CN101728137A - Direct current circuit-breaker - Google Patents
Direct current circuit-breaker Download PDFInfo
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- CN101728137A CN101728137A CN200910142200A CN200910142200A CN101728137A CN 101728137 A CN101728137 A CN 101728137A CN 200910142200 A CN200910142200 A CN 200910142200A CN 200910142200 A CN200910142200 A CN 200910142200A CN 101728137 A CN101728137 A CN 101728137A
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Abstract
The invention provides a direct current circuit-breaker, which can supply power to the controlling means of the trip driving device reliably and perform circuit break operation reliably when short circuit current occurs in the direct current circuit. The direct current circuit-breaker has: a switch contact (2) for connecting and breaking a direct current circuit; a trip apparatus (7) for breaking the switch contact; a first and second current sensor (3a, 3b) for detecting the current of the direct current circuit; a controlling means (6) for actuating the trip apparatus (7) along with the detection current of the first and second current sensor (3a, 3b); a first and second AC current transformer (8a, 8b) disposed in the direct current circuit for detecting the current variation of the direct current circuit; and a first power supply circuit (9) for supplying electric power to the controlling means (6) based on the outputs of the first and second AC current transformer (8a, 8b) when excess current is generated by short circuit accident in the direct current circuit.
Description
Technical field
The present invention relates to a kind of d-c circuit breaker.
Background technology
Current, as the supply unit in the circuit-breaker, has following technology, AC convertor is set, its output current is synthesized and generate direct voltage, this direct voltage is supplied with to the control circuit of tripgear, wherein, the corresponding electric current (for example, with reference to patent documentation 1) of variation of the electric current that flows through in the output of this AC convertor and the alternating current circuit.
Patent documentation 1: the spy opens flat 4-188532 communique Fig. 1
Summary of the invention
Power supply at circuit-breaker uses under the situation of AC convertor, in above-mentioned alternating current circuit, when being short-circuited accident, even the magnetic core of AC convertor is reached capacity by short circuit current, but because this short circuit current is alternating current, so, just can continue the acquisition output current from AC convertor whenever the direction transformation of short circuit current, can be to the control circuit sustainable supply power supply that switch contact is disconnected, thus can open circuit action reliably.
But in DC circuit, can only short circuit current increase and till the magnetic core of AC convertor is reached capacity or short circuit current reach capacity till in that short time in the two, obtain output current 1 time from AC convertor.Therefore, if the AC convertor that can obtain output voltage when the short circuit current of the degree that is several times as much as rated current is set, then very big at short circuit current, under the situation near the limit of the breaking capacity of circuit-breaker, the magnetic core of AC convertor just reaches capacity in the very short time, can't be enough to be used in driving the power supply of the time of tripgear to control circuit and supply with.On the contrary, if the AC convertor that the big short circuit current with the breaking capacity limit that approaches circuit-breaker is complementary is set, then under the situation of the degree that is several times as much as rated current and not very big short circuit current, the output voltage that can't obtain to make the control circuit that drives tripgear to move from AC convertor, thus the problem of the action of can't opening circuit reliably produced.
The present invention is conceived to above-mentioned situation and proposes, its purpose is to obtain a kind of d-c circuit breaker, when it is short-circuited accident in DC circuit, size regardless of short circuit current, can be to the control circuit that drives tripgear supply power reliably, the action of can opening circuit reliably.
D-c circuit breaker of the present invention has: switch contact, and it makes the DC circuit on/off; Tripgear, it disconnects this switch contact; Current detecting unit, it detects the electric current of DC circuit; Control device, the detection electric current servo-actuated of itself and this current detecting unit and to described tripgear output trip signal; A plurality of AC convertor, it is arranged on the DC circuit, and output characteristic difference each other is so that in DC circuit during short circuit current flow, regardless of the size of short circuit current, can be from the assigned voltage of at least 1 AC convertor acquisition more than or equal to the stipulated time; And the 1st power circuit, its in DC circuit during short circuit current flow, based on the output voltage of AC convertor to the control device supply capability.
The effect of invention
According to the present invention, by having the 1st power circuit, it is based on the output voltage of a plurality of AC convertor and to the control device supply capability that is used to export trip signal, above-mentioned a plurality of AC convertor output characteristic difference each other, so that in circuit during short circuit current flow, size regardless of short circuit current, can be from the assigned voltage of at least 1 AC convertor acquisition more than or equal to the stipulated time, even thereby when in DC circuit, producing short circuit current, also can be to the control device supply power that drives tripgear, the action of can opening circuit reliably.
Description of drawings
Fig. 1 is the block diagram of the structure of the d-c circuit breaker in the expression embodiments of the present invention 1.
DC circuit electric current when Fig. 2 is the short circuit accident of expression in the embodiments of the present invention 1 and be arranged on the 1st AC convertor 8a in the DC circuit and the oscillogram of the output of the 2nd AC convertor 8b.
Fig. 3 is the oscillogram of the output voltage that by 1st power circuit 9 and 2nd power circuit 10 generated of expression in the embodiments of the present invention 1.
Fig. 4 is the block diagram of the structure of the d-c circuit breaker in the expression embodiments of the present invention 2.
DC circuit electric current when Fig. 5 is the short circuit accident of expression in the embodiments of the present invention 2 and be arranged on the 1st AC convertor 8a in the DC circuit and the oscillogram of the output of the 2nd AC convertor 8b.
Fig. 6 is the oscillogram of the output voltage that by 1st power circuit 9 and 2nd power circuit 10 generated of expression in the embodiments of the present invention 2.
Embodiment
Execution mode 1
Fig. 1 is the block diagram of the structure of the d-c circuit breaker in the expression embodiments of the present invention 1.Fig. 2 be expression during short circuit accident the DC circuit electric current and be arranged on the 1st AC convertor 8a in the DC circuit and the oscillogram of the output of the 2nd AC convertor 8b, (a) be circuital current and the output current of the 1st AC convertor 8a and the oscillogram of output voltage that flows through DC circuit, (b) being circuital current and the output current of the 2nd AC convertor 8b and the oscillogram of output voltage that flows through DC circuit, (c) is the oscillogram that the synthetic output of the circuital current of DC circuit 1a and 1b and the 1st AC convertor 8a and the 2nd AC convertor 8b is flow through in expression.Fig. 3 is the oscillogram of expression by the output voltage of the 1st power circuit 9 and 10 generations of the 2nd power circuit, (a) be the oscillogram of the output voltage that generates by the 1st power circuit 9, (b) being the oscillogram of the output voltage that generated by the 2nd power circuit 10, (c) is that output voltage with the output voltage of the 1st power circuit 9 and the 2nd power circuit 10 synthesizes and the oscillogram of the power source voltage Vcc that obtains.
In Fig. 1, d-c circuit breaker 100 has following parts and constitutes: switch contact 2, and it makes DC circuit 1a, 1b carry out on/off; The 1st current sensor 3a and the 2nd current sensor 3b, be current detecting unit, the 1st current sensor 3a detects the electric current that flows through DC circuit 1a, and the 2nd current sensor 3b detects the electric current that flows through DC circuit 1b; Signal conversion circuit 4, its output signal with the 1st and the 2nd current sensor 3a, 3b is converted into specified level; A/D translation circuit 5, its output signal with signal conversion circuit 4 is transformed to digital value; Control device 6, it exports trip signal according to from the digital value of A/D translation circuit 5 outputs current value being carried out computing under the situation of operation result greater than defined threshold; Tripgear 7, it is being sent under the situation of trip signal from this control device 6, and switch contact 2 is disconnected; A plurality of AC convertor are the 1st AC convertor 8a and the 2nd AC convertor 8b for example, they are arranged among the DC circuit 1a, output characteristic difference each other, so that in DC circuit during short circuit current flow, regardless of the size of short circuit current, can be from the assigned voltage of at least 1 AC convertor acquisition more than or equal to the stipulated time; The 1st power circuit 9, it supplies with the power source voltage Vcc of the electric power generation that obtains based on the output of the 1st and the 2nd AC convertor 8a, 8b is synthesized; And the 2nd power circuit 10, it supplies with the power source voltage Vcc that the voltage between lines based on DC circuit 1a, 1b generates.Load-side at d-c circuit breaker 100 is connected with DC load 11.
