CN201477173U - Automatic detection module for power supply earth line failure - Google Patents

Automatic detection module for power supply earth line failure Download PDF

Info

Publication number
CN201477173U
CN201477173U CN2009201916895U CN200920191689U CN201477173U CN 201477173 U CN201477173 U CN 201477173U CN 2009201916895 U CN2009201916895 U CN 2009201916895U CN 200920191689 U CN200920191689 U CN 200920191689U CN 201477173 U CN201477173 U CN 201477173U
Authority
CN
China
Prior art keywords
circuit
detection module
power
automatic detection
computing
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
Application number
CN2009201916895U
Other languages
Chinese (zh)
Inventor
何余仁
刘宝泉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU HONGERTAI ELECTRIC CO Ltd
Original Assignee
HANGZHOU HONGERTAI ELECTRIC CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HANGZHOU HONGERTAI ELECTRIC CO Ltd filed Critical HANGZHOU HONGERTAI ELECTRIC CO Ltd
Priority to CN2009201916895U priority Critical patent/CN201477173U/en
Application granted granted Critical
Publication of CN201477173U publication Critical patent/CN201477173U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model provides an automatic detection module for power supply earth line failure with stable and reliable work performance, which can be encapsulated independently inside a casing to be used as a detection device or integrated as a partial functional circuit with other devices to be used as a whole. The automatic detection module for power supply earth line failure comprises a sampling circuit for sampling signals from a power supply earth line, an operational circuit for performing comparison operation to signals from the sampling circuit, an alarm element connected with an output end of the operational circuit and a power circuit for supplying power for the operational circuit. The automatic detection module for power supply earth line failure has high anti-interference property and stable work performance and capability of accurately detecting unusual running of the power earth line and giving an alarm.

Description

The power ground automatic detection module that lost efficacy
Technical field
The utility model relates to the electronic device manufacturing technology field, relates in particular to a kind of electron device that is used to detect the power ground circuit that has.
Background technology
The quality of power ground directly influences the quality of construction quality, and is particularly bigger to the lightening protection engineering influence.Good power ground can suppress the influence of external electromagnetic interference, can prevent that again electronic electric equipment is to outside launching electromagnetic wave; And the ground connection of losing efficacy usually can be introduced very serious disturbance, even can make the electronic electric equipment can't operate as normal.Especially control package and automation control system.The power supply interference often occurs with the form of surge, as the induced charge of introducing on thunder and lightning or the power lead.It can cause the fuse go, infringement circuit board, infringement bridge rectifier etc.Complete earthed system plays good protective action to the interference of power supply.Earthed system is good, can reduce the loss that fault is brought.Provide the low impedance path that returns power supply to earth-fault current, fuse or isolating switch are moved.
Summary of the invention
The utility model provides a kind of stable and reliable operation power ground automatic detection module that lost efficacy, this module both can individual packages in housing as detection means, also can be used as the partial function circuit and other instruments integrate use.
A kind of power ground automatic detection module that lost efficacy comprises:
The sample circuit of power ground signal is used to sample;
The signal of sample circuit is compared the computing circuit of computing;
The alarm element that links to each other with the computing circuit output terminal;
Be used for power circuit to the computing circuit power supply.
As preferably, be provided with first holding circuit between sample circuit and the computing circuit.
When excessive or ground wire had superpotential to scurry into when stake resistance, sample circuit voltage was raised rapidly, and superpotential or high-voltage pulse damage the computing circuit element easily, cause the product cisco unity malfunction.Before sample circuit voltage flows into computing circuit, first holding circuit of forming by relay, trigger circuit and controllable silicon of series connection on the circuit.When circuit had superpotential or high-voltage pulse, trigger circuit were given pulse of controllable silicon, and the controllable silicon conducting is powered to relay then, and sample circuit is cut off in the actuating of relay, the protection computing circuit, and detection module shows stake resistance inefficacy warning simultaneously.
Described power circuit comprises:
Second holding circuit that is connected with civil power live wire, zero line;
The reduction voltage circuit that links to each other with second holding circuit;
The current converter circuit that links to each other with reduction voltage circuit;
Wherein the output terminal of current converter circuit is powered to computing circuit.
When in the detection module system during certain line short; on L, N circuit, can produce a very big short-circuit current; for the purpose of line security, second holding circuit that is installed in series on L, N circuit (being time-delay fuse) is protected circuit, can avoid unnecessary loss to take place.
Described alarm element is at least a in loudspeaker, the light emitting diode, also can be other sound, optical element or circuit, as preferably, between computing circuit and alarm element, be provided with amplifying circuit, can be a triode, the computing circuit output terminal inserts transistor base, transistor collector element input end taking alarm, transistor emitter ground connection.
The alarm element output terminal inserts the live wire between current converter circuit and the computing circuit, the zero line ground connection between current converter circuit and the computing circuit.
Civil power of the present utility model refers to 220V or 380V alternating current, and L represents live wire, and N represents zero line.
The utility model power ground automatic detection module antijamming capability that lost efficacy is strong, and working stability can detect the unusual of power ground accurately and reports to the police.
Description of drawings
Fig. 1 is the lost efficacy structural representation of automatic detection module of the utility model power ground.
Embodiment
Referring to Fig. 1, the utility model power ground automatic detection module that lost efficacy comprises:
The sample circuit of power ground signal is used to sample;
The signal of sample circuit is compared the computing circuit of computing, be provided with first holding circuit between sample circuit and the computing circuit;
The alarm element that links to each other with the computing circuit output terminal;
Be used for power circuit to the computing circuit power supply.
Power circuit comprises:
Second holding circuit that is connected with civil power live wire, zero line;
The reduction voltage circuit that links to each other with second holding circuit;
The current converter circuit that links to each other with reduction voltage circuit;
Wherein the output terminal of current converter circuit is powered to computing circuit.
Between computing circuit and alarm element, be provided with and be used for the triode 3 that signal amplifies, computing circuit output terminal access transistor base, transistor collector element input end taking alarm, transistor emitter ground connection.Alarm element is loudspeaker 2 and the light emitting diode 1 that is connected in parallel on transistor collector.
When the utility model power ground lost efficacy the work of automatic detection module:
Civil power enters current converter circuit after through second holding circuit, reduction voltage circuit, after current converter circuit changes direct current with alternating current, inserts computing circuit and powers to entire circuit.
Sample circuit is taken a sample to power ground; sampled signal is sent to computing circuit after first holding circuit (computing circuit input end sampled signal was lost efficacy overvoltage protection); the canonical parameter contrast that computing circuit carries out computing to sampled signal and sets; judge whether power ground meets the requirements; undesirable; signal drives to alarm element and reports to the police after triode is sent out greatly, light emitting diode has the light indication, and with the loudspeaker buzzer.

Claims (6)

1. a power ground automatic detection module that lost efficacy is characterized in that: comprising:
The sample circuit of power ground signal is used to sample;
The signal of sample circuit is compared the computing circuit of computing;
The alarm element that links to each other with the computing circuit output terminal;
Be used for power circuit to the computing circuit power supply.
2. the power ground as claimed in claim 1 automatic detection module that lost efficacy is characterized in that: be provided with first holding circuit between sample circuit and the computing circuit.
3. the power ground as claimed in claim 1 or 2 automatic detection module that lost efficacy, it is characterized in that: described power circuit comprises:
Second holding circuit that is connected with civil power live wire, zero line;
The reduction voltage circuit that links to each other with second holding circuit;
The current converter circuit that links to each other with reduction voltage circuit;
Wherein the output terminal of current converter circuit is powered to computing circuit.
4. the power ground as claimed in claim 1 automatic detection module that lost efficacy is characterized in that: described alarm element is at least a in loudspeaker, the light emitting diode.
5. the power ground as claimed in claim 1 automatic detection module that lost efficacy is characterized in that: be provided with amplifying circuit between computing circuit and alarm element.
6. the power ground as claimed in claim 5 automatic detection module that lost efficacy, it is characterized in that: described amplifying circuit is a triode, the computing circuit output terminal inserts transistor base, transistor collector element input end taking alarm, transistor emitter ground connection.
CN2009201916895U 2009-08-17 2009-08-17 Automatic detection module for power supply earth line failure Expired - Fee Related CN201477173U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201916895U CN201477173U (en) 2009-08-17 2009-08-17 Automatic detection module for power supply earth line failure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201916895U CN201477173U (en) 2009-08-17 2009-08-17 Automatic detection module for power supply earth line failure

