CN210778374U - Isolating switch for low-voltage distribution box and protection device thereof - Google Patents
Isolating switch for low-voltage distribution box and protection device thereof Download PDFInfo
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- CN210778374U CN210778374U CN201922185328.6U CN201922185328U CN210778374U CN 210778374 U CN210778374 U CN 210778374U CN 201922185328 U CN201922185328 U CN 201922185328U CN 210778374 U CN210778374 U CN 210778374U
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- 230000003068 static effect Effects 0.000 claims description 3
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- 230000002265 prevention Effects 0.000 description 2
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Abstract
The utility model relates to an isolator for low voltage distribution box and protection device thereof installs on isolator, isolator and low voltage cable junction, and isolator includes base, plug-in strip and connection terminal, and a protection device for isolator of low voltage distribution box includes: the locking module is arranged on the isolating switch, and locks the movable contact and the fixed contact when the low-voltage cable is electrified; when the low-voltage cable is powered off, the locking module unlocks the movable contact and the fixed contact. The isolating switch locks the switch blade of the isolating switch and the stationary contact through the locking module, so that the switch blade cannot be separated from the stationary contact when the isolating switch is electrified, and the isolating switch can be disconnected after the power is cut off, thereby effectively preventing misoperation of a worker when a power grid is electrified; the temperature sensor detects the temperature of the wire holder, and the controller gives an alarm when the temperature exceeds a set value, so that the isolating switch is prevented from being heated and even burnt, and the reliability of power supply is improved.
Description
Technical Field
The utility model relates to a low voltage distribution field especially relates to an isolator for low voltage distribution box and protection device thereof.
Background
In a low-voltage distribution network, a disconnecting switch is a main element for disconnecting a line, and when a circuit fails, workers need to cut off the power and the disconnecting switch, so that safe troubleshooting and repair are performed.
However, the safety awareness of some workers is usually thin, and the workers are often operated under load, and the isolating switch operated under load can generate electric arcs, so that safety accidents such as casualties are caused.
Secondly, because the contact of isolator belongs to the weak link in the distribution network, overload capacity is poor, and the load is great when easily generating heat, even burns out, influences the reliability of power supply.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a isolator with prevent maloperation and improve power supply reliability for prevent staff's maloperation, thereby generate heat through prevention isolator and burn out the reliability that improves the power supply even.
In order to achieve the above object, the utility model provides a following scheme: the utility model provides a protection device for isolator of low voltage distribution box installs on isolator, isolator and low voltage cable connection, isolator includes base, plug-in strip and connection terminal, the connection terminal is located on the base, the plug-in strip is located on the connection terminal when isolator closes a floodgate, the stationary contact on the base with movable contact on the plug-in strip contacts, protection device for isolator of low voltage distribution box includes: a locking module;
the locking module is arranged on the isolating switch and used for closing and locking the knife switch and the static contact;
when the low-voltage cable is electrified with current, the locking module locks the movable contact and the fixed contact; and when the low-voltage cable is powered off, the locking module unlocks the movable contact and the fixed contact.
Optionally, the locking module specifically includes: an adsorption module and a suction module;
the adsorption module is arranged at the position of the movable contact, the attraction module is arranged at the position of the fixed contact, the adsorption module and the attraction module are arranged oppositely, and the adsorption module and the attraction module attract each other through attraction.
Optionally, the adsorption module is a magnet, and the attraction module is an electromagnet.
Optionally, when the electromagnet is an electromagnetic coil, the attraction module further includes: a primary coil and a secondary coil;
the main coil is connected with a low-voltage cable; the main coil is used for generating a magnetic field through the main current of the low-voltage cable;
the secondary coil is connected with the main coil through the same magnetic medium, the secondary coil is connected with the electromagnetic coil, the secondary coil generates corresponding secondary current according to the magnetic field, and the secondary current is used for enabling the electromagnetic coil to generate the magnetic field and attract the magnet.
Optionally, the method further includes: a temperature sensor and a controller;
the temperature sensor is arranged on the wire holder and is connected with the wire holder; the temperature sensor is used for detecting the temperature of the wire holder;
the controller is connected with the temperature sensor through the base, and the controller is used for giving an alarm according to temperature information detected by the temperature sensor.
Optionally, the model of the temperature sensor is DS18B 20.
Optionally, the controller is a comparator, and the comparator is configured to compare the temperature value detected by the temperature sensor with a set value and alarm when the temperature value is greater than the set value.
Optionally, the protection device for the disconnector of a low-voltage distribution box further comprises: the aviation plug is arranged on the base and used for being connected with the low-voltage cable.