Below, the 1st and the 2nd power circuit 9,10 is elaborated.
The 1st power circuit 9 has following parts and constitutes: the 1st rectification circuit 91, and it is made of the diode full-bridge circuit, and the output voltage of the 1st and the 2nd AC convertor 8a, 8b is synthesized and rectification; The 1st current-limiting resistance 92, the anodal back segment that it is arranged on the 1st rectification circuit 91 limits electric current; Capacitor 93, it is connected between the negative pole of the output of the 1st current-limiting resistance 92 and the 1st rectification circuit 91; The 2nd current-limiting resistance 94, it is connected on the tie point between this capacitor 93 and the 1st current-limiting resistance 92, and electric current is limited; And the 1st Zener diode 95, it is connected between the negative pole of the output of the 2nd current-limiting resistance 94 and capacitor 93.
In addition, the 2nd power circuit 10 has following parts and constitutes: the 2nd rectification circuit 101, and it is made of the diode full-bridge circuit that is connected with DC circuit 1a, 1b; The 3rd current-limiting resistance 102, the anodal back segment that it is connected the 2nd rectification circuit 101 limits electric current; Constant voltage circuit 103, the back segment that it is arranged on the 3rd current-limiting resistance 102 is connected between the negative pole of the output of the 3rd current-limiting resistance 102 and the 2nd rectification circuit 101; The 2nd Zener diode 104, it is connected between the negative pole of the output of the 3rd current-limiting resistance 102 and the 2nd rectification circuit 101, and restriction is to the voltage of constant voltage circuit 103 inputs; And adverse current prevents that its output with constant voltage circuit 103 is connected, and prevents the electric current adverse current with diode 105.In addition, the adverse current of the 2nd power circuit 10 prevents to be connected with the positive pole of the 1st Zener diode 95 of the 1st power circuit 9 with the output of diode 105, voltage between the 1st Zener diode 95 two ends as power source voltage Vcc, is supplied to the 1st and the 2nd current sensor 3a, 3b, signal conversion circuit 4, A/D translation circuit 5 and control device 6.
In addition, the purpose of the 1st AC convertor 8a is, under the short circuit current of the degree of the rated current that is several times as much as circuit-breaker, obtain the moved lower voltage limit V10 of control device 6 grades as output voltage, the purpose of the 2nd AC convertor 8b is, when flowing through the short circuit current greatly of the breaking capacity that approaches circuit-breaker, be enough to guarantee to move in the time that control device 6 is moved lower voltage limit V10, for example, 2 coil turns of the 1st AC convertor 8a are set at the 2nd AC convertor 8b 2 coil turns 1/3.
In addition, the defined threshold judged of being used to trip is can be by the not shown input unit value of setting arbitrarily, for example can select in 200%～1000% scope of the rated current of d-c circuit breaker.In addition, the 1st and the 2nd current sensor 3a, 3b can adopt the current sensor that for example uses Hall element to constitute.
Below, action is described.
Generally, the voltage between lines of DC circuit 1a, 1b is applied on the 2nd rectification circuit 101 of the 2nd power circuit 10.Even the 2nd rectification circuit 101 for the both positive and negative polarity reversal connection also can regular event purpose be provided with.The output of the 2nd rectification circuit 101 is applied on the 2nd Zener diode 104 via the 3rd current-limiting resistance 102, and the voltage after being limited by the 2nd Zener diode 104 inputs to constant voltage circuit 103.Prevent to be supplied to the 1st current sensor 3a, the 2nd current sensor 3b, signal conversion circuit 4, A/D translation circuit 5 and control device 6 as power source voltage Vcc via adverse current by the voltage after constant voltage circuit 103 constant voltageizations with diode 105.On the other hand, be direct current owing to flow through the electric current of DC circuit 1a and 1b, can not produce bigger variation, so the 1st and the 2nd AC convertor 8a, 8b do not produce output voltage, the 1st power circuit 9 is failure to actuate.
