SF6 density relay with adjustable pressure set value and multipurpose pressure interface

Abstract

The invention discloses an SF6 density relay with an adjustable pressure set value and a multi-purpose pressure interface, which relates to a gas density relay and comprises a shell connected with a quick-assembly multi-purpose pressure interface. A pressure sensor, a temperature sensor, a single-chip microcomputer used for processing electric signals transmitted by the pressure sensor and the temperature sensor, a digital display and a communication interface are arranged in the shell, and the digital display and the communication interface can be embedded in the shell in an external interaction mode; the pressure sensor and the temperature sensor are electrically connected with the single chip microcomputer; the single chip microcomputer is electrically connected with the digital display; the single-chip microcomputer is electrically connected with the communication interface. The pressure valve can be connected with pressure connectors of different specifications, and the pressure value can be set according to needs.

Description

technical field [0001] The invention relates to a gas density relay, in particular to an SF6 density relay with adjustable pressure setting value and multi-purpose pressure interface. Background technique [0002] SF6 is a colorless, odorless, non-toxic, non-flammable stable gas with a molecular weight of 146.06 and a density of 6.1kg / m3 at 20°C and 0.1MPa, which is about 5 times the density of air. It is gaseous under normal pressure; the molecular structure of sulfur hexafluoride is arranged in octahedron, the bonding distance is small, and the bonding energy is high, so its stability is very high. Capacitance is similar to nitrogen; it is widely used in gas insulation of electronic and electrical equipment. [0003] SF6 density relay is an essential instrument for monitoring and protecting SF6 gas-insulated equipment, and it has the function of monitoring the SF6 gas pressure value of SF6 equipment. At this stage, there are many manufacturers of SF6 density relays used ...

AI Technical Summary

Problems solved by technology

At this stage, there are many manufacturers of SF6 density relays used in substations, with various types and models, and the rated, alarm, and blocking pressure values ​​are different, which has caused a lot of inconvenience to maintenance personnel for maintenance and replacement, instrument calibration, and spare parts procurement.

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