CN219576637U - Multi-protection control system for urban rail distribution box and distribution box - Google Patents
Multi-protection control system for urban rail distribution box and distribution box Download PDFInfo
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- CN219576637U CN219576637U CN202223385050.5U CN202223385050U CN219576637U CN 219576637 U CN219576637 U CN 219576637U CN 202223385050 U CN202223385050 U CN 202223385050U CN 219576637 U CN219576637 U CN 219576637U
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Abstract
The utility model belongs to the technical field of power supply and distribution, and particularly relates to a multiple protection control system for a urban rail distribution box and the distribution box, wherein the multiple protection control system comprises: the primary loop comprises a three-phase circuit, and normally open main contacts of fuses and contactors are arranged on each phase of circuit in series; and the secondary circuit is connected with any phase of circuit, the micro-contacts of the fuses are arranged in series, and the micro-contacts are communicated with the coil of the contactor through a starting button and a first auxiliary normally-open contact of the contactor which are arranged in parallel. The utility model adopts various devices with control and protection functions, effectively avoids damaging parts at the moment of high-voltage power-on, and has higher safety protection coefficient.
Description
Technical Field
The utility model belongs to the technical field of power supply and distribution, and particularly relates to a multiple protection control system for a urban rail distribution box and the distribution box.
Background
The power supply and distribution system belongs to the tail end of the whole power industry, and the daily life or industrial production is closely related to the power supply and distribution system, so that the coverage area is very wide. In recent years, the demand for electric power is rapidly rising, and thus, there is also a higher demand for the safe and reliable performance of power supply and distribution systems. Because the distribution box has the characteristics of small volume, high space utilization rate, environmental protection effect, simple and convenient installation, unique configuration function and stable and reliable operation, the distribution box is widely applied to urban rail power supply and distribution systems.
At present, a power switch and a safety device are generally arranged in the distribution box, and switching equipment, a measuring instrument, protection electrical appliances and auxiliary equipment are assembled in a closed or semi-closed box according to the requirements of electrical wiring to form the low-voltage distribution box. However, the safety coefficient of the power supply and distribution system is low, when a certain device with a protection function fails or fails, the protection function of a circuit is realized by only a single protection electric appliance, and the system cannot timely cut off the circuit or alarm by other protection electric appliances, so that the overall safety coefficient of the distribution box is low.
Disclosure of Invention
Aiming at the technical problems in the background art, the utility model provides a multiple protection control system for a urban rail distribution box and the distribution box.
In order to solve the technical problems, the utility model provides a multiple protection control system for a urban rail distribution box, comprising:
the primary loop comprises a three-phase circuit, and normally open main contacts of fuses and contactors are arranged on each phase of circuit in series;
and the secondary circuit is connected with any phase of circuit, the micro-contacts of the fuses are arranged in series, and the micro-contacts are communicated with the coil of the contactor through a starting button and a first auxiliary normally-open contact of the contactor which are arranged in parallel.
Further, an air switch is further arranged on the phase circuit in the secondary circuit, and the air switch is arranged in series with the micro-contacts of the fuses.
Further, the secondary circuit is also provided with a warning lamp, and the warning lamp is controlled by a second auxiliary normally open contact of the contactor;
when the starting button is pressed down, the coil is electrified, the second auxiliary normally open contact is closed, and the warning lamp is electrified.
Further, the secondary circuit is further provided with a stop button, and the stop button is arranged in series with the micro-contacts of each fuse.
Further, a shielding wire is adopted to connect the phase line and the zero line in the secondary loop.
In yet another aspect, the present utility model further provides an electrical box comprising the multiple protection control system, and a library charging receptacle connected to the first auxiliary normally open contact of the contactor and the plug of the coil side connector.
