CN211744045U - Multi-place start-stop control device - Google Patents
Multi-place start-stop control device Download PDFInfo
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- CN211744045U CN211744045U CN202020075439.1U CN202020075439U CN211744045U CN 211744045 U CN211744045 U CN 211744045U CN 202020075439 U CN202020075439 U CN 202020075439U CN 211744045 U CN211744045 U CN 211744045U
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- control device
- alternating current
- power supply
- local control
- contactor
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Abstract
The application relates to a multi-place start-stop control device, which consists of a local control device and more than one remote control device, wherein the local control device is formed by connecting a switching electric appliance and a contactor in series, the remote control device is connected into the local control device through a switching power supply and an alternating current breaker, the switching electric appliance of the local control device comprises a local control device stop button and a local control device start button which are connected in series, the local control device start button is used for controlling the work of the contactor, and a direct current intermediate relay group is used for controlling the work of the remote control device.
Description
Technical Field
The application relates to a multi-place start-stop control device which is mainly suitable for multi-place control and design of a low-voltage apparatus.
Background
The control of a fan, illumination and an installation assembly line has two or more control requirements, the currently adopted control method is to realize multi-site control through a contactor alternating current 220V auxiliary contact, and the method has the following defects:
the capacitance between the wires of the long-distance control circuit causes that the contactor cannot be reliably disconnected;
the voltage drop of the control line at a long distance causes that the contactor can not be reliably closed and opened;
when the alternating current 220V control circuit is applied to outdoor places, humid places and other places, electric shock is caused, and the protection is lacked;
the power box can not remove remote control, and brings danger for maintenance.
Disclosure of Invention
The technical problem solved by the application is to overcome the defects in the prior art, and provide a multi-place start-stop control device which is simple in structure, convenient to use and good in effect, and a direct current control circuit is adopted, so that the problem that the control circuit cannot be reliably disconnected due to capacitance between wires is avoided, and the reliability of the control circuit is improved; safety is improved by adopting safe ultra-low voltage; the sectional area of the control cable is reasonably selected to meet the requirements of different control distances; the power supply box can remove remote and allopatric control so as to improve the safety of overhaul and maintenance personnel.
The technical scheme adopted by the application for solving the technical problems comprises the following steps: a multi-place start-stop control device comprises an on-site control device and more than one off-site control device, wherein the on-site control device is electrically connected with an alternating current power supply of a power distribution network, and electric equipment is electrically connected with the on-site control device; the remote control device is connected with the local control device through a control cable, the control cable is not less than three cores, and the remote control device is characterized in that the local control device is formed by connecting a switching device and a contactor in series, the remote control device is connected into the local control device through a switching power supply and an alternating current breaker, the switching device of the local control device comprises a local control device stop button and a local control device start button which are connected in series, the local control device start button is used for controlling the contactor to work, a direct current intermediate relay group is used for controlling (realizing) the remote control device to work, and the sectional area of the control cable meets the following formula:
alternating current power supply adopts single phase alternating current power supply, single phase alternating current power supply one end is passed through fuse and control device stop button one end on the spot, exchange auxiliary relay normally open contact one end, alternating current circuit breaker one end is connected, the control device stop button other end on the spot and control device start button one end on the spot, alternating current contactor normally open contact one end is connected, the control device start button other end on the spot, the alternating current contactor normally open contact other end and direct current auxiliary relay normally closed contact group link, direct current auxiliary relay normally closed contact group is connected to the single phase alternating current power supply other end through the contactor coil, the alternating current circuit breaker other end connects switching power supply alternating current side one end, the single phase alternating current power supply other end.
Compared with the prior art, the application has the following advantages and effects: the structure is simple, the use is convenient, the direct current control circuit is adopted, the problem that the direct current control circuit cannot be reliably disconnected due to capacitance between wires is avoided, and the reliability of the control circuit is improved; safety is improved by adopting safe ultra-low voltage; the sectional area of the control cable is reasonably selected to meet the requirements of different control distances; the local control device can remove remote and allopatric control so as to improve the safety of overhaul and maintenance personnel.
Drawings
FIG. 1 is a schematic diagram of one-time wiring (control principle) of the embodiment of the present application;
FIG. 2 is a schematic diagram of secondary wiring according to an embodiment of the present application;
FIG. 3 is a schematic wiring diagram of a remote control device according to an embodiment of the present application;
FIG. 4 is a schematic diagram of secondary wiring of the remote control device according to the embodiment of the present application;
FIG. 5 is a diagram of the normally open contacts of the DC intermediate relay set of the remote control unit of FIG. 3;
fig. 6 is a diagram of the normally closed contact connections of the dc intermediate relay set of the remote control unit of fig. 3.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples.
