VLF-30 Very Low Frequency Insulation Withstand Voltage Test Set - Yangzhou Darui

VLF-30 Very Low Frequency Insulation Withstand Voltage Test Set - Yangzhou Darui

Published: 2020-08-13 15:00:00

Category: VLF Insulation Withstand Test

Product Description

VLF-30 Very Low Frequency Insulation Withstand Voltage Test Set

Darui Electric recommends:

Very Low Frequency Insulation Withstand Voltage Test Set is actually an alternative method to power frequency withstand voltage test. As we know, when conducting power frequency withstand voltage tests on large generators, cables, and other test objects, due to their insulation layers exhibiting large capacitance, a transformer or resonant transformer with a large capacity is required. It can be widely used in AC withstand voltage tests for cables, large high-voltage rotating motors, and power capacitors.

I. Series Products and Selection

1. Naming Explanation

××—30/1.1

                   Rated load capacitance, unitµF

                   Rated output peak voltage, unit kV

                   Product letter code

2,30KV Very Low Frequency                         Table 1

Model	Rated Voltage	Load Capacity	Power Fuse	Weight	Application
30/1.1	30kV (peak)	0.1Hz,≤1.1µF	10A	Controller: 4kg Voltage booster: 25kg	10KV cables, generators
		0.05Hz,≤2.2µF
		0.02Hz,≤5.5µF

3,Select appropriate specifications according to the test object.

When in use, the capacitance of the test object must not exceed the rated capacity of the instrument. If the capacitance is too small, it will affect the output waveform. If it is less than 0.05µF, the instrument will not output normally. A 0.1 µF capacitor can be connected in parallel for auxiliary output.The following are capacitances of some equipment for user reference.

★    Current and voltage data are directly obtained through sampling on the high-voltage side, so the data is real and accurate.

★    Overvoltage protection: When the output exceeds the set voltage limit, the instrument will shut down for protection, with an action time of less than 20ms.

★    Overcurrent protection: Designed with dual protection on both high and low voltage sides. The high-voltage side can perform precise shutdown protection according to the set value;

when the current on the low-voltage side exceeds the rated current, shutdown protection will be triggered, with action times less than 20ms.

★ The high-voltage output protection resistor is designed inside the voltage booster, so no external protection resistor is needed.

★    Due to the adoption of a closed-loop negative feedback control circuit for both high and low voltage, there is no capacitive rise effect in the output.

IV. Technical Parameters

1,Rated output voltage: see Table 1

2,Output frequency: 0.1Hz, 0.05Hz, 0.01Hz.

3,Load capacity: see Table 1    0.1 Hz max 1.1µF

0.05 Hz max 2.2µF

0.02 Hz max 5.5µF

Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.

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Product Details

VLF-30 Very Low Frequency Insulation Withstand Voltage Test Set - Yangzhou Darui