CN106019053B - A kind of detection circuit and detection method of the judgement of Alternating Current Power Supply protecting field reliable ground - Google Patents
A kind of detection circuit and detection method of the judgement of Alternating Current Power Supply protecting field reliable ground Download PDFInfo
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- CN106019053B CN106019053B CN201610455554.XA CN201610455554A CN106019053B CN 106019053 B CN106019053 B CN 106019053B CN 201610455554 A CN201610455554 A CN 201610455554A CN 106019053 B CN106019053 B CN 106019053B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The present invention relates to the detection circuits and detection method of a kind of judgement of Alternating Current Power Supply protecting field reliable ground.After relay relay1 is closed, Alternating Current Power Supply passes through ＂ fire zero curve ＂ reduction voltage circuits, according to the matching of capacitance C1, capacitance C2 and capacitance C3 capacitances, the voltage that relay relay2, the contacts relay relay3 can be made to act is obtained, and then controls output control and indicating circuit, when indicator light D10 is bright, illustrate that ground connection is reliable, has ac output voltage, when indicator light D10 does not work, indicate that ground connection is unreliable, output end is exported without alternating voltage.The beneficial effects of the invention are as follows：Circuit is simple, can detect Grounding in real time, and result judgement is quickly, accurately, easy to use.When user equipment can not be abutted against safety protection earth in use, circuit of the present invention can prevent its damage, not only ensured the reliable use of user equipment, but also can guarantee the personal safety of operator to using equipment to give power-off protection.
Description
Technical field
The present invention relates to one kind in the fields such as medical treatment, industry, environmental protection, for the friendship of widely used various high voltage power supplies
With the flowing power supply protection detection circuit and detection method of reliable ground judgement.
Background technology
The high voltage power supply used in many application fields, output voltage is generally all very high, about in 20KV or more, such as
Fruit high voltage power supply output ground does not connect Alternating Current Power Supply input protecting field to be held very much then output high pressure is relative to the earth suspended state
Easily high voltage power supply inside and AC electric equipment are damaged, or even jeopardize the personal safety of operator, this problem is often
Ignored by users.It is therefore desirable to which high voltage power supply is in use, it is defeated that high voltage power supply output ground must can be abutted against Alternating Current Power Supply
Enter protecting field.How quickly as high voltage power supply is widely applied, reliable ground problem is more and more prominent, accurately judge ground connection
Situation meets user demand, becomes the task of top priority.
Invention content
In view of the actual demand of prior art situation and existing market, present invention offer is a kind of easy to use, can safely, soon
Speed, the detection circuit and detection method that accurately Alternating Current Power Supply protecting field reliable ground is judged.
The present invention to achieve the above object, is adopted the technical scheme that：A kind of Alternating Current Power Supply protecting field reliable ground is sentenced
Fixed detection circuit, it is characterised in that：Including input fire-ground wire voltage detection and control circuit, input fire-zero curve reduction voltage circuit
With output control and indicating circuit, the input fire-zero curve reduction voltage circuit is detected respectively with input fire-ground wire voltage and control electricity
Road is connected with output control and indicating circuit；
Physical circuit is connected as：In the input fire-ground wire voltage detection and control circuit, resistance R3 connects with resistance R4
In parallel with capacitance C4 afterwards, one end of capacitance C4 is drawn with the 12 of the firewire L and relay relay1 of Alternating Current Power Supply input terminal J1 respectively
Foot is connected, and the other end of capacitance C4 connects the anode of the cathode and diode D5 of rectifier diode D6, the cathode of diode D5 respectively
After being connected with the cathode of diode D7, connect the anode of capacitance C5,22 feet of relay relay1 respectively, the anode of diode D7 with
The cathode of diode D8 is connect after being connected with the protecting field G of input terminal J1, the positive phase of the anode and diode D6 of diode D8
Lian Hou, connects the cathode of capacitance C5,1 foot of relay relay1 respectively, and 11 feet of relay relay1 connect Alternating Current Power Supply input terminal
The zero curve N of J1；
In the fire-zero curve reduction voltage circuit, resistance R1 connects with resistance R2 and, capacitance C1 in parallel with capacitance C1 and capacitance C2
A termination input fire-ground wire voltage detection and control circuit repeat circuit relay1 14 feet, the other end difference of capacitance C1
The anode of the cathode and diode D3 of diode D1 is connect, the anode of diode D1 is connected with the anode of diode D2 is followed by capacitance C3
Cathode, after the cathode of diode D2 is connected with the anode of diode D4, connect in input fire-ground wire voltage detection and control circuit
9 feet of relay relay1, the cathode of diode D3 are connected the anode of capacitance C3 with the cathode of diode D4；
In the output control and indicating circuit, connect input terminal J1's after 9 feet of relay relay2 and 14 foot short circuits
11 feet of firewire L, relay relay2 are connected with diode D9 cathode, indicator light D10 anodes respectively, diode D9 anodes difference
It is connected with one end of resistance R5, indicator light D10 cathode, 12 feet of relay relay2 are connected with the firewire L ＇ of output end J2, after
1 foot of 22 feet of electric appliance relay2 and the 22 foot short circuits of relay relay3, relay relay2 connects fire-zero curve reduction voltage circuit
Middle capacitance C3 anodes, 1 foot of relay relay3 connect capacitance C3 cathode in ＂ fire-zero curve ＂ reduction voltage circuits, relay relay3
9 feet and 14 foot short circuits after the zero curve N of connection input fire-ground wire voltage detection and control circuit input terminal J1, relay
After 11 feet of relay3 and 12 foot short circuits distinguish connecting resistance R6 one end and output end J2 zero curve N ＇, the other end of resistance R6 with
The other end of resistance R5 is connected, and the G ' of output end J2 meets the protecting field G of input terminal J1.