In order to achieve the above purpose, the utility model also discloses following technical scheme:
a disconnecting switch comprises the protection device for the disconnecting switch of the low-voltage distribution box, and the disconnecting switch is used for connecting and disconnecting a current circuit.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the isolating switch locks the switch blade of the isolating switch and the stationary contact through the locking module, so that the switch blade cannot be separated from the stationary contact when the isolating switch is electrified, and the isolating switch can be disconnected after the power is cut off, thereby effectively preventing misoperation of a worker when a power grid is electrified; the temperature sensor detects the temperature of the wire holder, and the controller gives an alarm when the temperature exceeds a set value, so that the isolating switch is prevented from being heated and even burnt, and the reliability of power supply is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a front view of the structure provided by the present invention;
FIG. 2 is a side view of the structure provided by the present invention;
description of the symbols: the circuit breaker comprises an isolating switch 1, a switch blade 2, a movable contact 3, a fixed contact 4, a temperature sensor 5, an electromagnetic coil 6, an aviation plug 7, a base 8, a wire holder 9 and an adsorption module 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a isolator with prevent maloperation and improve power supply reliability for prevent staff's maloperation, thereby generate heat through prevention isolator and burn out even and improve the reliability of power supply.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The utility model provides a protection device for isolator of low voltage distribution box installs on isolator, isolator 1 and low tension cable are connected, isolator 1 includes base 8, plug-in strip 2 and connection terminal 9, connection terminal 9 locates on the base 8, plug-in strip 2 locates on the connection terminal 9 when isolator 1 closes a floodgate, stationary contact 4 on the base 8 with movable contact 3 on the plug-in strip 2 contacts, a protection device for isolator of low voltage distribution box includes: a locking module;
the locking module is arranged on the isolating switch 1 and used for closing and locking the knife switch 2 and the static contact 4;
when the low-voltage cable is electrified with current, the locking module locks the movable contact 3 and the fixed contact 4; when the low-voltage cable is powered off, the locking module unlocks the movable contact 3 and the fixed contact 4.
In practical application, the locking module specifically comprises: an adsorption module 10 and a suction module;
the adsorption module 10 is arranged at the position of the movable contact 3, the attraction module is arranged at the position of the fixed contact 4, the adsorption module 10 and the attraction module are arranged oppositely, and the adsorption module 10 and the attraction module are attracted to each other through attraction.
In practical application, the adsorption module 10 is a magnet, and the attraction module is an electromagnet.
In practical applications, when the electromagnet is the electromagnetic coil 6, the attraction module further includes: a primary coil and a secondary coil;
the main coil is connected with a low-voltage cable; the main coil is used for generating a magnetic field through the main current of the low-voltage cable;
the secondary coil is connected with the main coil through the same magnetic medium, the secondary coil is connected with the electromagnetic coil 6, the secondary coil generates corresponding secondary current according to the magnetic field, and the secondary current is used for enabling the electromagnetic coil 6 to generate the magnetic field and attract the magnet.
In practical application, the method further comprises the following steps: a temperature sensor 5 and a controller;
the temperature sensor 5 is arranged on the wire holder 9 and is connected with the wire holder 9; the temperature sensor 5 is used for detecting the temperature of the wire holder 9;
the controller is connected with the temperature sensor 5 through the base 8, and the controller is used for giving an alarm according to temperature information detected by the temperature sensor 5.
In practical application, the model of the temperature sensor 5 is DS18B 20.
In practical application, the controller is a comparator, and the comparator is used for comparing a temperature value detected by the temperature sensor 5 with a set value and giving an alarm when the temperature value is greater than the set value.
In practical application, the protection device for the disconnector of the low-voltage distribution box further comprises: the aviation plug 7, the aviation plug 7 is located on the base 8, the aviation plug 7 is used for connecting the low voltage cable.
The utility model discloses a protection device working process for low voltage distribution box's isolator as follows:
when the low-voltage power grid is electrified, the current of the low-voltage cable is electrified to generate a first magnetic field, the secondary coil is acted by the first magnetic field to generate induction current, the electromagnetic coil 6 is connected with the secondary coil and is acted by the induction current to generate a second magnetic field, the magnet is acted by the second magnetic field to be locked with the electromagnetic coil 6, so that the movable contact 3 and the fixed contact 4 are locked, the switch knife 2 and the fixed contact 4 are further locked, the fact that a worker cannot perform switching-off operation when the low-voltage power grid is electrified is achieved, and the effect of preventing misoperation is achieved.
When the low-voltage power grid is powered off, no current flows through the low-voltage cable, no current flows through the main coil, no current flows through the secondary coil, and no current flows through the electromagnetic coil 6, so that the electromagnetic coil 6 cannot generate a magnetic field, and the magnetic field has no adsorption effect on the magnet, so that the movable contact 3 and the fixed contact 4 are unlocked, and a worker can realize the switching-off operation.
