CN209707565U - A kind of automatic breaking device of ammeter high current overheat - Google Patents
A kind of automatic breaking device of ammeter high current overheat Download PDFInfo
- Publication number
- CN209707565U CN209707565U CN201920391710.XU CN201920391710U CN209707565U CN 209707565 U CN209707565 U CN 209707565U CN 201920391710 U CN201920391710 U CN 201920391710U CN 209707565 U CN209707565 U CN 209707565U
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- actuator
- ammeter
- reset switch
- induction coil
- attached
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Abstract
The utility model embodiment discloses a kind of ammeter high current and overheats automatic breaking device, for solve it is existing lack based on ammeter connection line temperature build and cut-off device the technical issues of.The utility model embodiment includes closure induction coil, the connecting terminal for the reset switch of closing or opening circuit and for being attached with firewire being connected on route；Closure induction coil is connected with thermistor and actuator, and thermistor is attached with actuator, and actuator is attached with reset switch.In the present embodiment, after firewire is even connected with connecting terminal, reset switch is pressed, since alternating current can generate magnetic field, when ammeter works normally, closure induction coil passes through due to changing magnetic field, can generate inductive voltage and current.When the temperature of electric wire is gradually increasing, the resistance value of thermistor is gradually reduced, and after reaching the critical value of setting, induction coil electric current reaches the electric current of actuator work, and actuator triggers reset switch tripping, disconnecting circuit.
Description
Technical field
The utility model relates to transmission line of electricity relevant apparatus research and development technology field more particularly to ammeter high current overheat are automatic
Breaking device.
Background technique
In metering O&M real process, due to ammeter wiring loosening or user's overload electricity consumption, cause electric wire fever tight
Weight or Wiring port have spark to flash, if cannot power off in time, will lead on fire when serious, usually therefore cause an electricity
Table is burnt with more ammeters of case.Power supply enterprise or user's loss of assets are seriously affected, or causes security risk.
Due to existing ammeter or external device, the air switch of only short-circuit trip avoidance function is a, this kind of air switch
Working principle be by setting current, when transient current be more than setting valve when cut-off rapidly.But current market lacks a kind of length
The breaking device of phase high current overload can not cope with situation on fire caused by ammeter region overheats.
Therefore, in order to solve the above technical problems, finding a kind of automatic breaking device of ammeter high current overheat becomes ability
The important topic that field technique personnel are studied.
Utility model content
The utility model embodiment discloses a kind of automatic breaking device of ammeter high current overheat, for solving existing shortage
The technical issues of based on the device cut-off with ammeter connection line temperature build.
The utility model embodiment provides a kind of automatic breaking device of ammeter high current overheat, including is connected on route
Closure induction coil, the connecting terminal for the reset switch of closing or opening circuit and for being attached with firewire；
The closure induction coil is connected with thermistor and actuator, and the thermistor is connected with the actuator
It connects, the actuator is attached with the reset switch.
Optionally, the actuator is electromagnet.
Optionally, the actuator is motor.
Optionally, the connecting terminal includes two.
As can be seen from the above technical solutions, the utility model embodiment has the advantage that
In the present embodiment, after firewire is even connected with connecting terminal, reset switch is pressed, since alternating current can generate magnetic field,
When ammeter works normally, closure induction coil passes through due to changing magnetic field, can generate inductive voltage and current.When the temperature of electric wire
Degree is gradually increasing, and the resistance value of thermistor is gradually reduced, and after reaching the critical value of setting, induction coil electric current reaches actuator
The electric current of work, actuator trigger reset switch tripping, disconnecting circuit.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural representation that a kind of ammeter high current provided in the utility model embodiment overheats automatic breaking device
Figure；
Fig. 2 is the closure sense that a kind of ammeter high current for providing overheats in automatic breaking device in the utility model embodiment
Answer the structural schematic diagram of coil；
It illustrates: reset switch 1；It is closed induction coil 2；Connecting terminal 3；Firewire 4；Zero curve 5；Actuator 6；Temperature-sensitive electricity
Resistance 7.
Specific embodiment
The utility model embodiment discloses a kind of automatic breaking device of ammeter high current overheat, for solving existing shortage
The technical issues of based on the device cut-off with ammeter connection line temperature build.
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and specific implementation
The utility model is described in further detail for mode.Obviously, described embodiment is only the utility model a part
Embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, fall within the protection scope of the utility model.
Embodiment one
Fig. 1 and Fig. 2 are please referred to, a kind of ammeter high current provided in the present embodiment overheats automatic breaking device and includes:
Be connected on route closure induction coil 2, for closing or opening circuit reset switch 1 and be used for and fire
The connecting terminal 3 that line 4 is attached；
Closure induction coil 2 is connected with thermistor 7 and actuator 6, and thermistor 7 is attached with actuator 6, driving
Part 6 is attached with reset switch 1.
Further, actuator 6 is electromagnet.
Further, actuator 6 is motor.
Further, connecting terminal 3 includes two.
It should be noted that firewire 4 sequentially passes through two above-mentioned connecting terminals 3.
In the present embodiment, after firewire 4 accesses connecting terminal 3, reset switch 1 is pressed.After firewire 4 is connected to, due to alternating current
Magnetic field can be generated, when ammeter works normally, closure induction coil 2 passes through due to changing magnetic field, can generate induced voltage and electricity
Stream.When the temperature of electric wire is gradually increasing, 7 resistance value of thermistor is gradually reduced, after reaching the critical value of setting, induction coil electricity
Stream reaches motor/work of electromagnet electric current, and triggering reset switch 1 trips, disconnecting circuit.
Since wire insulation skin has part using flame retardant type rubber plastic, meter case is also plastic material, and burning point is higher than
100 degrees Celsius, this programme will not be malfunctioned within the scope of due to natural air temperature normal variation, can normally judge overcurrent
Whether the accumulation temperature of generation is more than normal value and is cut-off.
A kind of automatic breaking device of ammeter high current overheat provided by the utility model is described in detail above,
For those of ordinary skill in the art, based on the idea of the embodiment of the present invention, in specific embodiment and application range
Upper there will be changes, and to sum up, the content of the present specification should not be construed as a limitation of the present invention.
Claims (4)
1. a kind of ammeter high current overheats automatic breaking device, which is characterized in that including the closure line of induction being connected on route
Circle, the connecting terminal for the reset switch of closing or opening circuit and for being attached with firewire；
The closure induction coil is connected with thermistor and actuator, and the thermistor is attached with the actuator,
The actuator is attached with the reset switch.
2. ammeter high current according to claim 1 overheats automatic breaking device, which is characterized in that the actuator is electricity
Magnet.
3. ammeter high current according to claim 1 overheats automatic breaking device, which is characterized in that the actuator is electricity
Machine.
4. ammeter high current according to claim 1 overheats automatic breaking device, which is characterized in that the terminals attached bag
Include two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391710.XU CN209707565U (en) | 2019-03-26 | 2019-03-26 | A kind of automatic breaking device of ammeter high current overheat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920391710.XU CN209707565U (en) | 2019-03-26 | 2019-03-26 | A kind of automatic breaking device of ammeter high current overheat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209707565U true CN209707565U (en) | 2019-11-29 |
Family
ID=68647727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920391710.XU Expired - Fee Related CN209707565U (en) | 2019-03-26 | 2019-03-26 | A kind of automatic breaking device of ammeter high current overheat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209707565U (en) |
-
2019
- 2019-03-26 CN CN201920391710.XU patent/CN209707565U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |