CN1808666A - Plastic-enclosed DC circuit breaker with three-stage protection function - Google Patents
Plastic-enclosed DC circuit breaker with three-stage protection function Download PDFInfo
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- CN1808666A CN1808666A CN 200610038387 CN200610038387A CN1808666A CN 1808666 A CN1808666 A CN 1808666A CN 200610038387 CN200610038387 CN 200610038387 CN 200610038387 A CN200610038387 A CN 200610038387A CN 1808666 A CN1808666 A CN 1808666A
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Abstract
This invention relates to plastic direct current breaker with three sections of protection functions of overload time lag, shortcut time lag and shortcut instant protection. The invention provides the technique scheme, which comprises the following steps: forming two electrodes in the base socket with two arc eliminating devices probe system; connecting the overload time lag and shortcut instant removing device at one electrode and connecting trigger device and shortcut time lag control device at other electrode; the shortcut time lag control device separates with the eliminating device; the overload time lag eliminating device is connected to the instant eliminating device drive bar.
Description
Technical field
The present invention relates to a kind of plastic-enclosed DC circuit breaker with overload long delay, short circuit short time delay and instantaneous three-stage protection function of short circuit.
Background technology
Power engineering must possess safe and reliable control power supply, and the control power supply is divided into two classes: a class is a DC power supply, and a class is an AC power.Because DC power supply is independent of outside the ac power power-supply system, is not subjected to the influence of AC power supply system accident, has advantages such as safe and reliable, that operation maintenance is convenient, thereby be used widely.
Along with the control load and the living load of power plant, transformer station are more and more higher to the requirement of DC power supply; overload protection, the short-circuit protection of its protection electrical equipment require also very strict; it does not answer tripping; do not answer malfunction yet; especially do not allow the malfunction of bypassing the immediate leadership, otherwise will cause the damage of power equipment and the system failure, accident to involve expanded range even cause serious accidents such as large-area power-cuts.For guaranteeing the power equipment safety operation, claimed electrical equipment (dc circuit breaker) is accurate, reliable, the fast shut-off fault current.Present plastic-enclosed DC circuit breaker only has overload long delay and short circuit instantaneous protection, can not well meet the demands.
Summary of the invention
The purpose of this invention is to provide a kind of plastic-enclosed DC circuit breaker with three-stage protection function; this circuit breaker adopts electronic-controlled installation to realize short circuit short time delay, bimetal leaf realization overload long delay and the instantaneous three section protection of high-speed double electromagnet short circuit, has guaranteed the reliability of circuit breaker function.
According to technical scheme provided by the present invention, the contact system of two band arc-control devices is arranged in pedestal, form two utmost points; And interconnective separation release and draw bar; Extremely go up connection overload long delay release and short circuit instantaneous release for one therein; Another is extremely gone up and connects short circuit short time delay trigger equipment and short circuit short time delay control device, and the output of short circuit short time delay trigger equipment is connected with the input of short circuit short time delay control device, and the output of short circuit short time delay control device is connected with shunt release; Overload long delay release is connected with draw bar respectively with the short circuit instantaneous release.
Short circuit short time delay trigger equipment is made of electromagnet and sensitive switch, and short circuit short time delay control device is made of control circuit.Overload long delay release mainly is made of bimetal leaf.In control circuit, the output of dc circuit breaker contact is connected with signal converter, and the output of signal converter is connected with isolator, and the output of isolator is connected with driver, and the output of driver is connected with release; When the closing of contact of dc circuit breaker, there has been signal the contact, and this signal passed to signal converter, signal converter produces the time-delay of 30 milliseconds (or 60 milliseconds), this time-delay places 30 milliseconds of high potentials (or 60 milliseconds) with the input of isolator, the output of isolator is an electronegative potential, forces driver to end, and release can not be threaded off.
The present invention can realize that the overload long delay threads off and short circuit instantaneous trip function on extremely at one of circuit breaker, extremely go up at another, move by the electromagnet in the short circuit short time delay trigger equipment, drive a contact signal and give short circuit short time delay control device, this device is through after the time-delay of certain hour, send the instruction of threading off to shunt release, make circuit breaker tripping by draw bar by shunt release.
The plastic-enclosed DC circuit breaker of the present invention's design has overload long delay, short circuit short time delay and the instantaneous three-stage protection function of short circuit, has characteristics such as breaking capacity height, arcing is short, the short circuit short time delay is accurate.Particularly increase short circuit short time delay function, realized the full selectivity of system.
