CN219329617U - Feeder loop circuit - Google Patents
Feeder loop circuit Download PDFInfo
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- CN219329617U CN219329617U CN202320042340.5U CN202320042340U CN219329617U CN 219329617 U CN219329617 U CN 219329617U CN 202320042340 U CN202320042340 U CN 202320042340U CN 219329617 U CN219329617 U CN 219329617U
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Abstract
The utility model relates to a feeder line loop circuit, which adopts a circuit breaker arranged on a main circuit; an output contact of the line protection device is arranged in the control circuit; the output contact of the circuit protection device controls the on-off of the circuit breaker; the feeder circuit is switched on and off, and the feeder circuit with the line protection device realizes stable circuit characteristics by arranging the line protection device in the feeder circuit and connecting the line, so that the technical problems in the aspects of circuit control and the like of the feeder circuit which are applied to fire protection and the like in the existing feeder circuit, such as the fact that relay circuit control is often used, but the relay circuit control has unstable circuit characteristics, and the feeder circuit cannot be applied to places needing accurate control.
Description
Technical Field
Embodiments of the present utility model relate to a control circuit, and more particularly, to a feeder loop circuit.
Background
In the existing feeder loop circuit, a relay circuit control is often used, however, the relay circuit control has unstable circuit characteristics, and there is no way to apply the feeder loop circuit to places where precise control is needed, such as the circuit control of a fire-fighting feeder loop. For this purpose, it is necessary to develop a feeder circuit with a circuit protection device having stable circuit characteristics.
Disclosure of Invention
An object of an embodiment of the present utility model is to provide a feeder loop circuit with a line protection device having stable circuit characteristics.
In order to achieve the above object, an embodiment of the present utility model provides a feeder loop circuit including:
a main circuit;
the circuit breaker is arranged on the main circuit;
the control circuit is provided with an output contact of the line protection device; the output contact of the circuit protection device controls the on-off of the circuit breaker; and switching on and off the feeder line loop circuit.
Further, the main circuit of the feeder loop circuit in the present utility model further includes:
an input power supply connected to the input end of the circuit breaker; the output end of the circuit breaker is connected with user equipment for feeding; a residual current transformer is sleeved between the output end of the circuit breaker and the user equipment; and the output end of the circuit breaker is also connected to the UA end, the UB end, the UC end and the UN end of the line protection device.
Further, the control circuit of the feeder loop circuit in the present utility model further includes:
the control power supply takes any one phase of the three-phase power supply; the control power supply is connected to one end of the first fuse; the other end of the first fuse is connected to the inlet end of a first normally open contact of the circuit breaker; the outgoing line end of the first normally open contact of the circuit breaker is connected to the incoming line end of the output contact of the line protection device;
the outgoing line end of the output contact of the line protection device is connected to the incoming line end of the coil of the circuit breaker; the outgoing line end of the coil of the circuit breaker is connected to a zero line;
the outgoing line end of the first normally open contact of the circuit breaker is connected to the incoming line end of the first intermediate relay coil; the outlet end of the first intermediate relay coil is connected to a zero line;
the outgoing line end of the first normally open contact of the circuit breaker is connected to the incoming line end of the first normally open contact of the first intermediate relay; the outgoing line end of the first normally open contact of the first intermediate relay is connected to the incoming line end of the operation signal lamp; the outgoing line end of the operation signal lamp is connected with a zero line;
the other end of the first fuse is connected to the wire inlet end of the first normally open contact of the second intermediate relay; the outlet end of the first normally open contact of the second intermediate relay is connected to the inlet end of the fault alarm signal lamp; the outlet end of the fault alarm signal lamp is connected to the zero line;
the other end of the first fuse is connected to the wire inlet end of the second normally open contact of the circuit breaker; the outlet end of the second normally open contact of the circuit breaker is connected to the inlet end of the second intermediate relay coil; the outlet end of the second intermediate relay coil is connected to the zero line;
the other end of the first fuse is connected to the wire inlet end of the second fuse; the outlet end of the second fuse is connected to a power supply of the line protection device; and an outlet end of the line protection device is connected to a zero line.