A kind of method of the detection circuit of Alternating Current Power Supply protecting field reliable ground judgement, it is characterised in that：Detection method is such as
Under, when the disconnection of Alternating Current Power Supply protecting field or poor contact, input fire-ground wire voltage detects and control circuit is because no-voltage is defeated
Go out, voltage can not be provided for relay relay1 actuating coils, at this point, the contacts relay relay1 are failure to actuate, Alternating Current Power Supply is defeated
It is off-state to enter with output end, meanwhile, output indicator does not work；
When the connection of Alternating Current Power Supply protecting field is good, in input fire-ground wire voltage detection and control circuit, Alternating Current Power Supply
Input voltage exchanges partial pressure by capacitance C4 with capacitance C5, which can be calculated by capacitance C4, capacitance C5 capacitances exchange partial pressure
It obtains and is adjusted, after the voltage commutation and reach setting value, be added on the actuating coil of relay relay1, make its contact
Action, by exporting control and indicating circuit, Alternating Current Power Supply input and output side is conducting state, meanwhile, output indicator D10
It lights；
After relay relay1 is closed, Alternating Current Power Supply by fire-zero curve reduction voltage circuit, according to capacitance C1, capacitance C2 and
The matching of capacitance C3 capacitances obtains the voltage that relay relay2, the contacts relay relay3 can be made to act, and then controls defeated
Go out control and indicating circuit, when indicator light D10 is bright, illustrates that ground connection is reliable, there is ac output voltage, when indicator light D10 does not work, table
Show that ground connection is unreliable, output end is exported without alternating voltage.
The beneficial effects of the invention are as follows：Circuit is simple, can detect Grounding in real time, and result judgement quickly, accurately, uses
It is convenient.When user equipment can not be abutted against safety protection earth in use, circuit of the present invention can be to using equipment to be broken
Electric protection, prevents its damage, has not only ensured the reliable use of user equipment, but also can guarantee the personal safety of operator.
Description of the drawings
Fig. 1 is that the circuit of the present invention connects block diagram；
Fig. 2 is the circuit diagram of the present invention.
Specific implementation mode
As shown in Figure 1, 2, a kind of detection circuit of Alternating Current Power Supply protecting field reliable ground judgement, including input ＂ fire-ground
Line ＂ voltage detectings and control circuit, input ＂ fire-zero curve ＂ reduction voltage circuits and output control and indicating circuit.
＂ fire-zero curve ＂ reduction voltage circuits are inputted to control with input ＂ fire-ground wire ＂ voltage detectings and control circuit and output respectively
And indicating circuit is connected.
