What is a digital relay protection tester?

A digital relay protection tester is a power test device that uses single-chip microcomputer technology and integrates multiple test functions. It is mainly used to calibrate and test various relay protection devices in the power system to ensure that these devices can act quickly and accurately when a fault occurs in the power system to protect power equipment and personal safety.

1. Main functional features

① High-precision testing: The digital relay protection tester uses a high-precision data acquisition and processing unit to generate accurate simulated power system current and voltage signals to ensure the accuracy of the test results.

② Multi-function integration: The tester integrates an automatic synchronous digital millisecond meter, a logic control unit, a multi-function digital display unit, a current/voltage output unit, an overload and over-range protection unit, etc., and can complete a variety of test tasks.

③ Fully automatic testing: The test process is fully automatic. The user only needs to set the test parameters, and the tester can automatically test according to the preset program, which greatly improves the test efficiency.

④ Flexible adjustment: The tester provides precise parameter adjustment function. Users can adjust the current, voltage, phase, frequency and other parameters according to test requirements to simulate different power system conditions.

⑤ Fault simulation: It can simulate various power system faults, such as three-phase short circuit, two-phase short circuit, single-phase grounding, etc., to verify the performance of the relay protection device under fault conditions.

⑥ Recording and playback: Advanced testers also have recording and playback functions, which can record the current and voltage waveforms in the actual power system and play back these waveforms during the test to verify the performance of the relay protection device.

2. Technical features

① High-performance processor: The use of high-performance processors (such as PowerPC processors) and large-scale FPGA technology ensures that the tester has powerful data processing capabilities and precise control accuracy.

② Multi-interface support: Supports multiple interfaces and communication protocols (such as Ethernet, USB, serial port, etc.), convenient for connecting external devices such as computers and oscilloscopes, and realizing data transmission and remote control.

③ Optical digital signal access: Supports IEC60044-8 (FT3), IEC61850-9-1, IEC61850-9-2 and GOOSE optical digital signal access, providing a complete test solution for IEC61850 relay protection devices, IEDs, etc.

④ Network fault simulation: It can perform various network fault simulation tests such as frame loss, sequence error, step loss, network congestion, etc., and judge the performance of protection devices under various abnormal conditions.

3. Application fields

Digital relay protection tester is widely used in power systems, industrial automation, rail transportation, intelligent buildings and other fields. In the power system, it is mainly used to test and verify the relay protection devices of transmission lines, generators, transformers and other equipment to ensure the safe and reliable operation of the power system.

In summary, the digital relay protection tester is a powerful, high-precision, and easy-to-operate power test equipment, which is of great significance to ensure the safe and stable operation of the power system.

The ZC-702 three-phase relay protection tester comes with a large-screen LCD display and a flexible and convenient rotating mouse controller. It has powerful functions when operated independently and can perform most tests. It has more powerful operating functions when connected to a computer. It is small in size and high in precision. It has the advantages of large testers, advanced functions, small testers, small and flexible, easy to operate, high reliability, and high performance-price ratio. It is a good tool for relay protection workers.

In addition to calibrating various relays (such as current, voltage, inverse time, power direction, impedance, differential, low frequency, synchronous, frequency, DC, intermediate, time, etc.) and microcomputer protection, it can also simulate single-phase to three-phase instantaneous, permanent, and conversion faults for a whole group of tests. It can also complete various large-scale and complex calibration tasks with a high degree of automation, automatically test and scan various protection settings, store test data in real time, display vector diagrams, and print reports online.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com