KJ660 type microcomputer relay protection testerDetailed product description：

KJ660 microcomputer relay protection tester is a new type of intelligent testing instrument developed in the past decade. The previous 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 calibration 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. Therefore, the microcomputer relay protection tester will inevitably become an essential testing tool for modern relay protection workers.

Technical parameters of KJ660 microcomputer relay protection tester
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: 0-125V/phase line voltage 0-250V
DC amplitude: 0-110V/phase
Auxiliary power supply VZ: 3V0 0-150VAC or 0-220VDC
Maximum 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 0.5A/250VAC
7. Power supply voltage: 120V~250VAC 50/60Hz
8. Chassis size: 450mm × 150mm × 370mm
9. Weight: 11.6kg

Main Features
1. Intelligent host, controlled by DSP chip and 16 bit DAC output, can generate high-density sine waves of 2000 points per week for the fundamental wave, which is the highest level among domestic testers. Greatly improved waveform quality and enhanced the accuracy of the testing instrument.
2. Single machine independent operation, the device is operated by a rotating mouse through a large LCD screen, with a complete set of Chinese display. It can calibrate various relays, protection and safety automatic devices on site, and simulate various large and complex instantaneous, permanent and conversion faults for whole group testing.
3. Connect to a computer and use the full set of Chinese operating software on the Windows 98 platform to perform various large-scale, complex, and highly automated calibration tasks. It can easily test and scan various protection settings, store test data in real time, display vector graphics, draw fault waveforms, and print reports online.
4. The LCD display adopts a 320 × 240 dot matrix graphics module, and the operation interface is displayed in Chinese, which is intuitive and clear.
5. The "foolproof" operation adopts an advanced "rotating mouse" controller, which eliminates complex keyboard operations and can be operated without the need for computer knowledge, making it easy to learn.
6. The whole machine adopts switch power supply and switch amplifier technology, with small size and light weight, weighing only 11.6 kilograms.
7. Modular design, all plugins are completely independent, and hardware maintenance and upgrades can be achieved by simply replacing the plugins.
8. Arbitrary configuration, such as configuring 6-phase current, 5-phase voltage+2-phase current, etc.
9. Users can calibrate the accuracy of the tester through software
10. Can replay fault waveform data in Comtrade format.
11. Designed with power factor correction circuit according to international standards, the device efficiency can reach over 95%.
When the power supply voltage drops to 120V, the device still operates normally.
13. The amplifier adopts hardware protection to ensure the reliability of the device.

Precautions for use
The tester adopts a plug-in structure, which is small in size, light in weight, stable in performance, high in reliability, and generally not easy to damage. Users should regularly turn on the device to prevent moisture from affecting the components. The tester backpack is made of nylon material and should be kept away from fire sources. Cigarette butts are strictly prohibited from getting on.