Automatic density relay verification system

Abstract

The invention discloses an automatic density relay calibration system which is convenient to carry and move integrally and more convenient to calibrate on site, and an indication value of a sulfur hexafluoride density relay is acquired through a camera assembly in the field calibration process. The system comprises a box body assembly, wherein the box body assembly comprises a lower box body and an upper cover for closing and opening the lower box body. The lower box body is internally provided with a calibration host positioning groove, an accessory positioning groove and a camera assembly positioning groove. Groove body buffer cotton is filled in the groove walls of the calibration host positioning groove and the camera assembly positioning groove. L-shaped anti-collision pads are arranged at the four corners of the accessory positioning groove. Two supporting legs are arranged at the position, close to the upper cover, of the bottom of the lower box body, and two walking wheels arearranged at the position, away from the upper cover, of the bottom of the lower box body. A calibration host assembly of a box-type structure is placed in the calibration host positioning groove. Thecamera assembly is electrically connected with the calibration host assembly through a power line, and the camera assembly is in communication connection with the calibration host through a network cable.

Description

technical field [0001] The invention relates to a verification device for a sulfur hexafluoride density relay, which is specifically used for verification of a sulfur hexafluoride density relay at a substation site. Background technique [0002] SF 6 Circuit breakers are high-voltage electrical appliances widely used in power systems. SF 6 The reliable operation of circuit breakers has become one of the most concerned issues of power supply and utilization departments. SF 6 The insulation and arc extinguishing performance of a circuit breaker largely depends on the SF 6 The density of the gas, so, for SF 6 The monitoring of gas density is particularly important. [0003] SF 6 Circuit breaker monitoring is through the SF 6 Density relays are implemented, but SF 6 Density relays require periodic calibration; commercially available (prior art) SF 6 Density relay calibration equipment for SF 6 Density relays are regularly calibrated. The specific calibration principle...

AI Technical Summary

Problems solved by technology

[0003]SF6 circuit breakers are monitored by SF6 density relays, but SF6 The density relay needs to be calibrated regularly; the SF6 density relay calibration equipment on the market (existing technology) is used for regular calibration of the SF6 density relay, The specific calibration principle is to simulate the gas pressure in the working environment of the sulfur hexafluoride density relay, and use the standard pressure sensor to check whether the indication value of the sulfur hexafluoride density meter is accurate. The current calibration process can be completed automatically , only need to manually check the value, this calibration process and calibration principle can refer to the SF6 density relay calibrator disclosed in the Chinese patent (patent number 2015207845761, patent announcement date is January 13, 2016, patent announcement number is CN204964739U) Calibration device, the applicant unit of this patent is also the manufacturer of the existing sulfur hexafluoride density relay calibrator used by our company. There is no problem in China, but according to actual operation and maintenance needs, at present, we are more likely to perform on-site verification of sulfur hexafluoride density relays during power outage intervals;

[0004] The on-site calibration and laboratory calibration of the sulfur hexafluoride density relay calibrator use the same calibrator, the only difference is that the on-site calibration Calibration personnel are required to continuously check the indication value of the sulfur hexafluoride density relay installed on the spot at a high place. The workload of this process is heavy, resulting in low efficiency of single-person calibration, which greatly affects the automatic design effect of the instrument itself. Experience; therefore, we try to make improvements, avoid repeatedly checking the indication value of high-level relays during the calibration process, and design a complete calibration system for sulfur hexafluoride density relays that is convenient for on-site testing

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