CN116031875A - Feeder loop circuit - Google Patents
Feeder loop circuit Download PDFInfo
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- CN116031875A CN116031875A CN202310023226.2A CN202310023226A CN116031875A CN 116031875 A CN116031875 A CN 116031875A CN 202310023226 A CN202310023226 A CN 202310023226A CN 116031875 A CN116031875 A CN 116031875A
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- normally open
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Abstract
The invention 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 invention 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 invention 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 invention 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 invention 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 invention 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 invention, 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 invention, the line protection device is a fire protection line protection device.
Further, in the feeder circuit of the invention, 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 a 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 invention 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 invention;
FIG. 2 is a schematic diagram of a control circuit structure according to the present invention;
fig. 3 is a schematic connection diagram of the line protection device of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention 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 invention, 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 invention 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;
providing a circuit breaker (QF) on the main circuit; the circuit 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; an output contact (PJ-1) of the line protection device controls the on-off of a 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 the 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 that in the existing feeder circuit, the circuit control of a relay is often used, but the circuit control of the relay has unstable circuit characteristics, and the feeder circuit cannot be applied to places needing accurate control, such as the circuit control of a 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:
input power sources (L1, L2, L3, N) are used as feeders in the present embodimentA main circuit power supply in the line circuit, wherein input power sources (L1, L2, L3, N) are connected to the input end of the circuit breaker (QF); the output end of the circuit breaker (QF) is connected with user equipment to feed electricity; a residual current transformer (ZCT) is sleeved between the output end of the circuit breaker (QF) and the user equipment; u which is also connected to the line protection device (PJ) at the same time as the output terminals (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); a 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 used for preventing 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; an 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 energizing the main circuit is realized.
The outlet end of a first normally open contact (QF-1) of the circuit breaker is connected to the inlet end of a first intermediate relay coil (KA 1); the outlet end of the first intermediate relay coil (KA 1) is connected to a zero line (N); the first normally open contact (QF-1) of the circuit breaker controls the first intermediate relay coil (KA 1) to be attracted, so that the function of expanding the auxiliary contact 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 (KA 1-1) of the first intermediate relay; the outlet end of the first normally open contact (KA 1-1) of the first intermediate relay is connected to the inlet end of the operation signal lamp (HR 1); the outgoing line end of the operation signal lamp (HR 1) is connected with the zero line (N); through; the first normally open contact (KA 1-1) of the first intermediate relay is closed, and the operation signal lamp (HR 1) is controlled to be connected, so that 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 (KA 2-1) of the second intermediate relay; the outlet end of the first normally open contact (KA 2-1) 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 (KA 2-1) 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 wire 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 (KA 2) 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 (KA 2) to input a signal for the circuit protection device (PJ) to normally operate the circuit breaker (QF).
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 (FU 2) is connected to a power supply of the line protection device (PJ); the outlet end of the line protection device (PJ) is connected to the neutral 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 IA, IB and IC ends of the current transformer (TAU, TAV, TAW) at IA, IB, IC ends of the line protection device (PJ), respectively; IA 'end, IB' end and IC 'end on the line protection device (PJ) are short-circuited and then are respectively connected with IA' end, IB 'end and IC' end of the current transformer (TAU, TAV, TAW) and then are connected to the ground (PE); the monitoring of the current in the line by the line protection device (PJ) is achieved by connecting a current transformer (TAU, TAV, TAW) to the line protection device (PJ).
The DIC end on the line protection device (PJ) is respectively connected to the inlet wire end of the second normally open contact (KA 2-2) of the second intermediate relay and the inlet wire end of the travel Switch (SQ); the outlet end of the second normally open contact (KA 2-2) 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 (KA 1-2) of the first intermediate relay; the outlet end of the second normally open contact (KA 1-2) 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 line inlet end of the second normally open contact (KA 2-2) of the second intermediate relay and the travel Switch (SQ), the closing state of the circuit breaker (QF) is input into the line protection device (PJ), and the closing 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 feed 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 circuit and protecting the whole feeder line circuit;
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. 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, is a fire protection circuit protection device (PJ). 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, as shown in fig. 1, 2 and 3, the control circuit in the feeder line loop circuit in this embodiment is a residual current transformer (ZCT) which 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 to detect the leakage current condition in the feeder loop circuit in this embodiment, and the residual current transformer (ZCT) in this embodiment participates in controlling the on-off of the router (QF), and when the leakage current in the feeder loop circuit in this embodiment exists, the off of the control router (QF) can be controlled.