When the load-side of DC circuit 1a, 1b is short-circuited accident, because the voltage between lines disappearance, so shown in Fig. 3 (b), the formation voltage of the 2nd power circuit 10 is owing to the power consumption of control device 6 grades reduces.
But, in the 1st power circuit 9, because the circuital current of DC circuit 1a, 1b sharply increases, so shown in Fig. 2 (a), the output current of the 1st AC convertor 8a and voltage are accompanied by the increase of circuital current and rise rapidly, magnetic core reaches magnetic saturation immediately, and therefore output reduces at short notice.On the other hand, shown in Fig. 2 (b), because output current and the voltage of the 2nd AC convertor 8b, compare slow rising with the 1st AC convertor 8a, magnetic core can not reach magnetic saturation immediately, and therefore the output of the 2nd AC convertor 8b is compared with the 1st AC convertor 8a, can keep the longer time.In addition, the output of the 1st AC convertor 8a and the 2nd AC convertor 8b synthesized and the output that obtains, shown in Fig. 2 (c), become short, output of the rise time long output of holding time.
Shown in Fig. 3 (a), the synthetic output of the 1st AC convertor 8a and the 2nd AC convertor 8b, by 91 rectifications of the 1st rectification circuit, charge the output voltage of the 1st power circuit 9 (T0 of Fig. 3 (a)～T1) that begins to rise via 92 pairs of capacitors 93 of the 1st current-limiting resistance.Shown in Fig. 3 (c), the charging voltage of capacitor 93 is higher than (T1) behind the output voltage of the 2nd power circuit 10 in the 1st power circuit 9, and the 1st power circuit 9 becomes main power source, and beginning is to control circuit 6 Vcc such as supply line voltage such as grade.In addition, here, to have ignored adverse current in order narrating simple and to have prevented forward voltage with diode 105.
Control device 6 is for the digital signal value of the circuital current of importing via signal conversion circuit 4, A/D translation circuit 5 that flows through DC circuit 1a, 1b, compare judgement with predefined trip threshold, if the circuital current that flows through DC circuit 1a, 1b greater than trip threshold (T2), then sends trip signal to tripgear 7.Then, utilize tripgear 7 that switch contact 2 is disconnected, finish open circuit (T3) of DC circuit.
In addition, in the present embodiment, illustration be lower than control device 6 at the voltage that generates by the 2nd power circuit 10 moved lower voltage limit V10 (for example DC5V) before, the 1st power circuit 9 can generate and can move lower voltage limit V10, even can move before the lower voltage limit V10 but generate at the 1st power circuit 9, the voltage of the 2nd power circuit 10 is supplied with and is lower than that can to move lower voltage limit V10 also no problem.That is, can move lower voltage limit V10 as long as can generate by the 1st power circuit 9 in during circuital current is greater than trip threshold, in the present embodiment, need be when tripping action by the voltage of the 2nd power circuit 10 generations.But, owing to, be difficult to generate supply voltage, so the 2nd power circuit 10 is necessary from the 1st power circuit 9 for unlike short circuit current, having for example overload current that rapid circuital current changes.
According to present embodiment, by having the 1st power circuit 9, it is based on the 1st and the 2nd AC convertor 8a, the output voltage of 8b and to control device 6 supply capabilities that are used to export trip signal, the the 1st and the 2nd AC convertor 8a, 8b output characteristic difference each other, during with short circuit current flow in circuit, size regardless of short circuit current, can be from the assigned voltage of at least 1 AC convertor acquisition more than or equal to the stipulated time, even thereby when in DC circuit, producing short circuit current, also can be to control device 6 supply powers that drive tripgear 7, the action of can opening circuit reliably.
In addition, because the 1st AC convertor 8a is that the rise time of output is shorter, the AC convertor of output assigned voltage, the 2nd AC convertor 8b be with the 1st AC convertor 8a mutually rise time of specific output long, reach long AC convertor of magnetically saturated time, therefore in circuit during short circuit current flow, regardless of the short circuit current size, can be reliably to control device 6 supply powers that are used to drive tripgear 7, thus can open circuit action reliably.