In above-mentioned input ＂ fire-ground wire ＂ voltage detectings and control circuit, resistance R3 connect with resistance R4 after with capacitance C4 simultaneously
Connection, one end of capacitance C4 are connected with 12 pins of the firewire L of Alternating Current Power Supply input terminal J1 and relay relay1 respectively, capacitance
The other end of C4 connects the anode of the cathode and diode D5 of rectifier diode D6 respectively, and the cathode of diode D5 is with diode D7's
After cathode is connected, the anode of capacitance C5,22 feet of relay relay1, the anode of diode D7 and bearing for diode D8 are connect respectively
Connect with the protecting field G of input terminal J1 after being extremely connected, diode D8 it is positive be connected with the anode of diode D6 after, connect electricity respectively
Hold the cathode of C5,1 foot of relay relay1,11 feet of relay relay1 meet the zero curve N of Alternating Current Power Supply input terminal J1；
In above-mentioned ＂ fire-zero curve ＂ reduction voltage circuits, resistance R1 connects with resistance R2 and, capacitance in parallel with capacitance C1 and capacitance C2
A termination input ＂ fire-ground wire ＂ voltage detectings of C1 and 14 feet of control circuit repeat circuit relay1, the other end of capacitance C1
The anode of the cathode and diode D3 of diode D1 is connect respectively, and the anode of diode D1 is connected with the anode of diode D2 is followed by electricity
Hold the cathode of C3, after the cathode of diode D2 is connected with the anode of diode D4, connects and input ＂ fire-ground wire ＂ voltage detectings and control
9 feet of circuit relay electric appliance relay1, the cathode of diode D3 are connected the anode of capacitance C3 with the cathode of diode D4；
Connect input terminal J1's in above-mentioned output control and indicating circuit, after 9 feet of relay relay2 and 14 foot short circuits
11 feet of firewire L, relay relay2 are connected with diode D9 cathode, indicator light D10 anodes respectively, diode D9 anodes difference
It is connected with one end of resistance R5, indicator light D10 cathode, 12 feet of relay relay2 are connected with the firewire L ＇ of output end J2, after
22 feet of electric appliance relay2 and the 22 foot short circuits of relay relay3,1 foot connection ＂ fire-zero curve ＂ decompression electricity of relay relay2
1 foot of capacitance C3 anodes in road, relay relay3 connects capacitance C3 cathode in ＂ fire-zero curve ＂ reduction voltage circuits, relay
The zero curve N of connection input ＂ fire-ground wire ＂ voltage detectings and control circuit input terminal J1 after 9 feet of relay3 and 14 foot short circuits, after
The zero curve N ＇ of one end and output end J2 of connecting resistance R6 are distinguished after 11 feet of electric appliance relay3 and 12 foot short circuits, resistance R6's is another
End is connected with the other end of resistance R5, and the G ' of output end J2 meets the protecting field G of input terminal J1.Double-pole double throw relay is selected in circuit
Device, when selection, are considered as its pressure resistance and reliability requirement.Selection for diode need to consider the reversed pressure voltage of its own,
It is DC1000V to be computed and combine design of Reducing Rating, the reversed pressure voltage of diode selected in the present invention, ensures that it is used reliable
Property.
In input ＂ fire-ground wire ＂ voltage detectings and control circuit and input ＂ fire-zero curve ＂ reduction voltage circuits, capacitance C4, electricity
Its redundancy will be considered in design by holding the pressure voltage of C1 and capacitance C2, because the step-down value on these three capacitances is higher, in reality
In circuit, the capacitance pressure voltage of selection is DC1600V.
When circuit pcb board designs, need consider real work electric current size, therefore in circuit with zero curve N and firewire L
Relevant cabling should be able to be by larger electric current, and cabling is relatively wide, while the lead-out wire selected in circuit input, output end is answered
There is larger line footpath, reduces line loss.
By the light on and off of functional indicator light D10, the reliability of Alternating Current Power Supply input protecting field ground connection can be monitored in real time, when
Automatically feeder ear is disconnected when being grounded unreliable, both ensure that the reliable use of other equipment and high voltage power supply, has been in turn ensured operation
The personal safety of person.
A kind of detection method of the detection circuit of Alternating Current Power Supply protecting field reliable ground judgement, when Alternating Current Power Supply protecting field is disconnected
It opens or when poor contact, input ＂ fire-ground wire ＂ voltage detectings and control circuit can not be relay relay1 because of Non voltage output
Actuating coil provides voltage, at this point, the contacts relay relay1 are failure to actuate, Alternating Current Power Supply input and output side is off-state,
Meanwhile output indicator does not work.
When the connection of Alternating Current Power Supply protecting field is good, in input ＂ fire-ground wire ＂ voltage detectings and control circuit, exchange supplies
Electric input voltage exchanges partial pressure by capacitance C4 with capacitance C5, which can exchange partial pressure gauge by capacitance C4, capacitance C5 capacitances
It calculates and obtains and be adjusted, after the voltage commutation and reach setting value, be added on the actuating coil of relay relay1, it is made to touch
Point action, by exporting control and indicating circuit, Alternating Current Power Supply input and output side is conducting state, meanwhile, output indicator
D10 is lighted.