Further, IN the feeder line loop circuit of the present utility model, the IA end, IB end, IC end and IN end on the line protection device are respectively connected to the IA end, IB end and IC end of the current transformer; the IA 'end, the IB' end and the IC 'end of the line protection device are connected in short circuit and then are connected to the ground after being respectively connected with the Ia' end, the Ib 'end and the IC' end of the current transformer;
the DIC end on the line protection device is respectively connected to the wire inlet end of the second normally open contact of the second intermediate relay and the wire inlet end of the travel switch; the outlet end of the second normally open contact of the second intermediate relay is connected to the DI2 end on the line protection device;
the outlet end of the travel switch is connected with the inlet end of the second normally open contact of the first intermediate relay; the outlet end of the second normally open contact of the first intermediate relay is connected to the DI1 end on the line protection device;
the TIC end of the T1 end on the line protection device is respectively connected to the two ends of the temperature measuring probe PT 1000;
and an A1 end and a B1 end of the line protection device are connected with an RS-485 serial port or a Modbus communication line.
Further, in the feeder line loop circuit of the present utility model, the line protection device is a fire protection line protection device.
Further, in the feeder circuit of the utility model, the circuit breaker is an XT series shunt circuit breaker with auxiliary alarm.
Further, in the feeder line loop circuit, the residual current transformer is an LZT series current transformer; both ends of the residual current transformer ZCT are respectively connected to I of the line protection device PJ X Terminal and I X 'end'.
In the feeder line loop circuit, a third fuse, a fourth fuse and a fifth fuse are respectively arranged between the output end of the circuit breaker and the UA end, the UB end, the UC end and the UN end of the line protection device.
Compared with the prior art, the embodiment of the utility model adopts the arrangement of the circuit breaker on the main circuit; an output contact of the line protection device is arranged in the control circuit; the output contact of the circuit protection device controls the on-off of the circuit breaker; the feeder circuit is switched on and off, and the feeder circuit with the line protection device realizes stable circuit characteristics by arranging the line protection device in the feeder circuit and connecting the line, so that the technical problems in the aspects of circuit control and the like of the feeder circuit which are applied to fire protection and the like in the existing feeder circuit, such as the fact that relay circuit control is often used, but the relay circuit control has unstable circuit characteristics, and the feeder circuit cannot be applied to places needing accurate control.
Drawings
FIG. 1 is a schematic diagram of a main circuit structure of the present utility model;
FIG. 2 is a schematic diagram of a control circuit structure according to the present utility model;
fig. 3 is a schematic connection diagram of the line protection device of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.
Embodiments of the present utility model relate to a feeder loop circuit, as shown in fig. 1, 2, 3, comprising:
the main circuit in the feeder circuit in this embodiment is mainly used for supplying power to the feeder circuit;
a breaker QF is arranged on the main circuit; the breaker QF is mainly used for switching on and off on a main circuit.
An output contact PJ-1 of the line protection device is arranged in the control circuit; the output contact PJ-1 of the line protection device controls the on-off of the breaker QF; and switching on and off the feeder circuit. The output contact PJ-1 of the line protection device in the control circuit in this embodiment controls the on-off of the circuit breaker QF, so that the feeder circuit with the line protection device realizes stable circuit characteristics by using the line protection device PJ and through connection of lines, and solves the technical problems in the existing feeder circuit, such as circuit control of the feeder circuit applied to fire protection, that the circuit control of the relay often uses relay, but the circuit control of the relay has unstable circuit characteristics, and there is no way to apply the feeder circuit to places needing precise control, such as circuit control of the feeder circuit applied to fire protection.
In order to achieve the above technical effects, the main circuit in the feeder loop circuit in this embodiment, as shown in fig. 1, 2 and 3, further includes:
the input power sources L1, L2, L3, N are supplied as power sources of the main circuit in the feeder circuit in the present embodiment, and the input power sources L1, L2, L3, N are connected to the input terminal of the circuit breaker QF; the output end of the breaker QF is connected with user equipment for feeding; a residual current transformer ZCT is sleeved between the output end of the breaker QF and the user equipment; u connected to the line protection device PJ at the same time as the output ends L11, L12, L13 of the circuit breaker QF A End, U B End, U C End, U N On the end.
