High Voltage Very Low Frequency AC Hipot Tester Electrical Equipment Testing

• After-sales Service: Yes
• Warranty: 1 Year for High Voltage Very Low Frequency AC Hipo
• Product Name: Vlf Hi Pot Test Hv High Voltage Very Low Frequency
• Power Supply: 220V 50Hz
• Accuracy Grade: 0.5
• Power Source: AC220V
• Model NO.: VLF
• Output Frequency: 0.1Hz, 0.05Hz, 0.02Hz
• Output Voltage: 30kv, 50kv, 60kv, 80kv or Others
• Capacity: 0.6kVA ~ 2.4kVA
• Loading Method: Static Load
• Transport Package: Packed in Container
• Specification: packing in 3 cases
• Trademark: GOLD
• Origin: Chongqing
• HS Code: 9031809090
• Production Capacity: 100PCS/Month Hipot Tester

Product Description

High Voltage Very Low Frequency AC Hipot Tester

Introduction:

A Very Low Frequency AC Hipot Tester is a type of AC output tester that applies an AC voltage to a capacitive load, such as a long cable or a large generator, with an output frequency of 0.1 Hz or lower.The tester is designed to verify the AC integrity of a cable or other equipment by conducting a voltage withstand test, which is essentially an alternative to the traditional power frequency withstand voltage test.

Compared to a power frequency hipot tester, a VLF hipot tester requires much less current and power to apply an AC voltage to a capacitive load. For example, at 0.1 Hz output, it takes 600 times less current and power to test a cable than at 60 Hz. This is because the lower the frequency of an AC source, the lower the current and power required to apply a voltage to a capacitive load like a cable.

A VLF AC Hipot Tester can be used to field test high capacitance loads like cables and motors/generators, and is especially valuable for verifying a cable after installation or repair. It is recommended to use an AC voltage test with a VLF tester to verify the AC integrity of a cable, as it is the best way to detect any defects that may cause in-service failure.

A VLF AC Hipot Tester is fully automated in voltage rise, voltage drop, measurement, and protection, and can be controlled by a microcomputer. The output voltage, current, and waveform data are directly sampled from the high voltage side, ensuring accurate data.The tester also has overvoltage and overcurrent protection functions, and the high-voltage output protection resistor is designed in the booster body, eliminating the need for an external protection resistor.

VLF AC Hipot Testers are widely available from various manufacturers and can be purchased in different models with different voltage levels, such as 80kV, 50kV, or 30kV.The testers can be used for a variety of field and repair shop HV testing applications, and are designed to be portable and affordable.

 VLF Hipot Tester Parameters:

Type	Output Voltage/ Current	Load Capacity	Control Unit		Booster		Fuse  Tube
		Frequency/ Capacitance	Dim. (cm)	Wt (kg)	Dim. (cm)	Wt (kg)
VLF-30	30KV/20mA	0.1Hz ≤ 1.1uF 0.05Hz ≤ 2.2uF 0.02Hz ≤ 5.5uF	28× 37× 22	4	33× 18× 34	25	5A
VLF-40	40KV/30mA	0.1Hz ≤ 1.1uF 0.05Hz ≤ 2.2uF 0.02Hz ≤ 5.5uF	28× 37× 22	4	35× 20× 36	35	6A
VLF-50	50KV/40mA	0.1Hz ≤ 1.1uF 0.05Hz ≤ 2.2uF 0.02Hz ≤ 5.5uF	28× 37× 22	4	37× 24× 39	45	7A
VLF-60	60KV/50mA	0.1Hz ≤ 1.1uF 0.05Hz ≤ 2.2uF 0.02Hz ≤ 5.5uF	28× 37× 22	4	33× 18× 34 33× 18× 34	25+25	10A
VLF-70	70KV/55mA	0.1 Hz, ≤ 0.5µ F 0.05Hz, ≤ 1.0µ F 0.02Hz, ≤ 2.5µ F	28× 37× 22	4	33× 18× 34 35× 20× 36	25+35	10A
VLF-80	80KV/60mA	0.1 Hz, ≤ 0.5µ F 0.05Hz, ≤ 1.0µ F 0.02Hz, ≤ 2.5µ F	28× 37× 22	4	33× 18× 34 37× 24× 39	25+45	12A

VLF Hipot Tester Features:

1. Data of current, voltage, wave form can be directly sampled at high voltage side, so the data is real and accurate.  
2. Overvoltage protection: If the output exceeds the set limit of voltage, the instrument will shut-down to protect itself, the actuation time is less than 20ms.
3. Overcurrent protection: it is high-low voltage dual protection in the design, the accurate shut-down protection can be made according to the set value at high voltage side; If the current on low voltage side exceeds the rated current, the instrument will take shut-down protection, the actuation time are both less than 20ms.
4. A high voltage output protective resistor is provided in the voltage boost body in the design and this eliminates the need of additional protective resistor connected outside.  

 

Notes:

• Power supply requirement: AC50Hz, 220V, stability of frequency: fluctuation less than 0.5%.
• When using it, the capacitance of the sample should not exceed the rated capacity of the instrument. The overlow capacitance of the sample will affect the output wave form. If the capacitance is less than 0.05µF, the instrument cannot output normally.
• When using it, it is prohibited to boost voltage without load, or to connect with resistive load.

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