In addition, owing to have the 2nd power circuit 10, its based on the voltage between lines of circuit 1a, 1b to control device 6 supply capabilities, even so when producing overcurrent, also can be from the 2nd power circuit 10 to control device 6 supply powers that are used to drive tripgear 7, thus can open circuit action reliably.
In addition, in the present embodiment, as making the magnetic saturation characteristic difference, so that the moved lower voltage limit V10 of controlled as early as possible device 6 grades of the 1st AC convertor 8a, can the try one's best method of the moved lower voltage limit V10 that guarantees control device 6 grades for a long time of the 2nd AC convertor 8b, show the method that changes 2 coil turns, but be not limited to this method.For example can take to use the magnetic core that has the gap, make the magnetic saturation characteristic diverse ways by changing the gap, the method of the sectional area of the magnetic core of change AC convertor, the method for the length of magnetic path of the magnetic core of change AC convertor, the method for the material of the magnetic core of change AC convertor etc.
In addition, in the present embodiment, as the AC convertor that is used for the 1st power circuit 9, the AC convertor that the saturation current of 1 magnetic core differs from one another respectively is set on DC circuit 1a, 1b respectively, but, also can in DC circuit, be provided with more than or equal to 3 different AC convertor of magnetic core saturation current each other in order when being short-circuited accident, to generate more stable power by the 1st power circuit 9.
Fig. 4 is the block diagram of the structure of the d-c circuit breaker in the embodiments of the present invention 2.Fig. 5 is illustrated in the DC circuit electric current when being short-circuited accident and is arranged on the 1st AC convertor 8a in the DC circuit and the oscillogram of the output of the 2nd AC convertor 8b, (a) be the circuital current that flows through DC circuit, oscillogram with output current and the output voltage of the 1st AC convertor 8a, (b) be the circuital current that flows through DC circuit, with the oscillogram of output current and the output voltage of the 2nd AC convertor 8b, (c) be the circuital current that DC circuit 1a and 1b are flow through in expression, oscillogram with the synthetic output of the 1st AC convertor 8a and the 2nd AC convertor 8b.Different with the Fig. 2 in the execution mode 1, short circuit current increases relatively lentamente.The output voltage that Fig. 6 is the output voltage that generated by the 1st power circuit 9 of expression, generated by the 2nd the power circuit 10 and output voltage of the output voltage of the 1st power circuit 9 and the 2nd power circuit 10 being synthesized and the oscillogram of the power source voltage Vcc that obtains, Fig. 6 (a) is based on the oscillogram of the action of execution mode 1, and Fig. 6 (b) is based on the oscillogram of the action of execution mode 2.
In Fig. 4, d-c circuit breaker 101 is provided with as the switch 96 of output control unit and comparing section 12, this switch 96 is arranged between the tie point and the 2nd current-limiting resistance 94 of the 1st current-limiting resistance 92 of the 1st power circuit 9 in the execution mode 1 and capacitor 93, this comparing section 12 compares the 1st and the 2nd current sensor 3a, 3b output signal and specified reference value separately, surpass under the situation of fiducial value one of them side, the output signal of closed control is carried out in output to switch 96.In addition, the fiducial value of preferred comparing section 12 is set at and is equal to or slightly less than the trip threshold that sets in advance in control device 6.Being made as two values in the present embodiment equates.For other formations, since identical with execution mode 1, so omit its explanation.
Below, action is described.
Generally, the voltage between lines of DC circuit 1a, 1b is applied on the 2nd rectification circuit 101 of the 2nd power circuit 10.Even the 2nd rectification circuit 101 for the both positive and negative polarity reversal connection also can regular event purpose be provided with.The output of the 2nd rectification circuit 101 is applied on the 2nd Zener diode 104 via the 3rd current-limiting resistance 102, and the voltage after being limited by the 2nd Zener diode 104 inputs to constant voltage circuit 103.Prevent to be supplied to the 1st current sensor 3a, the 2nd current sensor 3b, signal conversion circuit 4, A/D translation circuit 5 and control device 6 as power source voltage Vcc via adverse current by the voltage after constant voltage circuit 103 constant voltageizations with diode 105.On the other hand, be direct current owing to flow through the electric current of DC circuit 1a and 1b, therefore the 1st and the 2nd AC convertor 8a, 8b do not produce output, and the 1st power circuit 9 is failure to actuate.
