Basic Info.
Certification
ISO9001, CCC
Protection
Shock Resistance
After-Sales Service
Technical Support
Display
7-Inch Touch Screen
Large Test Range
0.1Hz, 0.05Hz and 0.02Hz
Transport Package
Wooden Case
Product Description
Microcomputer control High voltage withstand tester Touch Screen VLF AC Hipot Test Set Introduction:High voltage withstand test of electrical equipment is one of the most important items specified in insulation preventive test.
The withstand voltage test can be divided into ac withstand voltage test and dc withstand voltage test. The ac withstand voltage test can be divided into power frequency, frequency conversion and 0.1hz ultra-low frequency test technology, of which 0.1hz ultra-low frequency technology is the latest technology recommended by the current international electrotechnical commission.
Our company's new generation of VLF Test Equipment equipment is the core product independently developed with the latest American technology. VLF Test Equipment adopts 7-inch touch screen, the latest arm7 single chip microcomputer, high-speed ad acquisition circuit, and is equipped with background management software. VLF Test Equipment overcomes many shortcomings of domestic similar products.Meanwhile, its cost performance is much higher than that of similar imported products. VLF Test Equipment is especially suitable for withstand voltage test of electrical equipment with large insulation equivalent capacitance (such as power cable, power capacitor, large and medium-sized generator and motor, etc.)
Features:
1. Advanced technology: digital frequency conversion technology, microcomputer control, pressure rise, pressure reduction, measurement, protection, etc
2. The test process is fully automated.
3. Easy to operate: simple wiring, fool operation.
4. Comprehensive protection: multiple protection (over-voltage protection, over- current protection at high and low voltage sides), rapid action (when acting)
5. Room ≤ 10ms), the instrument is safe and reliable.
6. Safety and reliability: the controller is connected with the low voltage of the high voltage generator, with photoelectric control, safe and reliable use.
7. The high and low voltage closed-loop negative feedback control circuit is adopted, and the output has no capacity rise effect.
8. Complete configuration: capacitive touch screen, LCD Chinese character display, automatic storage, automatic printing.
9. Large test range: 0.1Hz, 0.05Hz and 0.02hz multi frequency selection, large test range.
10.Small volume and light weight: it is very convenient for outdoor operation.
Parameters:
VLF Test Equipment output wiring method
Wiring instructions: connect the control output special line, high voltage output special line and grounding wire equipped with the product according to the method shown in Figure 3. The power cord of the power socket is connected to the AC of 220V / 50Hz/60HZ. (Input voltage can be customized)
1. Some setting and boosting interface of the vlf tester
Below controller interface indicates that the voltage is boosting
Below controller interface prompts to stop the test
Below is the over current protection prompted by controller
Power Cable Withstand Voltage Test Method
1. Disconnect all electrical equipment connected to the tested cable.
2. Use a megger to test the insulation parameters of each phase of the cable, and carry out the ultra-low frequency withstand voltage test only after the test is qualified.
3. Set the test voltage value: Umax = 3uo, where uo is the rated phase voltage of the cable.
Example 1: cable parameter: the rated line voltage is 10kV, and the rated phase voltage uo = 6kV, so the test voltage setting value is:
Umax = 3uo = 18kV
See Picture 1 for the setting value of 0.1Hz ultra-low frequency test voltage of various rubber and plastic insulated power cables.
Picture 1 0.1Hz ultra-low frequency test voltage and time of various rubber plastic insulated power cables.
Rated Voltage U0/USD(KV) | Handover test | Preventive experiment | | | | |
multiple | test voltage(kv) | test time(mins) | multiple | test voltage(kv) | test time(mins) | |
1.8/3 | 3U0 | 5 | 60 | 3U0 | 5 | 15 |
3.6/6 | 3U0 | 11 | 60 | 3U0 | 11 | 15 |
6/6 | 3U0 | 18 | 60 | 3U0 | 18 | 15 |
6/10 | 3U0 | 18 | 60 | 3U0 | 18 | 15 |
8.7/10 | 3U0 | 26 | 60 | 3U0 | 26 | 15 |
12/20 | 3U0 | 36 | 60 | 3U0 | 36 | 15 |
21/35 | 3U0 | 63 | 60 | 3U0 | 63 | 15 |
26/35 | 3U0 | 78 | 60 | 3U0 | 78 | 15 |
Note: UN is the rated voltage of the cable, and uo is the phase voltage of the cable.
1. Test time: 60 minutes for handover test and 15 minutes for preventive test.
2. Setting current value of overcurrent protection:
Estimation method of capacitive current (or leakage current) of ultra-low frequency withstand voltage test article:
Io=2πfCU=2×3.14×0.1CU(mA)… (formula 1)
C is the electric capacity of the cable to the ground, unit: UF; u is the effective value of the test voltage, unit: kV.
