Product Details

Main Features:

1. Meet all on-site test requirements.

The KJ880 model has standard six-phase current and six-phase voltage simultaneous output, with current 30A/phase and voltage 125V/phase. Six-phase current in parallel can reach 180A. It can test various traditional relays and protection devices, as well as modern microcomputer protection devices for various tests, especially for transformer differential protection and standby power supply automatic switching devices, making tests more convenient and accurate.

2. All technical indicators fully meet the standard of DL/T624-1997 "Technical Conditions for Microcomputer-based Test Equipment for Relay Protection" issued by the Ministry of Electric Power.

3. Standalone operation with built-in high-performance industrial computer, main frequency 300-600MHz, memory 128M, hard disk 6-12G, running Windows XP operating system.

4. The first in the domestic industry to adopt imported brushed stainless steel panel and stainless steel keyboard, also using touch mouse, overcoming the disadvantages of trackball mouse being inflexible and easily damaged, and selecting an 8.4-inch TFT true color display with resolution of 800×600, making the overall operation of the standalone unit convenient and durable.

5. The main control board adopts DSP+FPGA structure, 16-bit DAC output, which can generate high-density sine waves of 2000 points per cycle for the fundamental wave, greatly improving waveform quality and test accuracy.

6. The power amplifier adopts high-fidelity linear power amplifier, ensuring both the accuracy of small currents and the stability of large currents.

7. Uses USB interface to directly communicate with PC, no need for any conversion cables, convenient to use.

8. Can be connected to a laptop for operation. The laptop and industrial computer use the same software, no need to relearn operating methods.

9. Equipped with GPS synchronization test function. The device can have a built-in GPS synchronization card (optional) connected to PC via RS232 port, enabling two test instruments to perform synchronous remote testing at different locations.

10. Equipped with independent dedicated DC auxiliary voltage source output, with output voltages of 110V (1A) and 220V (0.6A) respectively, to provide DC working power for relays or protection devices that require it.

11. Has software self-calibration function, avoiding the need to open the chassis and adjust potentiometers to calibrate accuracy, greatly improving the stability of accuracy.

Hardware Composition of the Device:

1. Built-in high-performance industrial control computer

This device uses a high-performance industrial computer as the control computer, configured with 128M memory, 6~12G hard disk, pre-installed Windows XP operating system, panel with 8.4-inch 800×600 resolution TFT true color LCD display, stainless steel optimized keyboard and touch mouse, can be used directly without external keyboard and mouse. The device panel is equipped with two USB interfaces for convenient data storage, data communication, and software upgrade.

2. DSP digital signal processing system

Uses 6000 series DSP controller as the core, FPGA programmable logic device outputs waveforms. Due to the use of DDS hardware output waveform technology, the waveform frequency and phase accuracy are quite high. At the same time, the system communicates with the industrial computer directly via USB2.0 interface, making data communication stable and reliable.

3. D/A and A/D conversion

Uses high-precision D/A converter, and also uses active low-pass filter to make the output waveform smooth with excellent amplitude-frequency characteristics. The control system also retains 12 channels of 12-bit A/D conversion circuits, which can collect the output waveforms of 12 analog channels in real time and display the actual output waveform, amplitude, and phase on the screen through software.

4. Microcomputer relay protection test system  High-precision linear voltage, current power amplifier



Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.