CN105990818A - Leakage circuit breaker - Google Patents
Leakage circuit breaker Download PDFInfo
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- CN105990818A CN105990818A CN201510079592.5A CN201510079592A CN105990818A CN 105990818 A CN105990818 A CN 105990818A CN 201510079592 A CN201510079592 A CN 201510079592A CN 105990818 A CN105990818 A CN 105990818A
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- Prior art keywords
- circuit
- voltage
- zener diode
- leakage
- overvoltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems
Abstract
The purpose of the present invention is to provide a leakage circuit breaker, which can prevent a built-in power circuit from breakdown by cutting off the leakage circuit breaker even in a condition such as a voltage withstand testing in which overvoltage is applied on an AC circuit continuously. The leakage circuit breaker of the present invention comprises: a rectification circuit for converting an AC voltage supplied from a AC circuit (1) to a DC voltage; a second constant voltage circuit (53) of stepping down the voltage output from the rectification circuit; a second zener diode (54) for detecting overvoltage from the output voltage of the rectification circuit; a second resistor (55) for stepping up the output voltage of the second constant voltage circuit (53) while the overvoltage is detected by the second zener diode (54); a third zener diode (56) for absorbing surge current while the output voltage of the second constant voltage circuit (53) reaches to a first predetermined value; and a overvoltage detection circuit (9) for detecting whether the output voltage of the second constant voltage circuit (23) reaches to the predetermined value so as to activate a tripping device.
Description
Technical field
The present invention relates to a kind of leakage current at circuit become greater than or equal to setting time should
The RCCB that circuit disconnects, particularly relates to the action power of RCCB.
Background technology
It is built in the power circuit in this RCCB, will supply from alternating current circuit
After alternating voltage (such as AC100V) utilizes rectification circuit to be transformed to DC voltage, by whole
DC voltage after stream utilizes reduction voltage circuit to be transformed to the DC voltage of more low-voltage (such as,
DC24V), as driving power supply to supply to electric-leakage detection circuit, tripgear.
In such power circuit, due to thunderbolt, arcing ground (arcing in alternating current circuit
Etc. ground), in the case of inducing surge voltage (surge voltage), protection is needed
Electric-leakage detection circuit, tripgear affect from this surge voltage.
As this protected location, it is known that a kind of power circuit (for example, referring to patent documentation 1),
It is provided with voltage detecting circuit, and it detects surge voltage according to the output voltage of rectification circuit；
Booster circuit, it, when this voltage detecting circuit detects surge voltage, makes the defeated of reduction voltage circuit
Go out boost in voltage；And current sink circuit, it is arranged on the outlet side of reduction voltage circuit, in fall
When the output voltage of volt circuit reaches the value of regulation, absorb surge current (surge current).
Patent documentation 1: Japanese Unexamined Patent Publication 2009-95125 publication
In the power circuit of existing RCCB, inducing the situation of surge voltage
Under, utilize booster circuit to make the output voltage of reduction voltage circuit boost, at the output electricity of reduction voltage circuit
Pressure reaches to make electric current pass through from the current sink circuit absorbing surge current during the value of regulation, thus
Be clamped (clamp) at constant voltage, prevent the parts constituting electric-leakage detection circuit due to
Overvoltage and break down.It is contemplated that pulse (pulse) width of surge voltage
Big the most just for a few m seconds.Certainly, for reduction voltage circuit, current sink circuit can be passed through
There is boundary in energy, therefore in the case of being applied continuously in overvoltage, beyond the mark,
Cause the fault of reduction voltage circuit, current sink circuit.
Can consider the case when, i.e. as the above-mentioned probability being applied continuously in overvoltage,
In panel at lift-launch RCCB etc., in order to confirm to comprise the alternating current of RCCB
Between alternate and alternating current circuit and the earth (earth) (ground (earth)) on road absolutely
Edge, implements pressure test (such as, 2000V 1 minute).
Generally, in the case of connecting electronic circuit on circuit as RCCB,
Forbid carrying out alternate pressure test, only implement resistance between alternating current circuit and the earth (earth)
Pressure test.Therefore, there is not the situation in alternate applying overvoltage.But, as it is shown in fig. 7,
If sometimes connecting on RCCB and having load circuit, then via the device connected between the earth
Part (such as, surge absoption electricity container, noise filter (Noise filter) etc.), electricity
The direct capacitance over the ground of line and unexpectedly in the alternate overvoltage that is applied continuously in, its result, electric leakage is disconnected
The power circuit of road device produces fault.
Summary of the invention
The present invention is contemplated to solve problem as above and propose, it is therefore an objective to obtain one
Plant the applying for continuous print overvoltage and there is the RCCB of defencive function.
The RCCB of the present invention possesses: opening and closing contact, and it makes connecting and disconnecting of the circuit；Leakage current
Detector, the leakage current of circuit is detected by it；Electric-leakage detection circuit, itself and this leakage current
Detector connects, and electric leakage is detected by detection signal based on leakage meter；Tripping operation dress
Putting, it is driven by this electric-leakage detection circuit, makes opening and closing contact separation；And power circuit, its
Being made up of reduction voltage circuit, voltage detecting circuit and booster circuit, wherein, this reduction voltage circuit will
From the electric power that electric power blood pressure lowering is constant voltage of circuit supply, this voltage detecting circuit is to from circuit
Overvoltage detects, and this booster circuit makes fall when this voltage detecting circuit detects overvoltage
The output voltage boosting of volt circuit；Current sink circuit, it is arranged on the outlet side of power circuit,
Output voltage at power circuit reaches to absorb surge current during 1 setting；And overvoltage
Testing circuit, it is arranged on the outlet side of power circuit, and the output voltage at power circuit exceedes
In the case of 2nd setting, driving tripgear, wherein, the 2nd setting is than power supply electricity
The rated voltage on road is high and lower than the 1st setting.
The effect of invention
Due to the fact that and utilize the overvoltage detection circuit that continuous print overvoltage is detected to make
Opening and closing contact separation, therefore, it is possible to prevent the leakage, breaking caused because of the applying of continuous print overvoltage
The fault of device.
Accompanying drawing explanation
Fig. 1 is the RCCB representing the power circuit that make use of embodiments of the present invention 1
Circuit diagram.
Fig. 2 is the circuit diagram of an example of the details representing the integrating circuit shown in Fig. 1.
Fig. 3 is the leakage, breaking representing the power circuit that make use of embodiments of the present invention 2
The circuit diagram of device.
Fig. 4 is the block diagram of an example of the details representing the electric-leakage detection circuit shown in Fig. 3.
Fig. 5 is the direct current representing the power circuit that make use of embodiments of the present invention 3
The circuit diagram of RCCB.
Fig. 6 is the direct current representing the power circuit that make use of embodiments of the present invention 4
The circuit diagram of RCCB.
