Precautions for power frequency withstand voltage test:
1. Testers should divide their responsibilities, set a safe distance at the test site, carefully inspect the grounding of the tested object and the test transformer, and assign dedicated personnel to monitor safety and observe the status of the tested object.
2. The main parts of the test object should be cleaned and kept dry to avoid damage to the test object and errors in the test values.
3. For the testing of large equipment, it is generally necessary to first conduct an air lift test of the test transformer, that is, boost the voltage to the test voltage when the test object is not connected, in order to calibrate the indication accuracy of the instrument and adjust the ball spacing of the discharge ball gap.
4. When conducting a voltage withstand test, the boosting speed should not be too fast and sudden pressurization should be avoided. For example, if the voltage regulator is not at zero, it should not suddenly close or power off. Generally, it should be closed when the voltage regulator is lowered to zero.
5. During the boost or withstand voltage test, if any of the following abnormal situations are found: 1. The pointer of the voltage and current meter swings greatly, 2. The tested object makes abnormal noise, 3. If insulation is burnt or smokes, the voltage should be immediately reduced, the power should be cut off, the test should be stopped, and the cause should be identified.
6. When using this product for high-voltage testing, in addition to being familiar with this manual, it is also necessary to strictly comply with relevant national standards and operating procedures.
7. When conducting capacitance experiments or DC high-voltage leakage experiments, after the experiment is completed, lower the voltage regulator to the zero position and cut off the power supply. Then, use a discharge rod to discharge the high-voltage end of the test object or capacitor to the ground to avoid the risk of electric shock caused by the potential stored in the capacitor.
8. Several safety precautions for power frequency withstand voltage test. In the experiment, if the test object is short circuited or faulty, the overcurrent relay in the control box will operate. At this moment, the voltage regulator should be returned to the zero position and the power supply should be cut off before the test object can be taken out.
The ZC-500 power frequency withstand voltage control box adopts CNC technology and has strong anti-interference ability. Compared with the previous generation of operation boxes, it has the characteristics of small size, light weight, and beautiful appearance. Its output voltage amplitude is continuously adjustable from 0 to 250V, used for voltage regulation control of calibration, detection, and testing equipment. The operation box is simple, compact, sturdy, reliable, and easy to maintain. It is an ideal control equipment for outdoor high-voltage testing and can be widely used in industries such as power, water conservancy, chemical, railway, and laboratories.
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.
