CN2183572Y - Drain voltage inductor - Google Patents
Drain voltage inductor Download PDFInfo
- Publication number
- CN2183572Y CN2183572Y CN 93240702 CN93240702U CN2183572Y CN 2183572 Y CN2183572 Y CN 2183572Y CN 93240702 CN93240702 CN 93240702 CN 93240702 U CN93240702 U CN 93240702U CN 2183572 Y CN2183572 Y CN 2183572Y
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- ground
- voltage
- drain voltage
- ground wire
- rod
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- Expired - Fee Related
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to a drain voltage inductor which is an electric safety protecting device used for sending out an alarm and cutting off a power supply when an electric appliance is detected to bring about drain voltage. The device mainly detects that electrical potential difference of more than 6V occurs between a casing except the electric appliance and a ground where a person stands, the drain voltage inductor send out the alarm or automatically cut off the power supply to obtain the effect of electric safety protection.
Description
The utility model system is relevant for a kind of drain voltage inductor; when referring to that especially there is the above potential difference (PD) of 6V on shell and personnel are stood outside a kind of electric leakage situation of detecting consumer and the electricity consumption tool ground, control the Electrical Safety protective device that gives the alarm automatically or cut off the electricity supply.
Do not connect the object of electricity, holding charged phenomenon has following situation:
A. virtual leak: as measure the good motor of insulation with megger, when the energising running, measure the phenomenon that motor case then has voltage over the ground, does not promptly have this phenomenon after only ground wire one connects, again with also no current phenomenon of reometer amount ground wire.Ground connection was the most effective, the safest mode when this virtual leak electricity was mistaken as electric leakage in the mode of ground wire.
B. the wind-force frictional electricity, then remains at very high voltage when power failure is unearthed in kilometer over the ground as its length of transmission line of electricity, or may respond to relevant in relative loop with iron tower; Therefore, the power failure operation must be taken electric wire ground connection by every iron tower.As Bao Xian district, in 1969 Hsinchu power failure operation generation electrification accident.
C. very electric leakage: just the dielectric film of electrified body (skin) has breakage, humidity, electrolytic solution to soak and metallic dust adheres to etc., causes electric power to reach meeting the conductive material shell of consuming device, really the leaking electricity of meaning.1, the part machine is provided with the rubber crash roll; 2, part is unearthed; 3, there is the partial earth line only to rub because of machine vibration; 4, there are ground connection and ground and whole body wet as the EWH; 5,100 ohm, 50 ohm of partial earth stake resistance regulations carefully, below 10 ohm, with regard to 4,5 situations with situation the best, the electric current of electric leakage (I) is promptly tried to achieve by following formula:
Electric current (I)=200 volt/100 ohm=2.2 amperes (A)
=220 volts/50 ohm=4.4 amperes (A)
=220 volts/10 ohm=22 amperes (A)
=110 volts/100 ohm=1.1 amperes (A)
=110 volts/50 ohm=2.2 amperes (A)
=110 volts/10 ohm=11 amperes (A)
At this moment, the circuit of the no fusible disconnecting switch N.F.B. or the electromagnetic switch overwhelming majority does not have residual current circuit breaker.Suppose that electric heater, electrical equipment have leaky, just equal the resistance of one 100 ohm, 50 ohm, 10 ohm in parallel of human body, it is just safe to touch electric wire.
In the test, 220V is connect two-phase not to be had and has 6 amperes approximately when fuze isolating switch 2PNFB connects hot water copper pipe ground wire with reometer amount ground wire, its resistance value of voltage with 110V is about 18.3 ohm (stake resistance of instant heating hydrophone ground wire and the stake resistance of platform piezoelectric transformer sum totals), and the voltage of calorimetric water copper pipe and bathroom floor is exchange 110VAC again; Can be shinny between copper pipe and the ground if bulb is connected on, originally ground wire is exactly " ground wire of feeling at ease "!
Relevant residual current circuit breaker in the prior art is that the vector sum of using its leakage current is not equal to zero principle, with electronic circuit amplification drive magnetic and make the residual current circuit breaker escape; Suppose, when having rubber crash roll or ground wire to be unkitted or to rub under the machine, residual current circuit breaker surely not escape then whole of machine is charged.
Factory's iron room, coherent production line now, the pneumatics iron pipe links to each other and also makes the motor case of leakproof charged, and residual current circuit breaker is just good at last does not also have use.
The fundamental purpose of the utility model, be to solve that the vector sum with leakage current is not equal to zero principle in the prior art, make the effect of residual current circuit breaker escape with electronic circuit amplification drive magnetic, when having rubber crash roll or ground wire to be unkitted or to rub, residual current circuit breaker can escape whole charged shortcoming of electrical equipment then.
The secondary objective of the utility model; ground connection is the most effective, the safest mode when being to change mode with ground wire and being mistaken as electric leakage; between the ground that housing and personnel are stood outside the detecting consuming device electrical leakage voltage mode to take place, give the alarm immediately or cut off the electricity supply automatically to reach the effect of Electrical Safety protection.
For reaching aforementioned purpose, the utility model mainly is during as detecting electrical equipment generation electric leakage situation, the Electrical Safety protective device that gives the alarm immediately or cut off the electricity supply; During the above potential difference (PD) of generation 6V, promptly give the alarm or cut off the electricity supply automatically between the ground that housing and personnel are stood outside the main system of this device detecting consuming device.
Below by concrete embodiment, cooperate appended diagram, the utility model is done one describes in detail as the back:
Graphic explanation:
Fig. 1 is that the circuit of the utility model and consuming device connects embodiment.