Fig. 7 is in the case of existing RCCB is arranged in panel by utilization
The explanatory diagram of problem of the circuit diagram explanation present invention.
The explanation of label
1 alternating current circuit, 2 opening and closing contacts, 3 zero phase sequence currenttransformers, 4 tripgears, 4a jump
Brake cable circle, 4b tripping mechanism, 5 power circuits, 51 current-limiting resistances, 52 rectification circuits,
53 the 2nd constant voltage circuits, 53a field-effect transistor (FET), 53b the 1st Zener two pole
Pipe, 53c the 1st resistance, 54 the 2nd Zener diodes, 55 the 2nd resistance, 56 the 3rd neat
Receive diode, 6 electric-leakage detection circuits, 7 the 1st constant voltage circuits, 8 switch elements, 9 mistakes
Voltage detecting circuit, 9a the 4th Zener diode, 9b integrating circuit, 9c comparison circuit,
100 RCCBs.
Detailed description of the invention
Embodiment 1.
Fig. 1 is the RCCB representing the power circuit that make use of embodiments of the present invention 1
The circuit diagram of structure, Fig. 2 is an example of the details representing the integrating circuit shown in Fig. 1
Circuit diagram.
In FIG, RCCB 100 has: opening and closing contact 2, and it makes alternating current circuit 1
Break-make；Electric-leakage detection circuit 6, it is with the zero phase sequence currenttransformer 3 being inserted in alternating current circuit 1 i.e.
Leakage meter connects, and electric leakage is carried out by detection signal based on this zero phase sequence currenttransformer 3
Detection；Tripgear 4, it has breaking coil 4a and tripping mechanism 4b, wherein, this jumping
Brake cable circle 4a is according to the output signal of this electric-leakage detection circuit 6, via switch (switching)
Unit 8 and produce electromotive force, this tripping mechanism 4b encourages at this breaking coil (trip coil) 4a
During magnetic, split closed contact 2 carries out separating driving；And power circuit 5, it is to electric-leakage detection circuit
6 and tripgear 4 both sides power.
The alternating voltage inputted from alternating current circuit 1 is transformed to the unidirectional current of regulation by power circuit 5
Press and supply exciting current to breaking coil 4a, and utilize the 1st constant voltage circuit 7 to be transformed to ratio
The assigned voltage that the output voltage of power circuit 5 is low, supplies to electric-leakage detection circuit 6.
Hereinafter, the details of power circuit 5 are described.
This power circuit 5 is connected with alternating current circuit 1, i.e. limits at the current-limiting resistance 51 limiting electric current
The back segment of current circuit connects the rectification being made up of diode full-bridge circuit (full diode bridge)
Circuit 52 i.e. rectification circuit.Outlet side at this rectification circuit 52 connects makes its output voltage
The 2nd i.e. reduction voltage circuit of constant voltage circuit 53 of blood pressure lowering, the 2nd constant voltage circuit 53 is by with lower component
Constitute: field-effect transistor (field effect transistor) (following, to be denoted as FET) 53a,
Its drain electrode (drain) is connected with the output cathode side of rectification circuit 52；1st Zener diode
(Zener diode) 53b, its grid (gate) being connected to FET 53a and rectification circuit 52
Output negative pole side between；And the 1st resistance 53c (resistance value is hundreds of k～a few M about Ω),
It is connected to the drain electrode of FET 53a to the 1st Zener diode 53b supply Zener current and grid
Between pole.
On the 1st resistance 53c of the 2nd constant voltage circuit 53, it is connected in parallel to the 2nd Zener two pole
Pipe 54 (output voltage of Zener voltage ＞ rectification circuit 52) i.e. voltage detecting circuit, utilizing should
2nd Zener diode 54, detects surge voltage according to the output voltage of rectification circuit 52.
Between the grid and the output negative pole side of rectification circuit 52 of FET 53a, connection has neat with the 1st
The 2nd resistance 55 (resistance value is tens～hundreds of about Ω) that the diode 53b that receives is connected in series
I.e. booster circuit, when the 2nd Zener diode 54 detects surge voltage, utilizes the 2nd electricity
Resistance 55 makes the output voltage of the 2nd constant voltage circuit 53 rise.Source electrode and rectification at FET 53a
Between the output negative pole side of circuit 52, connect and have the 3rd i.e. electric current of Zener diode 56 to absorb electricity
Road, the output voltage in the 2nd constant voltage circuit 53 reaches the Zener electricity of the 3rd Zener diode 56
During i.e. 1 setting of pressure, the 3rd Zener diode 56 is utilized to absorb surge current.
It addition, the outfan at power circuit 5 is provided with overvoltage detection circuit 9, this is the most electric
Pressure testing circuit 9 is connected in parallel with the 3rd Zener diode 56, if continued from alternating current circuit 1
Input overvoltage until reaching the stipulated time, then drives tripgear 4.
Overvoltage detection circuit 9 is made up of components described below: the 4th Zener diode 9a is (such as,
Zener voltage is about 23V), the negative electrode of its negative electrode and the 3rd Zener diode 56 connects,
The output voltage of the 2nd constant voltage circuit 53 turns on more than during 2 setting；Integrating circuit 9b, its
The anode of input and the 4th Zener diode 9a and the anode of the 3rd Zener diode 56
Connect；And comparison circuit 9c, it exceedes setting, i.e. electricity to the output of this integrating circuit 9b
The output voltage of source circuit 5 reaches the output voltage of the 2nd assigned voltage and power circuit 5 and reaches
The time of the 2nd assigned voltage exceed schedule time (such as, 20msec) detect, and drive
Dynamic switch element 8.
As in figure 2 it is shown, integrating circuit 9b is made up of components described below: (resistance value is resistance 9b1
1k Ω～10k about Ω), its one end is connected with the anode of the 4th Zener diode 9a；Capacitor
9b2 (capacity is 0.1 μ F～a few μ about F), its one end is connected with the other end of this resistance 9b1,
And the anode of the other end of this capacitor 9b2 and the 3rd Zener diode 56 connects；And resistance
9b3 (resistance value is 1k Ω～10k about Ω), it is connected in parallel with this capacitor 9b2, and
And two ends are connected with comparison circuit 9c.Here, resistance 9b3 is for disconnecting at capacitor 9b2
Time make the parts of charge discharge of capacitor 9b2.
Further, the outfan at power circuit 5 also connects tripgear the 4 and the 1st constant voltage electricity
Road 7.
Additionally, the 1st Zener diode 53b is arranged on the gate electrode side of FET 53a, the 2nd resistance
The 55 output negative pole sides being arranged on rectification circuit 52, but can be to set in the gate electrode side of FET 53a
Put the 2nd resistance 55, the 1st Zener diode 53b is set in the output negative pole side of rectification circuit 52.
Action is described below.