Description of drawings
Fig. 1 is the circuit breaker graphical diagram.
Fig. 2 is the circuit breaker outline drawing.
Fig. 3 is the flow chart of Fig. 5.
Fig. 4 is breaker structure figure.
Fig. 5 is a short circuit short time delay control device schematic diagram.
Embodiment
The contact system of band arc-control device as shown in Figure 3,1; 2, overload long delay release; 3, short circuit instantaneous release; 5, draw bar; 6, shunt release; 7, short circuit short time delay control device; 8, pedestal; 9, short circuit short time delay trigger equipment.
The contact system 1 that two band arc-control devices are arranged in pedestal 8 forms two utmost points; And interconnective separation release 6 and draw bar 5; Extremely go up connection overload long delay release 2 and short circuit instantaneous release 3 for one therein; Another is extremely gone up and connects short circuit short time delay trigger equipment 9 and short circuit short time delay control device 7, and, the output of short circuit short time delay trigger equipment 9 is connected with the input of short circuit short time delay control device 7, and the output of short circuit short time delay control device 7 is connected with shunt release 6; Overload long delay release 2 is connected with draw bar 5 respectively with short circuit instantaneous release 3.Short circuit short time delay trigger equipment 9 is made of electromagnet and sensitive switch, and short circuit short time delay control device 7 is to be made of control circuit.Overload long delay release 2 mainly is made of bimetal leaf.
When overload occurring in the circuit, overload current makes the conductive plate heating that connects conducting system, and heat is passed to overload long delay release 2, overload long delay release 2 mainly is made of bimetal leaf, under the effect of heat, produce bending, promote draw bar 5 and make circuit breaker tripping, fault current is excised; When short circuit occurring, the circuit breaker among the present invention will be handled respectively according to the size of short circuit current: if a short circuit current more than or equal to 5 times of rated operational current, and less than wink of setting during streaming current, then starts short circuit short time delay functional module 4.Short circuit short time delay functional module 4 is made up of short circuit short time delay trigger equipment 9 and short circuit short time delay control device 7, and short circuit short time delay trigger equipment 9 is made of electromagnet and sensitive switch, and short circuit short time delay control device 7 is to be made of control circuit, and its schematic diagram is seen Fig. 4.The course of work of short circuit short time delay functional module 4: send triggering signal by short circuit short time delay trigger equipment 9, after short circuit short time delay control device 7 obtains signal, delay time, after time-delay reaches predefined value, send the instruction of threading off, move draw bar 5 by shunt release 6 and make circuit breaker tripping, promptly the dynamic/static contact of circuit breaker separately.If two short circuit currents then by 3 actions of short circuit instantaneous release, make circuit breaker tripping by draw bar 5 greater than wink of setting during streaming current, rapidly fault current is excised.
Fig. 5 is and the corresponding flow chart of Fig. 4.Among Fig. 5: the contact 10 of dc circuit breaker is J1-S1, J2-S1, and signal converter 11 comprises U1, R1, R2, R3, C1, and isolator 12 is made up of U2, R4, and driver 13 is made up of U4, U5, R5, R6, and release 14 is made of L1.Wherein, the output of dc circuit breaker contact 10 is connected with signal converter 11, and the output of signal converter 11 is connected with isolator 12, and the output of isolator 12 is connected with driver 13, and the output of driver 13 is connected with release 14.
J1-S1, J2-S1 are switched on when 10 closures of the contact of dc circuit breaker, there has been signal contact 10 and this signal has been passed to signal converter 11, U1 in the signal converter 11, R3, C1 have just produced 30 milliseconds time-delay, this time-delay is put 30 milliseconds of high potentials with the input of U2 in the isolator 12, and the output of isolator 12 is electronegative potentials.The output of isolator 12 connects driver 13.The input of driver 13 is connected with the output of isolator 12, forces the input of U4 in the driver 13 to end.Just make the output of U5 also be cut-off state because the input of U4 output in the driver 13 and U5 is connected, L1 release 14 can not be threaded off.
If the contact 10 of dc circuit breaker is also closed after 30 milliseconds, at this moment the time-delay of the signal converter among Fig. 5 11 finishes, isolator 12 outputs become high potential by electronegative potential, connected 13 also from the low height that becomes, U5 conducting output produces current drives L1, makes release 14 actions with circuit breaker tripping.
