Brief introduction
Dielectric loss test is a basic method in insulation test and effectively detect damp, degradation and partial defect of insulation of electrical equipment. This method is widely used in electric manufacturing, electric equipment installation, connection and preventive test. Measurement on dielectric loss of transformer, mutual inductor, reactor, capacitor, bushing and arrester is the most basic method to test their insulation property. Fully-automatic anti-interference dielectric loss tester breaks through the traditional bridge testing method and adopts variable frequency power technology, single chip and modernized electrical technology to carry out automatic frequency shift, analog-to-digital conversion and data computing. It features strong anti-interference capacity, high test speed, high precision, automatic digitization and easy operation. It adopts high-power switching power supply, which outputs 45Hz and 55Hz pure sine wave and automatically increase the voltage to a maximum value 10 KV. It can filter 50Hz interference automatically, and it is applicable to the site test of substation and other places with large electromagnetic interference. This methods is extensively applied in dielectric loss measurement of transformer, mutual inductor, reactor, bushing, capacitor, arrester and others equipment in power industry.
Products features
1. The instrument adopts complex number current method to measure capacitance, dielectric loss and other parameters. The measured result is highly accurate and it is easy to realize automatic measurement.
2. The instrument adopts variable frequency technology to eliminate 50Hz/60Hz power frequency interference. So a reliable data will be reachable even under the strong electromagnetic interference.
3. The instrument adopts large screen LCD.
4. The instrument is easy to operate and the measuring process is controlled by microprocessor. Once a suitable measuring method is selected, the data measurement will complete automatically under the control of microprocessor.
5. The instrument is designed to be an integrated model with reference capacitor and HV power supply in it, enables site test measurement and reduces site wiring.
6. The instrument is equipped with CVT testing function, which can achieve CVT self-exciting testing without external accessories and measure the capacitance and dielectric loss of C1 and C2 by at a time.
7. GST measurement adopts ivddv technology and avoids unstable data provided by previous GST measurement.
8. The instrument provides low voltage shell function of GST. When the bus of 220kV CVT is grounded, dielectric loss measurement can be conducted for C11 without removing 10 kV GST
9. The instrument has a function of measuring high-voltage dielectric loss. It can carry out dielectric loss test with over 10kV with the help of voltage transformer or series resonance.
10. The instrument has a ground-fault protection function. In case that the instrument is not grounded or grounded incorrectly, the instrument will refuse to enter into normal procedure and output HV. As for the over-current protection function, it will protect the instrument from damage when the tested article is in a short circuit or breakdowns.
11. The instrument has a function of electric shock protection. When the instrument operator suffers an electric shock due to incaution, the instrument will cut off the HV immediately and thus ensure the security of operator.
Product parameters
| Accuracy |
Cx:±(reading×1%+1pF) |
| tgδ: ±(reading×1%+0.00040) |
| Anti-interference: |
Variable frequency anti-interference, the above accuracy can be reached under 200% interference. |
| Capacitance range |
Internal HV: 3pF~60000pF/10kV 60pF~1μF/0.5kV |
| External HV: 3pF~0.5μF/10kV; 60pF~10μF/0.5kV |
| Resolution |
Maximum 0.001pF, 4 valid figures. |
| tgδ range:unlimited, 0.001% resolution, automatic identification for capacitance, inductance and resistance of three tested articles. |
| Test current range |
10μA~1A |
| Internal HV: Set voltage range: 0.5~10kV Voltage resolution : 1V Accuracy: 2% |
| Maximum output current: 200mA |
| Buck-bust method: continuous step-less regulation |
| Test frequency |
45, 50, 55, 60, 65 Hz single frequency |
45/55, 55/65Hz, 47.5/52.5Hz Hz automatic dual
variable frequency |
| Frequency accuracy: ±0.01Hz |
| External HV: In case of UST, maximum test current is 1A, and power frequency or variable frequency is 40-70Hz |
| CVT self-exciting low voltage output: Output voltage 3~50V, output current 3~30A |
| Measuring duration |
About 36s, depending on measuring method |
| Input power supply |
220V AC, 50Hz±1%, supplied by alternating current or generator |
| Computer interface |
Standard RS232 interface |
| Printer |
WH-A7 mini-type thermal printer |
| Environment temperature |
-10ºC~50ºC |
| Relative humidity |
<90% |
| Dimension |
460×360×350mm |
| Weight |
28kg |
Common problem
1. Is your company a sales company or a manufacturer?
Wuhan Huatian Electric Power Automation CO., LTD.is an industrial and trade enterprise, with its own factory, self-produced and self-sold. We were founded in 2004 and have fifteen years of production experience. Our company has reliable production lines, test rooms and R&D centers.
2. Whether the goods are in stock, whether they can be customized, and how long the delivery time is.
After the goods have been ordered, we can be made to order according to the special requirements of customers by using the latest technology. The delivery time is usually within 10 working days if there are no accidents.
3. Is the quality guaranteed?
In order to ensure quality, we use imported components in large quantities. After three times of quality inspection, the goods can be sent out, and the export is uniformly packed in non-fumigation wooden boxes.
4. What are the after-sales terms?
We offer free consulting service, one year warranty, and adopt various methods such as email communication, video calls, technology door-to-door, aiming to solve any after-sales problems in a timely manner.
5. What are the cooperative countries or regions?
Products have been successfully exported to the United States, Brazil, Australia, Russia, the Netherlands, Indonesia, Bangladesh, Iran, India, Saudi Arabia, Mongolia, Japan and other countries and regions. In the United States, India, Vietnam and other regions have cooperative distributors, can provide thoughtful services.
Contact us
Wuhan Huatian Electric Power Automation CO., LTD
Address: T4, No. 1, High-tech 2 Road,East Lake High-tech Development Zone,Wuhan
Zip code: 430074
Tel:(+86)-27-8745 7960 / (+86)027-87993136 / 13808601259
Fax: (+86)-27-8799 3136
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