CN2074054U - Device capable of emergently fusing fuse-element by overvoltage of a.c. power supply - Google Patents
Device capable of emergently fusing fuse-element by overvoltage of a.c. power supply Download PDFInfo
- Publication number
- CN2074054U CN2074054U CN 89217698 CN89217698U CN2074054U CN 2074054 U CN2074054 U CN 2074054U CN 89217698 CN89217698 CN 89217698 CN 89217698 U CN89217698 U CN 89217698U CN 2074054 U CN2074054 U CN 2074054U
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- China
- Prior art keywords
- power supply
- tnr
- fuse
- overvoltage
- voltage
- 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.)
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a device capable of emergently fusing a fuse element by the overvoltage of an A. C. power supply. A bidirectional overvoltage protection diode (TNR) with a steady voltage of 250V is connected with a plug of a power supply. One electrode of the (TNR) is connected with a phase line electric contact piece of the plug of the power supply; the other electrode of the (TNR) is connected with a zero line electric contact piece of the plug of the power supply. The utility model is inserted into the socket of any power supply of 220V, once the voltage of the power supply of 220V reaches higher than 250V due to accident, the utility model can automatically shorten the power supply; the fuse in a house is fused; the power supply loop is cut off, so household appliances are prevented from being damaged by high voltage, thunder and lightning.
Description
The utility model is the device that a kind of AC power overvoltage makes the urgent fusing of fuse, is applicable to the voltage rising for some reason when the ac power supply system, power device power supply overtension, and the automatic short-circuit power supply, fuse promptly fuses.
Existing fuse technique is because the blowout current of fuse is 2 times of rated current, so when the voltage rising for some reason of ac power supply system, power device adds that the mistake voltage source that is higher than rated operational voltage is (as 220
Rise to 380
), the power device operating current increases, but always is lower than the blowout current of fuse, and fuse still can not fuse, but very easy overheated the burning out of power device.
The purpose of this utility model provides the device that a kind of AC power overvoltage makes the urgent fusing of fuse.The voltage rising is above 250 volts for some reason when 220 volts of ac power supply systems, and it can short circuit cross voltage source, and fuse promptly fuses, and the loop of cutting off the electricity supply prevents that effectively power device from burning out because of adding that voltage source is overheated.
The purpose of this utility model is achieved in that with a voltage of voltage regulation be 250
Two-way overvoltage protection diode (TNR) and an attaching plug join, promptly the phase line electric contact piece of a utmost point of (TNR) and attaching plug joins, other utmost point (TNR) and the zero line electric contact piece of attaching plug join.Be inserted into 220 of serial connection fuse
On the power circuit in any supply socket.When 220
Power supply voltage for some reason raises above 250
, (TNR) voltage source is crossed in short circuit immediately, and fuse is promptly fused.
The utility model is because can automatic short-circuit 250
Cross voltage source, and fuse is promptly fused cut off the overvoltage electric power loop, so, can prevent effectively that power device from adding the mistake voltage source that is higher than rated operational voltage and overheated burning out.
Concrete structure of the present utility model by following embodiment with and accompanying drawing provide:
Fig. 1 is a concrete structure profile of the present utility model.
Below in conjunction with accompanying drawing the utility model is described in further detail.
With reference to Fig. 1.Attaching plug 1; Phase line electric contact piece 2; Zero line electric contact piece 3; Two-way overvoltage protection diode (TNR) 4, it is a kind of device with bi-directional voltage stabilizing diode characteristic and two-way negative resistance charactertistic double properties, model OF729, voltage of voltage regulation 250
One utmost point of two-way overvoltage protection diode (TNR) 4 and the phase line electric contact piece 2 of attaching plug 1 join, and the zero line electric contact piece 3 of the utmost point and attaching plug 1 joins in addition.Characteristics of the present utility model are that 4 and attaching plugs 1 of a two-way overvoltage protection diode (TNR) are joined, and form independently components and parts.Has practicality widely, as long as be inserted in the family any one 220
In the supply socket, in case 220
Power supply voltage for some reason raises above 250
, (TNR) 4 short circuit power supplys immediately, the urgent fusing of the fuse loop of cutting off the electricity supply.
Claims (2)
1, a kind of AC power overvoltage of being made up of 4 and attaching plugs 1 of a two-way overvoltage protection diode (TNR) makes the device of the urgent fusing of fuse; it is characterized in that 4 and attaching plugs 1 of a two-way overvoltage protection diode (TNR) join; promptly the phase line electric contact piece 2 of the utmost point of (TNR) 4 and attaching plug 1 joins, and (TNR) 4 the utmost point in addition and the zero line electric contact piece 3 of attaching plug 1 join.
2, make the device of the urgent fusing of fuse by the described AC power overvoltage of claim 1; it is characterized in that two-way overvoltage protection diode (TNR) the 4th, a kind of device with bi-directional voltage stabilizing diode characteristic and two-way negative resistance charactertistic double properties; model OF729, voltage of voltage regulation 250
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89217698 CN2074054U (en) | 1989-10-04 | 1989-10-04 | Device capable of emergently fusing fuse-element by overvoltage of a.c. power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89217698 CN2074054U (en) | 1989-10-04 | 1989-10-04 | Device capable of emergently fusing fuse-element by overvoltage of a.c. power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2074054U true CN2074054U (en) | 1991-03-27 |
Family
ID=4872904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89217698 Pending CN2074054U (en) | 1989-10-04 | 1989-10-04 | Device capable of emergently fusing fuse-element by overvoltage of a.c. power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2074054U (en) |
-
1989
- 1989-10-04 CN CN 89217698 patent/CN2074054U/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |