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Contact person: Elva Zhuang&Sunny Ni
Tel:+86-573-84775555
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Relay Test
Aug 22, 2018

Relay is the key component of intelligent prepaid watt-hour meter. The life of relay determines the life of the meter to a certain extent. The performance of the device is very important to the operation of intelligent prepaid watt-hour meter. There are many domestic and foreign relay manufacturers, the production scale is quite different, the technical level is very different, and the performance parameters are very different. Therefore, the watt-hour meter manufacturers must have a set of perfect detection device to ensure the quality of the watt-hour meter. At the same time, the State Grid has also strengthened the sampling test of relay performance parameters in smart watt-hour meters, which also needs corresponding testing equipment to test the quality of watt-hour meters produced by different manufacturers. However, at present, the relay detection equipment is not only a single test item, the test process can not be automated, the test data need to be processed and analyzed manually, the test results have a variety of randomness, artificial, and low detection efficiency, security can not be guaranteed [1].

In the past two years, the State Grid has gradually standardized the technical requirements of ammeters, formulated relevant industry standards and technical specifications, which put forward some technical problems for relay parameter detection, such as relay load on-off capacity, switching characteristics test and so on. Therefore, it is urgent to study a device to realize the comprehensive detection of relay performance parameters [1].

According to the test requirements of relay performance parameters, test items can be divided into two categories: one is the test items without load current, such as action value, contact resistance, mechanical life; the other is the test items with load current, such as contact voltage, electrical life, overload capacity.

The main test items are as follows: (1) action values. Voltage required for relay operation. (2) contact resistance. The resistance between two contacts when the electric shock is closed. (3) mechanical life. When the mechanical part is not damaged, the number of relay switches is repeated. (4) contact voltage. When the electric shock is closed, a certain load current is applied in the electric shock circuit, and the voltage between the contacts is value. (5) electrical life. When the rated voltage is applied to both ends of the driving coil of the relay and the rated resistance load is applied to the contact circuit, the reliable operation times of the relay are less than 300 cycles per hour and the duty cycle is 1:4. (6) overload capacity. When the rated voltage is applied at both ends of the driving coil of the relay and the rated load is applied at 1.5 times in the contact circuit, the reliable operation times of the relay under the operating frequency of (10 + 1) times/minute are obtained.

Add: No.38 South Taoyuan Road, Yaozhuang Town,Jiashan County, Jiaxing City, Zhejiang Province, China
Contact person: Elva Zhuang&Sunny Ni
Tel:+86-573-84775555
Fax:+86-573-84776699
Phone:+86-13732570066
E-mail:
sales@great-relay.com
       

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