CN205844440U - The testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges - Google Patents
The testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges Download PDFInfo
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- CN205844440U CN205844440U CN201620621159.XU CN201620621159U CN205844440U CN 205844440 U CN205844440 U CN 205844440U CN 201620621159 U CN201620621159 U CN 201620621159U CN 205844440 U CN205844440 U CN 205844440U
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Abstract
This utility model relates to the testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges.Controlling and indicating circuit including input ＂ fire ground wire ＂ voltage detecting and control circuit, input ＂ fire zero line ＂ reduction voltage circuit and output, input ＂ fire zero line ＂ reduction voltage circuit is connected with input ＂ fire ground wire ＂ voltage detecting and control circuit and output control and indicating circuit respectively.The beneficial effects of the utility model are: circuit is simple, can detect Grounding in real time, and result judges quick, accurate, easy to use.When subscriber equipment does not in use have can be abutted against safety protection earth, this utility model circuit can give power-off protection to use equipment, prevent it from damaging, and has both ensured the reliable use of subscriber equipment, can guarantee that again the personal safety of operator.
Description
Technical field
This utility model relates to a kind of in the fields such as medical treatment, industry, environmental protection, for widely used various high voltage power supplies
Alternating Current Power Supply protecting field reliable ground judge testing circuit.
Background technology
The high voltage power supply used in many applications, its output voltage is the highest, about at more than 20KV, as
Really high voltage power supply output ground does not connect Alternating Current Power Supply input protecting field, then output high pressure is suspended state relative to the earth, holds very much
Easily high voltage power supply inside and AC electric equipment being caused damage, even jeopardize the personal safety of operator, this problem is often
Ignored by users.It is therefore desirable to 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.Along with high voltage power supply is widely applied, reliable ground problem is more and more prominent, the most quickly, accurately judges ground connection
Situation, meets user's request, becomes the task of top priority.
Summary of the invention
In view of prior art situation and the actual demand of existing market, this utility model provides a kind of easy to use, can pacify
Entirely, quickly, the testing circuit accurately Alternating Current Power Supply protecting field reliable ground judged.
This utility model for achieving the above object, is adopted the technical scheme that: a kind of Alternating Current Power Supply protecting field can be abutted against
The testing circuit that ground judges, it is characterised in that: include inputting fire-ground wire voltage detection and control circuit, input fire-zero line blood pressure lowering
Circuit and output control and indicating circuit, and described input fire-zero line reduction voltage circuit detects and control with input fire-ground wire voltage respectively
Circuit processed controls with output and indicating circuit is connected；
Physical circuit is connected as: in described input fire-ground wire voltage detection and control circuit, resistance R3 connects with resistance R4
In parallel with electric capacity C4 afterwards, one end of electric capacity C4 12 drawing with the live wire L and relay relay1 of Alternating Current Power Supply input J1 respectively
Foot is connected, and the other end of electric capacity C4 connects negative pole and the positive pole of diode D5 of commutation diode D6, the negative pole of diode D5 respectively
After being connected with the negative pole of diode D7, connect 22 feet of the positive pole of electric capacity C5, relay relay1 respectively, the positive pole of diode D7 with
The negative pole of diode D8 is connected with the protecting field G of input J1 after being connected, the positive pole phase of the positive pole of diode D8 and diode D6
Lian Hou, connects 1 foot of the negative pole of electric capacity C5, relay relay1 respectively, and 11 feet of relay relay1 connect Alternating Current Power Supply input
The zero line N of J1；
In described fire-zero line reduction voltage circuit, resistance R1 connects with resistance R2 and in parallel with electric capacity C1 and electric capacity C2, electric capacity C1
Termination input fire-ground wire voltage detection and 14 feet of control circuit repeat circuit relay1, the other end of electric capacity C1 is respectively
Connecing negative pole and the positive pole of diode D3 of diode D1, the positive pole of diode D1 is connected with the positive pole of diode D2 and is followed by electric capacity C3
Negative pole, after the negative pole of diode D2 is connected with the positive pole of diode D4, connect in the detection of input fire-ground wire voltage and control circuit
The negative pole of 9 feet of relay relay1, the negative pole of diode D3 and diode D4 is connected the positive pole of electric capacity C3；
Described output controls and in indicating circuit, connects input J1's after 9 feet of relay relay2 and 14 foot short circuits
11 feet of live wire L, relay relay2 are connected with diode D9 negative pole, display lamp D10 positive pole respectively, and diode D9 positive pole is respectively
Being connected with one end, the display lamp D10 negative pole of resistance R5,12 feet of relay relay2 are connected with the live wire L ＇ of outfan J2, continue
22 feet of electrical equipment relay2 and the 22 foot short circuits of relay relay3,1 foot of relay relay2 connects fire-zero line reduction voltage circuit
Middle electric capacity C3 positive pole, 1 foot of relay relay3 connects electric capacity C3 negative pole in fire-zero line reduction voltage circuit, the 9 of relay relay3
Input fire-ground wire voltage detection and the zero line N of control circuit input J1 is connected after foot and 14 foot short circuits, relay relay3's
Distinguishing one end and the zero line N ＇ of outfan J2 of connecting resistance R6 after 11 feet and 12 foot short circuits, the other end of resistance R6 is with resistance R5's
The other end is connected, and the G ' of outfan J2 meets the protecting field G of input J1.
