Performance indicators and technical parameters of KJ880 microcomputer relay protection tester

Performance indicators and technical parameters of KJ880 microcomputer relay protection tester

KJ880 Microcomputer Relay Protection TesterIt is a new type of intelligent testing instrument developed in the past decade. Previously, relay protection testing tools were mainly composed of voltage regulators and phase shifters, which were bulky and had low accuracy, and could no longer meet the verification work of modern microcomputer relay protection. With the continuous development of science and technology, microcomputer relay protection has been widely used in various fields such as line protection, main transformer differential protection, excitation control, etc. The comprehensive automation of substations has become mainstream. So, the microcomputer relay protection tester will inevitably become the * testing tool for modern relay protection workers.

KJ880 Microcomputer Relay Protection TesterPerformance indicators:

1. 10 channels are output simultaneously, which means three different frequencies and phases of voltage and three currents are output simultaneously, with one channel being 3U0, voltage 0-120V, and current 0-40A/three-phase.
2. The microcomputer relay protection tester adopts an 8.4-inch TFT (800 * 600) true color LCD display screen, which can set the interface color according to the on-site lighting environment, providing intuitive image display for easy observation.
3. The lower computer adopts a streamlined and stable Windows CE embedded operating system, with a Windows interface operation style, simple and small application programs, fast running speed, stable system, and friendly and fast interface style.
4. The microcomputer relay protection tester adopts a shortcut key operation experiment in the industry, with a fully integrated design. The host is equipped with a built-in mouse and keyboard, and can also be connected to an external mouse and keyboard, which is more convenient for users' usage habits
5. Using DSP and large-scale programmable device FPGA from TI in the United States, 1448 point waveform simulation, the tester has better transient response and better amplitude frequency characteristics. It also uses 16 bit serial port DA, which is the first in China to further improve output accuracy
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KJ880 Microcomputer Relay Protection TesterIt can manually or automatically test various types of voltage, current, frequency, power, impedance, harmonics, differential, and synchronous microcomputer relay protection testers' relays. It can simulate various fault types for distance and zero sequence protection device setting verification and protection device group experiments. It can test high-voltage line protection (single and double terminal testing), automatic reclosing, intermediate relays, synchronous relays, overexcitation protection, inverse time positive and negative sequence overcurrent protection, timed positive and negative sequence overcurrent protection, compound voltage lockout overcurrent protection, frequency and low cycle load shedding protection, reverse power protection, out of step protection, predetermined grounding protection, negative sequence zero sequence and phase to phase power protection, and fault playback. Equipped with GPS triggering function.

KJ880 Microcomputer Relay Protection TesterTechnical Specifications:

1. Current source:
AC amplitude: 0-40A/phase 0-120A/three-phase parallel connection
DC amplitude: 0-30A/phase 0-90A/three-phase parallel connection
Power: 400VA/phase
Accuracy: 0.2%, response time<160 μ s,
Resolution: AC 1mA, DC 2mA
2. Voltage source:
AC amplitude: 0-120V/phase line voltage 0-250V
DC amplitude: 0-110V/phase
Auxiliary power supply VZ: 3V0 0-150VAC or 0-220VDC
Zui High Power: 50VA/Phase Accuracy: 0.2% Response Time<120 μ s
Resolution: AC 2.5mV DC 3.5mV

3. Frequency: Range 0-1000Hz Resolution 0.001Hz (power frequency) 0.1Hz (1KHz)
4. Phase: Range 0-360 degrees Resolution: 0.1 degrees Accuracy: 0.1 degrees
5. Switching input: 7 pairs of empty contacts or potential flip (5-250VDC)
6. Switching output: 3 pairs of 0./250VAC
7. Power supply voltage: 120V~250VAC 50/60Hz
8. Chassis size: 450mm × 150mm × 370mm
9. Weight: 11.6kg