltage three-phase current output with a 4-phase voltage three-phase current output can be easily carried out in various combinations for various types of output protection test. Each phase output voltage 120V, and output current three 120A, the fourth phase voltage Ux for multifunction voltage items can be set to four kinds of synchronous voltage 3U0 or seizure, or any situation the output of a voltage value. l easy to operate stand-alone single screen operated by a convenient and flexible photovoltaic trackball mouse by large-screen LCD, all Chinese display. Most of the trials to be completed on-site verification work, can be of various relays and computer protection for examination, and can simulate complex transient, permanent, converting the entire group of test failures. Boot to use, easy to operate. l dual mode of operation, run by a full Chinese connected computer operating software on the Windows platform, can be a variety of large and complex higher degree of automation and verification work, you can easily test and scan all kinds of protection setting, real-time storage test data, display vector, drawing fault waveform, online print reporting l powerful software can complete a variety of high degree of automation of large, complex calibration work, such as three-phase differential test, auxiliary power fast, prepared from the cast test line reclosing protection inspection period, able to easily test and scan all kinds of protection setting, fault playback, real-time storage of test data, display vector, online print reports. l rich 10-way switch contacts contact inputs and eight pairs of empty contact output. The input terminal is empty contacts and potential contacts 0 ~ 250V compatible, can be intelligent automatic identification. Input, output contacts can be extended according to user needs. l large-screen TFT display of this machine uses 800 × 600 dot-matrix TFT high-resolution large-screen color LCD display, all operating processes are set on the display, user interface, and test results were finished display, showing clear and intuitive self l protection using rational design of thermal structure, and has a variety of reliable and comprehensive protection measures and power soft start, and a certain self-diagnostic and lockout. l with separate DC power output device has a dedicated 110V and 220V special way adjustable DC output l cost-effective part of a multi-disciplinary co-design products, integrated multi-disciplinary advanced scientific and technological achievements. Both large tester performance, and price small tester with high performance and low cost. Technical indicators AC current output accuracy of 0.2 output phase current output (RMS) 0 ~ 40A three and current output (RMS) 0 ~ 120A longer allowed to work with the current value (RMS) 10A phase current of three and a maximum output power 420VA When the maximum output current maximum output power allowable working hours and a maximum output current when the 900VA three 10s frequency range (fundamental) 20 ~ 1000Hz harmonic number from 1 to 20 times the output of the DC current output accuracy 0.2 Current output 0 ~ ± 10A / A per phase , 0 ~ ± 30A / three and maximum output load voltage of 20V AC voltage output phase voltage output accuracy of 0.2 output (RMS) 0 ~ 120V line voltage output (RMS) 0 ~ 240V phase voltage / line voltage output power 80VA / 100VA frequency range (fundamental) 20 ~ 1000Hz frequency harmonics 1 to 20 times the output DC voltage output voltage accuracy of 0.2 relative to the output amplitude 0 ~ ± 160V line voltage output amplitude 0 ~ ± 320V phase voltage / line voltage output power 70VA / 140VA switching time measurement and digital input 10-way air contacts: 1 ~ 20mA, 24V; potential contact Access: "0": 0 ~ 6V; "1": 11V ~ 250V switching outputs eight pairs of DC: 220V / 0.2 A; AC: 220V / 0.5A volume weight dimensions 400 × 300 × 180mm3 single weight 18kg Power supply AC 220V ± 10%, 50 / 60Hz Ambient temperature -10 ℃ ~ + 50 ℃