Method for automatically testing and recording rated value of SF6 gas density relay

Abstract

The invention relates to a method for automatically testing and recording a rated value for an SF6 gas density relay and includes a checking apparatus. The checking apparatus includes a gas source supplying mechanism with adjustable pressure, at least one pressure sensor, a temperature sensor, a computer data processing system and a display screen. The computer data processing system is provided with a relay action signal input port. The method includes the following steps: step 1, the indicating value of a test product is observed according to a pointer of the test product and the pressure is regulated just to a rated value of the test product, namely the pointer of the test product just points at the rated value Pe; step 2, a command key is tested according to the rated value; the checking apparatus automatically records a pressure value P and a temperature value T of the current pressure sensor and the temperature sensor; step 3, corresponding pressure value Pe test is converted automatically at 20 DEG C according to the pressure-temperature characteristic relation of the SF6 gas; step 4, the checking apparatus automatically carries out correcting on the tested Pe test according to the linear relation of the pressure sensor and the temperature sensor and stores the test result.

Description

technical field [0001] The present invention relates to SF 6 The invention relates to a test method for a gas density relay, in particular to a method capable of automatically testing and recording the rated value of a density relay. Background technique [0002] SF 6 Electrical products have been widely used in the power sector, industrial and mining enterprises, and promoted the rapid development of the power industry. How to secure SF 6 The reliable and safe operation of electrical products has become one of the important tasks of the power sector. SF 6 Gas density relay is SF 6 One of the key components of electrical switches, it is used to detect SF 6 SF in the electrical equipment body 6 The change of gas density, its performance directly affects the SF 6 Reliable and safe operation of electrical equipment. SF installed on site 6 Due to the infrequent action of the gas density relay, after a period of time, the phenomenon of inflexible action or poor contact ...

AI Technical Summary

Problems solved by technology

From the above, it can be seen that the calibration of these instruments can only be calibrated by traditional methods, and it is difficult to test accurately, because the reading judgment is due to human factors, and it often happens that the pointer is on the non-scale line, which depends entirely on human estimation. People often have different results; at present, there are some test instruments that can read on the market, which eliminates the above errors. However, if these instruments want to process data, they must record the data with a pen, and it can be done manually or by re-entering the computer. processing, which is very cumbersome and inconvenient

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