After relay relay1 is closed, Alternating Current Power Supply is by ＂ fire-zero curve ＂ reduction voltage circuits, according to capacitance C1, C2 and electricity
Hold the matching of C3 capacitances, obtains the voltage that relay relay2, the contacts relay relay3 can be made to act, and then control output
Control and indicating circuit illustrate that ground connection is reliable, there is ac output voltage when indicator light D10 is bright, when indicator light D10 does not work, indicate
It is unreliable to be grounded, and output end is exported without alternating voltage.
For low-power high-voltage power supply, also it is allowed if being no more than the impedance of 10K Ω between the earth, electricity
Source also corresponds to be grounded, and will not be charged on the shell of high voltage power supply at this time, whole operation process is also safe.When impedance is super
When crossing 10K Ω or so, relay coil operating voltage reduce, the undertension so that the contacts relay relay1 act, to
It is off-state to make Alternating Current Power Supply input and output side.
Claims (2)
1. a kind of detection circuit of Alternating Current Power Supply protecting field reliable ground judgement, it is characterised in that：Including inputting fire-ground wire voltage
Detection and control circuit, input fire-zero curve reduction voltage circuit and output control and indicating circuit, the input fire-zero curve decompression electricity
Road is connected with input fire-ground wire voltage detection and control circuit and output control and indicating circuit respectively；
Physical circuit is connected as：In the detection of the input fire-ground wire voltage and control circuit, after resistance R3 connects with resistance R4 and
Capacitance C4 is in parallel, one end of capacitance C4 12 pin phases with the firewire L and relay relay1 of Alternating Current Power Supply input terminal J1 respectively
Even, the other end of capacitance C4 connects the anode of the cathode and diode D5 of rectifier diode D6, the cathode of diode D5 and two respectively
After the cathode of pole pipe D7 is connected, the anode of capacitance C5,22 feet of relay relay1, anode and two poles of diode D7 are connect respectively
The cathode of pipe D8 is connect after being connected with the protecting field G of input terminal J1, diode D8 it is positive be connected with the anode of diode D6 after,
The cathode of capacitance C5,1 foot of relay relay1 are connect respectively, and 11 feet of relay relay1 connect the zero of Alternating Current Power Supply input terminal J1
Line N；
In the fire-zero curve reduction voltage circuit, after resistance R1 connects with resistance R2 and with the capacitance C1 and capacitance C2 that are connected in parallel simultaneously
Connection, a termination input fire-ground wire voltage detection of capacitance C1 and 14 feet of control circuit repeat circuit relay1, capacitance C1's is another
One end connects the anode of the cathode and diode D3 of diode D1 respectively, after the anode of diode D1 is connected with the anode of diode D2
It connects the cathode of capacitance C3, after the cathode of diode D2 is connected with the anode of diode D4, connects input fire-ground wire voltage detection and control
9 feet of circuit relay electric appliance relay1 processed, the cathode of diode D3 are connected the anode of capacitance C3 with the cathode of diode D4；
In the output control and indicating circuit, the firewire of input terminal J1 is connected after 9 feet of relay relay2 and 14 foot short circuits
11 feet of L, relay relay2 are connected with diode D9 cathode, indicator light D10 anodes respectively, diode D9 anodes respectively with electricity
One end, the indicator light D10 cathode for hindering R5 are connected, and 12 feet of relay relay2 are connected with the firewire L ＇ of output end J2, relay
1 foot of 22 feet of relay2 and the 22 foot short circuits of relay relay3, relay relay2 connects electricity in fire-zero curve reduction voltage circuit
Hold C3 anodes, 1 foot of relay relay3 connects capacitance C3 cathode in ＂ fire-zero curve ＂ reduction voltage circuits, 9 feet of relay relay3
＂ fire-ground wire ＂ voltage detectings and the zero curve N of control circuit input terminal J1 are inputted with connection after 14 foot short circuits, relay relay3's
The other end of one end of connecting resistance R6 and zero curve the N ＇, resistance R6 of output end J2 are distinguished after 11 feet and 12 foot short circuits with resistance R5's
The other end is connected, and the G ' of output end J2 meets the protecting field G of input terminal J1.
