Analysis of Four Common Fault Causes of DC High Voltage Generators

The DC high-voltage generator is an instrument that provides a high-voltage DC source and is an essential equipment for high-voltage testing, specifically used for conducting DC withstand voltage tests. The instrument should be designed and produced using intermediate frequency modulation technology, and the use of step-up DC high-voltage generators for power frequency transformers should be prohibited; Having comprehensive technical measures for moisture-proof and shockproof measures; Equipped with automatic protection devices for overvoltage and overcurrent. When abnormal working conditions occur, the automatic protection device should automatically shut down the DC high-voltage generator; The display screen should have a backlight display, which is clear and easy to distinguish within the range of use, and meets the needs of on-site use; Adopting advanced electromagnetic compatibility design, the entire machine can withstand on-site ground discharge impact; Have measures and capabilities to resist electromagnetic interference and forward and reverse impacts.

When using a DC high-voltage generator, users must comply with Article 168 of the Electric Power Safety Regulations and install two obvious disconnection points before the working power enters the tester. When replacing the test object and wiring, the two power disconnection points should be clearly disconnected first. At least three staff members must be present on site to effectively ensure the safety of users.

Let’s take a look at the causes and solutions of the malfunction of the DC high-voltage generator:

1. Phenomenon: After the power switch is turned on, the green light does not light up and the fan does not turn.

Reason: The power cord is open circuit. The power fuse is blown.

Handling: Replace the power cord. Replace the fuse.

2. Phenomenon: The red button light does not turn on.

Reason: The voltage regulating potentiometer did not return to zero.

Handling: The potentiometer returns to zero.

3. Phenomenon: Press the red button to turn on the light, the red light will turn off once the voltage is increased, and the green light will turn on.

Reason: The high-voltage output terminal is grounded or the test object is short circuited.

Handling: Check the output cable. Inspect the test object.

4. Phenomenon: During the boosting process, the red light is off and the green light is on.

Reason: Discharge or breakdown of the test object, overvoltage or overcurrent protection action.

Handling: Check the test object. Reset the setting value.

ZC-540A Dc high voltage generator adopts high frequency pulse width modulation (PWM) technology to make closed adjustment with high voltage stability, small ripple factor and fast reliable protection circuit. The wide temperature LCD screen adopts green back light, which enables clear display either in bright light or in darkness. High-pressure components use Dupont new filling material, making the product more stable and reliable. Products are widely used in electricity power supply departments, power transmission and transformation engineering company and preventive test of large industrial enterprises and scientific research institutes as regulated dc high voltage power supply.

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. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com