CN2781619Y - Overcurrent protector - Google Patents
Overcurrent protector Download PDFInfo
- Publication number
- CN2781619Y CN2781619Y CN 200420012826 CN200420012826U CN2781619Y CN 2781619 Y CN2781619 Y CN 2781619Y CN 200420012826 CN200420012826 CN 200420012826 CN 200420012826 U CN200420012826 U CN 200420012826U CN 2781619 Y CN2781619 Y CN 2781619Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- temperature switch
- protective device
- power supply
- overcurrent protective
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an overcurrent protector, which belongs to the field of manufacturing overcurrent protection devices, and is composed of a temperature switch (1), a starting resistor (2) and a sustaining resistor (3), wherein the temperature switch (1) is connected in series with the starting resistor (2), and connected in parallel to the sustaining resistor (3). The utility model can be made into a small overcurrent protector and arranged in a connection box of a power socket of a student dormitory so as to avoid the use of large power electric appliances, so that the functions of fire safety and electricity save are achieved.
Description
Technical field
The utility model belongs to the overcurrent protection device fabrication, and particularly temperature switch is used.
Background technology
Produce overcurrent protector at present after guard mode is cut off the electricity supply, power consumption equipment is in when stopping using state, and the overcurrent protector volume with automatic recovery of power supply function is bigger, can not be placed in the terminal box of each power supply terminal socket.
The utility model content
The utility model is a kind of small-sized overcurrent protective device, is placed in the supply socket terminal box of each student's use of students' dormitory.Overcurrent is stopped power supply power supply circuits during using than high-power electric appliance on being inserted in socket, but electrical appliance is closed automatic recovery of power supply.
The utility model structure is to seal in a less resistance and a temperature switch contact of resistance to install in current supply circuit.When using, seal in the resistance thermal discharge and increase, cause the temperature switch state variation, the outage of temperature switch control power supply circuits than high-power electric appliance.Overcurrent protective device is at the state of stopping power supply, and holding circuit work is kept overcurrent protective device in off-position.
After electrical appliance and power supply circuits disconnection, holding circuit quits work, and overcurrent protective device recovers initial power supply state automatically.Use this overcurrent protector, protection power failure scope is reduced, fire prevention, the economize on electricity in places such as students' dormitory had positive role.
Embodiment
The structure schematic diagram is by temperature switch (1), starting resistance (2), keep resistance (3) and form.Temperature switch (1) is with to keep resistance (3) in parallel, and temperature switch (1) is connected with starting resistance (2), and A point, B point seal in power supply circuits.The resistance that resistance (3) resistance is far longer than starting resistance (2) is kept in conducting when temperature switch (1) is operated in ambient temperature less than the setting operating temperature.When the electric current that flows through starting resistance (2) arrived specified protection value, starting resistance (2) evolution of heat was transmitted on the temperature switch (1), and temperature switch (1) disconnects.The impedance of keeping resistance (3) is far longer than the impedance that starting resistance is connected with load, and line voltage is similar to all to fall and is keeping on the resistance (3), has only in the load very that small voltage drop and very little electric current flow through, and being equivalent to load can not work.At this moment resistance is big keeps resistance (3) heat and is transmitted to temperature switch (1) and goes up and keep the temperature of temperature switch not reduce to below the rated function temperature, and holding temperature switch (1) is in off-state.When load and power supply circuits disconnect, to keep on the resistance no current and flow through and stop heating, temperature switch (1) recovers conducting state, and power supply circuits restore electricity.
Embodiment 4, and the big electric current overcurrent protective device of the utility model is to form big electric current overcurrent protective device structural representation as shown in Figure 4, is made up of temperature switch (1), starting resistance (2), socket (4), relay (5).Temperature switch (1) is an off-state when working in less than the rated function temperature environment, and connects with the coil of relay (5).Starting resistance (2) is connected with a wherein end of A point and socket (4) and seals in the power supply circuits.A point, C point are connected with electrical network, when being connected the high power load use that is limited to use with socket (4), starting resistance (2) caloric value increases, make temperature switch (1) reach the rated function temperature conducting, relay (5) adhesive, the E point of relay changeover contact, F point disconnect, and E point, D point are connected.Relay (5) coil impedance is far longer than the impedance that starting resistance (2) is connected with load, line voltage is similar to and all falls on the coil of circuit breaker (5), have only very little voltage drop and the very little electric current of adhesive that can only keep relay (5) to flow through in the load, load equivalent is in not working.Starting resistance (2) caloric value is very little, and temperature switch (1) disconnects, and when load and power supply circuits disengaging, relay (5) discharges, and power supply circuits restore electricity.
