CN2456349Y

CN2456349Y - Earthed monitoring instruments

Info

Publication number: CN2456349Y
Application number: CN 00265849
Authority: CN
Inventors: 南吉成
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-18
Filing date: 2000-12-18
Publication date: 2001-10-24
Anticipated expiration: 2010-12-18

Abstract

The utility model discloses an earthed monitoring instrument, which is composed of a control circuit U1, a sensing signal processing circuit U2, a display screen U3, a protecting relay U4, a standard signal generating and driving circuit U5, a solid earthed circuit U6, a load circuit U7 and an inductor U8, wherein, the inductor U8 is fixed on a load; the load circuit U7 is connected with the solid earthed circuit U6. After any part of the load or a component is earthed, the part or the component can be displayed on the display screen U3 through the operation of each circuit, so a processing operation can be carried out conveniently and quickly. The utility model has the advantages of simple structure, convenient operation, low cost, quick actions, reliable and stable operation and strong antijamming performance, and the utility model can be used in different alternating current load circuits and different direct current load circuits.

Description

Earthing monitor

The utility model relates to technical field of electricity, specifically a kind of earthing monitor.

At present, earth protective device being arranged on railway locomotive, in case grounding phenomenon occurs, can only protect, specifically is which parts or position ground connection but can not indicate, and so just need manually come further by taking out stitches or shaking insulation and judge that labour intensity is big, and efficient is low; In addition at present to the time and during ground connection and earth-free " swinging earth " phenomenon also can only be protected, can not indicate concrete parts or position, therefore " swinging earth " problem also can't solve till now.

The purpose of this utility model provides a kind of load circuit and ground connection in a single day occurs, not only can in time protect, and can indicate the earthing monitor of concrete which parts or position ground connection, and it has reduced labour intensity, has improved operating efficiency.

The purpose of this utility model is achieved in that

Earthing monitor, it is by controller circuitry, the induced signal treatment circuit, display screen, protection relay, standard signal produces and drive circuit, the dead earth circuit, load circuit, compositions such as inductor, it is characterized in that the dead earth circuit is by resistance R 1, R2, R3, R4, diode D1, rectifier diode D2-D5, triode V1, V2, DC power supply Ec, Vcc, relay J is formed, concrete type of attachment is: resistance R 1 one termination DC power supply Vcc positive poles, the end that another termination transformer T1 is elementary, the collector electrode of triode V2 connects the elementary other end of transformer T1, the end of the base stage connecting resistance R2 of transformer T1, emitter connects the negative pole of power Vcc, and another termination standard signal of resistance R 2 produces and drive circuit; On the base stage and emitter that the two ends of T1 level of transformer and resistance R 3 are attempted by triode V1, diode D1 negative electrode connects the collector electrode of triode V1, the emitter that anode meets V1; Rectifier diode D2-D5 forms full-wave rectification bridge, the collector electrode of B termination V1, C termination DC power supply Ec positive pole, the end of A terminating resistor R4, D termination load circuit, the end of another relay termination J of resistance R 4, the emitter of another termination triode V1 of relay J, the minus earth of DC power supply Ec.The type of attachment of dead earth circuit can also be: rectifier diode D3, D4, D5 in the circuit are taken away, only keep D2, constitute halfwave rectifier.The type of attachment of dead earth circuit can also be: rectifier diode D2, D3, D4, D5 in the circuit are taken away, and DC power supply Ec directly connects the collector electrode of triode V1.The type of attachment of dead earth circuit can also be: the DC power supply Ec in the circuit is taken away, and the C of full-wave rectification bridge holds direct ground connection.

The utility model is simple in structure, is convenient to operation, and cost is low, and the scope of application is wide, and is agile, and working stability, reliable is anti-interference strong.

Below in conjunction with accompanying drawing the utility model is described in detail:

Fig. 1 is the utility model working envelope figure

Fig. 2 is the circuit diagram of dead earth circuit in the utility model

Fig. 3, Fig. 4, Fig. 5 are other type of attachment of Fig. 2

Consult Fig. 1, U1 is a controller circuitry, and it adopts prior art microprocessor 80C196 etc., and effect is to the induced signal analysis and judgement, decomposites the load ground signalling, and action, the demonstration of display screen and the generation of standard signal of control protection relay; U2 is the induced signal treatment circuit, and it adopts amplifier, comparator etc., and effect is that induced signal is carried out processed, becomes the signal that controller U1 can discern; U3 is a display screen, and effect is position or the parts that show ground connection; U4 is a protection relay, and effect is if any ground connection, the action of controller circuitry control relay, execute protection; U5 is that standard signal produces and drive circuit, and it adopts logic gates, and effect is the generation standard signal and drives; U7 is a load circuit, and it is the object of ground protection, can be that direct current (or arteries and veins stream) circuit also can be an alternating current circuit; U8 is an inductor, and effect is to gather the load circuit ground signalling and send induced signal.

Consult Fig. 1, Fig. 2; when load circuit ground connection; then the dead earth circuit constitutes the loop; send into standard signal by triode V1 to dead earth circuit U 6; the inductor of installing on the load circuit is gathered ground signalling; produce induced signal; this signal is sent into induced signal treatment circuit U2; send into controller circuitry U1 after treatment; U1 decomposites ground signalling to its entrained information analysis, judgement, processing; show grounded parts or position by display screen U3, the output protection signal is given protection relay U4 simultaneously, makes protection relay U4 action.

Consult Fig. 3, it is the another kind of form of dead earth circuit U 6, and the rectifier diode D3-D5 in the circuit is taken away, and only keeps D2, constitutes halfwave rectifier, and this kind form is mainly used in the AC load circuit.

Consult Fig. 4, it is the another kind of form of dead earth circuit U 6, and the rectifier diode D2-D5 in the circuit is all taken away, and the DC power supply Ec positive pole in the circuit connects the collector electrode of triode V1, and this kind form is mainly used in the DC load circuit.

Consult Fig. 5, the DC power supply Ec in the dead earth circuit U 6 can not have, and this kind form is used in the AC load circuit more.

Claims

1, a kind of earthing monitor, it is by controller circuitry, the induced signal treatment circuit, display screen, protection relay, standard signal produces and drive circuit, the dead earth circuit, load circuit, compositions such as inductor, it is characterized in that the dead earth circuit is by resistance R 1, R2, R3, R4, diode D1, rectifier diode D2-D5, triode V1, V2, DC power supply Ec, Vcc, relay J is formed, concrete type of attachment is: resistance R 1 one termination DC power supply Vcc positive poles, the end that another termination transformer T1 is elementary, the collector electrode of triode V2 connects the elementary other end of transformer T1, the end of the base stage connecting resistance R2 of transformer T1, emitter connects the negative pole of power Vcc, and another termination standard signal of resistance R 2 produces and drive circuit; On the base stage and emitter that the two ends of T1 level of transformer and resistance R 3 are attempted by triode V1, diode D1 negative electrode connects the collector electrode of triode V1, the emitter that anode meets V1; Rectifier diode D2-D5 forms full-wave rectification bridge, the collector electrode of B termination V1, C termination DC power supply Ec positive pole, the end of A terminating resistor R4, D termination load circuit, the end of another relay termination J of resistance R 4, the emitter of another termination triode V1 of relay J, the minus earth of DC power supply Ec.

2, earthing monitor according to claim 1 is characterized in that the type of attachment of described dead earth circuit can also be: rectifier diode D3, D4, D5 in the circuit are taken away, only keep D2, constitute halfwave rectifier.

3, earthing monitor according to claim 1, it is characterized in that the type of attachment of described dead earth circuit can also be: rectifier diode D2, D3, D4, D5 in the circuit are taken away, and DC power supply Ec directly connects the collector electrode of triode V1.

4, earthing monitor according to claim 1, it is characterized in that the type of attachment of described dead earth circuit can also be: the DC power supply Ec in the circuit is taken away, and the C of full-wave rectification bridge holds direct ground connection.