CN105680412B - A kind of intelligent self-recovery overcurrent protector and its method of work - Google Patents

A kind of intelligent self-recovery overcurrent protector and its method of work Download PDF

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Publication number
CN105680412B
CN105680412B CN201610125221.0A CN201610125221A CN105680412B CN 105680412 B CN105680412 B CN 105680412B CN 201610125221 A CN201610125221 A CN 201610125221A CN 105680412 B CN105680412 B CN 105680412B
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China
Prior art keywords
major loop
electric current
short
switch
overcurrent
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CN201610125221.0A
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CN105680412A (en
Inventor
袁保蓉
丁威
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Jiangsu Kailong Electronics Co., Ltd.
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CHANGZHOU DONGFANG TIELU QICAI Co Ltd
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08Emergency 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 excess current
    • H02H3/093Emergency 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 excess current with timing means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/05Details with means for increasing reliability, e.g. redundancy arrangements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/06Details with automatic reconnection

Abstract

The present invention relates to a kind of intelligent self-recovery overcurrent protector and its method of work, this overcurrent protector to include:Control unit and monitoring unit, wherein control unit perform and embodied the repertoire of this overcurrent protector:The time delayed turn-off major loop when major loop excessively stream, major loop is immediately turned off when major loop short circuit, runback and intellectual determination main circuit current excessively stream or the property of short circuit after major loop disconnection;Monitoring unit to monitoring and controlling unit working condition, when control unit break down and during cisco unity malfunction, the function of disconnection major loop when being taken on by monitoring unit and being performed protector excessively stream, be short-circuit;Disposable breaker is also accessed on major loop while monitoring unit disconnects major loop, finally makes this keeping device for triple protection function, while train operation efficiency is ensured, it is ensured that coherent signal equipment and the safety of train operation.

Description

A kind of intelligent self-recovery overcurrent protector and its method of work
Technical field
The present invention relates to a kind of railway signal Protector for using electricity, more particularly to a kind of intelligent self-recovery overcurrent protector and Its method of work.
Background technology
All kinds of control power failures are to cause railway signals equipment to be unable to one of an important factor for normal reliable works.Mesh Before, the indoor excessively stream or short-circuit protector of railway signals equipment mainly use fuse or breaker, wherein, the cost of fuse is low It is honest and clean, the larger discreteness of its blow-out current value generally existing, it is especially in the presence of due to aging and causes that fuse occurs in use Fracture of wire phenomenon, serious hidden danger is brought to equipment normal operation, even double fuse equipments equally exist above drawback;Breaker Excessively stream and short circuit can be played a protective role, with technological progress, the current class of breaker continues to increase, and cuts off electric current Time and sensitivity also improve constantly, and still, breaker does not possess runback function, are particularly beaten due to power-supply fluctuation, thunder and lightning Hit, it is electrified influence, misoperation triggers short circuit and the temporary over-current or short circuit that trigger are caused in circuit breaker tripping, breaker can not Voluntarily recover conducting, it is also necessary to which artificial goes to check and recover.Such maintenance and management mode both have impact on train passage effect Rate, the labor intensity of administrative staff is added again, be not suitable with the modernization of railway.
Therefore, a kind of intelligent self-recovery overcurrent protector and its method of work are designed, to realize to railway circuital current Monitoring, protection, so as to ensure that railway traffic signal system runs well, and realize signal protector " fault-safety principle " It is required that.
The content of the invention
It is an object of the invention to provide a kind of intelligent self-recovery overcurrent protector and its method of work, to realize to track electricity Effectively protected on road.
In order to solve the above-mentioned technical problem, the invention provides a kind of overcurrent protector, including:Control unit and monitoring are single Member, wherein described control unit are adapted to detect for the electric current on major loop, and when electric current occur excessively stream or it is short-circuit when, disconnection is led back Road;The monitoring unit is suitable in control unit failure, detects the electric current on major loop, and the electric current occur new excessively stream or When short-circuit, major loop is disconnected.