Electric current by relay contact can improve the rated value of protective current greater than flowing through the temperature switch electric current.
Description of drawings:
Fig. 1 is the utility model single line series connection in parallel overcurrent protective device schematic diagram.
Fig. 2 is the utility model single line series and parallel overcurrent protective device schematic diagram.
Fig. 3 is the utility model two-wire overcurrent protective device schematic diagram.
Fig. 4 is the big electric current overcurrent protective device of a utility model schematic diagram.
Claims (4)
1, a kind of overcurrent protective device by temperature switch (1), starting resistance (2), keep resistance (3) and form, it is characterized in that: temperature switch (1) is with to keep resistance (3) in parallel; Temperature switch (1) is connected with starting resistance (2).
2, a kind of overcurrent protective device by temperature switch (1), starting resistance (2), keep resistance (3) and form, it is characterized in that: after the same starting resistance of temperature switch (1) (2) series connection again with to keep resistance (3) in parallel.
3, a kind of overcurrent protective device by temperature switch (1), starting resistance (2), keep resistance (3), socket (4) is formed, it is characterized in that: starting resistance (2) is connected with power supply circuits; Temperature switch (1) is connected with power supply circuits with after keeping resistance (3) parallel connection again.
4, a kind of overcurrent protective device is made up of temperature switch (1), starting resistance (2), socket (4), relay (5), it is characterized in that: temperature switch (1) is connected with relay (5) coil; Starting resistance (2) is connected with power supply circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012826 CN2781619Y (en) | 2004-12-08 | 2004-12-08 | Overcurrent protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012826 CN2781619Y (en) | 2004-12-08 | 2004-12-08 | Overcurrent protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2781619Y true CN2781619Y (en) | 2006-05-17 |
Family
ID=36762817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420012826 Expired - Fee Related CN2781619Y (en) | 2004-12-08 | 2004-12-08 | Overcurrent protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2781619Y (en) |
-
2004
- 2004-12-08 CN CN 200420012826 patent/CN2781619Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101378187A (en) | Power supply protection circuit | |
| CN2781619Y (en) | Overcurrent protector | |
| CN203366023U (en) | AC control switch device and intelligent control system | |
| CN104953537A (en) | Overload protection switching device | |
| CN203166457U (en) | Control circuit for realizing intelligent regulation | |
| CN203434386U (en) | Safety socket with over current protection function | |
| CN206042482U (en) | Take over -current protection's drive circuit based on PLC | |
| CN202550215U (en) | Supply socket with the function of protection | |
| CN203242853U (en) | Power socket with overheating protection | |
| CN201290000Y (en) | Full-automatic intelligent lightning protection ultra-undervoltage protector | |
| CN204905838U (en) | Simple and easy overvoltage protection trigger device | |
| CN203242858U (en) | Safe socket assembly with over-current protection | |
| CN2416581Y (en) | Transformer for freezing cabinet | |
| CN104638627A (en) | Multifunctional intelligent power-saving system | |
| CN204886124U (en) | Prevent overload protection switching device | |
| CN202663099U (en) | Over-current and over-voltage protector with bimetallic-strip temperature switch | |
| CN2496168Y (en) | Electric intelligent switch | |
| CN203537072U (en) | A PDU capable of being controlled remotely | |
| CN103077861B (en) | Switching device trip coil protector | |
| CN211830226U (en) | SFK series low-voltage intelligent combination switch | |
| CN2476096Y (en) | Zero line-breaking protector | |
| CN109687388B (en) | Automatic load-limiting protector | |
| CN210722934U (en) | Sensing time-delay circuit breaker | |
| CN208874284U (en) | A kind of resistance-capacitance depressurization protection circuit | |
| CN201051591Y (en) | Socket special for computer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |