Conventional preventive tests are generally difficult to find the insulation defects of the end of the cold stator wire in the turbine generator. The DC pressure surface potential test can effectively find out the insulation defects at the end of the stator coil. The inter-phase short circuit fault at the stator end has caused great economic loss. For this reason, the Ministry of Electric Power Industry and the Ministry of Machinery Industry issued document Anshengji (1994) No. 86, which stipulates that the hand bag insulation measurement test at the generator end is one of the important test items for the generator. The generator surface potential tester is a high-tech product that fully meets the spirit of document No. 86. Its use has greatly improved the maintenance efficiency of the generator.

Classification:

Key words:

Generator testing instrument

potential

Hotline:

400-068-3818

Download Product Brochure:

Message

Product Description
Technical parameters
Product selection
Manual Resources
Test wiring
ACCESSORIES LIST

- Commodity name: ZFDW-2 generator surface potential tester
Conventional preventive tests are generally difficult to find the insulation defects of the end of the cold stator wire in the turbine generator. The DC pressure surface potential test can effectively find out the insulation defects at the end of the stator coil. The inter-phase short circuit fault at the stator end has caused great economic loss. For this reason, the Ministry of Electric Power Industry and the Ministry of Machinery Industry issued document Anshengji (1994) No. 86, which stipulates that the hand bag insulation measurement test at the generator end is one of the important test items for the generator. The generator surface potential tester is a high-tech product that fully meets the spirit of document No. 86. Its use has greatly improved the maintenance efficiency of the generator.

1. Overview:

Conventional preventive tests are generally difficult to find the insulation defects of the end of the cold stator wire in the turbine generator. The DC pressure surface potential test can effectively find out the insulation defects at the end of the stator coil. The inter-phase short circuit fault at the stator end has caused great economic loss. For this reason, the Ministry of Electric Power Industry and the Ministry of Machinery Industry issued document Anshengji (1994) No. 86, which stipulates that the hand bag insulation measurement test at the generator end is one of the important test items for the generator. The generator surface potential tester is a high-tech product that fully meets the spirit of document No. 86. Its use has greatly improved the maintenance efficiency of the generator.

Preparation: potentiometer, generator potentiometer, generator surface potential tester, generator potential shift tester, generator stator handbag insulation tester, generator surface potential measuring rod, generator stator coil end surface potential measuring instrument, generator potential shift detector, generator stator coil end surface potential measuring instrument, generator handbag insulation star measuring rod, generator stator coil end surface potential measuring instrument, it is an insulation test method for detecting insulation defects of generator stator bars by surface potential method (and potential shift method). By detecting the compactness and relative insulation strength of the handbag insulation at the end of the stator. It can make up for the lack of end insulation defects that cannot be found in the AC and DC withstand voltage tests of the generator stator windings. It can be found that the insulation of the lead package is poor, the insulation wrapping defect at the nose end of the coil "the insulation box is not fully filled with mud, the binding glass rope is poorly cured, and the penetration caused by the poor welding quality of the stator hollow copper wire at the end joint. Generator surface potential test is a new test project, the end of the coil plays a supervisory role, further improving the reliability of the safe operation of the generator.

Technical parameters:

1. Input resistance 100M

2. Test voltage: DC 0-30KV

3. Voltage accuracy: 1.0%± 1 words

Notes:

1. When the tin foil is wrapped around the end of the package, it must be wrapped tightly, otherwise the foil and the insulating surface will form a capacitor, and there will be a large discharge current when the star measuring rod contacts. Causing misjudgment.

2. When wrapping the end, it is best to divide it into the wire rod side and the water diversion pipe, with an interval of more than 3cm. When the potential is high, it is easy to find out which side is the problem. In fact, the most important point is the root and cone, and the measurement of the middle part is of little significance.

3. The micro-ammeter connected in series with the tester is best to use a digital micro-ammeter to protect the meter even when the reading is too large.

4. Because the end joint is in the lower part of the casing, it is not easy to measure and it is better to lead out with lead wire in advance.

5, the most important thing is to remember the correct abnormal slot number, avoid Zhang Guan Li Dai, remember to remember!

6. When the generator does not pass water, the test shall be carried out, and the stator cooling water shall be completely blown off first.
2.Structure and main technical data：

The tester adopts resistance voltage division type, and its structure is as follows:

Measurement range (DC) Accuracy

0.1~30KV 1.0 level
Attachment Download:ZFDW-2 generator surface potential tester user manual. doc.
Generator Surface Potential Test Procedure

1. The generator stator coil is well insulated to the ground.

2. Short-circuit the three-phase windings end to end.

3. Insulate the lead wire of the generator, the cone of the end water guide pipe, and wrap and plug the insulating water guide box with tin paper. The insulation distance between them is sufficient.

4. Measure with a tester.

5, do high pressure safety measures.
ACCESSORIES LIST

1.1 high voltage output line (to be indicated when ordering, generally not equipped);

2.1 instruction manual;

3. One test report;

4. Product certificate/warranty card 1 copy.

Quality first, service first

Tree industry standards, do a hundred years of enterprises.

Cooperation cases

Wuhan Zhongke Xinyi Electric Power Technology Co., Ltd.

Brand: ZECERS/Zhongke Xinyi

Wuhan Zhongke Xinyi Electric Power Technology Co., Ltd. (brand: ZECERS/Zhongke Xinyi) is a high-tech enterprise focusing on the design, development, manufacturing and technical services of high-voltage test equipment and secondary test equipment for power systems.

The company is located in the Optics Valley New District of the High-tech Development Zone, with 5600 square meters of modern standard production plants and perfect manufacturing, processing and testing equipment. The company has a strong research and development, solid technology, excellent quality team, and Wuhan universities have close ties and technical cooperation, laying a solid foundation for technological innovation. The company has successively obtained ISO9001:2015 international quality management system certification and high-tech enterprise certification. Based on domestic power system testing, the company explores high-tech cutting-edge information technology, and is committed to the research of various new power technologies and the formulation and promotion of relevant standardization.

The company adheres to the business philosophy of "quality-oriented, pioneering and innovative, honest and pragmatic, and win-win cooperation", regards product quality and independent innovation as the core competitiveness of the enterprise, and continuously strives for the standardization, humanization, intelligence, refinement and diversification of products. The products cover all aspects of power testing, and widely serve the State Grid, South Grid, Inner Mongolia Power Grid and other power systems, major power generation groups, photovoltaic wind power new energy enterprises, railway petrochemical enterprises, metallurgical industrial and mining enterprises, electrical complete sets of enterprises, transmission, transformation and distribution engineering construction units, scientific research institutions, third-party testing institutions and other enterprises and institutions. The power testing equipment produced by the company provides a reliable data basis for the safe operation of the power system. The company's products have covered all provinces and cities in the country, and have been exported to Laos, Myanmar, Cambodia, Vietnam, Pakistan, East Africa, Russia, Malaysia, Brazil, Europe and other countries, and have been widely recognized.

"Technology to create the future, innovation to change the present", would like our professional to provide you with satisfactory products and services and create more value.

2014 Year

Company establishment

3060 Wan yuan

Registered capital

5600 ㎡

Production plant

8372 +

Customer Service