Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of arc light protection systems.
The purpose of the present invention is achieved through the following technical solutions: arc light protection system, including electric arc protection
Device, one or more arc light expanding elements, arc photosensor, current protection unit, protection for feed line unit and monitoring of working condition list
Member, the arc light protective device are connected with current protection unit and one or more arc light expanding elements respectively by interchanger
It connects, the arc light expanding element is connect with multiple arc photosensors.
Further, the tripping output port of the arc light protective device respectively with the high-voltage end of the first transformer and low
The breaker and busbar breaker of pressure side connect, and the current detecting end of the arc light protective device is become by current line with first
First current sensor of the low-pressure side of depressor connects, the arc light sensor input interface of the arc light protective device also with it is multiple
Arc photosensor connection.
Further, the tripping output port of the current protection unit respectively with the high-voltage end and low pressure of the second transformer
The breaker at end connects, and the current detecting end of the arc light protective device passes through current line and the low-pressure side of the second transformer
The connection of second current sensor.
Further, first low-voltage bus bar is connect by busbar breaker with the second low-voltage bus bar, the arclight
Protective device is also connect with protection for feed line unit and monitoring of working condition unit.
Further, the arc light protective device includes casing and internal circuit board, is set on the main panel of the casing
There are liquid crystal display, a variety of LED lights, function button and guide key, it is defeated that the rear panel of the casing is equipped with alternating current
Incoming interface, arc light sensor input interface, tripping output port, clock sync cap, communication interface, monitoring interface, expansion interface
With environmental data input interface;
Further, the LED light includes that power supply indicator, run indicator, synchro light, device refer to extremely
Show lamp, environmental monitoring indicator light, the out-of-limit indicator light of electric current, the out-of-limit indicator light of arc light, tripping indicator light and maintenance indicator light.
Further, the function button includes returning to key F1, upper function pages key F2, next function pages to press
Key F3, main interface key F4 and reset key are returned to.
Further, the guide key includes key on direction, square down button, direction left button, the right key in direction
With confirmation OK key.
Further, the function button and/or guide key are touch key-press, and the liquid crystal display is to touch display
Screen.
Further, the touch key-press and touch display screen together as one.
Further, the monitoring of working condition unit includes Temperature Humidity Sensor, radio temperature sensor, fuel gas sensing
Device, wireless humidity sensor, leakage current test unit and leakage current sensor.
The beneficial effects of the present invention are: the present invention is designed using distributed mode, it is suitable as the protection of mesolow double-bus,
Has flexible attributes of network.Wherein protection for feed line unit, which can be individually formed, minimizes protection system, and separately protected feeder line is to subtract
Minor accident scope of power outage.Feeder unit also can run on centralized monitoring mode, pass through arc light protective device dispatching communication.This hair
Bright electric arc protection uses detection arc light and electric current for input quantity, can individually as overcurrent protection, pure arc protection and arc light and
The double criterion protections of overcurrent.This system have principle is simple, reliable in action rapidly, to primary equipment without particular/special requirement, be adapted to it is each
The advantages of kind method of operation.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing, but protection scope of the present invention is not limited to
It is as described below.
As shown in Figure 1, arc light protection system is a Real-Time Distributed System, provided for terminal user a variety of flexible
Assembled scheme.Mainly by arc light protective device, one or more arc light expanding element, arc photosensor, current protection unit,
The composition such as protection for feed line unit and monitoring of working condition unit.
Arc light protective device is the core of arc light protection system, is responsible for information taken, the logic analysis, failure of system
Judgement and tripping control, while all expanding elements are managed, Centralized Monitoring can also be carried out to feeder unit.
Protection for feed line unit can acquire 4 road arc lights, 4 road TA current acquisition channels, i.e. maximum can be achieved adjacent 2
The arc light and current protection of feeder line, realize quick disengagement failure.
Arc light expanding element: expansible 16 road arc light acquisition channel.
Current protection unit: expansible 6 road TA current acquisition channel and tripping channel.
Arc sensor: being responsible for detection arc light information, is digital signal by arc light intensity-conversion.
Heretofore described arc light protective device by interchanger respectively with current protection unit and one or more arc
The connection of light expanding element, the arc light expanding element are connect with multiple arc photosensors.
Further, the tripping output port of the arc light protective device respectively with the high-voltage end of the first transformer and low
The breaker and busbar breaker of pressure side connect, and the current detecting end of the arc light protective device is become by current line with first
First current sensor of the low-pressure side of depressor connects, the arc light sensor input interface of the arc light protective device also with it is multiple
Arc photosensor connection.
Further, the tripping output port of the current protection unit respectively with the high-voltage end and low pressure of the second transformer
The breaker at end connects, and the current detecting end of the arc light protective device passes through current line and the low-pressure side of the second transformer
The connection of second current sensor.
Further, first low-voltage bus bar is connect by busbar breaker with the second low-voltage bus bar, the arclight
Protective device is also connect with protection for feed line unit and monitoring of working condition unit.
Further, as shown in Fig. 2, the arc light protective device includes casing 1 and internal circuit board, the casing 1
Main panel be equipped with liquid crystal display 2, a variety of LED lights 3, function button 4 and guide key 5, behind the casing 1
Plate is equipped with alternating current input interface, arc light sensor input interface, tripping output port, clock sync cap, communication interface, prison
Control interface, expansion interface and environmental data input interface;
Further, the LED light 3 includes power supply indicator, run indicator, synchro light, device exception
Indicator light, environmental monitoring indicator light, the out-of-limit indicator light of electric current, the out-of-limit indicator light of arc light, tripping indicator light and maintenance indicator light.
Wherein, green light can be used in power supply indicator, run indicator and synchro light, power supply indicator when having electricity
Bright, run indicator is flashed when having program operation with 2Hz, and synchro light is bright after time synchronization.
Red light can be used in device exception indicator light, the out-of-limit indicator light of electric current, the out-of-limit indicator light of arc light and tripping indicator light, when
Device exception indicator light is bright when device exception, and the out-of-limit indicator light of electric current of more prescribing a time limit when electric current is long is bright, more prescribes a time limit when arc light is long
The out-of-limit indicator light of arc light is bright, and tripping indicator light is bright after device tripping.
Amber light can be used in environmental monitoring indicator light and maintenance indicator light, the environmental monitoring indicator light when environmental monitoring alarm
Bright, when device is set as maintenance, maintenance indicator light is bright.
Further, the function button 4 includes returning to key F1, upper function pages key F2, next function pages
Key F3, main interface key F4 and reset key are returned to.
Further, the guide key 5 includes key on direction, square down button, direction left button, the right key in direction
With confirmation OK key.
The function button 4 and/or guide key 5 are touch key-press, and the liquid crystal display 2 is touch display screen.Into
One step, the touch key-press and touch display screen together as one.
Further, the monitoring of working condition unit includes Temperature Humidity Sensor, radio temperature sensor, fuel gas sensing
Device, wireless humidity sensor, leakage current test unit and leakage current sensor.
The two sides of the front panel are additionally provided with mounting plate 6, and multiple installation fixation holes are offered on the mounting plate 6.
Arc light protective device in the present invention has acquisition, tripping and the signal output of electric current and arc photosensor signal
Ability provides a variety of indicator lights, and the state of arc light protecting device is more intuitively understood convenient for operator.The present invention also provides
Touch display screen and touch key-press support large-size screen monitors to show, and reduce the volume of device, reduce the occupied space of device.The present invention
Also there is external interface abundant, support more functions, the monitoring of visible light and infrared light can be completed at the same time.
Arc light protection system proposed by the invention carries out arc protection to double-bus, in order to reduce fault zone, the
One low-voltage bus bar and the second low-voltage bus bar are limited by busbar breaker.Arc light protective device and current protection unit conduct
Trip unit.Arc light protective device jumps the breaker of the first transformer in the first low-voltage bus bar failure, as the first low pressure mother
When line and the second low-voltage bus bar failure, make breaking failure protection.If it exceeds current ration, when area breaks down, arclight
The busbar breaker of protective device tripping the first low-voltage bus bar and the second low-voltage bus bar.Current protection unit jumps the second transformer
Breaker, while the breaking failure protection as the second low-voltage bus bar.
Arc light alarm is obtained from the alarm relay of arc light protective device, the activation when region is broken down, and system is certainly
Inspection alarm is obtained from arc light protective device alarm relay.
Electric arc protection principle: according to two factors of arc light and current increment, when being detected simultaneously by arc light and current increment
When issue trip signal.When system jam, arc optical signal is converted electric signal by arc photosensor, is assisted by I/O
Unit is transmitted to arc light protective device, and arc light protective device passes through sensed current signal again and reaches initiation value, that is, issues
Trip signal.
The present invention is designed using distributed mode, is suitable as the protection of mesolow double-bus, has flexible attributes of network.
Wherein protection for feed line unit, which can be individually formed, minimizes protection system, and separately protected feeder line is to reduce forced outage range.Feeder line
Unit also can run on centralized monitoring mode, pass through arc light protective device dispatching communication.Electric arc protection of the present invention is using inspection
It surveys arc light and electric current is input quantity, can individually be protected as overcurrent protection, pure arc protection and arc light and the double criterions of overcurrent.This
System have the advantages that principle is simple, reliable in action rapidly, to primary equipment without particular/special requirement, be adapted to the various methods of operation.
Describe a kind of arc light protection system according to the present invention in an illustrative manner above with reference to attached drawing.But this
Field can also not depart from this hair it will be appreciated by the skilled person that for the arc light protection system that aforementioned present invention is proposed
Various improvement are made on the basis of bright content.Therefore, protection scope of the present invention should be by the content of appended claims
It determines.