The main protective measures for DC high-voltage generators include the following:
1. Internal voltage measurement circuit open circuit protection: When the internal pressure measurement resistor is open, the voltage measurement signal line is open, or the cable terminal is poorly connected, if there is no protection, the instrument voltmeter will not indicate, but there is still voltage at the high voltage end, which may cause personal injury accidents. Therefore, this protection mechanism can prevent such situations from occurring.
2. Overcurrent protection: When a short circuit occurs at the high-voltage output terminal, the instrument should immediately cut off the output to avoid damage to the instrument. This ensures that in abnormal situations, the device can quickly respond and protect itself from damage.
3. Overvoltage protection: When the high voltage output exceeds the overvoltage setting value, the instrument should immediately automatically cut off the output to ensure that the measured object will not be damaged due to overvoltage. This feature is crucial for protecting test objects and ensuring the accuracy of test results.
4. Zero position protection: The potentiometer should be zeroed and boosted to prevent the high voltage end from being charged, thereby avoiding harm to the human body and the instrument. This requires that the potentiometer be in zero position before using the equipment to ensure safe operation.
5. Grounding protection: When the DC high-voltage generator is not grounded or poorly grounded, the instrument should have a grounding alarm and corresponding prompt, and cannot boost the voltage to prevent harm to the human body and the high-voltage DC generator. This protection mechanism can ensure the grounding safety of the equipment during use.
In addition, some advanced DC high-voltage generators also have other protection functions, such as ungrounded protection, zero crossing protection, etc., to provide more comprehensive safety protection. In order to ensure the normal operation of equipment and the safety of personnel, the operating procedures should be strictly followed when using a DC high-voltage generator, and regular inspections and maintenance should be carried out.
ZC-540A DC high-voltage generator is mainly suitable for conducting DC withstand voltage tests on high-voltage electrical equipment such as zinc oxide lightning arresters, magnetic blowing lightning arresters, power cables, generators, transformers, switches, etc. in the power sector, power departments of factories and mining enterprises, scientific research institutions, railways, chemical industries, power plants, etc. The instrument adopts an intermediate frequency voltage doubling circuit and PWM intermediate frequency pulse width modulation technology, which greatly improves voltage stability. According to electromagnetic compatibility theory, special shielding, isolation, and grounding measures are adopted to discharge the DC high-voltage generator at rated voltage without damaging the instrument.
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