VLF High Voltage Testing Machine，AC Hipot Tester For Large Capacitance Object

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WUHAN FANKE HAIWO HIGH VOLTAGE TECHNOLOGY CO.,LTD.

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VLF High Voltage Testing Machine，AC Hipot Tester For Large Capacitance Object

Name: VLF High Voltage Testing MachineAC Hipot Tester For Large Capacitance Object
Brand: Fanke High-voltage
Price: 1 USD

Buy cheap VLF High Voltage Testing Machine，AC Hipot Tester For Large Capacitance Object product

Brand Name : Fanke High-voltage

Model Number : VLF series

Certification : ISO9001

Place of Origin : China

MOQ : One Set

Price : Negotiable

Payment Terms : T/T

Supply Ability : 20 sets / month

Delivery Time : 20~30 working days

Packaging Details : Export standard wooden case with fumigation free

Principle : Very-low frequency technology principle

Usage : Hipot test for 35KV and below MV power cable and generator

Component : Controller，HV booster，Compensation capacitor Load

Test Frequency : 0.1Hz, 0.05Hz, 0.02Hz

Max.Test Voltage : 30KV, 50KV, 90KV can be ordered

Load Range : 0.1Hz, ≤0.5μF ; 0.05HZ,≤0.1μF ;0.02HZ ≤2.5μF

Test Accuracy : No Less Than 3%

Output Waveform : Good Sine Wave,Voltage, Waveform distortion ≤ 5%

HV Booster Using Way : Single or In Series Connection

Duty Cycle : 60mints

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VLF High Voltage Testing Machine , VLF AC Hipot Tester , Testing Large Capacitance object

I. Product Description Of VLF Test Technology :

Ultra low frequency insulation withstand voltage test is an alternative method for power frequency withstand voltage test.
Using 0.1Hz ultra low frequency withstand voltage test replace power-frequency withstand voltage test, not only is equivalent to the same equipment, and greatly reduces the volume and the weight, so the ultra-low frequency withstand voltage device is widely used in large generators, cables, power capacitor test AC voltage withstand test products.

II. Technogy feature advantage at DC test /power frequency test/VF test/ VLF test

Aspects	DC	Power Frequency	Variable Frequency	0.1Hz VLF
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

See from the above table , VLF test is the substitute for power frequency test. It is suitable for testing electrical equipment with large capacitance.

III. Product advantage and Feaure

Data of current and voltage are obtained directly through the sampling of high-pressure side and it is true and accurate.
Over-voltage protection: the instrument will shut down to protection within 20 ms when the output voltage is exceeding limiting values of setting.
Over-current protection: design for dual protection of high and low voltage, downtime protection can be accurately set in high-pressure side. Shut down to protection times is within 20 ms when the current of low-voltage sides exceeds reacted current.
High-voltage output protection resistor design in the body boost and it is no need to additional outside resistor.
Closed-loop negative feedback control circuit of high and low voltage.

IV. General Technical data:

Peak voltage: 30kV,50KV, 90KV can be ordered
Test frequency: 0.1Hz, 0.05Hz and 0.02 Hz (selectable)
Fuse: 10A
Maximum load capacity: 0.5μF at 0.1Hz; 1μF at 0.05Hz; 2.5μF at 0.02Hz
Power supply: 220V ±10%, 50Hz ±5% (If using a portable generator, make sure the output voltage and frequency are stable. Power >3kW.)
Output voltage accuracy: peak voltage instability ≤1%; frequency instability ≤3%; waveform distortion: <5%.
Working environment: indoor or outdoor; -10℃-+40℃; 85%RH
Weight: Control unit - 5kg; HV unit: 48kg

Remarks: Capacitance of test object can not be larger than the maximum value of the test instrument. If capacitance of test object is smaller than 0.05μF, the hipot should be equipped with an auxiliary device (supplied by HV HIPOT at your option).

V. Other typical model

Model no	Rated Voltage/current	Load Carrying Capacity	Power FuseTube	Product Structure and Weight
VLF-30	30kV/20mA (Peak)	0.1Hz,≤1.1µF	5A	Controller:4KG Booster: 25KG
		0.05Hz,≤2.2µF
		0.02Hz,≤5.5µF
VLF-50	50kV/30mA (Peak)	0.1Hz,≤1.1µF	15A	Controller:4KG Booster: 50KG
		0.05Hz,≤2.2µF
		0.02Hz,≤5.5µF
VLF-90	90kV/30mA (Peak)	0.1Hz,≤0.5µF	20A	Controller:4KG Booster Grade 1(40kV):25KG Booster Grade 2(50kV):50KG
		0.05Hz,≤1µF
		0.02Hz,≤2.5µF

VI.Test Voltage standard by this test set

1 For MV and below class XLPE cable:

Test peak voltage formula: Ｕmax＝3Ｕ₀,

Ｕ₀＝Single-phase rated voltage of cable

Test time :60mints

2 For generator stator

Ｕ_test＝1.414*βKＵ₀,

U_test---- 0.1Hz peak test voltage (kV);

β-------0.1Hz and 50Hz voltage equivalent factor, usually taking 1.2;

K------ Usually take 1.3 to 1.5, generally take 1.5;

Uo----- Generator stator windings rated voltage (kV);:

Product Tags:

high voltage vlf hipot instruments

vlf cable testing equipment

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