The beneficial effects of the utility model are: circuit is simple, can detect Grounding in real time, and result judges quick, accurate,
Easy to use.When subscriber equipment does not in use have can be abutted against safety protection earth, use can be set by this utility model circuit
For giving power-off protection, prevent it from damaging, both ensured the reliable use of subscriber equipment, can guarantee that again the personal safety of operator.
Accompanying drawing explanation
Fig. 1 is that circuit of the present utility model connects block diagram；
Fig. 2 is circuit theory diagrams of the present utility model.
Detailed description of the invention
As shown in Figure 1, 2, the testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges, including input ＂ fire-ground
Line ＂ voltage detecting and control circuit, input ＂ fire-zero line ＂ reduction voltage circuit and output control and indicating circuit.
Input ＂ fire-zero line ＂ reduction voltage circuit controls with input ＂ fire-ground wire ＂ voltage detecting and control circuit and output respectively
And indicating circuit is connected.
In above-mentioned input ＂ fire-ground wire ＂ voltage detecting and control circuit, resistance R3 connect with resistance R4 after with electric capacity C4 also
Connection, one end of electric capacity C4 12 pins with the live wire L and relay relay1 of Alternating Current Power Supply input J1 respectively are connected, electric capacity
The other end of C4 connects negative pole and the positive pole of diode D5 of commutation diode D6 respectively, and the negative pole of diode D5 is with diode D7's
After negative pole is connected, connecing 22 feet of the positive pole of electric capacity C5, relay relay1 respectively, the positive pole of diode D7 is negative with diode D8's
It is connected with the protecting field G of input J1 after being extremely connected, after the positive pole of diode D8 is connected with the positive pole of diode D6, connects electricity respectively
Holding the negative pole of C5,1 foot of relay relay1,11 feet of relay relay1 meet the zero line N of Alternating Current Power Supply input J1；
In above-mentioned ＂ fire-zero line ＂ reduction voltage circuit, resistance R1 connects with resistance R2 and in parallel with electric capacity C1 and electric capacity C2, electric capacity
One termination input ＂ fire-ground wire ＂ voltage detecting and 14 feet of control circuit repeat circuit relay1, the other end of electric capacity C1 of C1
Connecing negative pole and the positive pole of diode D3 of diode D1 respectively, the positive pole of diode D1 is connected with the positive pole of diode D2 and is followed by electricity
Hold the negative pole of C3, after the negative pole of diode D2 is connected with the positive pole of diode D4, connect input ＂ fire-ground wire ＂ voltage detecting and control
The negative pole of 9 feet of circuit relay electrical equipment relay1, the negative pole of diode D3 and diode D4 is connected the positive pole of electric capacity C3；
In above-mentioned output control and indicating circuit, after 9 feet of relay relay2 and 14 foot short circuits, connect input J1's
11 feet of live wire L, relay relay2 are connected with diode D9 negative pole, display lamp D10 positive pole respectively, and diode D9 positive pole is respectively
Being connected with one end, the display lamp D10 negative pole of resistance R5,12 feet of relay relay2 are connected with the live wire L ＇ of outfan J2, continue
22 feet of electrical equipment relay2 and the 22 foot short circuits of relay relay3,1 foot of relay relay2 connects ＂ fire-zero line ＂ blood pressure lowering electricity
Electric capacity C3 positive pole in road, 1 foot of relay relay3 connects electric capacity C3 negative pole in ＂ fire-zero line ＂ reduction voltage circuit, relay
Connect input ＂ fire-ground wire ＂ voltage detecting and the zero line N of control circuit input J1 after 9 feet of relay3 and 14 foot short circuits, continue
Another of respectively the zero line N ＇, resistance R6 of one end of connecting resistance R6 and outfan J2 after 11 feet of electrical equipment relay3 and 12 foot short circuits
End is connected with the other end of resistance R5, and the G ' of outfan J2 meets the protecting field G of input J1.Circuit is selected DPDT relay
Device, is considered as its pressure and reliability requirement during selection.For the selection of diode, the reverse pressure voltage of himself need to be considered,
Being computed and combine design of Reducing Rating, the diode reverse pressure voltage selected in this utility model is DC1000V, it is ensured that it uses
Reliability.
