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Device for protection from thunder

A protection device and lightning damage technology, which is applied in the direction of emergency protection circuit devices, measuring devices, circuit devices, etc., can solve the problem of no approaching lightning and achieve the effects of protecting from lightning damage, avoiding misjudgment, and eliminating power loss

Inactive Publication Date: 2006-01-18
NIPPONKOATSUDENKI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the indoor line is interrupted by lightning, the device returns to its original state due to the power outage, and there is a problem that when the control power is restored again, it remains in the original state even if another lightning is approaching. State initialized without lightning approach
[0005] Also, if there is a power outage while maintaining the lightning approach state, there is another problem of maintaining the lightning approach state even if there is no lightning approach after the power is restored
[0006] Although as a countermeasure that must be taken, when the control power supply is interrupted, it can be considered to use a battery, etc. to provide a backup power circuit for memorizing whether a lightning strike is approaching, in this case, there is another problem, that is, the need to conduct Maintenance of backup power

Method used

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  • Device for protection from thunder

Examples

Experimental program
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Embodiment 1

[0027] The first embodiment relates to a lightning protection device which is connected to a low-voltage power supply line and interrupts a load from a household line only during a period in which lightning is approaching, so that no trouble is caused in recovery even if a power outage occurs.

[0028] (1) The structure of the lightning protection device

[0029] The lightning protection device of the first embodiment is inserted between a circuit 10 connected to a service line or the like led from the outdoors to the indoors, and a load-side circuit 20 connected to a power supply of a device to be protected.

[0030] The lightning protection device 1 includes a power circuit 4 , a lightning detection circuit 5 , an operation control part 6 and a state switching switch 7 . Also, in the circuit 10 and the load-side circuit 20, a lightning protection device 90 each having a lightning arrester and a surge absorbing device is connected across each phase line.

[0031] The power s...

no. 3 example

[0073] exist Figure 5 , when the anti-lightning state occurs, the anti-lightning transformer 30 can be inserted between the circuit 10 and the load-side circuit 20, such as image 3 shown. Alternatively, only the state switching switch 7 may be provided to the communication lines 11, 21 for switching between the normal state and the anti-lightning state.

[0074] Next, the operation in the case where the circuit 10 is interrupted due to lightning or the like will be described. Due to the power failure, the power supply from the lightning protection device 1 to the power circuit 4 is lost, thereby stopping the work of the lightning detection circuit 5 . At this time, since the state changeover switch 7 is mechanically held, the normal state and the anti-lightning state just before the power-off can also be maintained during the power-off.

[0075] If an electromagnetic contact device, such as a relay, which is recoverable without voltage is used as the state switching switc...

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Abstract

This invention aims at preventing a thunderbolt attack detecting circuit from determining that no thunderbolt is approaching because the thunderbolt attack detecting circuit turns to its initial condition due to power interruption caused by an approaching thunderbolt and is changed over into a normal condition in the thunderbolt approaching status maintained. This thunderbolt disaster protecting apparatus comprises a thunderbolt attack detecting circuit for determining whether or not any thunderbolt is approaching by detecting a thunderbolt signal and a switching mechanism for changing over to the normal condition in which a protection object device is connected to an electric path or to thunderbolt resisting condition in which the protection object device is separated from the electric path. And this apparatus obtains a control power supply from the electric path and is changed over to the normal condition at the normal time when no thunderbolt is approaching and to the thunderbolt resisting condition when any thunderbolt is approaching according to a signal from the thunderbolt attack detecting circuit. And when the control power is interrupted, after the control power is restored, this apparatus determines whether or not any thunderbolt is approaching in a predetermined time interval and changes over the status to thunderbolt resisting condition when any thunderbolt is approaching and to the normal condition when the condition is normal.

Description

technical field [0001] The invention relates to a lightning damage protection device, which is used to protect electronic devices from being damaged by lightning surges that enter from industrial frequency power lines and are accompanied by lightning strikes. More particularly, the present invention relates to a lightning protection device which minimizes power loss accompanying lightning strike protection. Background technique [0002] Generally, the industrial power frequency power line is distributed to residential buildings, etc., after the voltage of the high-voltage line is reduced to 100V by a transformer on a utility pole, and is supplied to home appliances such as refrigerators, washing machines, air conditioners, etc., and connected to the circuit. Other home appliances supply power, and at the same time supply power to equipment such as televisions, telephones, fax machines, personal computers, etc. that are connected to the communication line. [0003] As for el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/22H02H9/04G01W1/16
Inventor 中田良作
Owner NIPPONKOATSUDENKI
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