Product Categories

Wuhan Ultra High Voltage Power Technology Co., Ltd

E-mail
Phone
Address
Building 6, Optics Valley Electromechanical Industrial Park, No. 84 Gaoxin 5th Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province

Ultra-low frequency high voltage generator

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The ultra-low frequency high voltage generator mainly outputs sine wave or cosine square wave high voltage, which is used to simulate the stress effect of power frequency high voltage on insulation, and to detect insulation defects in equipment such as cables and generators. Due to its small size and easy operation, it is particularly suitable for on-site operations and is the mainstream tool for preventive testing of distribution network cables.

Product Details

Ultra low frequency high voltage generator is a specialized power supply device used for insulation testing of high voltage power equipment, especially medium and low voltage cables. It outputs high voltage sine or cosine square waves with extremely low frequency, specifically used to replace AC withstand voltage tests at power frequency (50/60Hz) to solve the problem of excessive test current for large capacitive loads at power frequency.

Our company's new generation series of ultra-low frequency high-voltage generators adopts independently developed core products, including a 7-inch touch screen, imported high-speed AD acquisition circuit, and production technology. Improved the stability of instrument quality, reduced the volume and weight of equipment, simple operation, overcome many shortcomings of similar domestic products, and have a much higher cost-effectiveness than mechanical boosters of similar imported products with short service life, high failure rate, and large volume. Compared to other types of voltage withstand testing equipment, 0.1Hz ultra-low frequency has many advantages.

Main application scenarios:

The ultra-low frequency high voltage generator is mainly used for preventive testing and handover testing of medium and low voltage distribution network cables (10kV, 35kV), as well as for testing small capacitance equipment such as motors and insulators.

Cross linked polyethylene cables: especially acceptance tests for old cables or newly installed joints.

Wind power generation: used to test the insulation of the stator winding of wind turbines.

Mining cables: Due to limited underground space, the portability advantage of VLF equipment is obvious.

VLF series ultra-low frequency high voltage generator parameters:

output frequency	0.1Hz、0.05Hz、0.02Hz
load-carrying capacity	0.1Hz 1.1µF
	0.05Hz 2.2µF
	0.02Hz 5.5µF
measurement accuracy	3%
Voltage positive and negative peak error	≤3％
Voltage waveform distortion	≤5％
Terms of Use	Temperature: -10 ℃ to+40 ℃
Terms of Use	Humidity: ≤ 85% RH
working power supply	Frequency 50Hz, voltage 220V ± 5%. If a portable generator is used for power supply, the generator requirements are: frequency 50Hz, voltage 220V ± 5%, and the generator power should refer to the following table, And parallel a resistive load (such as an electric furnace) with a power of not less than 800W at the output end of the generator to stabilize the operating speed of the generator. Otherwise, the instrument will not function properly.

Performance comparison between mechanical and electronic 0.1Hz withstand voltage testing equipment

0.1Hz voltage resistant equipment type	High voltage control mode	High voltage waveform	energy saving	noise	mechanical life	electrical life
mechanical	High voltage mechanical switch polarity switching	square wave	Not energy-saving: consuming excess energy with high-power resistors	high	short	short
electronic type	High voltage electronic switch polarity switching	sine wave	Energy saving: Feed excess electricity back to the grid	slight	Nothing	long

Performance comparison of various pressure test equipment

comparative content	power frequency withstand voltage	Variable frequency withstand voltage	0.1Hz withstand voltage	DC withstand voltage
equivalence	good	good	good	general
Insulation destructive	small	small	small	larger
Operational safety	lower	lower	high	lower
Test wiring	complex	complex	simple	simple
Equipment volume		larger	small	small

Ultra low frequency series products

model	rated voltage	load-carrying capacity	Power fuse tube	Generator power	Product structure and weight
30/1.1	30kV (peak)	0.1Hz，≤1.1µF	10A	＞3kW	Controller: 4kg, booster: 25kg
		0.05Hz，≤2.2µF
		0.02Hz，≤5.5µF
40/0.8	40kV (peak)	0.1Hz，≤0.8µF	15A	＞4kW	Controller: 4kg, booster: 25kg
		0.05Hz，≤1.6µF
		0.02Hz，≤4µF
50/0.7	50kV (peak)	0.1Hz，≤0.7µF	20A	＞5kW	Controller: 4kg, booster: 35kg
		0.05Hz，≤1.4µF
		0.02Hz，≤3.5µF
60/0.6	60kV (peak)	0.1Hz，≤0.6µF	25A	＞6kW	Controller: 4kg, booster: 45kg
		0.05Hz，≤1.2µF
		0.02Hz，≤3µF
80/0.5	80kV (peak)	0.1Hz，≤0.5µF	30A	＞8kW	Controller: 4kg, booster: 50kg
		0.05Hz，≤1.0µF
		0.02Hz，≤2.5µF
90/0.4	90kV (peak)	0.1Hz，≤0.4µF	30A	＞9kW	Controller: 4kg, booster: 55kg
		0.05Hz，≤.0.8µF
		0.02Hz，≤2.0µF

Note: The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice. If there is any act of theft or copying, legal responsibility will be pursued.

VLF系列超低频高压发生器

Product Video Product Atlas

Product Attachment Diagram

VLF系列超低频高压发生器 Control boxBoosterSelf checking capacitorsDischarge rodConnecting cablesConnecting cablesConnecting cables1/3 grounding wirePower cordInsurance managementPrinting paper

Product detail images

VLF系列超低频高压发生器 The whole setControl boxControl boxControl box panelSignal outputGrounding postPrinterPower interfaceEmergency stopOperation prompt diagramBoosterBoosterBoosterInputGroundingAppearance of control box