In order to achieve the above technical effects, the control circuit in the feeder loop circuit in this embodiment, as shown in fig. 1, 2 and 3, further includes:
the control power supply L1 provides energy for the feeder line loop circuit, and the control power supply takes any one phase of three-phase power supplies L1, L2 and L3; the control power supply L1 is connected to one end of the first fuse FU; the other end of the first fuse FU is connected to the wire inlet end of a first normally open contact QF-1 of the circuit breaker; the outlet end of the first normally open contact QF-1 of the circuit breaker is connected to the inlet end of the output contact PJ-1 of the line protection device; the first fuse FU is for preventing a short circuit of the control power supply L1.
The outgoing line end of the output contact PJ-1 of the line protection device is connected to the incoming line end of the coil MX of the circuit breaker; the outgoing line end of a coil MX of the circuit breaker is connected to the zero line N; after the first normally open contact QF-1 of the circuit breaker is connected in series with the output contact PJ-1 of the line protection device, when the first normally open contact QF-1 of the circuit breaker is closed, the coil MX of the circuit breaker is controlled to be attracted, so that the circuit breaker QF is closed, and the effect of powering on a main circuit is realized.
The outlet end of the first normally open contact QF-1 of the circuit breaker is connected to the inlet end of the first intermediate relay coil KA 1; the outlet end of the first intermediate relay coil KA1 is connected to the zero line N; the first normally open contact QF-1 of the circuit breaker controls the first intermediate relay coil KA1 to be attracted, so that the function of auxiliary contact capacity expansion is achieved.
The outlet end of the first normally open contact QF-1 of the circuit breaker is connected to the inlet end of the first normally open contact KA1-1 of the first intermediate relay; the outgoing line end of the first normally open contact KA1-1 of the first intermediate relay is connected to the incoming line end of the operation signal lamp HR 1; the outgoing line end of the signal lamp HR1 is operated to a zero line N; through; the first normally open contact KA1-1 of the first intermediate relay is closed, so that the operation signal lamp HR1 is controlled to be switched on, and the normal operation prompt function is achieved.
The other end of the first fuse FU is connected to the wire inlet end of a first normally open contact KA2-1 of the second intermediate relay; the outlet end of the first normally open contact KA2-1 of the second intermediate relay is connected to the inlet end of the fault alarm signal lamp HY; the outlet end of the fault alarm signal lamp HY is connected to a zero line N; the first normally open contact KA2-1 of the second intermediate relay controls the fault alarm signal lamp HY to realize the function of operation prompt when the feeder circuit in the embodiment has faults.
The other end of the first fuse FU is connected to the inlet terminal of a second normally open contact QF-2 of the circuit breaker; the outlet end of the second normally open contact QF-2 of the circuit breaker is connected to the inlet end of the second intermediate relay coil KA 2; the outlet end of the second intermediate relay coil KA2 is connected to the zero line N; the second normally open contact QF-2 of the circuit breaker controls the connection of the second intermediate relay coil KA2, and the signal for normal operation of the circuit breaker QF is input to the line protection device PJ.
The other end of the first fuse FU is connected to the wire inlet end of the second fuse FU 2; the outlet end of the second fuse FU2 is connected to a power supply of the line protection device PJ; the outgoing line end of the line protection device PJ is connected to the zero line N. The circuit is used for supplying power to the line protection device PJ.
IN order to achieve the above technical effects, as shown IN fig. 1, 2 and 3, the control circuit IN the feeder circuit IN the present embodiment is connected to the IA end, IB end, IC end and IN end of the current transformer TAU, TAV, and the IA end, IB end and IC end of the TAW, respectively, on the line protection device PJ; the IA 'end, the IB' end and the IC 'end of the line protection device PJ are short-circuited and then are respectively connected with the Ia' end, the Ib 'end and the IC' end of the current transformer TAU, the TAV and the TAW and then are connected to the grounding PE; the current transformers TAU, TAV and TAW are connected to the line protection device PJ, so that the line protection device PJ monitors the current in the line.
The DIC end on the line protection device PJ is respectively connected to the wire inlet end of the second normally open contact KA2-2 of the second intermediate relay and the wire inlet end of the travel switch SQ; the outlet end of the second normally open contact KA2-2 of the second intermediate relay is connected to the DI2 end on the line protection device PJ;
the outlet end of the travel switch SQ is connected with the inlet end of the second normally open contact KA1-2 of the first intermediate relay; the outlet end of the second normally open contact KA1-2 of the first intermediate relay is connected to the DI1 end on the line protection device PJ; after the line protection device PJ is connected with the inlet end of the second normally open contact KA2-2 of the second intermediate relay and the travel switch SQ, the switching-on state of the circuit breaker QF is input into the line protection device PJ, and the switching-on in-place state of the circuit breaker QF is input into the line protection device PJ through the travel switch SQ, so that the line protection device PJ can judge the state of the circuit breaker QF, and the feeding safety is ensured.
The TIC end of the T1 end on the line protection device PJ is respectively connected to the two ends of the temperature measuring probe PT 1000; a temperature probe PT1000 is arranged on the line protection device PJ and is used for measuring the temperature of the whole feeder line loop circuit and protecting the whole feeder line loop circuit;
and an A1 end and a B1 end on the line protection device PJ are connected with an RS-485 serial port or a Modbus communication line. And an RS-485 serial port or a Modbus communication line is arranged on the line protection device PJ, so that the line protection device PJ realizes remote communication capability.
In order to achieve the above technical effects, the control circuit in the feeder circuit in this embodiment, as shown in fig. 1, 2 and 3, the line protection device PJ is a fire protection type line protection device. The line protection device PJ in the present embodiment may be used in fire protection, but is not limited to being used in fire protection.
In order to achieve the above technical effects, the control circuit in the feeder circuit in this embodiment is a XT series shunt breaker with auxiliary alarm, as shown in fig. 1, 2 and 3. The circuit breaker QF adopts an XT series shunt circuit breaker with auxiliary alarm, and can realize the functions.
In order to achieve the above technical effects, in the feeder circuit in this embodiment, as shown in fig. 1, 2 and 3, the residual current transformer ZCT is an LZT series current transformer; two ends of the residual current transformer ZCT are respectively connected to I of the line protection device PJ X Terminal and I X ' end; the residual current transformer ZCT is used for detecting the leakage current condition in the feeder circuit in the embodiment, the residual current transformer ZCT participates in controlling the on-off of the router QF, and when the leakage current in the feeder circuit in the embodiment exists, the disconnection of the controller QF can be controlled.
In order to achieve the above technical effects, the control circuit in the feeder circuit in the present embodiment is, as shown in fig. 1, 2 and 3, arranged between the output terminals L11, L12 and L13 of the circuit breaker QF and the U of the line protection device PJ A End, U B End, U C End, U N The third fuse FU3, the fourth fuse FU4 and the fifth fuse FU5 are respectively arranged between the ends. The third fuse FU3, the fourth fuse FU4, and the fifth fuse FU5 are used to protect the line protection device PJ from the occurrence of a short circuit.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.
Claims (8)
1. A feeder loop circuit, comprising:
a main circuit;
the circuit breaker QF is arranged on the main circuit;
a control circuit in which an output contact PJ-1 of the line protection device is provided; the output contact PJ-1 of the line protection device controls the on-off of the breaker QF; and switching on and off the feeder line loop circuit.
2. The feeder loop circuit of claim 1, wherein said main circuit further comprises:
input power sources L1, L2, L3 and N are connected to the input end of the breaker QF; the output end of the breaker QF is connected with user equipment for feeding; a residual current transformer ZCT is sleeved between the output end of the breaker QF and the user equipment; at the same time of the output ends L11, L12 and L13 of the circuit breaker QF, the circuit breaker QF is also connected to a U of a line protection device PJ A End, U B End, U C End, U N On the end.