Further, the overcurrent protector also includes:The the first overcurrent sensor and first being connected on major loop Short circuit current sensor, the normally closed switch controlled by described control unit is also in series with major loop;Described control unit includes: First processor module;When the electric current that the first overcurrent sensor or the first short circuit current sensor stream pass through arrives separately at or surpasses When crossing the trigger value of sensor, corresponding high level is exported, and corresponding high level is independently accessed to the excessively stream of first processor module Over-current detection end and short-circuit detecting end are accessed in test side simultaneously;When excessively stream test side is independent or over-current detection end and short-circuit detecting When end is detected simultaneously by high level, first processor module control normally closed switch disconnects;Also, make the first overcurrent sensor The electric current of triggering is not more than the electric current for making the first overcurrent sensor-triggered.
Further, the first overcurrent sensor includes:The first excessively stream inductance coil being connected on major loop, and The first magnet-sensitive switch is provided with the first excessively stream inductance coil;The first short circuit current sensor includes:It is connected on major loop On the first short circuited inductance coil, and the second magnet-sensitive switch is provided with the first short circuited inductance coil;When the first excessively stream inductor wire When the electric current that circle or the first short circuited inductance coil flow through arrives separately at corresponding magnet-sensitive switch connection value, corresponding magnet-sensitive switch will be high electric Over-current detection end and short-circuit detecting end are accessed in the flat over-current detection end for being independently accessed first processor module simultaneously, the first processing Device module control normally closed switch disconnects;Also, the electric current for connecting the first magnet-sensitive switch, which is not more than, connects the second magnet-sensitive switch Electric current.
Further, the overcurrent protector also includes:The the first excessively stream inductance coil and first being connected on major loop are short Road inductance coil, and first, second magnet-sensitive switch is respectively equipped with the first excessively stream inductance coil and the first short circuited inductance coil, The normally closed switch controlled by described control unit is also in series with major loop;
Described control unit includes:First processor module;When the first excessively stream inductance coil or the first short circuited inductance coil When the electric current flowed through arrives separately at corresponding magnet-sensitive switch connection value, high level is independently accessed first processor by corresponding magnet-sensitive switch Over-current detection end and short-circuit detecting end are accessed in the over-current detection end of module simultaneously;
When excessively stream test side is individually or when over-current detection end and short-circuit detecting end are detected simultaneously by high level, first processor Module control normally closed switch disconnects;
Also, the electric current for connecting the first magnet-sensitive switch is not more than the electric current for connecting the second magnet-sensitive switch.
Further, the first processor module is suitable to first switch delay turn-off time and the open circuit of setting over-current detection Frequency threshold value, i.e.,
When the duration of the high level at the over-current detection end of first processor module meeting that first switch delay disconnects Between when, or when its short-circuit detecting end obtain high level when, the first processor module control normally closed switch disconnect and when one section Between after Self-resetting, and record normally closed switch disconnection times, and when the number reaches breaking frequency threshold value after, then control major loop is forever Disconnect long.
Further, the major loop also parallel connection one bypasses, normal in the normally-open normally-close switch that the monitoring unit is controlled Contact series are opened in bypass, normally-closed contact is series in major loop, and a delay-action fuse is also in series with the bypass; The monitoring unit is suitable to after disconnecting major loop, while makes by-path turn-on, and police instruction electricity is also in series with the bypass Road, and after by-path turn-on, send alarm.
The overcurrent protector also includes:The second overcurrent sensor and the second short circuit current being connected on major loop Sensor, the monitoring unit include:Second processor module;When the second overcurrent sensor, the second short circuit current sense The electric current that device flows through arrive separately at or more than sensor trigger value when, export corresponding high level, and corresponding high level is independent Access the over-current detection end of second processor module or access over-current detection end and short-circuit detecting end simultaneously, second processor module Control normally-closed contact forever disconnects;Also, the second switch delay that the second processor module is suitable to setting over-current detection is disconnected ETAD expected time of arrival and departure, and second switch delay turn-off time is more than first switch delay turn-off time;And sense the second overcurrent The electric current of device triggering is not less than the electric current for making the first overcurrent sensor, makes the electric current of the second short circuit current sensor-triggered not Less than the electric current for making the first short circuit current sensor-triggered, being not more than the electric current of the second overcurrent sensor-triggered makes second The electric current of short circuit current sensor-triggered;In control unit failure, when the height electricity at the over-current detection end of second processor module The flat duration meets that second switch is delayed turn-off time, or when its short-circuit detecting end obtains high level, the second processing Device module control major loop forever disconnects.