The multi-protection control system for the urban rail distribution box and the distribution box have the beneficial effects that the multi-protection control system for the urban rail distribution box and the distribution box specifically adopt various devices with control and protection functions, so that the damage to components in the moment of high-voltage electrification is effectively avoided, and the multi-protection control system has a high safety protection coefficient.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a multi-protection control system for a urban rail distribution box according to the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment provides a multiple protection control system for urban rail distribution box, which is specifically divided into a primary loop and a secondary loop, wherein three fuses (FU 1, FU2 and FU 3) with micro-contacts are adopted to protect a main circuit, once a short circuit fault occurs on the side of the circuit, load current exceeds rated current of the fuses (FU 1, FU2 and FU 3) and instantaneous heavy current generated when the circuit is started or a power supply is unstable, the fuses (FU 1, FU2 and FU 3) are fused, and meanwhile, the micro-contacts of the secondary loop are linked, the contacts are disconnected, and the circuit is cut off in time to protect.
The fuse in this embodiment may be, but is not limited to, an NH-type full range low voltage high resolution blade contact fuse employing medium melting electricity.
Specifically, the secondary circuit is automatically disconnected through an air switch F1001 at first when the current in the circuit exceeds the rated current, and after the coil of the contactor KM1 is powered off, the normally open main contact connected to the main circuit is disconnected at the moment, so that the circuit on the secondary side is protected, and the primary circuit is protected.
The contactor KM1 is required to work cooperatively in normal operation of the distribution box, and a circuit can be switched on or off through a button switch on a cabinet door of the box body, so that a coil of the contactor KM1 is electrified or de-electrified, and a normally open contact and a normally closed contact of the contactor are closed to effectively control the on and off of the circuit. The multiple protection of the distribution box is realized through the joint response of various protection electric appliances and the control of an external switch, and the safety and reliability of the power supply and distribution system are greatly improved.
As shown in fig. 1, the specific circuit of the multi-protection control system for the urban rail distribution box comprises: a primary circuit including a three-phase circuit, and normally open main contacts of fuses (FU 1, FU2, FU 3) and a contactor KM1 each of which is provided in series on each phase circuit; the secondary circuit is connected with any phase circuit, the micro-contacts of the fuses (FU 1, FU2 and FU 3) are arranged in series, and the micro-contacts are communicated with the coil of the contactor KM1 through a starting button SB2 and a first auxiliary normally open contact of the contactor KM1 which are arranged in parallel.
In this embodiment, an air switch F1001 is further provided on the phase circuit in the secondary circuit, and the air switch is disposed in series with the micro-contacts of the fuses (FU 1, FU2, FU 3).
In this embodiment, the secondary circuit is further provided with a warning lamp, and the warning lamp is controlled by a second auxiliary normally open contact of the contactor KM 1; when the starting button SB2 is pressed, the coil is electrified, the second auxiliary normally open contact is closed, and the warning lamp is electrified.
In this embodiment, the secondary circuit is further provided with a stop button SB1, which is provided in series with the micro-contacts of the respective fuses (FU 1, FU2, FU 3).
And the phase line and the zero line in the secondary loop are connected by adopting a shielding line.
The embodiment also provides a distribution box, which comprises the multi-protection control system and a storage charging socket, wherein the storage charging socket is connected with an auxiliary contact of the starting button SB 2.
The main circuit adopts three fuses (FU 1, FU2 and FU 3) with larger rated current to be connected in parallel, overcurrent protection is carried out when the circuit is in short circuit, and the fuses of the fuses (FU 1, FU2 and FU 3) are quickly fused before the equipment is not damaged, so that the circuit is cut off in time, and electric equipment is protected from being damaged. The normally open main contact of the contactor KM1 is connected with the fuse wire of the fuse (FU 1, FU2 and FU 3) in series, the heavy current load of the primary loop is controlled by the small current of the secondary loop, the control can be performed by starting and stopping button switches on the power distribution box door, and the self-locking can be performed, so that the protection circuit is simple and reliable.
Meanwhile, the button switch is also provided with an auxiliary contact connected with the storage charging socket, so that the power supply can be started after the storage charging socket is reliably connected. The block terminal is in normal operating process, and yellow scintillation warning light on the box cabinet door is in normal bright state, plays the warning effect of notice safety. Through the reliable contact of socket is filled to storehouse, makes the coil end of contactor KM1 get electric, and normally open main contact actuation in the primary loop, main circuit is put through, presses the operation button switch on the block terminal cabinet door, and normally open auxiliary contact in the secondary loop is the circuit auto-lock, even from the operation button switch that resets back that resets, button switch also always lights the green light, until the socket is filled to the storehouse contactless, the coil of contactor KM1 loses power, and auxiliary contact disconnection back, button switch's green light just can go out.