Claims (4)
1, have the plastic-enclosed DC circuit breaker of three-stage protection function, it is characterized in that:
The contact system (1) that two band arc-control devices are arranged in pedestal (8) forms two utmost points;
And interconnective separation release (6) and draw bar (5);
Extremely go up connection overload long delay release (2) and short circuit instantaneous release (3) for one therein;
Another is extremely gone up and connects short circuit short time delay trigger equipment (9) and short circuit short time delay control device (7), and, the output of short circuit short time delay trigger equipment (9) is connected with the input of short circuit short time delay control device (7), the output of short circuit short time delay control device (7) with separate release (6) and be connected;
Overload long delay release (2) is connected with draw bar (5) respectively with short circuit instantaneous release (3).
2, have the plastic-enclosed DC circuit breaker of three-stage protection function according to claim 1, it is characterized in that: short circuit short time delay trigger equipment (9) is made of electromagnet and sensitive switch, and short circuit short time delay control device (7) is made of control circuit.
3, have the plastic-enclosed DC circuit breaker of three-stage protection function according to claim 1, it is characterized in that: overload long delay release (2) mainly is made of bimetal leaf.
4, as having the plastic-enclosed DC circuit breaker of three-stage protection function as described in the claim 2, it is characterized in that: in control circuit, the output of dc circuit breaker contact (10) is connected with signal converter (11), the output of signal converter (11) is connected with isolator (12), the output of isolator (12) is connected with driver (13), and the output of driver (13) is connected with release (14); When the contact (10) of dc circuit breaker is closed, there has been signal contact (10), and this signal passed to signal converter (11), signal converter (11) produces 30 milliseconds time-delay, this time-delay places 30 milliseconds of high potentials with the input of isolator (12), the output of isolator (12) is an electronegative potential, forces driver (13) to end, and release (14) can not be threaded off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610038387 CN1808666A (en) | 2006-02-16 | 2006-02-16 | Plastic-enclosed DC circuit breaker with three-stage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610038387 CN1808666A (en) | 2006-02-16 | 2006-02-16 | Plastic-enclosed DC circuit breaker with three-stage protection function |
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| Publication Number | Publication Date |
|---|---|
| CN1808666A true CN1808666A (en) | 2006-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610038387 Pending CN1808666A (en) | 2006-02-16 | 2006-02-16 | Plastic-enclosed DC circuit breaker with three-stage protection function |
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| Country | Link |
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| CN (1) | CN1808666A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546679B (en) * | 2009-04-14 | 2012-01-11 | 浙江大华开关厂 | Single-phase circuit breaker |
| CN101807497B (en) * | 2009-02-17 | 2014-10-15 | 施耐德电器工业公司 | Direct-current circuit breaker with selectivity |
| CN107742880A (en) * | 2017-11-24 | 2018-02-27 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of intelligent DC protection device and guard method |
| CN108493072A (en) * | 2018-03-19 | 2018-09-04 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of high current frame-type dc circuit breaker short circuit delay tunable arrangement |
| CN109149508A (en) * | 2018-05-25 | 2019-01-04 | 江苏凯隆电器有限公司 | A kind of circuit breaker internal redundancy protection architecture and its guard method |
-
2006
- 2006-02-16 CN CN 200610038387 patent/CN1808666A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807497B (en) * | 2009-02-17 | 2014-10-15 | 施耐德电器工业公司 | Direct-current circuit breaker with selectivity |
| CN101546679B (en) * | 2009-04-14 | 2012-01-11 | 浙江大华开关厂 | Single-phase circuit breaker |
| CN107742880A (en) * | 2017-11-24 | 2018-02-27 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of intelligent DC protection device and guard method |
| CN107742880B (en) * | 2017-11-24 | 2024-04-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Intelligent direct current protection device and protection method |
| CN108493072A (en) * | 2018-03-19 | 2018-09-04 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of high current frame-type dc circuit breaker short circuit delay tunable arrangement |
| CN109149508A (en) * | 2018-05-25 | 2019-01-04 | 江苏凯隆电器有限公司 | A kind of circuit breaker internal redundancy protection architecture and its guard method |
| CN109149508B (en) * | 2018-05-25 | 2024-03-12 | 江苏凯隆电器有限公司 | Circuit breaker internal redundancy protection structure and protection method thereof |
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