In the normal state, if supply the friendship of about AC100V～400V from alternating current circuit 1
Stream voltage, then flow through alternating current Ia in current-limiting resistance 51, be transformed to by rectification circuit 52
DC voltage Vb.By the electric current Ib exported from rectification circuit 52, via the 1st resistance 53c
Electric current Ic is flow through in the 1st Zener diode 53b and the 2nd resistance 55.On the other hand, by
Higher than the output voltage Vb of rectification circuit 52 in the Zener voltage of the 2nd Zener diode 54, because of
This, the 2nd Zener diode 54 is not turned on, electric current will not via the 2nd Zener diode 54 to
1st Zener diode 53b and 2 resistance 55 flow.
Now, the resistance value of the 1st resistance 53c arrives greatly hundreds of k～a few M Ω, corresponding thereto,
The resistance value of 2 resistance 55 is little to tens～hundreds of Ω, the electric current therefore flow through from the 2nd resistance 55
Ic is substantially determined by the 1st resistance 53c, the least to tens μ A～hundreds of μ A.Therefore,
Can substantially ignore the voltage drop of the 2nd resistance 55.Thus, if the 2nd resistance 55 will be applied to
It is set to Vc, then with the voltage (grid voltage of FET 53a) on the 1st Zener diode 53b
Become Vc ≈ (Zener voltage of the 1st Zener diode 53b).
It addition, the output voltage Vd of the 2nd constant voltage circuit 53 be Vd=Vc-(FET 53a's
Conducting voltage), but as it was previously stated, Vc ≈ (Zener voltage of the 1st Zener diode 53b),
Therefore, Vd ≈ (Zener voltage of the 1st Zener diode 53b)-(FET 53a's is become
Conducting voltage), it is the rated voltage of power circuit 5.
Here, if setting the conducting voltage of FET 53a as about 3V, the 1st Zener diode
The Zener voltage of 53b is about 24V, then the output voltage Vd of the 2nd constant voltage circuit 53 becomes
Vd ≈ about 24V-3V=21V.
If it addition, set the Zener voltage of the 3rd Zener diode 56 as about 24V, then executed
The voltage Vd adding to the 3rd Zener diode 56 is about 21V and less than the 3rd Zener two pole
The Zener voltage of pipe 56.Thus, the 3rd Zener diode 56 is not turned on, without flow through electric current Id.
If it addition, setting Zener voltage that is the 2nd setting of the 4th Zener diode 9a as 23V
Left and right, then apply to the voltage Vd of the 4th Zener diode 9a be about 21V, therefore the 4th
Zener diode 9a is also not turned on.
Its result, from the outfan of power circuit 5 to breaking coil 4a and the 1st constant voltage circuit
7 power supply DC about 21V, the output voltage of power circuit 5 is dropped by the 1st constant voltage circuit 7
The constant voltage (such as DC 5V) pressed and electric-leakage detection circuit 6 supply is specified.
Under such power supply state, in the case of leaking electricity in alternating current circuit 1, zero
The output of phase sequence currenttransformer 3 produces signal, determines zero if, with electric-leakage detection circuit 6
The output signal level of phase sequence currenttransformer 3 has exceeded the reference value of regulation, then leakage tripping believed
Number output to switch element 8.Switch element 8 is connected, from power circuit 5 warp due to this output
Exciting current is flow through to breaking coil 4a by switch element 8, tripping mechanism 4b action, thus,
Disconnect opening and closing contact 2.
Additionally, " the 1st setting " described in claims refers to the 3rd above-mentioned Zener
The Zener voltage of diode 56, in the same manner, " the 2nd setting " described in claims
Refer to the Zener voltage of the 4th above-mentioned Zener diode 9a.
Below, the feelings of instantaneous surge voltage to superposition on the alternating voltage in alternating current circuit
Condition illustrates.
If the surge voltage of a few kV of superposition on alternating voltage, then it is applied to the 2nd Zener two pole
Applying voltage on the series circuit of pipe the 54 and the 1st Zener diode 53b, more than the 2nd Zener
The Zener voltage aggregate value of diode the 54 and the 1st Zener diode 53b, therefore the 2nd Zener two
Pole pipe 54 is also switched on.
Now, electric current Ic and tens μ A time usual～hundreds of of flowing in the 2nd resistance 55
μ A compares change greatly tens mA, produces voltage drop on the 2nd resistance 55, is applied to the 2nd electricity
Voltage Vc on resistance the 55 and the 1st Zener diode 53b rises.Such as, if the 2nd resistance
The resistance value of 55 is 100 ohms, and electric current Ic is about 40mA, then the 2nd resistance 55
Voltage reduce to about 4V, be applied on the 2nd resistance the 55 and the 1st Zener diode 53b
Voltage Vc becomes about Vc=24V+4V=28V.The output voltage of the 2nd constant voltage circuit 53
Vd will about rated voltage 21V when usual on decline plus the voltage of the 2nd resistance 55
Amount i.e. about 4V, and rise to about 25V.But, owing to the voltage of this about 25V surpasses
Cross the Zener voltage (about 24V) of the 3rd Zener diode 56, therefore the 3rd Zener diode
56 conductings, the output voltage Vd of the 2nd constant voltage circuit 53 is suppressed to the 3rd Zener diode 56
Zener voltage (about 24V).
It addition, now, the output voltage Vd of the 2nd constant voltage circuit 53 is more than the 4th Zener two pole
Zener voltage 23V of pipe 9a, but the 4th Zener diode 9a is connected in series with resistance 91b, electricity
Resistance 91b shares voltage and limits electric current, and therefore to be maintained the 3rd neat for the voltage of power circuit 5
Receive the Zener voltage (24V) of diode 56.Its result, the 4th Zener diode 9a keeps leading
Logical, in integrating circuit 9b, start the charging of capacitor 9b2 via resistance 9b1.But,
In the case of producing instantaneous surge voltage, superposition on the alternating voltage in alternating current circuit 1
The time of surge voltage is the shortest (such as, 1～about 2msec).Therefore, capacitor 9b2
Voltage rise the most fully, i.e. due to power circuit 5 output voltage more than the 2nd regulation
The time of voltage is shorter than stipulated time, therefore the output access failure of comparison circuit 9c, leakage, breaking
Device 100 does not carry out cut-out action.
So, RCCB 100 does not carry out cut-out action, the output voltage of power circuit 5
It is suppressed to the Zener voltage of the 3rd Zener diode 56, protection electric-leakage detection circuit 6 and tripping operation
Device 4 is from the impact of surge voltage.
Below, the situation being superimposed with continuous print overvoltage in alternating current circuit is illustrated.
If being applied continuously in the overvoltage of a few kV to alternating current circuit 1, then owing to being applied to the 2nd
Applying voltage on the series circuit of Zener diode 54 and the 1st Zener diode 53b is more than
The Zener voltage aggregate value of 2 Zener diode the 54 and the 1st Zener diode 53b, therefore the 2nd
Zener diode 54 is also switched on.
