CN202094626U - Electric apparatus grounding test and voltage-releasing protection device - Google Patents
Electric apparatus grounding test and voltage-releasing protection device Download PDFInfo
- Publication number
- CN202094626U CN202094626U CN2011201603050U CN201120160305U CN202094626U CN 202094626 U CN202094626 U CN 202094626U CN 2011201603050 U CN2011201603050 U CN 2011201603050U CN 201120160305 U CN201120160305 U CN 201120160305U CN 202094626 U CN202094626 U CN 202094626U
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- circuit
- voltage
- ground connection
- protection device
- releasing
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Abstract
The utility model relates to an electric apparatus grounding test and voltage-releasing protection device, which comprises an over-voltage detection circuit, a voltage-stabilizing protection circuit and a grounding warning circuit, wherein, one end of the over-voltage detection circuit is connected with a power supply zero line, and the other end is connected with one end of a parallel circuit where the voltage-stabilizing protection circuit and the grounding warning circuit are connected, and the other end of the parallel circuit is grounded; and the electric apparatus grounding test and voltage-releasing protection device further comprises a parallel circuit where an over-voltage voltage-releasing circuit and the voltage-releasing warning circuit are connected, and one end of the parallel circuit is connected with a power supply phase line, and the other end is grounded. The electric apparatus grounding test and voltage-releasing protection device has the advantages of low cost and convenience in mounting.
Description
Technical field
The utility model belongs to low-voltage electrical apparatus resist technology field, and particularly a kind of electrical equipment ground connection is detected and the decompression protection device.
Background technology
In the prior art; low voltage equipment, for example air-conditioning control circuit board often because ground connection is undesirable, perhaps protect electrical apparatus control system because of overvoltage; perhaps, perhaps cause the fault of various control system as thunderbolt, misoperation etc. because of cause specific because the power supply environment is bad.
The utility model content
The purpose of this utility model provides a kind of electrical equipment ground connection and detects and the decompression protection device, the system failure that causes owing to ground connection and superpotential reason with the solution low-voltage electrical apparatus.
The technical solution of the utility model is, a kind of electrical equipment ground connection is detected and the decompression protection device,
Comprise over-voltage detection circuit, protective circuit of voltage regulation and grounding alarm circuit, one termination power zero line of over-voltage detection circuit, one end of the parallel circuits of another termination protective circuit of voltage regulation and grounding alarm circuit, the other end ground connection of the parallel circuits of described protective circuit of voltage regulation and grounding alarm circuit;
The parallel circuits that also comprises overvoltage pressure release circuit and pressure release warning circuit, a termination power phase line of this parallel circuits, other end ground connection.
Described overvoltage pressure release circuit adopts anti-surge protection circuit.
This installation cost is cheap, and is easy for installation, practical, and result of use is good.
Description of drawings
Fig. 1 is a device theory of constitution block diagram of the present utility model
Embodiment
As shown in Figure 1, electrical equipment ground connection of the present utility model is detected and the decompression protection device, comprise over-voltage detection circuit, protective circuit of voltage regulation and grounding alarm circuit, one termination power zero line of over-voltage detection circuit, one end of the parallel circuits of another termination protective circuit of voltage regulation and grounding alarm circuit, the other end ground connection of the parallel circuits of described protective circuit of voltage regulation and grounding alarm circuit; The parallel circuits that also comprises overvoltage pressure release circuit and pressure release warning circuit, a termination power phase line of this parallel circuits, other end ground connection.Described overvoltage pressure release circuit can adopt anti-surge protection circuit.
Whether the ground connection in this device detection adopts the mode that detects zero ground voltage to detect whole power supply earth connection good, when surpassing 1v, zero ground voltage can prove the earth connection loose contact or not have ground connection that the Circuits System that does not have ground connection has increased very big risk to the stability of The whole control system.
When zero line and ground wire voltage are lower than 1V, play the dividing potential drop triode through current-limiting resistance and be lower than 0.7v, triode is in cut-off state in the warning circuit, and light-emitting diode does not work.Illustrate that whole system ground connection is good.
When zero line and ground wire voltage are higher than 1v, through the dividing potential drop of current-limiting resistance, conducting when triode reaches 0.7V in the warning circuit, light-emitting diode is bright, illustrates that whole system ground connection is undesired.
When voltage continue to rise, the zener diode in the protective circuit of voltage regulation carries out reverse breakdown unnecessary energy is discharged in the ground path, simultaneously light-emitting diode is played effect to protecting.
Decompression protection in this device designs in order to solve the overvoltage that runs in the circuit, causes the fault of control system in the circuit owing to a variety of causes overtension.Concrete principle is as follows:
When the resistance of voltage excess voltage protection under normal situation be an infinity, circuit is in off-state.No-voltage is by voltage pressure release circuit, and the alarm indication circuit is in the demonstration normal condition.The direct metering-in control system of electric current and voltage provides stable power to control system.
When the voltage overrun, along with the piezo-resistance resistance in the rising protective circuit of voltage is low gradually, there is voltage to pass through protective circuit gradually, when voltage rose to certain value, resistance moved closer to 0 ohm, directly in the conducting ground path, discharged over the ground.Warning circuit is connected in parallel in the voltage protection circuit, and warning circuit reaches alarming value and reports to the police.
When voltage returned to normal value, the resistance of excess voltage protection returned to infinity, and the decompression protection circuit is in closed condition, system's power supply operate as normal.
The pressure release circuit will be installed the components and parts of different grades according to different electric pressures.
When the ground connection that is used for control circuit board when this device was detected with the circuit over-pressure safety device: comprise the detection of control board ground connection, grounding alarm showed that circuit over voltage alarm demonstration is shunted with overvoltage.This device is installed between the phase line and earth connection of the ac power input end in the control system, between zero line and the earth connection.Alarm lamp is placed and the outside of control circuit board is used for show state.
The utility model can use that its beneficial effect is in light-current system and power devices system:
1. whether the ground connection that can detect in the electric equipment meets the requirements.
2. the damage that can protect electrical apparatus control system to cause because of overvoltage.
3. this device can reduce because of the bad device damage that causes of power supply environment.
4. can reduce the fault that causes control system because of cause specific as thunderbolt, misoperation etc.
5. this installation cost is cheap, and is easy for installation, practical, and result of use is good.
Claims (2)
1. an electrical equipment ground connection is detected and the decompression protection device, it is characterized in that:
Comprise over-voltage detection circuit, protective circuit of voltage regulation and grounding alarm circuit, one termination power zero line of over-voltage detection circuit, one end of the parallel circuits of another termination protective circuit of voltage regulation and grounding alarm circuit, the other end ground connection of the parallel circuits of described protective circuit of voltage regulation and grounding alarm circuit;
The parallel circuits that also comprises overvoltage pressure release circuit and pressure release warning circuit, a termination power phase line of this parallel circuits, other end ground connection.
2. electrical equipment ground connection as claimed in claim 1 is detected and the decompression protection device, it is characterized in that, described overvoltage pressure release circuit adopts anti-surge protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201603050U CN202094626U (en) | 2011-05-18 | 2011-05-18 | Electric apparatus grounding test and voltage-releasing protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201603050U CN202094626U (en) | 2011-05-18 | 2011-05-18 | Electric apparatus grounding test and voltage-releasing protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202094626U true CN202094626U (en) | 2011-12-28 |
Family
ID=45369669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201603050U Expired - Fee Related CN202094626U (en) | 2011-05-18 | 2011-05-18 | Electric apparatus grounding test and voltage-releasing protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202094626U (en) |
-
2011
- 2011-05-18 CN CN2011201603050U patent/CN202094626U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20140518 |