In input ＂ fire-ground wire ＂ voltage detecting and control circuit and input ＂ fire-zero line ＂ reduction voltage circuit, electric capacity C4, electricity
The pressure voltage holding C1 and electric capacity C2 to consider its redundancy, because the blood pressure lowering value on these three electric capacity is higher, in reality when design
In circuit, the electric capacity pressure voltage of selection is DC1600V.
When circuit pcb board designs, need consider real work electric current size, therefore in circuit with zero line N and live wire L
Relevant cabling should be able to be by bigger electric current, and cabling is relatively wide, and the lead-out wire simultaneously selected at circuit input, outfan should
There is bigger line footpath, reduce 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 disconnect feeder ear when ground connection is unreliable, both ensure that the reliable use of other equipment and high voltage power supply, and in turn ensure that operation
The personal safety of person.
The detection method of the testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges, when Alternating Current Power Supply protecting field breaks
Opening or during loose contact, input ＂ fire-ground wire ＂ voltage detecting and control circuit are because of Non voltage output, it is impossible to for relay relay1
Actuating coil provides voltage, and now, relay relay1 is failure to actuate contact, and Alternating Current Power Supply input and output side is off-state,
Meanwhile, output indicator does not works.
When Alternating Current Power Supply protecting field connects good, in input ＂ fire-ground wire ＂ voltage detecting and control circuit, exchange supplies
Electricity input voltage exchanges dividing potential drop by electric capacity C4 with electric capacity C5, and this voltage can pass through electric capacity C4, electric capacity C5 capacitance exchange differential pressure gauge
Calculate to obtain and be also adjusted, after this voltage commutation and reach setting value, be added on the actuating coil of relay relay1 so that it is touch
Point action, by output control and indicating circuit, Alternating Current Power Supply input and output side is conducting state, meanwhile, output indicator
D10 lights.
After relay relay1 closes, Alternating Current Power Supply passes through ＂ fire-zero line ＂ reduction voltage circuit, according to electric capacity C1, C2 and electricity
Hold the coupling of C3 capacitance, it is thus achieved that relay relay2, the voltage of relay relay3 contact action can be made, and then control output
Control and indicating circuit, when display lamp D10 is bright, illustrate that ground connection is reliable, have ac output voltage, when display lamp D10 does not works, represent
Ground connection is unreliable, and outfan exports without alternating voltage.
For low-power high-voltage power supply, and if to be no more than the impedance of 10K Ω between the earth be also to allow, electricity
Source also corresponds to ground connection, now also will not be charged on the shell of high voltage power supply, and whole operating process is also safe.When impedance surpasses
When crossing 10K about Ω, relay coil running voltage reduces, this undertension so that relay relay1 contact action, thus
Making Alternating Current Power Supply input and output side is off-state.
