Nippon Kernel System CO., LTD. List of Products and Services

The "Multi-Output Constant Current Power Supply" operates as a current source, unlike a typical voltage source, allowing it to continuously output a constant current value and waveform even when the impedance of the device under test changes. By connecting multiple units in parallel, it can accommodate various requirements such as high capacity and large currents by using an external step-down transformer. It is also possible to create test benches for circuit breakers and other devices. It is suitable for tests and verifications that require reference current waveforms, such as circuit breaker energization tests, CT accuracy tests, and current inputs for power meters. With three output terminals and phase control for each output, it can provide single-phase or three-phase output with a single unit. Additionally, it has the capability to superimpose harmonics up to the 20th order for each output, allowing for distortion control. 【Features】 - Operates as a constant current source even in short-circuit conditions, enabling large current tests with minimal power supply during virtual load testing. - Capable of superimposing harmonics up to the 20th order. - Outputs low distortion current waveforms with a total harmonic distortion of 0.5% or less (at rated output). - Complies with JIS standard tests with a single unit. - Supports 200% energization tests on circuit breaker production lines. - Response time (time to reach set value) is less than 200 ms. *For more details, please feel free to contact us.

- Test system for detailed performance evaluation of various circuit breakers - Confirming whether the circuit breaker properly performs the tripping operation when subjected to overcurrent - Applying the specified leakage current to verify whether the residual current device operates correctly - Test system for conducting standard tests as specified in JIS C8201-2-2: 2021 - Filters and load devices used for standard tests as specified in IEC63027

Specifically, the following three tests can be conducted: operating time test, sensitivity current test, and leakage current operation test (only power switching and time measurement).

It consists of a Decoupling Network to eliminate noise from the DC power supply used in the test, an Array Impedance to simulate the impedance of the PV array, and a Line Impedance to simulate the circuit from the PV to the power converter.

■Sensitivity current test ■Operating time test ■Single-phase fault operation overvoltage test ■High-frequency superposition test ■Frequency sweep test, etc., are conducted automatically! Since manual machine operation is not required, the test results do not vary depending on the tester, which helps prevent the personalization of tests. ●Complies with JIS C 8201-2-2 (IEC 60947-2) standard tests ●Select the test items to be conducted via software and input the test conditions to automatically perform the tests ●Achieves a speed test from start to finish, including result display, in as fast as 5.5 seconds ●Test results are automatically converted to CSV format, allowing for time-saving in report management ●Real-time measurement of test current, voltage, and time using a power meter and waveform recorder. After completion, the values at the trip time and the waveforms before and after the trip are displayed on the software screen ●The test circuit and measurement values are displayed on the software screen, enabling smooth testing while understanding the circuit configuration.