Now, in the 2nd resistance 55 flowing electric current Ic and tens μ A time usual～several
Hundred μ A compare change greatly tens mA, produce voltage drop, be applied to the 2nd on the 2nd resistance 55
Voltage Vc on resistance the 55 and the 1st Zener diode 53b rises.Such as, if the 2nd is electric
The resistance value of resistance 55 is 100 ohms, and electric current Ic is about 40mA, then the 2nd resistance
The voltage of 55 reduces to about 4V, is applied on the 2nd resistance the 55 and the 1st Zener diode 53b
Voltage Vc become about Vc=24V+4V=28V.The output electricity of the 2nd constant voltage circuit 53
Pressure Vd will about rated voltage 21V when usual on plus under the voltage of the 2nd resistance 55
Fall amount i.e. about 4V, and rise to about 25V.But, due to the voltage of this about 25V
More than the Zener voltage (about 24V) of the 3rd Zener diode 56, therefore the 3rd Zener two pole
Pipe 56 turns on, and the output voltage Vd of the 2nd constant voltage circuit 53 is suppressed to the 3rd Zener diode
The Zener voltage (about 24V) of 56.
Now, the output voltage Vd of the 2nd constant voltage circuit 53 is more than the 4th Zener diode 9a
Zener voltage 23V, therefore the 4th Zener diode 9a is also switched on, in integrating circuit 9b
The charging of capacitor 9b2 is started via resistance 9b1.In the case of continuous print overvoltage,
The voltage of capacitor 9b2 rises fully, and the output voltage of power circuit 5 is more than the 2nd regulation
The time of value exceeds schedule time, and the output of comparison circuit 9c is connected, and output is to switch element 8.
The output of comparison circuit 9c, switch element 8 is utilized also to connect, from power circuit 5 via switch
Unit 8 flows through exciting current, tripping mechanism 4b action to breaking coil 4a, thus, disconnects
Opening and closing contact 2.Further, owing to opening and closing contact 2 disconnects, therefore the power supply to power circuit 5 stops
Only.
According to present embodiment, possess: power circuit 5, its by the 2nd constant voltage circuit 53,
2 Zener diode the 54 and the 2nd resistance 55 are constituted, and wherein, the 2nd constant voltage circuit 53 makes
From the electric power that electric power blood pressure lowering is constant voltage of alternating current circuit 1 supply, the 2nd Zener diode 54
Detecting overvoltage according to the output voltage of rectification circuit 52, the 2nd resistance 55 is the 2nd
Zener diode 54 makes the output voltage of the 2nd constant voltage circuit 53 boost when detecting overvoltage；
3rd Zener diode 56, it is arranged on the outlet side of this power circuit 5, at power circuit 5
Output voltage absorb surge current when reaching 1 setting；And overvoltage detection circuit 9,
It is arranged on the outlet side of power circuit 5, and the output voltage at power circuit 5 is advised more than the 2nd
During definite value, driving tripgear 4, wherein, the 2nd setting is than the specified electricity of power circuit 5
Pressure is high and lower than the 1st setting, owing to possessing above-mentioned parts, therefore, even if in pressure test
In the case of alternating current circuit 1 is applied continuously in overvoltage, also can be by making RCCB
100 cut off, and protect RCCB 100 not break down.
Further, since overvoltage detection circuit 9 possesses integrating circuit 9b, and at power circuit 5
Output voltage reach in the case of time of the 2nd setting exceeds schedule time, to drive tripping operation
Device, therefore, is failure to actuate, it is possible to prevent under the overvoltage caused because of the surge voltage of moment
Unnecessary tripping operation, wherein, the 2nd setting is higher than the rated voltage of power circuit 5 and compares
1st setting is low.
Further, since for the common detection of electrical leakage IC (Integrated of electric-leakage detection circuit 6
Circuit) being built-in with comparison circuit 9c, therefore overvoltage detection circuit 9 can utilize the 4th neat
Receive diode 9a and the integrating circuit 9b that is made up of resistance 9b1,9b3, capacitor 9b2
Constitute.Therefore, it is possible to low cost protection RCCB 100 from right because of pressure test etc.
The fault that alternating current circuit 1 is applied continuously in overvoltage and causes.
If it addition, power circuit 5 is applied in overvoltage, then its output voltage rises, therefore
Overvoltage detection circuit 9 can be arranged on the outlet side i.e. low voltage side of power circuit 5, make
With parts can miniaturization, and realize the miniaturization of RCCB.
Embodiment 2.
Fig. 3 is the RCCB representing the power circuit that make use of embodiments of the present invention 2
The circuit diagram of structure, Fig. 4 is of the details representing the electric-leakage detection circuit shown in Fig. 3
The block diagram of example.
The overvoltage detection circuit of the RCCB 101 replacement embodiment 1 of present embodiment
9, and it is provided with the leakage tests circuit 10 comprising overvoltage detection circuit, it is achieved with above-mentioned reality
Execute the various effects that mode 1 is identical.
In figure 3, the leakage tests circuit 10 of RCCB 101 is made up of components described below:
4th Zener diode 9a, the negative electrode of its negative electrode and the 3rd Zener diode 56 connects；Test is opened
Closing 10a, its one end is connected with the output of the 1st constant voltage circuit 7, the other end and the 4th Zener two pole
The anode of pipe 9a connects；Test current generating circuit 10b, its input and the 4th Zener diode
The anode of 9a and the other end of test switch 10a connect；Resistance 10c, its one end and the 4th
The negative electrode of Zener diode 9a connects；And transistor 10d, its base stage generates with test electric current
The output of circuit 10b connects, and colelctor electrode is connected with the other end of resistance 10c.
Further, the output of the leakage tests circuit 10 i.e. emitter stage of transistor 10d and test winding
One end of 11 connects, and the other end of test winding 11 runs through zero phase sequence currenttransformer 3, then with whole
The output negative pole side of current circuit 52 connects.
Utilize leakage tests circuit 10 and test winding 11, constitute and be used for RCCB being just
Normal situation carries out the leakage tests function checked.
Utilize Fig. 4 that the details of electric-leakage detection circuit 6 are described.In the diagram, electric-leakage detection circuit
6 are made up of components described below: wave filter 6a, and it is connected with zero phase sequence currenttransformer 3, from zero phase-sequence
The output signal of current transformer 3 is by radio-frequency component higher compared with the supply frequency of alternating current circuit 1
Remove；Level determinant 6b, it is transfused to the output signal of this wave filter 6a, to wave filter
The output level of the output signal of 6a judges；Signal amplitude arbiter 6c, level is sentenced by it
The time-amplitude of the output signal determining device 6b differentiates；Enumerator 6d, if it is to signal width
The output signal of degree arbiter 6c has carried out stipulated number counting, then output pulse signal；Regularly
Device 6e, it receives the last output signal of signal amplitude arbiter 6c, after the stipulated time
Enumerator 6d is reset；And trigger circuit 6f, its count pick up device 6d pulse signal and
Driving switch element 8.