Further, the second overcurrent sensor includes:The second excessively stream inductance coil being connected on major loop, The 3rd magnet-sensitive switch is provided with second excessively stream inductance coil;The second short circuit current sensor includes:It is connected on major loop The second short circuited inductance coil, the 4th magnet-sensitive switch is provided with the second short circuited inductance coil;When the second excessively stream inductance coil, When the electric current that two short circuited inductance coils flow through arrives separately at corresponding magnet-sensitive switch connection value, corresponding magnet-sensitive switch is independent by high level Access the over-current detection end of second processor module or access over-current detection end and short-circuit detecting end simultaneously, second processor module Control normally-closed contact forever disconnects;And the electric current for connecting the 3rd magnet-sensitive switch is not less than the electricity for connecting the first magnet-sensitive switch Stream, the electric current that the 4th magnet-sensitive switch is connected is not less than the electric current for connecting the second magnet-sensitive switch, connect the 3rd magnet-sensitive switch Electric current be not more than make the 4th magnet-sensitive switch connect electric current.
Another aspect, present invention also offers a kind of method of work of overcurrent protector.
Wherein, the overcurrent protector includes:Control unit and monitoring unit;The method of work includes:Pass through control Unit detection major loop on electric current, and when electric current occur excessively stream or it is short-circuit when, disconnect major loop;And in control unit failure When, the electric current on major loop is detected by monitoring unit, and the electric current occur new excessively stream or it is short-circuit when, disconnect major loop.
Further, described control unit is suitable to when overcurrent occurs in major loop, and delay disconnects major loop, and waits one It is Self-resetting after the section time, and records normally closed switch disconnection times, and when the number reaches the default open circuit time of control unit After number threshold value, then major loop is controlled forever to disconnect;Described control unit is further adapted for, when short circuit current occurs in major loop, immediately breaking Major loop is opened, is Self-resetting after a period of time, and records normally closed switch disconnection times, and when the number reaches the open circuit time After number threshold value, then major loop is controlled forever to disconnect;The major loop realized by control unit forever disconnects, suitable for passing through reset switch Resetted.
Further, the major loop also parallel connection one bypasses, normal in the normally-open normally-close switch that the monitoring unit is controlled Contact series are opened in bypass, normally-closed contact is series in major loop, and a delay-action fuse is also in series with the bypass; When new overcurrent occurs in major loop, delay disconnects major loop;Or when new short circuit current occurs in major loop, master is disconnected immediately Loop, and after major loop disconnection, while make by-path turn-on.
The invention has the advantages that the intelligent self-recovery overcurrent protector and its method of work of the present invention avoid tradition Protector need manual reset, current detection accuracy is low, the technical problem easily judged by accident;Using intelligentized control, that is, exist Major loop is disconnected again after repeatedly judging excessively stream, avoids erroneous judgement, and configuration switch delay turn-off time ensure that current detecting essence Degree, also improve the accuracy for judging overcurrent or short circuit;And present invention also offers control unit, and major loop is carried out Monitoring in real time, and additionally provides monitoring unit, with control unit failure, it is invalid when enable, protector is also had certain Protective effect, triple protection function is also finally realized by the delay-action fuse in bypass so that final to realize that " failure is led To safety " requirement;Therefore, this overcurrent protector has the advantages of simple in construction, good reliability, safe, be adapted to interference it is big, And protection requires high place.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the theory diagram of the overcurrent protector of the present invention.
In figure:First excessively stream inductance coil LAG, the first short circuited inductance coil LAD, the second excessively stream inductance coil LBG, it is second short Road inductance coil LBD, it is the first magnet-sensitive switch S1, the second magnet-sensitive switch S2, the 3rd magnet-sensitive switch S3, the 4th magnet-sensitive switch S4, normally closed Switch KAB, normally-open normally-close switch in normally-closed contact KBB, normally-open normally-close switch in normally opened contact KBK, delay-action fuse Fu, electricity Hinder R, lamp L.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
Embodiment 1
As shown in figure 1, the present embodiment 1 provides a kind of overcurrent protector, including:Control unit and monitoring unit, wherein Described control unit is adapted to detect for the electric current on major loop, and when electric current occur excessively stream or it is short-circuit when, disconnect major loop;The prison Control unit to be suitable in control unit failure, detect the electric current on major loop, and the electric current occur new excessively stream or it is short-circuit when, break Open major loop.
