II. Precautions for Lightning Protection Component Tester
1. Connect the working circuit according to the test you are conducting. The casing of the test transformer and the casing of the operating system must be reliably grounded. The X terminal (high-voltage tail) of the high-voltage winding of the test transformer and the F terminal of the measuring winding must be reliably grounded.
2. When conducting cascade tests, the X terminal of the low-voltage winding, the F terminal of the measuring winding, and the X terminal (high-voltage tail) of the high-voltage winding of the second and third stage test transformers are all connected to the casing of the respective stage test transformer. The casings of the second and third stage test transformers must be grounded through insulating supports.
3. Before turning on the power, the voltage regulator of the operating system must be adjusted to the zero position before switching on the power, closing the switch, and starting to increase the voltage.
4. Rotate the handwheel of the voltage regulator evenly from zero to increase the voltage. The methods for increasing voltage include: the rapid voltage increase method, which is the 20-second step-by-step voltage increase method; the slow voltage increase method, which is the 60-second step-by-step voltage increase method; and the extremely slow voltage increase method for selection. After the voltage rises from zero according to a certain voltage increase method and speed to 75% of the rated test voltage you need, then increase the voltage at a speed of 2% of the rated test voltage per second to the required rated voltage, and closely monitor the indications of the measuring instruments and the condition of the test object. If any abnormality is found in the indications of the measuring instruments or the condition of the test object during the voltage increase process or during the test, immediately reduce the voltage, cut off the power, and investigate the situation.
5. After the test is completed, return the voltage regulator to the zero position uniformly within a few seconds, and then cut off the power.
6. This product must not be used beyond its rated parameters. Except for necessary tests, full voltage energization or de-energization is absolutely not allowed.
7. When using this product for high-voltage tests, in addition to being familiar with this manual, you must strictly implement relevant national standards and operating procedures. Reference can be made to GB311-83 "Insulation Coordination of High-Voltage Transmission and Transformation Equipment, High-Voltage Test Techniques" and "Regulations for Preventive Tests of Electrical Equipment", etc.