For other structures and action, due to identical with embodiment 1, therefore the description thereof will be omitted.
Action is described below.
In order to carry out common leakage tests action, in the case of making test switch 10a connect,
From the 1st constant voltage circuit 7, test current generating circuit 10b is supplied power supply, make transistor 10d
Switch, thus flow through test electric current, i.e. leakage analog electricity via resistance 10c to test winding 11
Stream.If flowing through test electric current, then in the output of zero phase sequence currenttransformer 3 in test winding 11
Middle generation signal, is determined as electric leakage if, with electric-leakage detection circuit 6, then exports to switching list
Unit 8.Switch element 8 is connected due to this output, from power circuit 5 via switch element 8 to
Breaking coil 4a flows through exciting current, tripping mechanism 4b action, thereby turns off opening and closing contact 2,
Cut off RCCB 101.
The situation being superimposed with instantaneous surge voltage on alternating voltage in alternating current circuit is carried out
Explanation.
If the surge voltage of a few kV of superposition on alternating voltage, then it is applied to the 2nd Zener two pole
Applying voltage on the series circuit of pipe the 54 and the 1st Zener diode 53b is more than the 2nd Zener two
The Zener voltage aggregate value of pole pipe the 54 and the 1st Zener diode 53b, therefore the 2nd Zener two pole
Pipe 54 is also switched on.
Now, electric current Ic and tens μ A time usual～hundreds of of flowing in the 2nd resistance 55
μ A compares change greatly tens mA, produces voltage drop on the 2nd resistance 55, is applied to the 2nd electricity
Voltage Vc on resistance the 55 and the 1st Zener diode 53b rises.Such as, if the 2nd resistance
The resistance value of 55 is 100 ohms, and electric current Ic is about 40mA, then the 2nd resistance 55
Voltage reduce to about 4V, be applied on the 2nd resistance the 55 and the 1st Zener diode 53b
Voltage Vc becomes about Vc=24V+4V=28V.The output voltage of the 2nd constant voltage circuit 53
Vd will about rated voltage 21V when usual on decline plus the voltage of the 2nd resistance 55
Amount i.e. about 4V, and rise to about 25V.But, owing to the voltage of this about 25V surpasses
Cross the Zener voltage (about 24V) of the 3rd Zener diode 56, therefore the 3rd Zener diode
56 conductings, the output voltage Vd of the 2nd constant voltage circuit 53 is suppressed to the 3rd Zener diode 56
Zener voltage (about 24V).
It addition, now, the output voltage Vd of the 2nd constant voltage circuit 53 is more than the 4th Zener two pole
Zener voltage 23V of pipe 9a, therefore the 4th Zener diode 9a conducting, generate test electric current
Circuit 10b supplies power supply, makes transistor 10d switch, so that test electric current is at test winding
Flow through in 11.If flowing through test electric current, then at zero phase sequence currenttransformer 3 in test winding 11
Output in produce signal, but as shown in Figure 4, the electric leakage from this zero phase sequence currenttransformer 3 is believed
Number utilize wave filter 6a to remove radio-frequency component, input to level determinant 6b, it is determined that its level.
If electric leakage signal is more than or equal to the level of regulation, then next by signal amplitude arbiter 6c
Differentiate the time-amplitude of signal.If the time-amplitude of electric leakage signal also greater than or equal to decision content,
Then further with enumerator 6d, the period before enumerator 6d is reset by intervalometer 6e is right
The situation that electric leakage signal carries out repeating with substantially commercial frequency counts.
But, in the case of surge voltage, superposition wave on the alternating voltage in alternating current circuit
Gush the time the shortest (such as, 1～about 2msec) of voltage.Therefore, draw because of surge voltage
Even if the electric leakage signal risen is input to signal amplitude arbiter 6c, also can signal amplitude not enough and
Will not be exported from signal amplitude arbiter 6c, even if or by from signal amplitude arbiter 6c
Output, counts in enumerator 6d the most discontinuously, it is impossible to export pulse from enumerator 6d.
It is that is, shorter than stipulated time more than the time of the 2nd setting due to the output voltage of power circuit 5,
Therefore, the output triggering circuit 6f is disconnected, and RCCB 101 does not carry out cut-out action.
So, RCCB 101 does not carry out cut-out action, and the 2nd constant voltage circuit 53
Output voltage Vd is restricted to the Zener voltage of the 3rd Zener diode 56, protects detection of electrical leakage
Circuit 6 and tripgear 4 affect from surge voltage.
Below, the situation being superimposed with continuous print overvoltage in alternating current circuit 1 is illustrated.
If being applied continuously in the overvoltage of a few kV in alternating current circuit, then with embodiment 1
In the same manner, the series circuit of the 2nd Zener diode the 54 and the 1st Zener diode 53b it is applied to
On apply voltage more than the 2nd Zener diode the 54 and the 1st Zener diode 53b Zener electricity
Pressing evaluation, therefore the 2nd Zener diode 54 is also switched on.
Now, electric current Ic and tens μ A time usual～hundreds of of flowing in the 2nd resistance 55
μ A compares change greatly tens mA, produces voltage drop on the 2nd resistance 55, is applied to the 2nd electricity
Voltage Vc on resistance the 55 and the 1st Zener diode 53b rises.Such as, if the 2nd resistance
The resistance value of 55 is 100 ohms, and electric current Ic is about 40mA, then the 2nd resistance 55
Voltage reduce to about 4V, be applied on the 2nd resistance the 55 and the 1st Zener diode 53b
Voltage Vc becomes about Vc=24V+4V=28V.The output voltage of the 2nd constant voltage circuit 53
Vd will be plus the falling quantity of voltages of the 2nd resistance 55 on voltage about the 21V when usual
About 4V, and rise to about 25V.But, owing to the voltage of this about 25V is more than the 3rd
The Zener voltage (about 24V) of Zener diode 56, therefore the 3rd Zener diode 56 is led
Logical, the output voltage Vd of the 2nd constant voltage circuit 53 is suppressed to the neat of the 3rd Zener diode 56
Receive voltage (about 24V).
