Characteristics And Applications of Microcomputer Relay Protection Tester

The output part of themicrocomputer relay protection testeradopts DSP control, which has fast operation speed, strong real-time digital signal processing ability, transmission frequency bandwidth, and control high-resolution D/A conversion. The output waveform has high precision, small distortion and good linearity. The use of advanced technology and precision component materials, and a professional structural design, so the device is small in size, light in weight, full-featured, easy to carry, can be turned on to work, and mobile testing is convenient.

Its performance characteristics are:

1. Flexible combination of voltage and current output: output up to 6-phase voltage and 6-phase current, which can be combined arbitrarily to achieve conventional 4-phase voltage 3-phase current type, 6-phase voltage type, 6-phase current type, and 12-phase type output mode, both compatible The traditional various test methods can also conveniently carry out the three-phase transformer differential test and the factory power cut and backup self-switching test.

2. Operation mode: The WIN7-64 operating system inside the stand-alone capacitive touch LED display device runs independently. It can also be connected to a laptop or desktop computer for operation, which is convenient, fast and stable in performance.

3. New high-fidelity linear power amplifier: The output end has always insisted on using high-fidelity, high-reliability modular linear power amplifier, rather than switching power amplifier, with excellent performance. It will not cause high and intermediate frequency interference to the test site, and it guarantees excellent waveform smoothing accuracy from large current to small current.

4. High-performance host: The output part adopts DSP control, fast operation speed, strong real-time digital signal processing ability, transmission frequency bandwidth, control high-resolution D / A conversion. The output waveform has high precision, small distortion and good linearity. A large number of advanced technologies and precision component materials are used, and a professional structural design is carried out. Therefore, the device is small in size, light in weight, full-featured, convenient to carry, can be turned on to work, and mobile testing is very convenient.

5. Powerful software function: it can complete various large-scale and complex verification work with high degree of automation, can easily test and scan various protection settings, perform fault playback, store test data in real time, display vector diagrams, print online reports, etc. 6-phase current can facilitate three-phase differential protection test.

6. With independent dedicated DC power output: There is a 110V and 220V dedicated adjustable DC power output.

7. Complete interface: The device has a USB communication port, which can communicate with computers and other external devices.

8. Perfect self-protection function: The design of heat dissipation structure is reasonable, the hardware protection measures are reliable and perfect, and it has the functions of soft-start of power supply, software self-diagnosis of fault and output blocking.

In addition, themicrocomputer relay protection testerhas the following purposes:

1. Test all the individual components in the second dispatch (current, voltage, time, differential, balance, negative sequence, distance, power direction, inverse time limit, frequency, synchronization, reclosing and other relays)

2. The entire transmission group can simulate various simple or complex transient, permanent and transition faults, and can superimpose the transient DC component on the fundamental wave.

3. Harmonics can be superimposed randomly, and the initial angle and content of superposition can be controlled online.

4. It can be divided into different frequency output AC and DC.

5. The special low-frequency unit can easily test the low-voltage load protection of low-voltage microcomputer protection.

6. Automatically scan various protection time features. Scan power and impedance protection characteristic curves.

7. Automatically test the differential ratio and harmonic braking characteristics of the microcomputer main transformer protection. .

8. The user-programmable test unit can meet special test purposes, and the self-test equipment can be self-checked.

9. Motor demagnetization out of step, anti-excitation, reverse power and synchronization protection test.

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