Wherein, judge that the current value of new excessively stream or short circuit is more than the excessively stream involved by described control unit or the electric current of short circuit Value.
The overcurrent protector also includes:The first overcurrent sensor and the first short circuit current being connected on major loop Sensor, the normally closed switch K controlled by described control unit is also in series with major loopAB;Described control unit includes:At first Manage device module;When the electric current that the first overcurrent sensor or the first short circuit current sensor stream pass through arrives separately at or more than sensing During device trigger value, export corresponding high level, and by corresponding high level be independently accessed first processor module over-current detection end or Access over-current detection end and short-circuit detecting end simultaneously;
When excessively stream test side is individually or when over-current detection end and short-circuit detecting end are detected simultaneously by high level, first processor Module control normally closed switch KABDisconnect.
Preferably, the first overcurrent sensor includes:The first excessively stream inductance coil L being connected on major loopAG, And in the first excessively stream inductance coil LAGInside it is provided with the first magnet-sensitive switch S1;The first short circuit current sensor includes:It is connected on The first short circuited inductance coil L on major loopAD, and in the first short circuited inductance coil LADInside it is provided with the second magnet-sensitive switch S2.
(using inductance coil, caused magnetic field realizes that magnet-sensitive switch is led to first, second magnet-sensitive switch after powered up It is logical), as the first excessively stream inductance coil LAGOr the first short circuited inductance coil LADThe electric current flowed through arrives separately at corresponding magnet-sensitive switch and connect During logical value, high level is independently accessed the over-current detection end of first processor module or accesses excessively stream simultaneously and examined by corresponding magnet-sensitive switch Survey end and short-circuit detecting end;
When excessively stream test side is individually or when over-current detection end and short-circuit detecting end are detected simultaneously by high level, first processor Module control normally closed switch KABDisconnect;
Also, make the first magnet-sensitive switch S1 connect electric current (overcurrent, it can be set as rated current I01.3 Times, i.e. 1.3I0) no more than make the second magnet-sensitive switch S2 connect electric current (short circuit current, it can be set as 3I0)。
Wherein, magnet-sensitive switch for example and be not limited to using tongue tube, magnetic reed switch.
Further, because this overcurrent protector is used for track traffic, and because the interference of working environment is extremely serious, it is Avoid judging by accident, therefore, configuration switch delay turn-off time, using the follow current of acquisition as criterion.Specifically , the first processor module is suitable to first switch delay (delay turn-off time turn-off time t1 of setting over-current detection T1 can with and be not limited to be set as 2,3 or 6 seconds) and breaking frequency threshold value (threshold value can be 3,4,5, preferably 3 times), i.e.,
When the duration of the high level at the over-current detection end of first processor module meeting that first switch delay disconnects Between when, or when its short-circuit detecting end obtains high level, first processor module control normally closed switch KABDisconnect and treat one section Self-resetting after time, and normally closed switch disconnection times are recorded, and after the number reaches breaking frequency threshold value, then control major loop It is permanent to disconnect.
The major loop realized by control unit forever disconnects, suitable for being resetted by reset switch.The reset switch with First processor module is connected.
The major loop also parallel connection one bypasses, and the input of the bypass is connected with the input of major loop, its output end with The output end of major loop is connected;Normally opened contact K in the normally-open normally-close switch that the monitoring unit is controlledBKIt is series at bypass In, normally-closed contact KBBIt is series in major loop, and a delay-action fuse Fu is also in series with the bypass;The monitoring unit After disconnecting major loop, while make by-path turn-on.
Wherein, the normally closed switch KABIt can be realized with normally-open normally-close switch using electronic switch.
Police instruction circuit is also in series with the bypass, and after by-path turn-on, sends alarm.As in Fig. 1 resistance R with Lamp L in parallel resistance R forms a luminous alarm indicating circuit.After staff sees that lamp L is lighted, it can just find to control in time Unit has occurred and that failure, and monitoring unit serves control action, is currently played a protective role by delay-action fuse Fu.
