CN202094625U - Direct current electric appliance grounding detection and pressure release protective device - Google Patents
Direct current electric appliance grounding detection and pressure release protective device Download PDFInfo
- Publication number
- CN202094625U CN202094625U CN2011201603031U CN201120160303U CN202094625U CN 202094625 U CN202094625 U CN 202094625U CN 2011201603031 U CN2011201603031 U CN 2011201603031U CN 201120160303 U CN201120160303 U CN 201120160303U CN 202094625 U CN202094625 U CN 202094625U
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- direct current
- circuit
- electric appliance
- protective device
- pressure release
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Abstract
The utility model discloses a direct current electric appliance grounding detection and pressure release protective device which includes a first parallel circuit composed of a direct current surge alarm circuit and an anti-surge protective circuit. One end of the first parallel circuit is connected with the anode of a direct current power supply, and the other end is connected with the ground. One end of a direct current zero-to-earth detecting circuit is connected with one end of an alarm display module to form a series circuit, and the series circuit forms a second parallel circuit with an alarm circuit protective device. One end of the second parallel circuit is connected with the cathode of the direct current power supply, and the other end is connected with the ground. The direct current electric appliance grounding detection and pressure release protective device can be used in a weak current control system and an appliance power supply system. The beneficial effects are that the direct current electric appliance grounding detection and pressure release protective device can detect whether or not the grounding in an electric appliance accords with the requirements, protect an electric appliance control system from being damaged caused by the overvoltage, reduce the appliance damage caused by a poor power supply environment, and reduce the faults of the control system resulted by special reasons, like the lightning stroke, the maloperation, and the like.
Description
Technical field
The utility model belongs to the low voltage electrical apparatus technology field, and particularly a kind of dc electric apparatus ground connection is detected and the decompression protection device.
Background technology
In the prior art; low voltage equipment, for example the direct current 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 dc electric apparatus ground connection and detects and the decompression protection device.
The technical solution of the utility model is that a kind of dc electric apparatus ground connection is detected and the decompression protection device, comprising:
First parallel circuits that direct current surge warning circuit and anti-surge protection circuit are formed, a termination dc power anode of this first parallel circuits, other end ground connection;
One end of one termination alarm indication module of direct current zero ground testing circuit is formed series circuit, and this series circuit and alarm circuit protective device are formed second parallel circuits, a termination dc power cathode of this second parallel circuits, other end ground connection.
The utility model can use in light-current system and power devices system, and its beneficial effect is: whether the ground connection that can detect in the electric equipment meets the requirements; The damage that can protect electrical apparatus control system to cause because of overvoltage; This device can reduce because of the bad device damage that causes of power supply environment; Can reduce the fault that causes control system because of cause specific as thunderbolt, misoperation etc.
Description of drawings
Fig. 1 is a device theory of constitution block diagram of the present utility model
Embodiment
As shown in Figure 1, dc electric apparatus ground connection of the present utility model is detected and the decompression protection device, comprising: first parallel circuits that direct current surge warning circuit and anti-surge protection circuit are formed, a termination dc power anode of this first parallel circuits, other end ground connection; One end of one termination alarm indication module of direct current zero ground testing circuit is formed series circuit, and this series circuit and alarm circuit protective device are formed second parallel circuits, a termination dc power cathode of this second parallel circuits, other end ground connection.
Detect for ground connection, this device adopts and detects in the DC power supply circuit mode of negative pole and earthed voltage whether detect the interior earth connection of whole electric power system good.When surpassing 1v, zero ground voltage the earth connection loose contact can be described 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 negative pole and ground wire voltage were lower than 1V, current-limiting resistance played dividing potential drop, triode cut-off state in the warning circuit when being lower than 0.7v, and light-emitting diode does not work.Illustrate that whole system ground connection is good.
Marquis when negative pole and ground wire voltage surpass 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.
For the anti-surge protection of pressure release, design in order to solve the overvoltage that runs in the circuit, cause 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, electric current and voltage can't pass through warning circuit, and light-emitting diode is in the state that does not work.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, resistance is tending towards 0 ohm, directly in the conducting ground path, discharges over the ground.Light-emitting diode is lighted and is sent alarm signal, and the assurance whole system is normally moved.
When voltage returned to normal value, the resistance of voltage protection circuit 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.
Ground connection for control circuit board is detected and the circuit over-pressure safety device, can comprise the detection of control board ground connection, and grounding alarm shows, circuit over voltage alarm demonstration and overvoltage shunting.
This device is installed between the positive pole and ground wire in the control system DC line, between negative pole and the ground wire.Alarm lamp is placed and the outside of control circuit board is used for show state.
Claims (1)
1. a dc electric apparatus ground connection is detected and the decompression protection device, it is characterized in that, comprising:
First parallel circuits that direct current surge warning circuit and anti-surge protection circuit are formed, a termination dc power anode of this first parallel circuits, other end ground connection;
One end of one termination alarm indication module of direct current zero ground testing circuit is formed series circuit, and this series circuit and alarm circuit protective device are formed second parallel circuits, a termination dc power cathode of this second parallel circuits, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201603031U CN202094625U (en) | 2011-05-18 | 2011-05-18 | Direct current electric appliance grounding detection and pressure release protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201603031U CN202094625U (en) | 2011-05-18 | 2011-05-18 | Direct current electric appliance grounding detection and pressure release protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202094625U true CN202094625U (en) | 2011-12-28 |
Family
ID=45369668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201603031U Expired - Fee Related CN202094625U (en) | 2011-05-18 | 2011-05-18 | Direct current electric appliance grounding detection and pressure release protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202094625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377012A (en) * | 2018-02-26 | 2018-08-07 | 北京新能源汽车股份有限公司 | A kind of charge protection method, device and control device |
-
2011
- 2011-05-18 CN CN2011201603031U patent/CN202094625U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377012A (en) * | 2018-02-26 | 2018-08-07 | 北京新能源汽车股份有限公司 | A kind of charge protection method, device and control device |
| CN108377012B (en) * | 2018-02-26 | 2020-12-11 | 北京新能源汽车股份有限公司 | Charging protection method and device and control equipment |
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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 |