As shown in fig. 1, the multi-site start-stop control device comprises a local control device and a plurality of remote control devices, wherein n represents the number of the remote control devices, and n is greater than or equal to 1. The local control device is connected to a power distribution network AC power supply through a conductor, wherein the AC power supply AC includes but is not limited to 220V, 380V and 660V; the electric equipment SB is connected to the local control device through a conductor; the conductors comprise power cables, bus ducts, bare buses and the like. The remote control device is connected with the local control device through a control cable, the control cable is not less than 3 cores, and the sectional area of the control cable meets the following formula:
as shown in fig. 2, the electric equipment SB is connected to the ac power supply through the MCCB and QAC. The MCCB adopts a breaker or an isolating switch and a fuse and other switching appliances with isolating and protecting functions, and the QAC adopts a contactor. The MCCB and the QAC are installed in a local control device.
As shown in fig. 3, the secondary line power is connected to a single phase ac power source (L, N). FA in the figure is a fuse; QAC is contactor coil; d is a signal lamp; SC is a stop button arranged on the local control device; SO is a start button arranged on the local control device; KZ1 is a coil and a normally open contact of an alternating current intermediate relay; KOI (KO 1 … KOn) is a normally open contact of a direct current intermediate relay group (n is a positive integer more than 1, the same applies below); KCI (KC 1 … KCn) is a normally closed contact of the direct current intermediate relay group; the MCB is an alternating current breaker, and the alternating current side of the switch power supply KC is connected to a secondary line through the MCB.
The DC voltage of a direct current power supply output by a switching power supply KC is not more than 120V, the output voltage adjustment range is +/-10%, the output current range is 0-5A, the working temperature is-20-70 ℃, the temperature coefficient is +/-0.02%, and an electric device SB is connected to a local control device.
As shown in fig. 4, SOI (SO 1 … SOn) is a group of start buttons of n individual control modules mounted on a remote control; SCI (SC 1 … SCn) is a stop button group of n individual control modules mounted on the remote control device, respectively; wherein SO1 and SC1 are installed in a first remote control device, and SOn and SCn are installed in a first remote control device; KO1 … KOn and KC1 … KCn are direct current intermediate relays, and all the direct current intermediate relays are installed in the local control device. The remote control device is connected to the DC output terminal of the switching power supply KC of the local control device through a control cable.
Fig. 3 and 4 are schematic diagrams of the remote control device, a wiring diagram of the normally open contact KOI of the direct current intermediate relay group of the remote control device in fig. 3 is shown in fig. 5, and a wiring diagram of the normally closed contact KCI of the direct current intermediate relay group of the remote control device is shown in fig. 6. In fig. 5 and 6, n is the same as that shown in fig. 1, and is the number of remote control devices.
All simple variations and combinations of the technical features and technical solutions of the present application are considered to fall within the scope of the present application.
Claims (3)
1. A multi-place start-stop control device comprises an on-site control device and more than one off-site control device, wherein the on-site control device is electrically connected with an alternating current power supply of a power distribution network, and electric equipment is electrically connected with the on-site control device; the remote control device is connected with the local control device through a control cable, and the control cable is not less than three cores, which is characterized in that: the local control device is formed by connecting a switching electric appliance and a contactor in series, the remote control device is connected to the local control device through a switching power supply and an alternating current breaker, the switching electric appliance of the local control device comprises a local control device stop button and a local control device start button which are connected in series, the local control device start button is used for controlling the contactor to work, and the direct current intermediate relay group is used for controlling the remote control device to work.
2. The multi-site start-stop control device according to claim 1, wherein: alternating current power supply adopts single phase alternating current power supply, single phase alternating current power supply one end is passed through fuse and control device stop button one end on the spot, exchange auxiliary relay normally open contact one end, alternating current circuit breaker one end is connected, the control device stop button other end on the spot and control device start button one end on the spot, alternating current contactor normally open contact one end is connected, the control device start button other end on the spot, the alternating current contactor normally open contact other end and direct current auxiliary relay normally closed contact group link, direct current auxiliary relay normally closed contact group is connected to the single phase alternating current power supply other end through the contactor coil, the alternating current circuit breaker other end connects switching power supply alternating current side one end, the single phase alternating current power supply other end.
3. A multi-site start-stop control device according to claim 1 or 2, characterized in that: controlling the cross-sectional area of the cable
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020075439.1U CN211744045U (en) | 2020-01-14 | 2020-01-14 | Multi-place start-stop control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020075439.1U CN211744045U (en) | 2020-01-14 | 2020-01-14 | Multi-place start-stop control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211744045U true CN211744045U (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020075439.1U Active CN211744045U (en) | 2020-01-14 | 2020-01-14 | Multi-place start-stop control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211744045U (en) |
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2020
- 2020-01-14 CN CN202020075439.1U patent/CN211744045U/en active Active
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