Publications (1)

Publication Number Publication Date
CN201477173U true CN201477173U (en) 2010-05-19

Family

ID=42413426

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009201916895U Expired - Fee Related CN201477173U (en) 2009-08-17 2009-08-17 Automatic detection module for power supply earth line failure

Country Status (1)

Country Link
CN (1) CN201477173U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063993A (en) * 2012-12-31 2013-04-24 山东电力集团公司青岛供电公司 Oscillatory wave system and protective relaying type detection impedor and detection impedance protective device
CN104698350A (en) * 2012-12-31 2015-06-10 国网山东省电力公司青岛供电公司 Oscillatory wave system
CN105158625A (en) * 2015-07-30 2015-12-16 青岛海尔科技有限公司 Grounding detection device for household electrical appliance ground wire

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063993A (en) * 2012-12-31 2013-04-24 山东电力集团公司青岛供电公司 Oscillatory wave system and protective relaying type detection impedor and detection impedance protective device
CN103063993B (en) * 2012-12-31 2015-05-20 山东电力集团公司青岛供电公司 Oscillatory wave system and protective relaying type detection impedor and detection impedance protective device
CN104698350A (en) * 2012-12-31 2015-06-10 国网山东省电力公司青岛供电公司 Oscillatory wave system
CN104698350B (en) * 2012-12-31 2016-03-23 国网山东省电力公司青岛供电公司 A kind of oscillatory wave system
CN105158625A (en) * 2015-07-30 2015-12-16 青岛海尔科技有限公司 Grounding detection device for household electrical appliance ground wire
CN105158625B (en) * 2015-07-30 2019-03-22 青岛海尔科技有限公司 A kind of ground detection device of household electrical appliance ground wire

Similar Documents

Publication Publication Date Title
CN101382572B (en) Novel detection device for protector for surge
CN102761097A (en) Direct current leakage protective circuit
CN101788617A (en) Magnetic energy detector for surge protector
CN201477173U (en) Automatic detection module for power supply earth line failure
CN203204114U (en) Direct current grounding alarm based on current detector with openings
CN104332948A (en) Arc fault protection device
CN201429658Y (en) Magnetic energy detection device for surge protector
CN201107377Y (en) New type testing apparatus of surge protector
CN201477166U (en) Automatic detection module for failure of working grounding cable
CN102570439A (en) Built-in detection device of surge protector
CN202678933U (en) DC earth leakage protection circuit
CN102931631B (en) Output earth leakage protection device for high-voltage and direct-current power supply system
CN201937242U (en) Monitoring device of surge protector
CN205039533U (en) Line protection measurement and control device
CN202050231U (en) Built-in detecting device of surge protector
CN202094621U (en) Intelligent monitoring type surge protector
CN201674281U (en) Electrical leakage protector with wireless communication function
CN201503473U (en) Electric leakage protector detector
CN203707762U (en) Novel surge protection device
CN201489076U (en) Automatic detection module of building ground wire failure
CN202904290U (en) Control and protection switch controller with temperature detection function
CN105954587A (en) Harmonic wave detection circuit of distribution system and harmonic wave detection method of harmonic wave detection circuit
CN203589690U (en) An electric arc protective device
CN210835189U (en) Arc fault and electric leakage fault detection protection system and charging pile
CN102570386A (en) Back-up protection device (relay) of surge protector

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: 20100519

Termination date: 20120817