3. The feeder loop circuit of claim 1, wherein said control circuit further comprises:
the control power supply L1, wherein the control power supply L1 takes any one phase of three-phase power supplies L1, L2 and L3; the control power supply L1 is connected to one end of the first fuse FU; the other end of the first fuse FU is connected to the wire inlet end of a first normally open contact QF-1 of the circuit breaker; the outgoing line end of the first normally open contact QF-1 of the circuit breaker is connected to the incoming line end of the output contact PJ-1 of the line protection device;
the outgoing line end of the output contact PJ-1 of the line protection device is connected to the incoming line end of the coil MX of the circuit breaker; an outgoing line end of a coil MX of the circuit breaker is connected to a zero line N;
the outlet end of the first normally open contact QF-1 of the circuit breaker is connected to the inlet end of the first intermediate relay coil KA 1; the outlet end of the first intermediate relay coil KA1 is connected to a zero line N;
the outlet end of the first normally open contact QF-1 of the circuit breaker is connected to the inlet end of the first normally open contact KA1-1 of the first intermediate relay; the outgoing line end of the first normally open contact KA1-1 of the first intermediate relay is connected to the incoming line end of the operation signal lamp HR 1; the outgoing line end of the operation signal lamp HR1 is connected with a zero line N;
the other end of the first fuse FU is connected to the inlet wire end of a first normally open contact KA2-1 of the second intermediate relay; the outlet end of the first normally open contact KA2-1 of the second intermediate relay is connected to the inlet end of the fault alarm signal lamp HY; the outgoing line end of the fault alarm signal lamp HY is connected to a zero line N;
the other end of the first fuse FU is connected to the inlet end of a second normally open contact QF-2 of the circuit breaker; the outlet end of the second normally open contact QF-2 of the circuit breaker is connected to the inlet end of the second intermediate relay coil KA 2; the outlet end of the second intermediate relay coil KA2 is connected to the zero line N;
the other end of the first fuse FU is connected to the wire inlet end of the second fuse FU 2; the outlet end of the second fuse FU2 is connected to a power supply of the line protection device PJ; the outgoing line end of the line protection device PJ is connected to the zero line N.
4. A feeder loop circuit according to claim 3, wherein the IA, IB, IC, IN terminals of the line protection device PJ are connected to the IA, IB, IC terminals of the current transformer TAU, TAV, TAW, respectively; the IA 'end, the IB' end and the IC 'end of the line protection device PJ are short-circuited and then are respectively connected with the Ia' end, the Ib 'end and the IC' end of the current transformer TAU, the TAV and the TAW and then are connected to the grounding PE;
the DIC end on the line protection device PJ is respectively connected to the wire inlet end of the second normally open contact KA2-2 of the second intermediate relay and the wire inlet end of the travel switch SQ; the outlet end of the second normally open contact KA2-2 of the second intermediate relay is connected to the DI2 end on the line protection device PJ;
the outlet end of the travel switch SQ is connected with the inlet end of the second normally open contact KA1-2 of the first intermediate relay; the outlet end of the second normally open contact KA1-2 of the first intermediate relay is connected to the DI1 end on the line protection device PJ;
the TIC end of the T1 end on the line protection device PJ is respectively connected to the two ends of the temperature measuring probe PT 1000;
and an A1 end and a B1 end of the line protection device PJ are connected with an RS-485 serial port or a Modbus communication line.
5. The feeder loop circuit of claim 4, wherein the line protection device PJ is a fire protection line protection device.
6. The feeder loop circuit of claim 1, wherein the circuit breaker QF is an XT series shunt circuit breaker with auxiliary alarm.
7. The feeder circuit of claim 2, wherein the residual current transformer ZCT is a LZT series current transformer; both ends of the residual current transformer ZCT are respectively connected to I of the line protection device PJ X Terminal and I X 'end'.
8. Feeder circuit according to claim 2, characterized in that at the output terminals L11, L12, L13 of the circuit breaker QF and the U of the line protection device PJ A End, U B End, U C End, U N The third fuse FU3, the fourth fuse FU4 and the fifth fuse FU5 are respectively arranged between the ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320042340.5U CN219329617U (en) | 2023-01-09 | 2023-01-09 | Feeder loop circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320042340.5U CN219329617U (en) | 2023-01-09 | 2023-01-09 | Feeder loop circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219329617U true CN219329617U (en) | 2023-07-11 |
Family
ID=87065013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320042340.5U Active CN219329617U (en) | 2023-01-09 | 2023-01-09 | Feeder loop circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219329617U (en) |
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2023
- 2023-01-09 CN CN202320042340.5U patent/CN219329617U/en active Active
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