Key points for operating a voltage tester

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A voltage withstanding tester is a commonly used testing instrument, primarily employed for testing the voltage withstanding capacity of power cables with polyethylene insulation; it can also be used for testing the insulation voltage withstanding capacity of large power transformers. The A1160 dielectric strength tester complies with GB/T507 and DL/T429.9 standards, and is used to determine the degree of physical contamination of insulating oil by water and other suspended substances. The testing method involves placing the oil sample in a specialized device and exposing it to an alternating electric field whose voltage increases uniformly at a certain rate, until the oil breaks down. It can be widely applied in industries such as electricity, petroleum, and chemicals. 　　Advantages of the voltage withstand tester:
Controlled by a dual-CPU microcomputer.
A range of operations such as voltage raising, returning to zero, stirring, display, calculation, and printing are carried out automatically.
It is equipped with protection mechanisms against overvoltage, overcurrent, and automatic return to zero, ensuring safety and reliability.
An automatic sine wave generator and stepless voltage regulation are used to generate voltage, resulting in a more stable and reliable testing voltage.
Two voltage raising speeds, 2 KV/S and 3 KV/S, are available for selection, offering greater flexibility.
Data is stored automatically and can be retrieved and printed at any time.
It features an advanced dry-type transformer design, making it compact, lightweight, and easy to use.

Precautions for using the voltage withstand tester:
1. Personnel working with this equipment must be familiar with its various functions and operating requirements. Those who are not qualified to operate it should not do so. Operators should wear insulating rubber mats under their feet and insulating gloves to prevent life-threatening electric shock from high voltages. 　　2. The instrument must be properly grounded. When connecting the device to be tested, it is essential to ensure that the high-voltage output is at “0” and in the “reset” state.
3. During testing, the grounding terminal of the instrument must be firmly connected to the device being tested; an open circuit is strictly prohibited.
4. Do not short-circuit the output ground wire with the AC power line, as this could cause high voltage to appear on the enclosure, posing a danger.
5. Try to avoid short-circuiting the high-voltage output terminal with the ground wire to prevent accidents.
6. If the test light or over-leakage indicator gets damaged, it must be replaced immediately to avoid incorrect readings.
7. When troubleshooting faults, the power supply must be turned off. It is forbidden to connect or disconnect wires from the device being tested while it is under powered, nor should one touch the device or the wires.
8. When adjusting the high voltage with the instrument unloaded, a certain starting current will appear on the leakage current meter, which is normal and does not affect the accuracy of the tests.
9. Keep the instrument away from direct sunlight, and do not use or store it in environments that are hot, humid, or dusty.