In order to achieve the above technical effects, the control circuit in the feeder loop circuit of the present embodiment is, as shown in fig. 1, 2 and 3, a circuit breaker (QF) with the output terminals (L11, L12 and L13) and a circuit protection device (PJ) U A End, U B End, U C End, U N And a third fuse (FU 3), a fourth fuse (FU 4) and a fifth fuse (FU 5) are respectively arranged between the ends. The third fuse (FU 3), the fourth fuse (FU 4), and the fifth fuse (FU 5) 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 invention and that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A feeder loop circuit, comprising:
a main circuit;
a circuit breaker (QF) provided 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, N) connected to the input ends of the circuit breakers (QF); the output end of the circuit breaker (QF) is connected with user equipment for feeding; a residual current transformer (ZCT) is sleeved between the output end of the circuit breaker (QF) and the user equipment; u which is also connected to the line protection device (PJ) at the same time as the output terminals (L11, L12, L13) of the circuit breaker (QF) 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:
a control power supply (L1) which takes any one phase of the 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 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 a first normally open contact (QF-1) of the circuit breaker is connected to the inlet end of a first intermediate relay coil (KA 1); the outlet end of the first intermediate relay coil (KA 1) 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 (KA 1-1) of the first intermediate relay; the outgoing line end of the first normally open contact (KA 1-1) 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 (HR 1) is connected with a zero line (N);
the other end of the first Fuse (FU) is connected to the wire inlet end of a first normally open contact (KA 2-1) of the second intermediate relay; the outlet end of the first normally open contact (KA 2-1) 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 other end of the first Fuse (FU) is connected to the wire inlet end of a second normally open contact (QF-2) of the circuit breaker; the outlet end of a second normally open contact (QF-2) of the circuit breaker is connected to the inlet end of a second intermediate relay coil (KA 2); the outlet end of the second intermediate relay coil (KA 2) is connected to a 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 (FU 2) is connected to a power supply of a line protection device (PJ); the outlet end of the line protection device (PJ) is connected to a zero line (N).
4. A feeder loop circuit according to claim 3, characterized IN that the IA, IB, IC, IN terminals on the line protection device (PJ) are connected to the IA, IB, IC terminals of the current transformer (TAU, TAV, TAW), respectively; IA 'end, IB' end and IC 'end on the line protection device (PJ) are short-circuited and then connected with IA' end, IB 'end and IC' end of the current transformer (TAU, TAV, TAW) respectively, and then connected to the ground (PE);
the DIC end on the line protection device (PJ) is respectively connected to the inlet wire end of the second normally open contact (KA 2-2) of the second intermediate relay and the inlet wire end of the travel Switch (SQ); the outlet end of the second normally open contact (KA 2-2) 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 (KA 1-2) of the first intermediate relay; the outlet end of the second normally open contact (KA 1-2) 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. Feeder circuit according to claim 4, characterized in that the line protection device (PJ) is a fire protection line protection device.
6. Feeder circuit according to claim 1, characterized in that said circuit breaker (QF) is an XT series shunt breaker with auxiliary alarm.
7. Feeder circuit according to claim 2, characterized in that 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 a line protection device (PJ) X Terminal and I X 'end'.
8. Feeder circuit according to claim 2, characterized in that at the output (L11, L12, L13) of the circuit breaker (QF) and U of the line protection device (PJ) A End, U B End, U C End, U N And a third fuse (FU 3), a fourth fuse (FU 4) and a fifth fuse (FU 5) are respectively arranged between the ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310023226.2A CN116031875A (en) | 2023-01-09 | 2023-01-09 | Feeder loop circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310023226.2A CN116031875A (en) | 2023-01-09 | 2023-01-09 | Feeder loop circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116031875A true CN116031875A (en) | 2023-04-28 |
Family
ID=86070278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310023226.2A Pending CN116031875A (en) | 2023-01-09 | 2023-01-09 | Feeder loop circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116031875A (en) |
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2023
- 2023-01-09 CN CN202310023226.2A patent/CN116031875A/en active Pending
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