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Relay components are important components in intelligent prepaid energy meters, and the service life of relays determines the service life of the meter in a sense. The characteristics of these components are particularly important for the operation of intelligent prepaid energy meters. However, there are many relay manufacturers in China and abroad, with large differences in production scale, technical strength, and technical parameters. Therefore, when selecting relay testing models, energy meter manufacturers must have a sound set of testing equipment to ensure the quality of the electricity meter. At the same time, State Grid has also strengthened the sampling and testing of technical parameters of relays in smart energy meters. The same testing machines and equipment must be used to test the quality of electricity meters produced by different manufacturers. Little did they know that at present, relay detection machines and equipment not only have relatively single detection projects, but also cannot complete the entire detection process with automation technology. The detection data information requires manual operation and analysis, and the detection results have various contingencies and human factors. Moreover, the detection efficiency and safety factor cannot be guaranteed.

In recent years, State Grid Corporation of China has gradually standardized the technical specifications of electric meters, formulated relevant national standards and technical specifications, which has raised some bottleneck issues for the detection of main parameters of relays, such as the load conductivity of relays and the characteristic detection of power switches. Therefore, it is urgent to solve the problem of scientific research on a machine equipment that can comprehensively detect the technical parameters of relays

According to the technical parameter detection regulations of 4078 signal relay, the test report can be divided into two categories: one is the test report without load current, such as attitude value, contact circuit resistance, and mechanical equipment service life; The second is the test report on the load current, such as the operating voltage of the contact touch, the service life of the electricity, and the overload capacity.

The key test report is briefly and specifically introduced as follows:

(1) Attitude value. When the relay operates, the operating voltage value is required.

(2) Contact circuit resistance. The resistance value between the two circuit breakers when the electric shock end is closed.

(3) The service life of mechanical equipment. In the absence of damage to a part of the mechanical equipment, the relay maintains a constant power switch posture frequency.

(4) Contact point touches the operating voltage. When the electric shock end is closed, a relative load current is applied in the electric shock end circuit, and the operating voltage value between the contacts is determined.

(5) Electrical lifespan. When the rated current is applied to both ends of the electromagnetic coil driven by the relay and the rated inductive load is applied in the contact circuit, the reliable attitude frequency of the relay is achieved under the specifications of less than 300 cycles per hour and a PWM duty cycle of 1:4.

(6) Overload capacity. When the relay coil combination pushes the electromagnetic coil with rated current applied to both ends and 1.5 times the rated value applied in the contact circuit, the reliable posture frequency of the relay is under the standard of (10 ± 1) times/minute for posture operation.

Article source: Wholesale and customization of power relays www.sclook.cn