CN2650118Y

CN2650118Y - Pointer-type SF6 gas density relay

Info

Publication number: CN2650118Y
Application number: CN 03255445
Authority: CN
Inventors: 金海勇
Original assignee: Keli Electric Co ltd Shanghai
Current assignee: Keli Electric Co ltd Shanghai
Priority date: 2003-07-09
Filing date: 2003-07-09
Publication date: 2004-10-20
Anticipated expiration: 2013-07-09

Abstract

A pointer SF6 gas density relay is provided, which comprises a pointer density relay main body, and is characterized in that: the relay also comprises a circuit board, which consists of a power supply, a pressure and temperature signal sampling input unit, an amplifying and processing unit, and a SCM; the SCM can realize the remote transmission through a communication interface, wherein, the SCM is connected with the amplifying and processing unit, which is connected with the pressure and temperature signal sampling input unit, the power supply supplies power for the SCM. By adopting the technical scheme, the utility model can not only directly and reliably participate in the control loop of the electrical equipment, but also have the remote communication function, the remote measurement and remote control functions of substation to SF6 gas density relay and the on-line monitoring of SF6 density value are realized to ensure the electric safety.

Description

A kind of pointer SF 6Gas density relay

(1) technical field

The utility model relates to a kind of SF ₆Gas density relay relates in particular to a kind of pointer SF with distant communication function ₆Gas density relay.

(2) background technology

SF ₆Electric switch has been widely used in power department, and industrial and mining enterprises have promoted the fast development of power industry.How to guarantee SF ₆The reliable and secure operation of electric switch has become one of vital task of power department.SF ₆The arc-extinguishing medium of electric switch and insulating medium are SF ₆Gas can not leak gas, if leak gas, just can not guarantee SF ₆The reliable and secure operation of electric switch.So on-line monitoring SF ₆The SF of electric switch ₆Density value is very necessary.

Be used for monitoring SF now ₆Density be a kind of pointer density monitor of machinery, it has the SF of working as ₆Can report to the police and blocking function when gas leakage takes place electric switch, and the performance of on-the-spot display density value.Because it does not have the distant communication function, in the pulpit or the control room can not see operating SF ₆The gas density value of electric switch is difficult to satisfy the requirement of people to the teletransmission on-line monitoring.

In order to satisfy the requirement of people to the teletransmission on-line monitoring, a kind of digital SF has appearred on the market ₆Gas density relay, it has the RS485 communication interface, can solve SF ₆The remote measurement of gas density, distant control function.But because this digital SF ₆Gas density relay is participated in control loop directly in the electromagnetic field environment of transformer station, because the interference of electromagnetic field is difficult to accomplish reliability service.

In addition, this several years unattended operation transformer stations have had very big development, and for unattended operation transformer station, periodic monitoring density value (sending someone to check meter) just seems pretty troublesome, and is very uneconomical.Simultaneously, along with the continuous development of unattended operation transformer station technological transformation, the Automation of Electric Systems degree has had very big raising.Unattended operation transformer station has been realized the platform of remote measurement, distant control function.Therefore, for SF ₆Gas density relay, requiring it can either be fit to the scene has the occasion of the interference of electromagnetic field to use, and has communication function again, thereby satisfies unattended operation transformer station to SF ₆The density value remote measurement realizes on-line monitoring.

(3) utility model content

The purpose of this utility model is to provide a kind of pointer SF ₆Gas density relay, it can either be fit to the scene has the occasion of the interference of electromagnetic field to use, and has communication function again, thereby satisfies unattended operation transformer station to SF ₆The density value remote measurement realizes on-line monitoring.

A kind of pointer SF provided by the utility model ₆Gas density relay, comprise pointer density monitor body, it is characterized in that, it also comprises circuit board, this circuit board is made up of power supply, pressure and temperature signal sampling input block, magnification processing, single-chip microcomputer, and single-chip microcomputer is finished teletransmission by its communication interface, and wherein: single-chip microcomputer links to each other with magnification processing, magnification processing links to each other with pressure and temperature signal sampling input block, and power supply is powered to single-chip microcomputer.

Adopted above-mentioned technical solution, can either directly participate in the control loop of its electrical equipment reliably, had the distant communication function again, realized that transformer station is to SF ₆The remote measurement of gas density relay, distant control function, and realize SF ₆The on-line monitoring of density value is for ensureing that electric power safety plays effect.

(4) description of drawings

Fig. 1 is a structural representation of the present utility model.

(5) embodiment

As shown in Figure 1, the utility model, promptly a kind of pointer SF ₆Gas density relay is made up of pointer density monitor body and circuit board two parts.

Pointer-type density monitor body mainly helps formula contact 2, second O-ring seal 3, movement 4 by joint 1, magnetic, watchcase, aluminium cover 5, circuit board 6, compositions such as index dial 7, pointer 8, pressure transducer 9, C shape pipe 10, temperature compensation sheet 11, socket 12, temperature sensor 13, first O-ring seal 14.The function of this gas density relay is all realized by mechanical part.Kept existing ZMJ-3 type pointer-type density monitor parts fully, utilized temperature compensation sheet 11, the pressure and temperature that changes has been revised reaction SF ₆The variable density of gas.

Circuit board 6 main common power supply, pressure and temperature signal sampling input block (model that can adopt Dezhou company to produce is the product of AD694), magnification processing (model that can adopt TAIHE company to produce is the product of CYD-1), the single-chip microcomputers (model that can adopt PHILIPS company to produce is the product of P87LPC767BN) of adopting are formed.Common connected mode is: single-chip microcomputer links to each other with magnification processing, and magnification processing links to each other with pressure and temperature signal sampling input block, and power supply is powered to single-chip microcomputer.Single-chip microcomputer is finished teletransmission by its communication interface.

The utility model is by the pressure and temperature sensor, and SF samples ₆The pressure of gas and corresponding temperature are according to testing the accurate SF that is drawn ₆The mathematical model that concerns between gaseous tension and the temperature adopts singlechip technology, calculates SF automatically ₆The density value of gas (20 ℃ relevant pressure values) by communication interface, is finished the teletransmission function then.Pressure transducer 9 is fixed on the joint 1 by the second sweet seal 3 below the density monitor movement, and temperature sensor 13 is right-hand joint 1, is fixed on the joint 1 by the first sweet seal 14.Circuit board 6 is fixed on the base plate of watchcase 5 below contact 2.

The utility model pointer-type SF ₆The innovation of gas density relay is well traditional pointer SF ₆Gas density relay and digital density monitor organically combine, and utilize the characteristics of the pure mechanical composition of traditional pointer density monitor, have the advantage of not being afraid of electromagnetic interference (EMI), overcome electromagnetic interference (EMI) fully.It mainly participates in the corresponding control of switch, can safety work; Utilize microelectric technique again, have communication teletransmission function because this part it only finish the data remote communication task of density value, realize SF ₆The SF of switch ₆The on-line monitoring of gas density value.Therefore the utility model had both had the advantage that traditional gas density relay is not afraid of electromagnetic interference (EMI), and electromagnetic interference (EMI) can not influence the control of switch, has digital technology again, finished communication teletransmission function, realized SF ₆The on-line monitoring of gas density can be applied in unattended operation transformer station well.

Claims

1. pointer SF ₆Gas density relay, comprise pointer density monitor body, it is characterized in that it also comprises one by power supply, pressure and temperature signal sampling input block, the magnification processing that links to each other with this pressure and temperature signal sampling input block with link to each other with this magnification processing and finish the circuit board that the single-chip microcomputer of teletransmission is formed by its communication interface.