It addition, the output voltage Vd of the 2nd constant voltage circuit 53 is more than the 4th Zener diode 9a
Zener voltage 23V, therefore the 4th Zener diode 9a conducting, to test current generating circuit
10b supplies power supply, makes test electric current in test winding 11 by making transistor 10d switch
Flow through.If flowing through simulation leakage current, then at zero phase sequence currenttransformer 3 in test winding 11
Producing signal in output, as shown in Figure 4, utilize wave filter 6a to remove radio-frequency component, input is extremely
Level determinant 6b, judges level.In the case of continuous print overvoltage, due to greatly
In or equal to regulation level, therefore to signal amplitude arbiter 6c export.Further, at signal
In amplitude arbiter 6c, the time-amplitude to signal differentiates, due to the time width of electric leakage signal
Spend also greater than or be equal to decision content, therefore, further with enumerator 6d, will at intervalometer 6e
The situation that electric leakage signal is repeated by the period before enumerator 6d replacement with substantially commercial frequency is carried out
Count and be determined as electric leakage, and export to switch element 8.Switch element 8 connects due to this output
Logical, flow through exciting current via switch element 8 to breaking coil 4a from power circuit 5, tripping operation
Mechanism's 4b action, thereby turns off opening and closing contact 2.By disconnecting opening and closing contact 2, thus to electricity
The power supply of source circuit 5 stops.
So, if overvoltage is applied to alternating current circuit 1 continuously, then power circuit 5
Output voltage more than the 2nd setting, the time exceeding the 2nd setting exceed schedule time and
Make earth leakage tester 10 drive, thus make RCCB 101 carry out electrical leakage breaking action,
It is thus possible to protection power circuit 5 does not breaks down.
It addition, as previously mentioned, for electric-leakage detection circuit 6, in order to prevent the surge because of moment
The unnecessary action caused, utilizes situation about repeating electric leakage signal with substantially commercial frequency to carry out
Counting, the function differentiated, make this electric-leakage detection circuit 6 the most electric cause because of the surge of moment
Pressure is failure to actuate, only in the situation being applied with the continuous print overvoltage more than or equal to the stipulated time
Lower action.
According to present embodiment, having: power circuit 5, it is permanent by rectification circuit the 52, the 2nd
Volt circuit the 53, the 2nd Zener diode the 54 and the 2nd resistance 55 is constituted, wherein, and this rectification
The alternating voltage supplied from alternating current circuit 1 is transformed to DC voltage by circuit 52, and the 2nd is permanent
Volt circuit 53 carries out blood pressure lowering, the 2nd Zener diode 54 to the output of this rectification circuit 52
Detecting overvoltage according to the output voltage of rectification circuit 52, the 2nd resistance 55 is at the 2nd Zener
Diode 54 makes the output voltage of the 2nd constant voltage circuit 53 boost when detecting overvoltage；3rd
Zener diode 56, it is arranged on the outlet side of this power circuit 5, defeated at power circuit 5
Go out voltage to reach to absorb surge current during 1 setting；And leakage tests circuit 10, it sets
Put the outlet side at power circuit 5, comprise overvoltage detection circuit, this overvoltage detection circuit
When the rated voltage of power circuit 5 reaches 2 setting, driving tripgear 4, wherein,
2nd setting is higher than the rated voltage of power circuit 5 and lower than the 1st setting, due to tool
Therefore standby above-mentioned parts, even if be applied continuously in electricity in pressure test etc. in alternating current circuit 1
In the case of pressure, it is also possible to protect RCCB 101 by making RCCB 101 cut off
Do not break down.
It addition, the situation that electric leakage signal is repeated by electric-leakage detection circuit 6 with substantially commercial frequency is entered
Row counting, differentiate, therefore leakage tests circuit 10 at the output voltage of power circuit 5 more than the
The time of 2 settings drives tripgear 4 in the case of reaching the stipulated time, it is possible to because of moment
The overvoltage that causes of surge voltage under be failure to actuate, prevent unnecessary cut-out.
It addition, comprise the leakage tests circuit 10 of overvoltage detection circuit, make at RCCB
In the leakage tests circuit being generally of for necessary functions, the most attached as overvoltage detection circuit
Add the 4th Zener diode 9a, therefore, it is possible to protection RCCB 101 at lower cost
The fault not occurring to be applied continuously in overvoltage because of pressure test etc. in alternating current circuit 1 and cause.
Embodiment 3.
Fig. 5 is the leakage of the direct current representing the power circuit that make use of embodiments of the present invention 3
The circuit diagram of the structure of electrical circuit breakers.
In Figure 5, the RCCB 102 of present embodiment is by the overvoltage of embodiment 1
Testing circuit 9 is applied to the RCCB of direct current.In embodiment 1, by zero phase-sequence
Current transformer is used as leakage meter, but uses as leakage meter and can detect direct current
The fluxgate sensor 31 of leakage current, it is achieved the various effects identical with above-mentioned embodiment 1.
As it is shown in figure 5, fluxgate sensor 31 possesses: ring-type 31a unshakable in one's determination, DC circuit
11 insert in this iron core 31a；Coil 31b, it is wound on 31a unshakable in one's determination；Drive circuit 31c,
It applies voltage to coil 31a, so that making direction invert with the square wave of Symmetrical
While making the flux density saturation of coil 31b；And testing circuit 31d, its according to at coil
The mensuration voltage that the coil current flow through in 31a changes accordingly, detects leakage current.
It addition, in order to prevent the fault during reverse connection of positive pole and negative pole, enforcement can be arranged on
Rectification circuit 52 set in mode 1, but be not indispensable in DC circuit time,
Therefore delete, current-limiting resistance 51 is directly connected to the 2nd constant voltage circuit 53.Specifically, exist
Connect from the side of the positive electrode of the voltage of DC circuit 11 supply and have the FET 53a of the 2nd constant voltage circuit 53
Drain electrode, the voltage supplied from DC circuit 11 negative side connect have the 3rd Zener diode
Anode and the junction point of the 2nd resistance 55.Power circuit 5 dynamic for present embodiment
Make, due to embodiment 1 in utilize rectification circuit 52 and by identical after voltage DC,
Therefore the description thereof will be omitted.
According to present embodiment, possess: power circuit 5, its by the 2nd constant voltage circuit 53,
2 Zener diode the 54 and the 2nd resistance 55 are constituted, and wherein, the 2nd constant voltage circuit 53 will
From the electric power that electric power blood pressure lowering is constant voltage of DC circuit 11 supply, the 2nd Zener diode 54
Detecting the overvoltage from DC circuit 11, the 2nd resistance 55 is at the 2nd Zener
Diode 54 makes the output voltage of the 2nd constant voltage circuit 53 boost when detecting overvoltage；3rd
Zener diode 56, it is arranged on the outlet side of this power circuit 5, defeated at power circuit 5
Go out voltage to reach to absorb surge current during 1 setting；And overvoltage detection circuit 9, it sets
Put the outlet side at power circuit 5, at the output voltage of power circuit 5 more than the 2nd setting
In the case of, drive tripgear 4, wherein, specified than power circuit 5 of the 2nd setting
Voltage is high and lower than the 1st setting, owing to possessing above-mentioned parts, therefore exists in pressure test etc.
