Ultra Low Frequency High Voltage Cable Hipot Test Unit

Model NO.
VLF30
Output Frequency
0.1Hz, 0.05Hz, 0.02Hz
Output Voltage
30kv, 50kv, 60kv, 80kv or Others
Power Source
AC220V
Accuracy Grade
0.5
Transport Package
Packed in Container
Specification
packing in 3 cases
Trademark
GOLD
Origin
Chongqing
HS Code
9031809090
Production Capacity
100PCS/Month Hipot Tester
Reference Price
$ 2,160.00 - 2,340.00
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Product Description

Ultra Low Frequency High Voltage Cable Hipot Test Unit

Ultra Low Frequency High Voltage Cable Hipot Test Unit

VLF testing uses very low frequencies as part of an AC cable maintenance routine. VLF testers are smaller and more practical than AC testers but output the same amount of power as a 50 Hz mains device. This combination of size and power makes Very Low Frequency cable testing perfect for testing longer sections of cable and apparatus. 
AC is the standard used to transmit power worldwide, usually at a frequency of 50 or 60 Hertz. While supplies to railways and aircraft may use 162/3 or 400Hz, it is still a sinusoidal voltage waveform. A VLF test is ideal for working within these parameters.
Transmitting power with an alternating current is not as efficient as with a direct current however: while all power transmission lines and cable networks do have the side effect of DC resistance loss to the supply voltage, the level of capacitive loss is even higher. This is largely due to the inherent coupling between the phases involved. As a result, generating systems must supply enough energy to meet user demand as well as compensate for the large losses stemming from the transmission process. The small size and high power of the VLF tester helps to solve the practical problem of transmission loss during an AC test on very long sections of cable and apparatus in the field.
This equipment negates the need for on-site generation, large step down transformers or generating company supplies to be employed to power the items under test.
Because VLF testing supplies a working frequency of 0.1Hz as opposed to the 50/60Hz usually required for live transmission, the physical size of the VLF test set is massively reduced. Critically, the test object still receives the Alternating Sinusoidal Voltage that would be supplied through everyday use, but the size of the test equipment is much smaller.

 VLF Hipot Tester Parameters:

TypeOutput
Voltage/
Current		Load CapacityControl UnitBoosterFuse 
Tube
Frequency/
Capacitance		Dim.
(cm)		Wt
(kg)		Dim.
(cm)		Wt
(kg)
VLF-3030KV/20mA0.1Hz ≤ 1.1uF
0.05Hz ≤ 2.2uF
0.02Hz ≤ 5.5uF		28× 37× 22433× 18× 34255A
VLF-4040KV/30mA0.1Hz ≤ 1.1uF
0.05Hz ≤ 2.2uF
0.02Hz ≤ 5.5uF		28× 37× 22435× 20× 36356A
VLF-5050KV/40mA0.1Hz ≤ 1.1uF
0.05Hz ≤ 2.2uF
0.02Hz ≤ 5.5uF		28× 37× 22437× 24× 39457A
VLF-6060KV/50mA0.1Hz ≤ 1.1uF
0.05Hz ≤ 2.2uF
0.02Hz ≤ 5.5uF		28× 37× 22433× 18× 34
33× 18× 34		25+2510A
VLF-7070KV/55mA0.1 Hz, ≤ 0.5µ F
0.05Hz, ≤ 1.0µ F
0.02Hz, ≤ 2.5µ F		28× 37× 22433× 18× 34
35× 20× 36		25+3510A
VLF-8080KV/60mA0.1 Hz, ≤ 0.5µ F
0.05Hz, ≤ 1.0µ F
0.02Hz, ≤ 2.5µ F		28× 37× 22433× 18× 34
37× 24× 39		25+4512A

 

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.
More details for Vlf hipot tester

Ultra Low Frequency High Voltage Cable Hipot Test UnitUltra Low Frequency High Voltage Cable Hipot Test Unit

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