Shanghai microcomputer relay protection calibrator

On the basis of widely listening to user opinions, the Shanghai microcomputer relay protection calibrator carefully summarizes years of accumulated product development and production experience. The microcomputer relay protection calibrator adopts the new generation relay protection testing device developed by current electronic technology, which can independently complete the testing and debugging of devices and components in professional fields such as relay protection, excitation, and measurement. The microcomputer relay protection calibrator is widely used in scientific research, production, and electrical testing sites in industries such as power, railway, petrochemical, metallurgy, and mining.

1. Industry's * true color touch screen+key control, making operation more effortless

The microcomputer relay protection calibrator adopts an 8-inch true color touch screen, combined with a self-designed keyboard, making operation faster and more convenient. At the same time, when the program starts testing, the touch screen automatically closes to prevent any misoperation.

2. Industry * Built in single channel embedded analog circuit breaker

The microcomputer relay protection calibrator simulates circuit breakers, which are mainly used for the overall testing of relay protection devices and as a substitute for real high-voltage circuit breakers in projects such as the testing of backup power automatic switching devices. The built-in simulation device of this machine is a supporting product of the microcomputer relay protection testing system. Especially in the case of newly built power plants and substations where the high-voltage circuit breakers are not properly adjusted or the DC power supply is not connected, using the built-in simulation circuit breaker for relay protection testing will not be affected by external factors, thereby shortening the debugging time and improving the efficiency of the testing work.

3. Embedded host, equipped with ultra large scale programmable logic device (CPLD)

The mainframe of the microcomputer relay protection calibrator adopts a high-speed and high-performance embedded microcomputer system equipped with CPLD, which has fast response speed, wide transmission frequency band, and can generate high-density fitted sine waves of 500 points per cycle for the base wave. The output waveform is smooth and free of harmonic components. Due to the large number of output points and the use of accurate filtering circuits, the distortion of the waveform is extremely small. In harmonic output, even for the 9th harmonic and 450Hz, a high density of 55 points per cycle can be achieved.

4. Single machine 12 channel D/A simultaneous output

The microcomputer relay protection calibrator adopts a 16 bit high-precision DAC chip to ensure high waveform fitting accuracy and good linearity. It can simultaneously output 12 analog signals to meet testing requirements such as transformer protection and backup power supply self switching.

5. High precision linear amplifier, simultaneously outputting 6-phase voltage and 6-phase current

The voltage and current amplifiers carefully designed by the microcomputer relay protection calibrator achieve AC/DC sharing, and the output stage adopts high-precision superlinear amplification technology. High precision, good reliability, and simultaneous output of 6-phase AC voltage and 6-phase AC current. Each phase's AC voltage output can reach up to 130V and 70VA, and the AC current output can reach up to 180A. The DC voltage output can reach 300V and 130VA.

6. Complete interface, integrated host single box structure

　　Shanghai microcomputer relay protection calibratorThe system operation interface and test results are displayed entirely in Chinese, and all operation processes are set on the display screen for intuitive and clear display. The device can be operated with a built-in touch screen and keyboard, and also provides an external keyboard/mouse port. It also provides 2 USB ports and 2 RS232 ports for communication with external computers and other devices. Simply connect to a 220V power supply and start working. Easy to carry, very suitable for mobile testing and field work.

7. Intelligent self-protection

The microcomputer relay protection calibrator adopts a designed heat dissipation structure to ensure adequate ventilation. And it can simultaneously detect phenomena that endanger the safety of the device, such as overcurrent, overvoltage, overload, short circuit, high temperature, abnormal data, etc. Even if there is an operational error, it will not damage the device. In addition, when a danger signal such as external voltage enters the tester through the terminal, the device alarm indicator light turns red and automatically cuts off the power amplifier.

8. Rich contacts and strong test applicability

The microcomputer relay protection calibrator has eight switch inputs (A B C R a b c r) and four switch outputs. The input contacts are compatible with both empty contacts and 0-250V potential contacts, and can be intelligently recognized.

9. Flexible placement and software functionality*

The microcomputer relay protection calibrator device can be placed vertically or horizontally, and can be operated offline or externally on a PC. The test results can be automatically organized and recorded into a test report for reference, and can also be directly saved on a USB flash drive for easy transfer to an external PC for editing, printing, and other processing. Software upgrade is simple and fast, directly through USB flash drive upgrade or external PC download, without the need to modify any hardware. Software assisted calculation function *, capable of automatically calculating positive, negative, and zero sequence voltage and current, as well as active, reactive, and power factors on the primary and secondary sides. Optional built-in GPS module, only an external antenna is needed for synchronous debugging.

10. Can be used for self commissioning testing

The output of 6-phase voltage and 6-phase current can be used for backup power self switching dual group test and transformer three-phase differential test, and the wiring is very simple.

11. Specially designed differential testing menu for electric railways

The microcomputer relay protection calibrator automatically tests the proportional braking characteristics of electric railway transformers based on the working principle of transformer differential protection in railway traction transmission and transformation systems.