2. a kind of detection method of detection circuit using Alternating Current Power Supply protecting field reliable ground described in claim 1 judgement,
It is characterized in that：Detection method is as follows, when the disconnection of Alternating Current Power Supply protecting field or poor contact, input fire-ground wire voltage detection
And control circuit can not provide voltage because of Non voltage output for relay relay1 actuating coils, at this point, relay relay1 is touched
Point is failure to actuate, and Alternating Current Power Supply input and output side is off-state, meanwhile, output indicator does not work；
When the connection of Alternating Current Power Supply protecting field is good, in input fire-ground wire voltage detection and control circuit, Alternating Current Power Supply input
Voltage exchanges partial pressure by capacitance C4 with capacitance C5, which can be calculated and be obtained by capacitance C4, capacitance C5 capacitances exchange partial pressure
And be adjusted, after the voltage commutation and reach setting value, be added on the actuating coil of relay relay1, keeps its contact dynamic
Make, by exporting control and indicating circuit, Alternating Current Power Supply input and output side is conducting state, meanwhile, output indicator D10 points
It is bright；
After relay relay1 is closed, Alternating Current Power Supply is by fire-zero curve reduction voltage circuit, according to capacitance C1, capacitance C2 and capacitance
The matching of C3 capacitances obtains the voltage that relay relay2, the contacts relay relay3 can be made to act, and then controls output control
System and indicating circuit illustrate that ground connection is reliable, there is ac output voltage when indicator light D10 is bright, when indicator light D10 does not work, indicate to connect
Ground is unreliable, and output end is exported without alternating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610455554.XA CN106019053B (en) | 2016-06-22 | 2016-06-22 | A kind of detection circuit and detection method of the judgement of Alternating Current Power Supply protecting field reliable ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610455554.XA CN106019053B (en) | 2016-06-22 | 2016-06-22 | A kind of detection circuit and detection method of the judgement of Alternating Current Power Supply protecting field reliable ground |
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| Publication Number | Publication Date |
|---|---|
| CN106019053A CN106019053A (en) | 2016-10-12 |
| CN106019053B true CN106019053B (en) | 2018-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610455554.XA Active CN106019053B (en) | 2016-06-22 | 2016-06-22 | A kind of detection circuit and detection method of the judgement of Alternating Current Power Supply protecting field reliable ground |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09261844A (en) * | 1996-03-19 | 1997-10-03 | Toshiba Corp | Ground fault circuit selecting relay equipment |
| CN2395449Y (en) * | 1999-11-08 | 2000-09-06 | 王天荣 | AC power filter |
| CN2788432Y (en) * | 2005-04-06 | 2006-06-14 | 李彦 | Surge restrain and electric leakage electric shock over-pressure, over-current comprehensive protector |
| CN101334442A (en) * | 2008-07-29 | 2008-12-31 | 深圳和而泰智能控制股份有限公司 | Earth wire detector |
| EP2698908A2 (en) * | 2012-08-14 | 2014-02-19 | Boltier R&D | AC-DC power supply device and switching mode power supply device |
| CN104898015A (en) * | 2015-06-27 | 2015-09-09 | 佛山市顺德万和电气配件有限公司 | Alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit |
| CN205844440U (en) * | 2016-06-22 | 2016-12-28 | 东文高压电源（天津）股份有限公司 | The testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges |
-
2016
- 2016-06-22 CN CN201610455554.XA patent/CN106019053B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09261844A (en) * | 1996-03-19 | 1997-10-03 | Toshiba Corp | Ground fault circuit selecting relay equipment |
| CN2395449Y (en) * | 1999-11-08 | 2000-09-06 | 王天荣 | AC power filter |
| CN2788432Y (en) * | 2005-04-06 | 2006-06-14 | 李彦 | Surge restrain and electric leakage electric shock over-pressure, over-current comprehensive protector |
| CN101334442A (en) * | 2008-07-29 | 2008-12-31 | 深圳和而泰智能控制股份有限公司 | Earth wire detector |
| EP2698908A2 (en) * | 2012-08-14 | 2014-02-19 | Boltier R&D | AC-DC power supply device and switching mode power supply device |
| CN104898015A (en) * | 2015-06-27 | 2015-09-09 | 佛山市顺德万和电气配件有限公司 | Alternating-current null-line and firing-line reverse connection and ground line abnormality detection circuit |
| CN205844440U (en) * | 2016-06-22 | 2016-12-28 | 东文高压电源（天津）股份有限公司 | The testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges |
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| Publication number | Publication date |
|---|---|
| CN106019053A (en) | 2016-10-12 |
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