Claims (1)
1. the testing circuit that an Alternating Current Power Supply protecting field reliable ground judges, it is characterised in that: include fire-ground wire voltage detection
And control circuit, input fire-zero line reduction voltage circuit and output control and indicating circuit, described input fire-zero line reduction voltage circuit divides
Not it is not connected with input fire-ground wire voltage detection and control circuit and output control and indicating circuit；
Physical circuit is connected as: in the detection of described input fire-ground wire voltage and control circuit, after resistance R3 connects with resistance R4 and
Electric capacity C4 is in parallel, one end of electric capacity C4 respectively with the 12 pin phases of the live wire L and relay relay1 of Alternating Current Power Supply input J1
Even, the other end of electric capacity C4 meets negative pole and the positive pole of diode D5 of commutation diode D6, the negative pole of diode D5 and two respectively
After the negative pole of pole pipe D7 is connected, connect 22 feet of the positive pole of electric capacity C5, relay relay1 respectively, the positive pole of diode D7 and two poles
The negative pole of pipe D8 is connected with the protecting field G of input J1 after being connected, after the positive pole of diode D8 is connected with the positive pole of diode D6,
Connecing 1 foot of the negative pole of electric capacity C5, relay relay1 respectively, 11 feet of relay relay1 meet the zero of Alternating Current Power Supply input J1
Line N；
In described fire-zero line reduction voltage circuit, resistance R1 connects with resistance R2 and in parallel with electric capacity C1 and electric capacity C2, the one of electric capacity C1
Termination input ＂ fire-ground wire ＂ voltage detecting and 14 feet of control circuit repeat circuit relay1, the other end of electric capacity C1 connects respectively
The positive pole of the negative pole of diode D1 and the positive pole of diode D3, the positive pole of diode D1 and diode D2 is connected and is followed by electric capacity C3's
After the positive pole of negative pole, the negative pole of diode D2 and diode D4 is connected, connect input fire-ground wire voltage detection and control circuit relaying
The negative pole of 9 feet of electrical equipment relay1, the negative pole of diode D3 and diode D4 is connected the positive pole of electric capacity C3；
Described output controls and in indicating circuit, connects the live wire of input J1 after 9 feet of relay relay2 and 14 foot short circuits
11 feet of L, relay relay2 are connected with diode D9 negative pole, display lamp D10 positive pole respectively, diode D9 positive pole respectively with electricity
Resistance one end of R5, display lamp D10 negative pole are connected, and 12 feet of relay relay2 are connected with the live wire L ＇ of outfan J2, relay
22 feet of relay2 and the 22 foot short circuits of relay relay3,1 foot of relay relay2 connects electricity in fire-zero line reduction voltage circuit
Holding C3 positive pole, 1 foot of relay relay3 connects electric capacity C3 negative pole in fire-zero line reduction voltage circuit, 9 feet of relay relay3 with
Input fire-ground wire voltage detection and the zero line N of control circuit input J1,11 feet of relay relay3 are connected after 14 foot short circuits
With respectively one end of connecting resistance R6 and the zero line N ＇ of outfan J2 after 12 foot short circuits, another of the other end of resistance R6 and resistance R5
End is connected, and the G ' of outfan J2 meets the protecting field G of input J1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620621159.XU CN205844440U (en) | 2016-06-22 | 2016-06-22 | The testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620621159.XU CN205844440U (en) | 2016-06-22 | 2016-06-22 | The testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205844440U true CN205844440U (en) | 2016-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620621159.XU Expired - Fee Related CN205844440U (en) | 2016-06-22 | 2016-06-22 | The testing circuit that a kind of Alternating Current Power Supply protecting field reliable ground judges |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205844440U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019053A (en) * | 2016-06-22 | 2016-10-12 | 东文高压电源（天津）股份有限公司 | AC power supply protection earth reliable earthing judgment detection circuit and detection method |
-
2016
- 2016-06-22 CN CN201620621159.XU patent/CN205844440U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019053A (en) * | 2016-06-22 | 2016-10-12 | 东文高压电源（天津）股份有限公司 | AC power supply protection earth reliable earthing judgment detection circuit and detection method |
| CN106019053B (en) * | 2016-06-22 | 2018-08-28 | 东文高压电源（天津）股份有限公司 | A kind of detection circuit and detection method of the judgement of Alternating Current Power Supply protecting field reliable ground |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20190622 |