In addition, voltage still passes through in the low-voltage power grid, but when there is not load current in the low-voltage cable that isolator 1 belongs to, also there is not current in the secondary coil to pass through, solenoid 6 also just can not produce magnetic field, also does not have the adsorption effect to the magnet, and the staff is to the breaking operation of isolator 1 this moment can not produce the incident.
The temperature sensor 5 detects the temperature of the wire holder 9 in real time and sends the detected temperature value to the controller; when the temperature value exceeds a set value, the controller gives an alarm to remind a worker that the isolating switch 1 is abnormal.
In order to achieve the above purpose, the utility model also discloses following technical scheme:
a disconnecting switch for a low-voltage distribution box comprises the protecting device for the disconnecting switch for the low-voltage distribution box, wherein the disconnecting switch 1 is used for connecting and disconnecting a current circuit.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. The utility model provides a protection device for isolator of low voltage distribution box installs on isolator, isolator and low voltage cable junction, isolator includes base, plug-in strip and connection terminal, the connection terminal is located on the base, the plug-in strip is located on the connection terminal when isolator closes a floodgate, the stationary contact on the base with movable contact on the plug-in strip contacts, its characterized in that, a protection device for isolator of low voltage distribution box includes: a locking module;
the locking module is arranged on the isolating switch and used for closing and locking the knife switch and the static contact;
when the low-voltage cable is electrified with current, the locking module locks the movable contact and the fixed contact; and when the low-voltage cable is powered off, the locking module unlocks the movable contact and the fixed contact.
2. The protection device for disconnectors for low-voltage switchgears according to claim 1, characterized in that said locking module comprises in particular: an adsorption module and a suction module;
the adsorption module is arranged at the position of the movable contact, the attraction module is arranged at the position of the fixed contact, the adsorption module and the attraction module are arranged oppositely, and the adsorption module and the attraction module attract each other through attraction.
3. The protection device for the disconnector of low-voltage distribution boxes according to claim 2, characterized in that said adsorption module is a magnet and said attraction module is an electromagnet.
4. The protection device for disconnectors for low-voltage switchgears according to claim 3, characterized in that when said electromagnet is an electromagnetic coil, said attraction module further comprises: a primary coil and a secondary coil;
the main coil is connected with a low-voltage cable; the main coil is used for generating a magnetic field through the main current of the low-voltage cable;
the secondary coil is connected with the main coil through the same magnetic medium, the secondary coil is connected with the electromagnetic coil, the secondary coil generates corresponding secondary current according to the magnetic field, and the secondary current is used for enabling the electromagnetic coil to generate the magnetic field and attract the magnet.
5. The protection device for disconnectors for low-voltage switchgears according to claim 1, characterized in that it further comprises: a temperature sensor and a controller;
the temperature sensor is arranged on the wire holder and is connected with the wire holder; the temperature sensor is used for detecting the temperature of the wire holder;
the controller is connected with the temperature sensor through the base, and the controller is used for giving an alarm according to temperature information detected by the temperature sensor.
6. The protection device for disconnectors for low-voltage switchgears according to claim 5, characterized in that said temperature sensor has the type DS18B 20.
7. The protection device for disconnectors for low-voltage switchgears according to claim 5, characterized in that said controller is a comparator for comparing the temperature value detected by the temperature sensor with a set value and for alarming when said temperature value is greater than said set value.
8. The protection device for disconnectors for low-voltage switchgears according to claim 1, characterized in that it further comprises: the aviation plug is arranged on the base and used for being connected with the low-voltage cable.
9. A disconnector, characterized in that it comprises a protection device for disconnectors for low-voltage switchgears, according to any of claims 1 to 8, for making and breaking a current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922185328.6U CN210778374U (en) | 2019-12-09 | 2019-12-09 | Isolating switch for low-voltage distribution box and protection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922185328.6U CN210778374U (en) | 2019-12-09 | 2019-12-09 | Isolating switch for low-voltage distribution box and protection device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210778374U true CN210778374U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922185328.6U Active CN210778374U (en) | 2019-12-09 | 2019-12-09 | Isolating switch for low-voltage distribution box and protection device thereof |
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| CN (1) | CN210778374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022052618A1 (en) * | 2020-09-08 | 2022-03-17 | 比亚迪股份有限公司 | Service switch, control method for service switch, and electric vehicle |
-
2019
- 2019-12-09 CN CN201922185328.6U patent/CN210778374U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022052618A1 (en) * | 2020-09-08 | 2022-03-17 | 比亚迪股份有限公司 | Service switch, control method for service switch, and electric vehicle |
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