Example 2: a 10KV (UN = 10kV, uo = 8.7kv) cable is 4km long, with a single phase to ground capacitance of 0.21uf/km and 0.1Hz super
If the low frequency test voltage is 26kv (peak value), the leakage current is approximately:
Io=2πfCU=2×3.14×0.1CU=0.628×0.21×4×26/ 2 =9.69(mA)
Setting current value of overcurrent protection: I=kIo…(formula 2)
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Product application:Package and delivery:Company profile:Wuhan WG Hipot Electric Tester Co.,Ltd. is the professional factory of high voltage testing equipment with over 15 years industry experience.
ISO Certified factory, qualified R&D and after-sales Engineer team, 3000 square meters workshop, our high voltage testers cover full range: High voltage hipot tester, Circuit breaker Switchgear Tester, Transformer tester, Relay Protection Tester, CT/PT Tester, MOA/Insulator Tester, SF6/Insulation Oil Test Equipment, Resistance Tester, etc.
Since 2003, with the support from our investors Wuhan High Voltage Institution and Xi'an High Voltage Institution, WG Hipot established and pioneered in high voltage testing field in domestic market as the designated supplier for State Grid and mainstream power companies.Meantime, WG Hipot has developed overseas markets across 5 continents worldwide. We gained good feedback from our customers with our high performance, good quality,
customized specification and easy-to-operate high voltage testers, which can be widely used in railway, oil and chemical industry, electricity grid, university, big factory etc.
Certificate:ON-SITE TEST:After-sales service:1, Technical datas and operation manual sent for evaluation.
2, Tranining how to install and use the machine.
3, Engineers available to service machinery on site.
CUSTOMER VISIT:FAQ:1.What's the warranty period?Warranty period is 1 year.2. What about the leading time for production?Honestly, it depends on the order quantity and the product. Usually our leading time is within 7 working days after order confirmed.3. What is your terms of delivery?EXW, FOB, CFR, CIF all acceptable. You can choose the one which is the most convenient and cost effective for you.4. How much will be the Shipping cost and time?This will depend on the size of your goods and the method of shipping (by sea/ by air/by Express) and your designated port or airport. We will be grateful if you can spare us some minutes to evaluate the cost based on the information provided.5. Could you please tell me the Warranty Period of your product?Our warranty period is one year free and lifelong maintenance. If the product is damaged (if not man-made damage), in the first year,we will send free parts for replacement. Over warranty, maintenance is paid service.6. What kind of Certificate can you provide?We can provide the CE mark, ISO 9001 quality certificate, third party calibration certificate(CNAS) and factory test report.7. Do you have Technical Backup to all customers from different countries?To be sure,our technical support is always available and quick response.
We are manufacturer with much on-site testing experience, thus we know how to deal with your problems. Moreover, our engineers can go to your country to support if need.
Address:
No. 40-2, Shang-Controlled Huading Industrial Park, Gedian Economic Development Zone, Ezhou, Hubei, China
Business Type:
Manufacturer/Factory, Trading Company, Group Corporation
Business Range:
Electrical & Electronics, Manufacturing & Processing Machinery
Management System Certification:
ISO 9001
Company Introduction:
Wuhan WG Hipot Electric Tester Co., Ltd. Is a high-tech enterprise professionally engaged in R & D, manufacturer and marketing of power testing products, instruments, power industry automation systems, which are supplied for railway, oil and chemical industry, electricity grid, university, national power companies, metallurgy petrochemical corporations, factories and public institution etc.
Established in 2012, located in Wuhan City, Hubei Province, China. Owns 3000 square meters factory area. We have developed total more than 160 kinds of electrical test products cover full range: High voltage hipot tester, Circuit breaker Switchgear Tester, Transformer tester, Relay Protection Tester, CT/PT Tester, MOA/Insulator Tester, SF6/Insulation Oil Test Equipment, Resistance Tester, etc. We realize modern management and automation, the modern enterprise management system is introduced in an all-round way, and a set of perfect quality and quality guarantee system have been set up in accordance with ISO9001-2008 standards within the scope of the whole company, A special quality management department is responsible for controlling the whole process of product formation. And according to the requirements of ISO9001, we have set up a complete set of control procedures from various aspects such as product design and development, component procurement, production process control, inspection and service, ensuring that we provide users with quality products and services.
15 years of experience and strong R&D support made us become a leader in the field of power on-site testing. The domestic market have been expanded to many provinces and cities nationwide, and our products have been recognized by diverse range of industrial sectors. The business is increasing every year.
Meanwhile, we have also been actively marketing in oversea market. The reliable performance and competitive price of our products have obtained us high praise from our overseas customers.
Our factory has always put quality as the lifeline, product quality, working quality and service quality are in strict accordance with the ISO9001: 2008 management system.
Our factory will as always adhere to Truth-seeking, Truth-seeking, Refinement, Innovation, adhere to technology as an advantage, quality assurance, integrity to win market, innovation and development. Dedicated to power sector, large factories and mines, electrical testing workers to provide first-class products, first-class service.
Our factory aim: Leading Technology, Quality First, honesty, win-win cooperation!