When the load-side of DC circuit 1a, 1b is short-circuited accident, because voltage between lines disappears, so the formation voltage of the 2nd power circuit 10 is shown in Fig. 6 (a), owing to the power consumption of control device 6 grades reduces.
In the 1st power circuit 9, because the circuital current of DC circuit 1a, 1b sharply increases, so shown in Fig. 5 (a), the output current of the 1st AC convertor 8a and voltage, rise rapidly along with the increase of circuital current, magnetic core reaches capacity immediately, and therefore output reduces at short notice.On the other hand, shown in Fig. 5 (b), because output current and the voltage of the 2nd AC convertor 8b, compare slow rising with the 1st AC convertor 8a, magnetic core can not reach capacity immediately, and therefore the output of the 2nd AC convertor 8b is compared with the 1st AC convertor 8a, can keep the longer time.In addition, the output of the 1st AC convertor 8a and the 2nd AC convertor 8b synthesized and the output that obtains, shown in Fig. 5 (c), become short, output of the rise time long output of holding time.
But, different with the situation shown in the execution mode 1, because the increase of short circuit current is slower, so the output of the 1st and the 2nd AC conversion 8a, 8b can't continue to till the time T 13 that circuital current reaches breaking current Imax.Thus, if make switch 96 remain closure, then shown in Fig. 6 (a), time T 12 before circuital current reaches breaking current Imax, power source voltage Vcc is reduced to the moved lower voltage limit V10 that is lower than control device 6 and tripgear 7, can't drive tripgear 7, its result can't carry out the action of opening circuit of circuit.
Therefore, in the present embodiment, shown in Fig. 6 (b), even the charging voltage of capacitor 93 reaches and can move lower voltage limit V10 (for example 5V) (time T 11), become the voltage level that control device 6 grades are moved, also make switch 96 keep disconnecting, not from the 1st power circuit 9 to control device 6 supply line voltages such as grade.Capacitor 93 does not discharge, and constantly will all charge from the electric energy that the 1st and the 2nd AC convertor 8a, 8b obtain.But, the voltage of capacitor 93 is supplied with to the 1st, the 2nd current sensor 3a, 3b and comparing section 12 as power supply.
The ifs circuit electric current further increases, and the output signal of the 1st and the 2nd current sensor 3a, 3b surpasses the fiducial value of comparing section 12, then exports closure signal by comparing section 12 to switch 96, makes switch 96 closures (T13).If switch 96 closures, then from the 1st power circuit 9 to control device 6, signal conversion circuit 4 and A/D translation circuit 5 supply line voltage Vcc, control device 6 compares judgement for the digital signal value of the circuital current of importing via signal conversion circuit 4 and A/D translation circuit 5 with predefined trip threshold.Because trip threshold equates with the fiducial value of comparing section 12 in the present embodiment,, finish opening circuit of DC circuit so, switch contact 2 is disconnected by tripgear 7 immediately to tripgear 7 output trip signals.
According to present embodiment, by having the 1st power circuit 9, it is based on the 1st and the 2nd AC convertor 8a, the output voltage of 8b and to control device 6 supply capabilities that are used to export trip signal, the the 1st and the 2nd AC convertor 8a, 8b output characteristic difference each other, during with short circuit current flow in circuit, size regardless of short circuit current, can be from the assigned voltage of at least 1 AC convertor acquisition more than or equal to the stipulated time, even thereby when in DC circuit, producing short circuit current, also can be to control device 6 supply powers that drive tripgear 7, the action of can opening circuit reliably.
In addition, the 1st AC convertor 8a is that the rise time of output is shorter, the AC convertor of output assigned voltage, the 2nd AC convertor 8b is that to compare the rise time long with the 1st AC convertor 8a, reach long AC convertor of magnetically saturated time, therefore in circuit during short circuit current flow, regardless of the short circuit current size, can be reliably to control device 6 supply powers that drive tripgear 7, thereby can open circuit action reliably.