In the case of being applied continuously in overvoltage on DC circuit 11, it is also possible to by making leakage, breaking
Device 102 cuts off, and protects RCCB 102 not break down.
Embodiment 4.
Fig. 6 is the structure of the RCCB of the direct current representing embodiments of the present invention 4
Circuit diagram.
In Fig. 6, the RCCB 103 of present embodiment is the mistake by comprising embodiment 2
The leakage tests circuit 10 of voltage detecting circuit is applied to the leakage of the direct current shown in embodiment 3
Structure on electrical circuit breakers.Identically with embodiment 3, as leakage meter, use
The fluxgate sensor 31 of the leakage current of direct current can be detected, it addition, replace embodiment 3
Overvoltage detection circuit 9, is provided with the leakage tests circuit 10 comprising overvoltage detection circuit.
And, it is achieved the various effects identical with above-mentioned embodiment 2 and embodiment 3.
Additionally, in the present embodiment, in order to prevent fault when positive pole and negative pole reverse connection,
It is provided with the rectification circuit 52 being not provided with in embodiment 3.
Fluxgate sensor 31 has: ring-type 31a unshakable in one's determination, and DC circuit 11 inserts this ferrum
In heart 31a；Coil 31b, it is wound on 31a unshakable in one's determination；Drive circuit 31c, it is with positive and negative
Symmetrical square wave applies voltage to coil 31a, so that making direction reversion make line
The flux density saturation of circle 31b；And testing circuit 31d, it flows according to in coil 31a
The mensuration voltage that the coil current crossed changes accordingly, detects leakage current.
Leakage tests circuit 10 is made up of components described below: the 4th Zener diode 9a, its negative electrode
It is connected with the negative electrode of the 3rd Zener diode 56；Test switch 10a, its one end and the 1st constant voltage
The output of circuit 7 connects, and the anode of the other end and the 4th Zener diode 9a connects；Resistance 10c,
Its one end is connected with the negative electrode of the 4th Zener diode 9a；And transistor 10d, its base stage with
The other end of test switch 10a connects, and colelctor electrode is connected with the other end of resistance 10c.
Further, the output of the leakage tests circuit 10 i.e. emitter stage of transistor 10d and test winding
One end of 11 connects, and the other end of test winding 11 is from the coil 31a of fluxgate sensor 31
After running through, the output negative pole side with rectification circuit 52 is connected.
Utilize leakage tests circuit 10 and test winding 11 constitute for RCCB for just
Often carry out the leakage tests function checked.
For other structures and action, due to identical with embodiment 3, therefore the description thereof will be omitted.
Below, explanation action.
In order to carry out common leakage tests action, in the case of making test switch 10a connect,
Supply power supply from the 2nd constant voltage circuit 53, make transistor 10d switch, thus via resistance 10c
Test electric current i.e. leakage analog electric current is flow through to test winding 11.Test winding 11 flows through
In the case of test electric current, differentiate according to the output of 31a unshakable in one's determination if, with testing circuit 31d
For electric leakage, then export to switch element 8 from testing circuit 31d.Switch element 8 is due to this output
And connect, flow through exciting current via switch element 8 to breaking coil 4a from power circuit 5,
Tripping mechanism 4b action, thus, disconnects opening and closing contact 2, cuts off RCCB 103.
Below, the situation being superimposed with continuous print overvoltage in DC circuit 11 is illustrated.
If DC circuit 11 to be applied continuously in the overvoltage of a few kV, then with embodiment 2
In the same manner, the series circuit of the 2nd Zener diode the 54 and the 1st Zener diode 53b it is applied to
On apply voltage more than the 2nd Zener diode the 54 and the 1st Zener diode 53b Zener electricity
Pressing evaluation, therefore the 2nd Zener diode 54 is also switched on.
Now, electric current Ic and tens μ A time usual～hundreds of of flowing in the 2nd resistance 55
μ A compares change greatly tens mA, produces voltage drop on the 2nd resistance 55, is applied to the 2nd electricity
Voltage Vc on resistance the 55 and the 1st Zener diode 53b rises.Such as, if the 2nd resistance
The resistance value of 55 is 100 ohms, and electric current Ic is about 40mA, then the 2nd resistance 55
Voltage reduce to about 4V, be applied on the 2nd resistance the 55 and the 1st Zener diode 53b
Voltage Vc becomes about Vc=24V+4V=28V.The output voltage of the 2nd constant voltage circuit 53
Vd will about rated voltage 21V when usual on decline plus the voltage of the 2nd resistance 55
Amount i.e. about 4V, and rise to about 25V.But, owing to the voltage of this about 25V surpasses
Cross the Zener voltage (about 24V) of the 3rd Zener diode 56, therefore the 3rd Zener diode
56 conductings, the output voltage Vd of the 2nd constant voltage circuit 53 is suppressed to the 3rd Zener diode 56
Zener voltage (about 24V).
Further, since the output voltage Vd of the 2nd constant voltage circuit 53 is more than the 4th Zener diode
Zener voltage 23V of 9a, therefore the 4th Zener diode 9a conducting, makes transistor 10d turn on,
Thus flow through simulation leakage current in test winding 11.If flowing through mould in test winding 11
Intend leakage current, then the output of 31a unshakable in one's determination changes, if testing circuit 31d is by this change
It is determined as electric leakage, then exports to switch element 8 from testing circuit 31d.Switch element 8 utilizes
This output and connect, flow through excitation via switch element 8 to breaking coil 4a from power circuit 5
Electric current, tripping mechanism 4b action, thereby turn off opening and closing contact 2.Opening and closing contact 2 disconnects, from
And stop to the power supply of power circuit 5.Additionally, testing circuit 31d is from 31a unshakable in one's determination
Output vary more than the stipulated time in the case of judge electric leakage structure.
So, in the case of certain time has been applied continuously in overvoltage, leakage tests is made to fill
Put 10 drivings, thus carry out electrical leakage breaking action such that it is able to protection power circuit 5 does not occurs
Fault.
According to present embodiment, have: power circuit 5, its by the 2nd constant voltage circuit 53,
2 Zener diode the 54 and the 2nd resistance 55 are constituted, and wherein, the 2nd constant voltage circuit 53 will
From the electric power that electric power blood pressure lowering is constant voltage of DC circuit 11 supply, the 2nd Zener diode 54
Detecting the overvoltage from DC circuit 11, the 2nd resistance 55 is at the 2nd Zener
Diode 54 makes the output voltage of the 2nd constant voltage circuit 53 boost when detecting overvoltage；3rd
Zener diode 56, it is arranged on the outlet side of this power circuit 5, defeated at power circuit 5
Go out voltage to reach to absorb surge current during 1 setting；And leakage tests circuit 10, it sets
Put the outlet side at power circuit 5, comprise overvoltage detection circuit, this overvoltage detection circuit
In the case of the output voltage of power circuit 5 is more than the 2nd setting, drive tripgear 4,
Wherein, the 2nd setting is higher than the rated voltage of power circuit 5 and lower than the 1st setting,
Owing to having above-mentioned parts, even if therefore executing continuously in alternating current circuit 1 in pressure test etc.
