Principles for the use of high current generators

The large current generator can be used as a large current test device or primary current injection test is a Preventive maintenance technology. The performance of circuit breakers installed in electrical or automation systems is evaluated by injecting current. Due to the crucial importance of circuit breakers for the overall safety and understanding of equipment, various tests and investigations have been conducted to identify their problems, with current injection being the most common and popular. This test helps identify and monitor circuit breakers with poor performance and their Protective relay and equipment to ensure that the efficiency of the electrical system is maintained even under peak load. Typically, high current tests are used to verify current transformers (CT), potential or Voltage transformer (PT or VT), switchgear, relays.

Working principles:

Current injection testing is used to inject current into the primary and secondary sides of the electrical system to check protective equipment. The purpose of these tests is to test the reliability and efficiency of electrical systems (mainly protective equipment such as circuit breakers), and to help identify any defective equipment. According to the current amplitude and injection direction, the current testing device is divided into primary and secondary. Both primary and secondary testing devices operate based on the same principle of simulating real excitation current to verify whether the circuit breaker trips at its design limit and how long the current needs to flow before initiating the trip (activation time).

The type of high current group: Both primary and secondary current injection tests can be used for industrial purposes, and selection is made based on the application and objectives of the test.

Primary or high current testing devices: Primary current testing devices are used for high current/high voltage applications, typically in large electrical installations such as substations. These testing devices operate by injecting a current within the range of 100A to 20000A (depending on the circuit breaker specifications) directly into the primary side of the electrical system (such as the circuit breaker) to test its load-bearing capacity. Unlike secondary current testing devices that only test electronic circuit breakers, primary current testing is used for thermal magnetic circuit breakers and electronic circuit breakers. Modern high current testing devices are integrated with cable terminals, timers, temperature indicators, contractors, independent phase control, and other accessories. They can determine the health status of the CT and the wiring conditions from the CT to the release.

The ZC-510 series high current generator is a current source used for inspection, which is a low-voltage high current power supply for thermal and dynamic stability tests of electrical appliances, such as temperature rise tests and tripping of air circuit breakers, contactors, and relays. When measuring three phases using a single-phase high current generator, it should be carried out separately; The three-phase large current generator is mainly used for testing three-phase electrical products, and can also be used for testing single-phase electrical products. The control scheme of three-phase and single-phase large current generators is the same, except that the three-phase large current generator outputs three-phase current. The large current generator consists of transformer, Pressure regulator and control. The KST-510 series high current generator is a specialized equipment designed and manufactured for electrical equipment testing in the power sector and industrial and mining enterprises. It is suitable for current load testing and temperature rise testing of various switches, current transformers, and other electrical equipment.

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.