CN2145466Y - Device for fuse wire emergency break because of a.c. power overpressure - Google Patents
Device for fuse wire emergency break because of a.c. power overpressure Download PDFInfo
- Publication number
- CN2145466Y CN2145466Y CN 92238675 CN92238675U CN2145466Y CN 2145466 Y CN2145466 Y CN 2145466Y CN 92238675 CN92238675 CN 92238675 CN 92238675 U CN92238675 U CN 92238675U CN 2145466 Y CN2145466 Y CN 2145466Y
- Authority
- CN
- China
- Prior art keywords
- relay
- power supply
- fuse wire
- fuse
- normally open
- 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
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a device for fuse wire emergent breaking because of an AC power supply, comprising a relay, a normally open contact of the relay, and an electric plug which are connected in parallel. The electric plug is inserted into any electric socket of the 220V power supply circuit which is connected a fuse wire in series; once the voltage of the 220V power supply exceeds 250V due to some reason, and reaches the attraction voltage of the relay, the normally open contact of the relay closes, the power supply is shorten circuit, the fuse wire burns out, and the power supply loop is immediately cut off. The device for fuse wire emergent breaking because of an AC power supply ensures the household appliances being prevented from breakdown loss by the high voltage.
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 the normally opened contact with the coil of a relay and relay is connected in parallel, and joins with a plug.Plug is inserted 220 of serial connection fuse
On the power circuit in any supply socket.When 220
Power supply voltage for some reason raises above 250
, reach the relay pick-up voltage, the normally opened contact closure of relay, 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 basic circuit diagram of the present utility model.
Below in conjunction with accompanying drawing the utility model is described in further detail.
With reference to Fig. 1.Relay 1, its rated voltage 380
, pick-up voltage 250
Relay normally open contact 2.Plug 3.The coil of relay 1 and relay normally open contact 2 are connected in parallel and join with plug 3.Be that the fixed contact of coil one end of relay 1 and relay normally open contact 2 joins and joins with the phase line electric contact piece of plug 3, the coil of relay 1 moving contact of end and relay normally open contact 2 in addition joins and joins with the zero line electric contact piece of plug 3.Plug 3 is inserted 220 of serial connection fuse
In any electrical socket, the coil of relay 1 adds 220 on the power circuit
Power supply, (being lower than the relay pick-up voltage), relay normally open contact 2 keeps normally open.When 220
Power supply voltage for some reason uprises above 250
, the coil of relay 1 adds 250
Power supply, (reaching the relay pick-up voltage), relay normally open contact 2 closures, short circuit power supply, fuse failure.
Claims (2)
1, the AC power overvoltage of being made up of relay 1, relay normally open contact 2, plug 3 makes the device of the urgent fusing of fuse, it is characterized in that the coil of relay 1 and relay normally open contact 2 is connected in parallel and join with plug 3.
2, make the device of the urgent fusing of fuse by the described AC power overvoltage of claim 1, the fixed contact that it is characterized in that coil one end of relay 1 and relay normally open contact 2 joins and joins with the phase line electric contact piece of plug 3, and the coil of relay 1 moving contact of end and relay normally open contact 2 in addition joins and joins with the zero line electric contact piece of plug 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238675 CN2145466Y (en) | 1992-10-26 | 1992-10-26 | Device for fuse wire emergency break because of a.c. power overpressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92238675 CN2145466Y (en) | 1992-10-26 | 1992-10-26 | Device for fuse wire emergency break because of a.c. power overpressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2145466Y true CN2145466Y (en) | 1993-11-03 |
Family
ID=33779610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92238675 Expired - Fee Related CN2145466Y (en) | 1992-10-26 | 1992-10-26 | Device for fuse wire emergency break because of a.c. power overpressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2145466Y (en) |
-
1992
- 1992-10-26 CN CN 92238675 patent/CN2145466Y/en not_active Expired - Fee Related
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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 |