CN212366436U - PT intelligent monitoring and alarming device for high-medium voltage GIS - Google Patents

Abstract

The utility model discloses a PT intelligent monitoring alarm device for on high-and-medium-voltage GIS, its technical scheme is: including the CPU circuit, CPU circuit output is equipped with true significant value collection module and buffer circuit, true significant value collection module and buffer circuit output are equipped with ABC three-phase PT output circuit, CPU circuit output is equipped with the power and reports an emergency and asks for help or increased vigilance indicating circuit, RS communication module circuit and supervision to report an emergency and ask for help or increased vigilance output relay circuit, ABC three-phase PT output circuit includes AD BC three-phase mutual-inductor signal-100V, the beneficial effects of the utility model are that: through the design of circuits such as CPU circuit, true effective value collection module and isolating circuit, ABC three-phase PT output circuit, make the utility model discloses anti common mode interference ability is strong, and noise immunity is good, and whole interference killing feature is strong, and communication distance is far away, can fine adaptation on-the-spot interference environment, simultaneously the utility model discloses circuit design is simple, and interference killing feature is strong, and occupation space is little on the circuit board.

Description

PT intelligent monitoring and alarming device for high-medium voltage GIS

Technical Field

The utility model relates to a high and medium voltage GIS system technical field, concretely relates to PT intelligent monitoring alarm device for on high and medium voltage GIS.

Background

With the development requirements of digitalization and networking of power transmission and transformation, the intelligent monitoring and alarming device can monitor the state of the field PT, alarm faults and remotely transmit the information to a remote terminal.

The prior art has the following defects: the traditional high-medium voltage GIS system detects and monitors the working state of PT through intelligent terminal equipment, and processes the PT together with other electrical signals, and because the field voltage level is higher, various interferences exist, so the normal working state of the PT cannot be intuitively reflected, the potential safety hazard existing in the system cannot be timely warned, the cost is higher, and products which can carry out professional, working logic and fault state monitoring on the PT are not seen in the current GIS supply market.

Therefore, it is necessary to invent a PT intelligent monitoring and warning device for use in high and medium voltage GIS.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a PT intelligent monitoring alarm device for on high-and-medium-voltage GIS, through the design of circuits such as CPU circuit, true effective value collection module and isolating circuit, ABC three-phase PT output circuit, make the utility model discloses anti common mode interference ability is strong, and anti noise interference nature is good, and whole interference killing feature is strong, and communication distance is far away, can fine adaptation on-the-spot interference environment, simultaneously the utility model discloses circuit design is simple, and is small, and interference killing feature is strong, and occupation space is little on the circuit board to solve present GIS system supply of material market and not see this kind can carry out the problem of professional, the product that service logic and fault condition were kept watch on to the PT.

In order to achieve the above object, the present invention provides the following technical solutions: the PT intelligent monitoring and alarming device used on the high-medium voltage GIS comprises a CPU circuit, wherein the output end of the CPU circuit is provided with a true effective value acquisition module and an isolation circuit, the output ends of the true effective value acquisition module and the isolation circuit are provided with an ABC three-phase PT output circuit, and the output end of the CPU circuit is provided with a power supply, an alarm indication circuit, an RS communication module circuit and a monitoring alarm output relay circuit;

the ABC three-phase PT output circuit comprises an A/B/C three-phase mutual inductor signal-100V, and an A-phase miniature compact mutual inductor, a B-phase miniature compact mutual inductor and a C-phase miniature compact mutual inductor are arranged at the signal-100V output end of the A/B/C three-phase mutual inductor;

the power supply and alarm indicating circuit comprises a two-color LED isolation driving circuit, and the output end of the two-color LED isolation driving circuit is provided with three two-color 8mm LED lamps;

the RS communication module circuit comprises an RS485 isolation communication circuit, and the output end of the RS485 isolation communication circuit is provided with a communication output terminal;

the monitoring alarm output relay circuit comprises a power failure alarm isolation output circuit and a fault alarm isolation output circuit, wherein a power failure alarm protection output terminal is arranged at the output end of the power failure alarm isolation output circuit, and a fault alarm protection output terminal is arranged at the output end of the fault alarm isolation output circuit.

Preferably, the input end of the CPU circuit is provided with a power supply circuit.

Preferably, the power supply circuit comprises a power supply AC/DI-DC module.

Preferably, the output end of the power supply AC/DI-DC module is provided with a power supply indicator lamp.

Preferably, the A-phase miniature compact mutual inductor, the B-phase miniature compact mutual inductor and the C-phase miniature compact mutual inductor are all arranged at the input ends of the true effective value acquisition module and the isolation circuit.

Preferably, the true effective value acquisition module and the isolation circuit comprise a true effective value acquisition chip and an isolation circuit.

The utility model has the advantages that:

the utility model discloses a CPU circuit, true effective value collection module and isolation circuit, ABC three-phase PT output circuit's design makes the utility model discloses anti common mode interference ability is strong, and noise immunity is good, and whole interference killing feature is strong, and communication distance is far away, can fine adaptation scene interference environment, simultaneously the utility model discloses circuit design is simple, and is small, and interference killing feature is strong, and occupation space is little on the circuit board.

Drawings

Fig. 1 is an overall schematic view provided by the present invention;

in the figure: 1CPU circuit, 2 true effective value acquisition module and isolation circuit, 3 ABC three-phase PT output circuit, 4 power supply and alarm indicating circuit, 5 RS485 communication module circuit, 6 monitoring alarm output relay circuit, 7A/B/C three-phase mutual inductor signal-100V, 8A phase miniature compact mutual inductor, 9B phase miniature compact mutual inductor, 10C phase miniature compact mutual inductor, 11 double-color LED isolation driving circuit, 12 double-color three-8 mm LED lamps, 13 RS485 isolation communication circuit, 14 communication output terminal, 15 power failure alarm isolation output circuit, 16 fault alarm isolation output circuit, 17 power failure alarm protection output terminal, 18 fault alarm protection output terminal, 19 power supply circuit, 20 power supply AC/DI-DC module and 21 power supply indicating lamp.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Referring to the attached figure 1, the utility model provides a PT intelligent monitoring alarm device for high and medium voltage GIS, including CPU circuit 1, CPU circuit 1 output is equipped with true effective value collection module and isolating circuit 2, true effective value collection module and isolating circuit 2 output is equipped with ABC three-phase PT output circuit 3, CPU circuit 1 output is equipped with power and reports an emergency and asks for help or increased vigilance indicating circuit 4, RS485 communication module circuit 5 and monitoring and reporting an emergency and asking for help or increased vigilance output relay circuit 6;

the ABC three-phase PT output circuit 3 comprises an A/B/C three-phase transformer signal-100V 7, and the output end of the A/B/C three-phase transformer signal-100V 7 is provided with an A-phase miniature compact transformer 8, a B-phase miniature compact transformer 9 and a C-phase miniature compact transformer 10;

the power supply and alarm indicating circuit 4 comprises a two-color LED isolation driving circuit 11, and the output end of the two-color LED isolation driving circuit 11 is provided with three 8mm two-color LED lamps 12;

the RS485 communication module circuit 5 comprises an RS485 isolation communication circuit 13, and the output end of the RS485 isolation communication circuit 13 is provided with a communication output terminal 14;

the monitoring alarm output relay circuit 6 comprises a power failure alarm isolation output circuit 15 and a fault alarm isolation output circuit 16, wherein the output end of the power failure alarm isolation output circuit 15 is provided with a power failure alarm protection output terminal 17, and the output end of the fault alarm isolation output circuit 16 is provided with a fault alarm protection output terminal 18.

Further, the input end of the CPU circuit 1 is provided with a power supply circuit 19.

Further, the power supply circuit 19 includes a power supply AC/DI-DC module 20.

Further, a power indicator lamp 21 is arranged at the output end of the power supply AC/DI-DC module 20.

Further, the a-phase miniature compact transformer 8, the B-phase miniature compact transformer 9 and the C-phase miniature compact transformer 10 are all arranged at the input end of the true effective value acquisition module and the isolation circuit 2.

Further, the true effective value collection module and the isolation circuit 2 include a true effective value collection chip and an isolation circuit.

The utility model discloses a use as follows: when the utility model is used, the normal electrified output of the voltage of the ABC three-phase PT output circuit 3 is 100V, two groups of monitoring alarm relays do not act, the two-color three 8-mm LED lamps 12 display green, when any one phase is disconnected, the phase is electrified, the corresponding two-color three 8-mm LED lamps 12 turn red, the fault alarm relay acts, when the voltage of the ABC three-phase PT output circuit 3 is detected to be lower than 25V, the power failure alarm relay acts, the RS485 isolation communication circuit 13 adopts the combination of a balance driver and a differential receiver to transmit the state of the ABC three-phase PT output circuit 3 to background equipment such as an intelligent terminal, the common-mode interference resistance is strong, the noise interference resistance is good, the whole interference resistance is strong, the communication distance is far, the field interference environment can be well adapted, the detection circuit uses a high-reliability true effective value acquisition chip and a sensor of the American ADI company, the power supply and alarm indicating circuit 4 is a long-life LED indicating lamp with excellent use performance, a quick Tak long-life load relay is used at a monitoring alarm outlet, a Jinsheng TD501D485-HRS485 communication module is used for communicating with a background, an integrated power supply isolation and electrical isolation is used as the Jinsheng TD501D485-HRS485 communication module, and an RS485 interface module integrating an RS485 interface and a bus protection device is simple in circuit design, small in size, strong in anti-interference capability and small in occupied space on a circuit board.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.

Claims (6)

1. A PT intelligent monitoring alarm device used on a high-medium voltage GIS comprises a CPU circuit (1), and is characterized in that: the output end of the CPU circuit (1) is provided with a true effective value acquisition module and an isolation circuit (2), the output ends of the true effective value acquisition module and the isolation circuit (2) are provided with an ABC three-phase PT output circuit (3), and the output end of the CPU circuit (1) is provided with a power supply and alarm indication circuit (4), an RS485 communication module circuit (5) and a monitoring alarm output relay circuit (6);

the ABC three-phase PT output circuit (3) comprises an A/B/C three-phase mutual inductor signal-100V (7), and an A-phase miniature compact mutual inductor (8), a B-phase miniature compact mutual inductor (9) and a C-phase miniature compact mutual inductor (10) are arranged at the output end of the A/B/C three-phase mutual inductor signal-100V (7);

the power supply and alarm indicating circuit (4) comprises a two-color LED isolation driving circuit (11), and the output end of the two-color LED isolation driving circuit (11) is provided with three 8mm double-color LED lamps (12);

the RS485 communication module circuit (5) comprises an RS485 isolation communication circuit (13), and the output end of the RS485 isolation communication circuit (13) is provided with a communication output terminal (14);

the monitoring alarm output relay circuit (6) comprises a power failure alarm isolation output circuit (15) and a fault alarm isolation output circuit (16), wherein the output end of the power failure alarm isolation output circuit (15) is provided with a power failure alarm protection output terminal (17), and the output end of the fault alarm isolation output circuit (16) is provided with a fault alarm protection output terminal (18).

2. A PT intelligent monitoring and alarming device for high and medium voltage GIS as claimed in claim 1, wherein: the input end of the CPU circuit (1) is provided with a power supply circuit (19).

3. A PT intelligent monitoring and alarming device for high and medium voltage GIS as claimed in claim 2, wherein: the power supply circuit (19) includes a power supply AC/DI-DC module (20).

4. A PT intelligent monitoring and alarming device for high and medium voltage GIS as claimed in claim 3, wherein: and a power indicator lamp (21) is arranged at the output end of the power supply AC/DI-DC module (20).

5. A PT intelligent monitoring and alarming device for high and medium voltage GIS as claimed in claim 1, wherein: the A-phase miniature compact mutual inductor (8), the B-phase miniature compact mutual inductor (9) and the C-phase miniature compact mutual inductor (10) are all arranged at the input ends of the true effective value acquisition module and the isolation circuit (2).

6. A PT intelligent monitoring and alarming device for high and medium voltage GIS as claimed in claim 1, wherein: the true effective value acquisition module and the isolation circuit (2) comprise a true effective value acquisition chip and an isolation circuit.

Images