(usually between 0.01Hz and 0.1Hz) of AC high voltage. This device is mainly used for insulation withstand voltage tests of electrical equipment, especially for those with large capacitive characteristics, such as large generators, cables, and power capacitors.
Here are some key points about the ultra-low frequency high voltage generator:
Technical principle: Through frequency conversion technology and digital control methods, the power frequency power supply is converted into an ultra-low frequency power supply, and then boosted to the required test voltage through a step-up transformer.
Application fields:
Withstand voltage test of cables.
AC withstand voltage test of large high-voltage rotating motors.
Other large-capacity electrical equipment that requires ultra-low frequency insulation testing.
Advantages:
The equipment is small in size and light in weight, making it easy to carry and operate.
Compared with power frequency withstand voltage testing, test equipment with smaller capacity can be used.
High output waveform quality with low waveform distortion.
Equipped with multiple protection functions, such as overvoltage protection and overcurrent protection, to ensure safe operation.
Technical parameters: The output rated voltage range varies from 30kV to 90kV, the output frequencies include 0.1Hz, 0.05Hz, 0.02Hz, etc., the load capacity varies according to the frequency, the measurement accuracy is about 3%, and it can work stably within the temperature range of -10℃ to +40℃.
Operating instructions: Usually include detailed wiring methods, setting limit parameters, operating procedures, and guidance on how to handle unexpected situations. In addition, test methods specific to different test objects (such as cables or generators) are also provided.
Industry standards and specifications: The design indicators of these devices comply with industry standards such as "General Technical Conditions for Special Testing Instruments for Power Equipment".
Precautions: When using, attention should be paid to correct wiring methods, safety measures, and sufficient discharge of the test object.
The ultra-low frequency high voltage generator is one of the important tools for insulation preventive testing in modern power systems, and its development reflects the progress of power electronics technology. If you have more specific questions or need further information, please feel free to tell me.