In addition, owing to have the 2nd power circuit 10, its based on the voltage between lines of circuit 1a, 1b to control device 6 supply capabilities, thereby even when producing overcurrent, also can be from the 2nd power circuit 10 to control device 6 supply powers that drive tripgear 7, the action of can opening circuit reliably.
In addition, because can be by comparing section 12 controls since of the timing of the 1st power circuit 9 to supply line voltage Vcc such as control device 6, tripgears 7, even therefore in state difference along with short circuit accident, the rise time of short circuit current is slowly under the situation, also can be to supply line voltage Vcc such as control device 6 and tripgears 7, can be reliably to control device 6 supply powers that drive tripgear 7, thereby can open circuit action reliably.
Claims (4)
1. d-c circuit breaker, it has: switch contact, it makes the DC circuit on/off; Tripgear, it disconnects this switch contact; Current detecting unit, it detects the electric current of described DC circuit; And control device, the detection electric current servo-actuated of itself and this current detecting unit and to described tripgear output trip signal,
It is characterized in that having:
A plurality of AC convertor, they are arranged in the described DC circuit, and output characteristic difference each other is so that in described DC circuit during short circuit current flow, regardless of the short circuit current size, can be from the assigned voltage of at least 1 AC convertor acquisition more than or equal to the stipulated time; And the 1st power circuit, its in described DC circuit during short circuit current flow, based on the output voltage of described AC convertor to described control device supply capability.
2. d-c circuit breaker according to claim 1 is characterized in that,
As a plurality of AC convertor, be provided with: the 1st AC convertor, the rise time of its output is short, the output assigned voltage; And the 2nd AC convertor, it is compared with described the 1st AC convertor, and the rise time of output is long, and the time that reaches till the magnetic saturation is long.
3. d-c circuit breaker according to claim 1 and 2 is characterized in that,
Have the 2nd power circuit, its based on the voltage between lines of described DC circuit to described control device supply capability.
4. d-c circuit breaker according to claim 3 is characterized in that,
Have output control unit, it is based on the detection electric current of current detecting unit, the electric current of DC circuit during greater than setting from the 1st power circuit to the control device supply capability.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008275535A JP5104718B2 (en) | 2008-10-27 | 2008-10-27 | DC circuit breaker |
| JP2008-275535 | 2008-10-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101728137A true CN101728137A (en) | 2010-06-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910142200A Pending CN101728137A (en) | 2008-10-27 | 2009-06-05 | Direct current circuit-breaker |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5104718B2 (en) |
| CN (1) | CN101728137A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101649703B1 (en) * | 2015-07-17 | 2016-08-19 | 엘에스산전 주식회사 | Monitoring apparatus of contact adhesion for dc circuit breaker |
| JP6919486B2 (en) * | 2017-10-11 | 2021-08-18 | 株式会社明電舎 | DC cutoff device |
| JP6919497B2 (en) * | 2017-10-27 | 2021-08-18 | 株式会社明電舎 | DC cutoff device |
| CN109560527A (en) * | 2018-12-10 | 2019-04-02 | 国网江苏省电力有限公司经济技术研究院 | A kind of hybrid online electricity-fetching method of dc circuit breaker driving circuit |
| KR102185105B1 (en) * | 2019-03-26 | 2020-12-01 | 엘에스일렉트릭(주) | Direct current circuit breaker using power of direct current system |
| JP7251886B2 (en) * | 2019-04-02 | 2023-04-04 | 東芝エネルギーシステムズ株式会社 | control system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6226722A (en) * | 1985-07-25 | 1987-02-04 | 松下電工株式会社 | Dc breaker |
| JPH0440372A (en) * | 1990-06-05 | 1992-02-10 | Fuji Electric Co Ltd | Detection of current |
-
2008
- 2008-10-27 JP JP2008275535A patent/JP5104718B2/en not_active Expired - Fee Related
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2009
- 2009-06-05 CN CN200910142200A patent/CN101728137A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP5104718B2 (en) | 2012-12-19 |
| JP2010103048A (en) | 2010-05-06 |
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Application publication date: 20100609 |