The overcurrent protector also includes:The second overcurrent sensor and the second short circuit current being connected on major loop Sensor, the monitoring unit include:Second processor module;When the second overcurrent sensor, the second short circuit current sense The electric current that device flows through arrive separately at or more than sensor trigger value when, export corresponding high level, and corresponding high level is independent Access the over-current detection end of second processor module or access over-current detection end and short-circuit detecting end simultaneously, second processor module Control normally-closed contact forever disconnects;
Also, second switch delay turn-off time t2 of the second processor module suitable for setting over-current detection, and the Two switch time delay turn-off time t2 are more than first switch delay turn-off time t1, i.e. t2 > t1;And pass the second overcurrent The electric current of sensor triggering is not less than the electric current for making the first overcurrent sensor, makes the electric current of the second short circuit current sensor-triggered Not less than the electric current for making the first short circuit current sensor-triggered, make the electric current of the second overcurrent sensor-triggered no more than making the The electric current of two short circuit current sensor-triggereds;
In control unit failure, meet the when the duration of the high level at the over-current detection end of second processor module Two switch time delay turn-off times, or when its short-circuit detecting end obtains high level, second processor module control major loop is forever Disconnect long.
The second overcurrent sensor includes:The second excessively stream inductance coil L being connected on major loopBG, second The 3rd magnet-sensitive switch S3 is provided with excessively stream inductance coil;The second short circuit current sensor includes:It is connected on major loop Second short circuited inductance coil LBD, the 4th magnet-sensitive switch S4 is provided with the second short circuited inductance coil.
As the second excessively stream inductance coil LBG, the second short circuited inductance coil LBDThe electric current flowed through arrives separately at corresponding magnetosensitive and opened When closing connection value, high level is independently accessed the over-current detection end of second processor module or accessed simultaneously by corresponding magnet-sensitive switch Flow test side and short-circuit detecting end;When excessively stream test side individually or over-current detection end and short-circuit detecting end are detected simultaneously by high level When, second processor module control normally-closed contact KBBIt is permanent to disconnect.
Allow the 3rd magnet-sensitive switch connect electric current (new overcurrent is set to >=1.3I0, such as 1.4I0) not less than making The electric current that first magnet-sensitive switch is connected, the electric current that the 4th magnet-sensitive switch is connected is set to be not less than the electric current for connecting the second magnet-sensitive switch (new short circuit current can be set to >=3I0, such as 3.1I0);The electric current (new overcurrent) for connecting the 3rd magnet-sensitive switch is not more than The electric current (new short circuit current) for connecting the 4th magnet-sensitive switch.
In control unit failure, meet the when the duration of the high level at the over-current detection end of second processor module Two switch time delay turn-off time t2, or when its short-circuit detecting end obtains high level, second processor module control major loop It is permanent to disconnect.
Due to t2 > t1, then when control unit for when breaking down, the detection priority of control unit is higher than monitoring unit.
Therefore, this overcurrent protector has triple protection function, i.e., first control unit is protected, and then monitoring unit enters Row protection, last delay-action fuse Fu can also play a protective role.
The lithium battery that the high level is derived from this overcurrent protector provides, i.e., will after the conducting of corresponding magnet-sensitive switch The output voltage of lithium battery uses as high level.
Embodiment 2
On the basis of embodiment 1, the present embodiment 2 provides a kind of method of work of overcurrent protector.
The overcurrent protector includes:Control unit and monitoring unit;
The method of work includes:Electric current on major loop is detected by control unit, and when excessively stream or short occurs in electric current Lu Shi, disconnect major loop;And in control unit failure, the electric current on major loop is detected by monitoring unit, and in the electricity The existing new excessively stream of outflow or it is short-circuit when, disconnect major loop.
Further, described control unit is suitable to when overcurrent occurs in major loop, and delay disconnects major loop, and waits one It is Self-resetting after the section time, and records normally closed switch disconnection times, and when the number reaches the default open circuit time of control unit After number threshold value, then major loop is controlled forever to disconnect;If specific overcurrent is also present, delay again disconnects major loop, weight It is permanent to disconnect major loop if overcurrent is also present after answering several times;Described control unit is further adapted for short in major loop appearance During the electric current of road, major loop is disconnected immediately, is Self-resetting after a period of time, and records normally closed switch disconnection times, and works as this time After number reaches the breaking frequency threshold value, then major loop is controlled forever to disconnect;If specific short circuit current is also present, break again Open major loop, it is permanent to disconnect major loop if short circuit current is also present after repeated several times;The master realized by control unit returns Road forever disconnects, suitable for being resetted by reset switch.
