The DRJB870 six-phase microcomputer relay protection tester is a portable testing device used for commissioning and calibration of power system relay protection devices. Based on microcomputer control technology, this device can output six-phase voltage and six-phase current, making it suitable for relay protection testing in scenarios such as power plants, substations, and distribution rooms. The device uses industrial-grade components and has good electromagnetic compatibility performance, capable of meeting the usage requirements of on-site and laboratory environments.
This tester supports a variety of relay protection test items, including but not limited to: definite-time overcurrent protection, inverse-time overcurrent protection, zero-sequence protection, distance protection, differential protection, reclosing, backup automatic switching, etc. The device can simulate fault voltage and current waveforms, output AC and DC signals, and has functions such as harmonic superposition, frequency variation, and phase adjustment. The built-in testing software provides manual test and automatic test modes. Users can select the corresponding test module according to the type of device under test to complete operations such as setting verification, characteristic scanning, and operation time measurement.
AC voltage output: 6 phases, each phase 0–120V, output power not less than 30VA; AC current output: 6 phases, each phase 0–30A, output power not less than 300VA; DC voltage output: 0–300V; DC current output: 0–20A. Frequency range: 0–1000Hz, resolution 0.001Hz. Phase range: 0–360°, resolution 0.01°. Harmonic order: 2nd–20th. Time measurement range: 0–9999s, accuracy ±1ms. The device is equipped with 8 binary inputs and 4 binary outputs, supporting dry contacts and potential contacts. Communication interfaces include USB, RS232, and Ethernet, facilitating connection with external devices.
This tester is suitable for routine calibration by power system relay protection teams, commissioning tests of newly installed devices, periodic maintenance, and analysis of action behavior after faults. It can test electromagnetic, transistor, integrated circuit, and microcomputer-based relay protection devices. At the same time, the device can also be used for power system simulation experiments and teaching demonstrations in research institutes and universities. Its portable design facilitates on-site mobile use, and with dedicated test cables and clamps, wiring and testing can be completed quickly.
Before use, please read the product manual carefully to ensure that the power supply voltage is consistent with the device requirements. During testing, electrical safety work regulations should be observed, and grounding and insulation protection should be properly implemented. The device should be stored in a dry, ventilated environment free of corrosive gases, avoiding severe vibration and impact. Calibrate the device regularly to ensure the accuracy of test data.
