Recently, the Wuhan ultra-high voltage after-sales technical team received an invitation to go to Beijing to provide after-sales training for customers. The equipment that needs training this time is the UHV series lightning impulse voltage generator test device, which is used for conducting lightning impulse voltage full wave, lightning impulse voltage cutoff, and operation impulse voltage wave impulse voltage tests on power equipment and other test objects to test insulation performance.
After arriving at the site, the technical personnel unpacked and assembled the testing instrument. Due to the customer only conducting full wave tests, the instrument is equipped with a control console, an impact divider, and an impact generator body. And according to the requirements, discharge ball system partitions, pressure equalization rings, and dual screen displays have been added.
The impulse voltage test system is a testing equipment that simulates pulse high voltage. According to the standard requirements, it conducts various impulse voltage tests on transformers, reactors, transformers, and other high-voltage electrical appliances, high-voltage thyristor valves (SVCs), power cables, various high-voltage insulators, bushings, and other specimens, including standard lightning impulse, lightning cutoff wave, operation impulse, and non-standard impulse wave required by users. After assembling the equipment, it is necessary to perform ball system debugging on the device. Firstly, the negative polarity output of 10kV, 20kV, 30kV, 40kV, 50kV, 60kV, and 70kV should be debugged step by step. After debugging is completed, the positive polarity should be debugged in the same way.
After all debugging is completed, technicians begin to explain the lightning impulse voltage generator test device. Special attention should be paid here, as the effective efficiency of the device is over 90%. Therefore, the output voltage is not the test voltage, and it needs to be calculated based on the number of levels used and the actual test voltage. The calculated output voltage should be filled in the settings.
The device ball system adjustment has manual mode and automatic mode. After debugging, there is no need to adjust it in future tests. The instrument has multiple protection functions, emergency stop protection, voltage output lock, safety switch, and so on.
After introducing the instrument, start practical operation. We have selected a 10kV circuit breaker for on-site operation. The test voltage is 40kV. A 2-layer structure is selected for the test, and the required test voltage is 40kV. After calculation, the output is set to 21 kV. The test results show that T1/1.08 microseconds, T2/50.51 microseconds, and voltage are -40.42 kV. According to the national standard requirements, the experimental results T1 shall not exceed 30% and T2 shall not exceed 20%, indicating the completion of the experiment.
In the explanation provided by the after-sales technical personnel of Wuhan ultra-high voltage, the customer was quickly able to independently use the equipment for testing. The on-site personnel of the customer also highly recognized Wuhan ultra-high voltage instruments and services! Wuhan UHV provides after-sales technical support. No matter when you purchase Wuhan UHV instruments, Wuhan UHV will provide professional consulting services to help you solve any problems!