This city rail multiple protection control system for block terminal passes through air switch and takes micro-gap contact's fuse (FU 1, FU2, FU 3), has realized the inside double protection of box, and on the one hand is the cutting protection of major loop, and this is guaranteed by three fuse (FU 1, FU2, FU 3), and micro-gap contact also can break off simultaneously and cut off control circuit, and on the other hand is in time break off control circuit by air switch, has guaranteed the safety of block terminal internal circuit. And the external control of the button switch and the contactor KM1 outside the distribution box realizes the on-off control of a circuit through remote operation, and meanwhile, the button switch also has an auxiliary contact connected with a storage charging socket, so that the power supply can be started after the storage charging socket is reliably connected, and the operation and the control are convenient. And the main circuit of the multiple protection control system adopts three-phase alternating current for distribution, the control circuit takes one phase of the three-phase power, and a zero line is introduced as a power supply to serve as the power supply input of the contactor KM1, so that the use of the power supply of the contactor KM1 is omitted, and the cost is greatly saved.
The components selected in the utility model are all general standard components or components known to the person skilled in the art, and the structures and principles of the components are all known to the person skilled in the art through technical manuals or through routine experimental methods.
In the description of embodiments of the present utility model, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, electrical, unless explicitly stated or limited otherwise; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (5)
1. A multiple protection control system for a urban rail distribution box, comprising:
the primary loop comprises a three-phase circuit, and normally open main contacts of fuses and contactors are arranged on each phase of circuit in series;
the secondary circuit is connected with any phase of circuit, the micro-contacts of the fuses are arranged in series, and the micro-contacts are communicated with the coil of the contactor through a starting button and a first auxiliary normally-open contact of the contactor which are arranged in parallel;
and an air switch is also arranged on the phase circuit in the secondary circuit, and the air switch is connected with the micro-contacts of the fuses in series.
2. The multiple protection control system of claim 1, wherein,
the secondary circuit is also provided with a warning lamp, and the warning lamp is controlled by a second auxiliary normally open contact of the contactor;
when the starting button is pressed down, the coil is electrified, the second auxiliary normally open contact is closed, and the warning lamp is electrified.
3. The multiple protection control system of claim 1, wherein,
the secondary circuit is also provided with a stop button which is connected with the micro-contacts of the fuses in series.
4. The multiple protection control system of claim 1, wherein,
and the phase line and the zero line in the secondary loop are connected by adopting a shielding line.
5. A power distribution box comprising a multiple protection control system as claimed in any one of claims 1 to 4, and
and the storage charging socket is connected with the first auxiliary normally-open contact of the contactor and the plug of the coil side connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223385050.5U CN219576637U (en) | 2022-12-16 | 2022-12-16 | Multi-protection control system for urban rail distribution box and distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223385050.5U CN219576637U (en) | 2022-12-16 | 2022-12-16 | Multi-protection control system for urban rail distribution box and distribution box |
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| CN219576637U true CN219576637U (en) | 2023-08-22 |
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| CN202223385050.5U Active CN219576637U (en) | 2022-12-16 | 2022-12-16 | Multi-protection control system for urban rail distribution box and distribution box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116890603A (en) * | 2023-09-11 | 2023-10-17 | 新誉集团有限公司 | Failure detection method and system for contactor of air conditioner blower |
| CN117791564A (en) * | 2023-12-05 | 2024-03-29 | 威胜能源技术股份有限公司 | A safe operation circuit for energy storage box transformer and its control method |
-
2022
- 2022-12-16 CN CN202223385050.5U patent/CN219576637U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116890603A (en) * | 2023-09-11 | 2023-10-17 | 新誉集团有限公司 | Failure detection method and system for contactor of air conditioner blower |
| CN116890603B (en) * | 2023-09-11 | 2023-12-12 | 新誉集团有限公司 | Failure detection method and system for contactor of air conditioner blower |
| CN117791564A (en) * | 2023-12-05 | 2024-03-29 | 威胜能源技术股份有限公司 | A safe operation circuit for energy storage box transformer and its control method |
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