In the case of having added overvoltage, it is also possible to by making RCCB 103 cut off, and protect leakage
Electrical circuit breakers 103 does not breaks down.
Claims (5)
1. a RCCB, it possesses:
Opening and closing contact, it makes connecting and disconnecting of the circuit；
Leakage meter, the leakage current of described circuit is detected by it；
Electric-leakage detection circuit, it is connected with this leakage meter, examines based on described leakage current
Electric leakage is detected by the detection signal surveying device；
Tripgear, it is driven by this electric-leakage detection circuit, makes described opening and closing contact separation；
And
Power circuit, it is made up of reduction voltage circuit, voltage detecting circuit and booster circuit,
Wherein, the electric power that electric power blood pressure lowering is constant voltage that this reduction voltage circuit will supply from described circuit, this electricity
Overvoltage from described circuit is detected by pressure testing circuit, and this booster circuit is at this voltage
Testing circuit makes the output voltage of described reduction voltage circuit boost when detecting overvoltage,
Described RCCB is characterised by possessing:
Current sink circuit, it is arranged on the outlet side of described power circuit, at described power supply
The output voltage of circuit reaches to absorb surge current during 1 setting；And
Overvoltage detection circuit, it is arranged on the outlet side of described power circuit, at described electricity
In the case of the output voltage of source circuit is more than the 2nd setting, drive described tripgear, its
In the 2nd setting higher than the rated voltage of described power circuit and than described 1st setting
Low.
RCCB the most according to claim 1, it is characterised in that
Described overvoltage detection circuit exceedes the described 2nd at the output voltage of described power circuit
In the case of the time of setting has reached the stipulated time, drive described tripgear.
RCCB the most according to claim 2, it is characterised in that
The switch element that described overvoltage detection circuit pair is connected with described tripgear drives
Dynamic.
RCCB the most according to claim 2, it is characterised in that
Possessing Secondary Winding, this Secondary Winding runs through described leakage meter, is used for flowing through
Simulation leakage current, described overvoltage detection circuit is by flowing through described mould in described Secondary Winding
Intend leakage current and make described electric-leakage detection circuit action, drive described tripgear.
RCCB the most according to any one of claim 1 to 4, its feature exists
In,
Described current sink circuit is the 1st Zener diode,
Described reduction voltage circuit is by field-effect transistor, the 1st resistance and the 1st Zener diode
Constituting, the drain electrode of this field-effect transistor is with the side of the positive electrode of the voltage supplied from described circuit even
Connecing, the 1st resistance is connected between the drain and gate of this field-effect transistor, and the 1st
Zener diode be connected to the grid of described field-effect transistor and described circuit negative side it
Between,
Described voltage detecting circuit be attached to described field-effect transistor drain and gate it
Between the 2nd Zener diode,
Described booster circuit is at the grid of described field-effect transistor and the negative pole of described circuit
The 2nd resistance being connected in series with described 1st Zener diode between side,
Described overvoltage detection circuit is the 3rd Zener diode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-168897 | 2014-08-22 | ||
| JP2014168897A JP6237533B2 (en) | 2014-08-22 | 2014-08-22 | Earth leakage breaker |
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| Publication Number | Publication Date |
|---|---|
| CN105990818A true CN105990818A (en) | 2016-10-05 |
| CN105990818B CN105990818B (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510079592.5A Active CN105990818B (en) | 2014-08-22 | 2015-02-13 | Leakage circuit breakers |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6237533B2 (en) |
| KR (1) | KR101710776B1 (en) |
| CN (1) | CN105990818B (en) |
| TW (1) | TWI612548B (en) |
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| CN111819748A (en) * | 2018-03-08 | 2020-10-23 | Ls电气株式会社 | Residual current circuit breaker and arc detection device with freely-assembled and disassembled residual current circuit breaker |
| US20220373579A1 (en) * | 2019-10-09 | 2022-11-24 | Qingdao Topscomm Communication Co., Ltd | Residual current detection method based on magnetic core working state switching |
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| JP6848204B2 (en) * | 2016-04-26 | 2021-03-24 | 三菱電機株式会社 | Circuit breaker |
| GB201608819D0 (en) * | 2016-05-19 | 2016-07-06 | Cooper Technologies Co | Electronic device and surge handling |
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| KR101798833B1 (en) * | 2017-07-27 | 2017-12-13 | 주식회사 신일라이팅 | Capacitive Leakage Current Reduction Device for Prevent Operation of LED ELB(Earth Leakage Breaker) |
| KR101845666B1 (en) * | 2017-07-27 | 2018-04-06 | 주식회사 신일라이팅 | Device for Preventing Operation of LED ELB(Earth Leakage Breaker) due to Capacitive Leakage Current |
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| JP7122677B2 (en) * | 2018-10-02 | 2022-08-22 | パナソニックＩｐマネジメント株式会社 | Switches and test methods for switches |
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| CN111819748A (en) * | 2018-03-08 | 2020-10-23 | Ls电气株式会社 | Residual current circuit breaker and arc detection device with freely-assembled and disassembled residual current circuit breaker |
| CN111819748B (en) * | 2018-03-08 | 2022-09-06 | Ls电气株式会社 | Residual current circuit breaker and arc detection device with freely-assembled and disassembled residual current circuit breaker |
| TWI680484B (en) * | 2018-05-15 | 2019-12-21 | 日商三菱電機股份有限公司 | Circuit breaker |
| CN112106165A (en) * | 2018-05-15 | 2020-12-18 | 三菱电机株式会社 | Circuit breaker |
| CN112106165B (en) * | 2018-05-15 | 2022-11-11 | 三菱电机株式会社 | Circuit breaker |
| CN110376513A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch inside arcing resistance test circuit |
| CN110376516A (en) * | 2019-07-10 | 2019-10-25 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC high-speed switch inside arcing resistance test method |
| WO2021003775A1 (en) * | 2019-07-10 | 2021-01-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Method for testing internal-arcing-resistance capability of direct-current high-speed switch |
| US20220373579A1 (en) * | 2019-10-09 | 2022-11-24 | Qingdao Topscomm Communication Co., Ltd | Residual current detection method based on magnetic core working state switching |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105990818B (en) | 2018-09-28 |
| KR20160023537A (en) | 2016-03-03 |
| TWI612548B (en) | 2018-01-21 |
| TW201608593A (en) | 2016-03-01 |
| JP2016046063A (en) | 2016-04-04 |
| JP6237533B2 (en) | 2017-11-29 |
| KR101710776B1 (en) | 2017-02-27 |
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