Further, the major loop also parallel connection one bypasses, normal in the normally-open normally-close switch that the monitoring unit is controlled Contact series are opened in bypass, normally-closed contact is series in major loop, and a delay-action fuse is also in series with the bypass; When new overcurrent occurs in major loop, delay disconnects major loop;Or when new short circuit current occurs in major loop, master is disconnected immediately Loop, and after major loop disconnection, while make by-path turn-on.
Wherein, overcurrent, short circuit current and new overcurrent, new short circuit current are illustrated in embodiment 1.
It is complete by above-mentioned description, relevant staff using the above-mentioned desirable embodiment according to the present invention as enlightenment Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention Property scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.

Claims (8)

  1. A kind of 1. overcurrent protector, it is characterised in that including:Control unit and monitoring unit, wherein
    Described control unit is adapted to detect for the electric current on major loop, and when electric current occur excessively stream or it is short-circuit when, disconnect major loop;
    The monitoring unit is suitable in control unit failure, detects the electric current on major loop, and new excessively stream occur in the electric current Or when short-circuit, disconnect major loop;
    The major loop also parallel connection one bypasses,
    Normally opened contact in the normally-open normally-close switch that the monitoring unit is controlled is series in bypass, and normally-closed contact is series at master In loop, and
    A delay-action fuse is also in series with the bypass;
    The monitoring unit is suitable to after disconnecting major loop, while makes by-path turn-on;
    Also, police instruction circuit is also in series with the bypass, and after by-path turn-on, sends alarm.
  2. 2. overcurrent protector according to claim 1, it is characterised in that
    The overcurrent protector also includes:The first overcurrent sensor being connected on major loop and the first short circuit current sensing Device, the normally closed switch controlled by described control unit is also in series with major loop;
    Described control unit includes:First processor module;
    When the electric current that the first overcurrent sensor or the first short circuit current sensor stream pass through arrives separately at or more than sensor During trigger value, corresponding high level is exported, and corresponding high level is independently accessed to the over-current detection end or same of first processor module When access over-current detection end and short-circuit detecting end so that first processor module control normally closed switch disconnects;
    Also, the electric current of the first overcurrent sensor-triggered is set to be not more than the electric current for making the first overcurrent sensor-triggered.
  3. 3. overcurrent protector according to claim 2, it is characterised in that
    The first overcurrent sensor includes:The first excessively stream inductance coil being connected on major loop, and in the first excessively stream The first magnet-sensitive switch is provided with inductance coil;
    The first short circuit current sensor includes:The first short circuited inductance coil being connected on major loop, and in the first short circuit The second magnet-sensitive switch is provided with inductance coil;
    When the electric current that the first excessively stream inductance coil or the first short circuited inductance coil flow through arrives separately at corresponding magnet-sensitive switch connection value When, high level is independently accessed the over-current detection end of first processor module or accesses over-current detection end simultaneously by corresponding magnet-sensitive switch With short-circuit detecting end, first processor module control normally closed switch disconnects;
    Also, the electric current for connecting the first magnet-sensitive switch is not more than the electric current for connecting the second magnet-sensitive switch.
  4. 4. overcurrent protector according to claim 3, it is characterised in that the first processor module is suitable to setting excessively stream The first switch delay turn-off time of detection and breaking frequency threshold value, i.e.,
    When the duration of the high level at the over-current detection end of first processor module meeting first switch delay turn-off time, Or when its short-circuit detecting end obtain high level when, the first processor module control normally closed switch disconnect and after a period of time from Reset, and record normally closed switch disconnection times, and after the number reaches breaking frequency threshold value, then control major loop forever to break Open.
