HVHIPOT GDVLF-80S 30kV 50kV 60kV 80kV VLF AC Hipot Test Set

• Customization: Available
• After-sales Service: yes
• Warranty: 1 year
• Model NO.: GDVLF-80S
• Type: Universal Testing Machine
• Accuracy Grade: 0.5
• Load Way: Electronic Load
• Loading Method: Dynamic Load
• Display: Digital
• Control: Computer Control
• Weight: 0-100Kg
• Power Source: AC220V
• Peak voltage: 80kV
• Test frequency: 0.1Hz, 0.05Hz and 0.02 Hz (selectable)
• Test object: power cable
• Transport Package: Standard Plywood Case
• Specification: ISO9001
• Trademark: HV HIPOT
• Origin: Wuhan, China
• Production Capacity: 3000PCS/Year

Product Description

GDVLF-80S VLF AC Hipot Test Set

I. General Information

Withstand voltage test is an essential preventive test for electrical equipment. It is divided into two parts: AC and DC withstand voltage test. AC test can be further divided into power frequency, variable frequency and 0.1Hz very low frequency test, among which the last one is highly recommended by IEC, due to its remarkable advantages.

Following is a comparison for DC, Power Frequency, Variable Frequency, and 0.1Hz test.

Aspects	DC	Power Frequency	Variable Frequency	0.1Hz
Equivalency	poor	good	good	good
Insulation Damage	strong	slight	slight	slight
Operation Safety	relatively low	relatively low	relatively low	high
Wiring Difficulty	complicated	complicated	most complicated	simple
Volume	smallest	largest	large	small

In fact, VLF test is the substitute for power frequency test. It is suitable for testing electrical equipment with large capacitance.

The latest VLF AC Hipot Test Set uses the latest electrical components and ARM7 single-chip microcontroller technology, further reduces the size and weight of the equipment, with more stable performance, overcoming the shortcomings of the first generation mechanical booster such as short service life, high failure rate and large size.



II. Features
 

1. Advanced technology adopts digital frequency conversion technology, fully automatic microcomputer control, voltage boost, step-down, measurement, protection, etc.

 

1. Easy wiring, and convenient operation.

 

1. Over-voltage protection and over-current protection. Action time is less than 10ms.

 

1. Closed-loop negative feedback circuit is adopted. No capacity rising during outputting.

 

1. Capacitive touch screen, LCD graphic display, automatic storage, and printing.

 

1. 0.1Hz, 0.05Hz,0.02Hz and 0.01Hz can be chosen, which ensures a wide test range.

III. Technical Specification
 

1. Output voltage: 80kV peak.
2. Output frequency: 0.1Hz, 0.05Hz, 0.02Hz,0.01Hz
3. Load ability: max. 1.1µF at 0.1Hz; 2.2µF at 0.05Hz; 5.5µF at 0.02Hz,11 μF/ 0.01 Hz
4. Measurement accuracy: 3%.
5. Positive and negative peak error of voltage: ≤ 3%
6. Voltage waveform distortion: ≤ 5%
7. Use condition: Indoor or outdoor, temperature -10ºC--40ºC, humidity ≤ 85% RH.
8. Fuse: 10A
9. Power supply: Voltage 220V±5%, 50±5Hz

Remark: If using a portable generator to supply the power, the output voltage and frequency of the generator are required to be stable. It's better to wait for the generator speed to be stabilized, using a multimeter to measure the output voltage. Only after confirming the voltage is stable, that the generator can be used.

Generally, the power is more than 3kW, frequency 50/60Hz, output voltage should be consistent with the supply voltage of equipment.


Select suitable model based on tested object:
When using, the capacitance of test object should not exceed the rated capacitance of VLF equipment. If the capacitance of test object is too small, it will affect waveform output. If the capacitance is less than 0.05µF, the equipment will not output normally. Therefore, the capacitor (capacitance 0.05µF) supplied by HV HIPOT should be connected in parallel.

Refer to Table 2 and Table 3 for the estimation of electric capacity of common electrical equipment.

Table 2 Single-phase ground capacity of different types of generators

	Steam turbine generator			Hydro generator
Generator capacity (MW)	200	300	600	85	125-150	300	400
Single phase to ground capacitance (µF)	0.198	0.18-0.26	0.31-0.34	0.69	1.8-1.9	1.7-2.5	2.0-2.5