See also the circuit detail drawing of Fig. 1 the utility model, its structure is: input end C is connected to the positive pole of a diode 3, and negative pole is connected to one of the X contact of switch 6 and resistance 4 end, and the other end of this resistance 4 is connected with resistance 5, the other end of this resistance 5 is ground connection then, is connected to the y contact of switch 6 in series connection place of this two resistance 4,5; And the z contact of switch 6 is connected with a variable resistor 7 and be connected in series a Zener diode 8 ground connection, and this Zener diode 8 also connects the coil 9 of a relay 12.
Seeing also Fig. 1, partly is the circuit diagram of the utility model " drain voltage inductor " at the A of Fig. 1, and the part of Figure 1B is the wiring diagram of electromagnetic switch to motor (electrical equipment), and its structure, effect illustrate now as the back:
At motor 14(or electrical equipment) when the ground wire 1 of shell had electric leakage, because of the relation of electric potential gradient, gradually far away and also gradually high with the voltage of ground wire (rod), high gradually to working power voltage over the ground from ground rod, the only tens of centimetres of its spacing were to one meter.
When electrical leakage, shell has a voltage to the earth outside the motor 14, this voltage is through diode 3 half-wave rectification (when being 110V as working power voltage over the ground), switch 6 is cut in the z position then half-wave rectification voltage reduce to 55VDC, by coil 9 dividing potential drops of variable resistor 7 with relay 12, when variable resistor 7 was adjusted, the DC voltage of coil 9 rose to 6VDC and promptly moves, and the b contact of relay 12 is opened circuit; Simultaneously, coil 15 outages of electromagnetic switch 13.The transfer of variable resistor 7 can be adjusted the voltage matches of the coil 9 of relay 12.And the operation voltage of the utility model " drain voltage inductor " is set in more than the 6V; Infield at second ground wire 2 of drain voltage inductor A, should be from first ground wire 1 be first ground wire of electric appliance casing to be connected power supply apart from determining method with an electric wire, when electricity consumption meter-pressing amount desire was adorned the ground of second ground rod and the magnitude of voltage between first ground rod and equaled over the ground magnitude of voltage of power supply again, this ground, place can device second ground wire 2 and the ground rod.
If when working power voltage over the ground is 220V, then switch 6 is cut to the y position, then the direct current after diode 3 half-wave rectification also can get the same result through resistance 4, dividing potential drop.
From the above, during the utility model detecting electrical equipment generation electric leakage situation, give the alarm immediately or cut off the Electrical Safety protective device of institute's power supply, practical value is high.
Claims (6)
1, a kind of drain voltage inductor, the electrical leakage voltage of shell to the first ground wire (rod) outside the electrical equipment of it is characterized in that leaking electricity is connected to the positive pole of a diode through input end, its negative pole is connected to one of the x contact of a switch and resistance 4 end, and the other end of this resistance 4 is connected with resistance 5, the other end of this resistance 5 then is grounded to second ground wire (rod), is connected to the y contact of switch in series connection place of this two resistance 4,5; And the z contact of switch is connected with a variable resistor of adjusting the coil matching voltage of relay and is connected in series a Zener diode in second ground wire (rod), the coil of this Zener diode relay in parallel.
2, drain voltage inductor according to claim 1, it is characterized in that the decision of the second ground wire infield of this drain voltage inductor, be after with electric wire first ground wire (rod) being connect power supply, when the magnitude of voltage of adorning second ground wire (rod) ground with voltage table flow control one ground wire (rod) and desire equaled over the ground magnitude of voltage of power supply, this ground, place can device second ground wire and ground rod.
3, drain voltage inductor according to claim 1 is characterized in that the operation voltage of this drain voltage inductor is set in more than the 6V.
4, drain voltage inductor according to claim 1, but it is characterized in that the proper resistor value of selection build-out resistor of the working power voltage mat switch over the ground of this drain voltage inductor, and can adapt to the working voltage to ground of difference.
5, drain voltage inductor according to claim 1 is characterized in that the Zener diode of this drain voltage inductor protective relay coil voltage being stable at 6V.
6, drain voltage inductor according to claim 1 is characterized in that and Zener diode and the coil that connects, also can be used as the escape master accessory of isolating switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93240702 CN2183572Y (en) | 1993-10-04 | 1993-10-04 | Drain voltage inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93240702 CN2183572Y (en) | 1993-10-04 | 1993-10-04 | Drain voltage inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2183572Y true CN2183572Y (en) | 1994-11-23 |
Family
ID=33814881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93240702 Expired - Fee Related CN2183572Y (en) | 1993-10-04 | 1993-10-04 | Drain voltage inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2183572Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656010A (en) * | 2013-11-15 | 2015-05-27 | 西门子公司 | Current leakage protection device detection system and detection method thereof |
| CN105024345A (en) * | 2015-07-08 | 2015-11-04 | 福建省轻安工程建设有限公司 | Construction temporary power utilization control device |
-
1993
- 1993-10-04 CN CN 93240702 patent/CN2183572Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104656010A (en) * | 2013-11-15 | 2015-05-27 | 西门子公司 | Current leakage protection device detection system and detection method thereof |
| CN105024345A (en) * | 2015-07-08 | 2015-11-04 | 福建省轻安工程建设有限公司 | Construction temporary power utilization control device |
| CN105024345B (en) * | 2015-07-08 | 2017-12-05 | 福建省轻安工程建设有限公司 | One kind construction temporary electricity control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |