The high-voltage electrical testing equipment in substations is mainly used for withstand voltage testing, leakage current testing, insulation resistance testing, etc. of equipment insulation performance. Here are several common testing equipment:
1. DC high voltage generator: used for DC withstand voltage and DC leakage measurement, as well as DC reference voltage and DC/leakage current testing of lightning arresters.
2. Variable frequency resonant withstand voltage test device: used for AC withstand voltage testing of substation main transformers and equipment, capable of providing up to power frequency voltage.
3. Test transformers: such as dry-type test transformers and insulated cylinder test transformers, used for voltage withstand testing of electrical equipment
In addition, there are secondary equipment used to measure electrical parameters in circuits, such as voltmeters, ammeters, power meters, energy meters, etc., as well as equipment used to control, protect, monitor, and measure the operation of primary equipment, such as measuring instruments, relays, operating switches, buttons, automatic control equipment, etc.
These devices play a crucial role in high-voltage electrical testing, as they can help operators accurately evaluate the insulation performance and quality of insulation materials, thereby ensuring the safe operation of the equipment. At the same time, these devices also have automatic protection functions, which can automatically shut down in case of abnormal situations, avoiding equipment damage or operator injury.