  5. 5. overcurrent protector according to claim 4, it is characterised in that
    The overcurrent protector also includes:The second overcurrent sensor being connected on major loop and the second short circuit current sensing Device,
    The monitoring unit includes:Second processor module;
    When the second overcurrent sensor, the second short circuit current sensor stream pass through electric current arrive separately at or more than sensor touch During hair value, corresponding high level is exported, and corresponding high level is independently accessed to the over-current detection end or simultaneously of second processor module Over-current detection end and short-circuit detecting end are accessed, second processor module control normally-closed contact forever disconnects;
    Also, the second processor module is suitable to the second switch delay turn-off time of setting over-current detection, and second switch Turn-off time be delayed more than first switch delay turn-off time;And
    The electric current of the second overcurrent sensor-triggered is not less than the electric current for making the first overcurrent sensor, make the second short circuit The electric current of current sensor triggering is not less than the electric current for making the first short circuit current sensor-triggered, makes the second overcurrent sensor The electric current of triggering is not more than the electric current for making the second short circuit current sensor-triggered;
    In control unit failure, meet that second opens when the duration of the high level at the over-current detection end of second processor module Close delay turn-off time, or when its short-circuit detecting end obtains high level, second processor module control major loop forever breaks Open.
  6. 6. overcurrent protector according to claim 5, it is characterised in that
    The second overcurrent sensor includes:The second excessively stream inductance coil being connected on major loop, in the second excessively stream electricity The 3rd magnet-sensitive switch is provided with sense coil;
    The second short circuit current sensor includes:The second short circuited inductance coil being connected on major loop, in the second short circuit electricity The 4th magnet-sensitive switch is provided with sense coil;
    When the electric current that the second excessively stream inductance coil, the second short circuited inductance coil flow through arrives separately at corresponding magnet-sensitive switch connection value When, high level is independently accessed the over-current detection end of second processor module or accesses over-current detection end simultaneously by corresponding magnet-sensitive switch With short-circuit detecting end, second processor module control normally-closed contact forever disconnects;And
    The electric current for connecting the 3rd magnet-sensitive switch is not less than the electric current for connecting the first magnet-sensitive switch, connects the 4th magnet-sensitive switch Electric current be not less than the electric current for connecting the second magnet-sensitive switch, make the electric current that the 3rd magnet-sensitive switch is connected no more than making the 4th magnetosensitive The electric current of switch connection.
  7. A kind of 7. method of work of overcurrent protector, it is characterised in that
    The overcurrent protector includes:Control unit and monitoring unit;
    The method of work includes:By control unit detect major loop on electric current, and when electric current occur excessively stream or it is short-circuit when, Disconnect major loop;And
    In control unit failure, the electric current on major loop is detected by monitoring unit, and new excessively stream or short occur in the electric current Lu Shi, disconnect major loop;
    The major loop also parallel connection one bypasses,
    Normally opened contact in the normally-open normally-close switch that the monitoring unit is controlled is series in bypass, and normally-closed contact is series at master In loop, and
    A delay-action fuse is also in series with the bypass;
    When new overcurrent occurs in major loop, delay disconnects major loop;Or when new short circuit current occurs in major loop, break immediately Major loop is opened, and
    After major loop disconnects, while make by-path turn-on.
  8. 8. method of work according to claim 7, it is characterised in that
    Described control unit is suitable to when overcurrent occurs in major loop, and delay disconnects major loop, and after waiting for a period of time i.e. Self-resetting, and record normally closed switch disconnection times, and after the number reaches control unit default breaking frequency threshold value, then Control major loop forever disconnects;
    Described control unit is further adapted for, when short circuit current occurs in major loop, disconnecting major loop immediately, after a period of time i.e. certainly Reset, and record normally closed switch disconnection times, and after the number reaches the breaking frequency threshold value, then control major loop permanent Disconnect;
    The major loop realized by control unit forever disconnects, suitable for being resetted by reset switch.
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CN106655101A (en) * 2016-10-31 2017-05-10 广东美的制冷设备有限公司 Household electrical appliance and over-current protection device and method of power factor corrector
CN106655102A (en) * 2016-10-31 2017-05-10 广东美的制冷设备有限公司 Power factor corrector over-current protection device and home appliance
JP2018102065A (en) * 2016-12-20 2018-06-28 株式会社オートネットワーク技術研究所 Power supply control device
CN112310938A (en) * 2019-07-31 2021-02-02 华为技术有限公司 Local side equipment, power supply system, electric shock protection method and device
CN110970866A (en) * 2019-11-14 2020-04-07 华为技术有限公司 Contactor control device and power supply system

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