The content of the invention
It is an object of the invention to provide a kind of suitable in the incoming power that works all the way, three tunnels and following bus connection switchSingle channel power supply or single channel bus connection switch are used as the power plant under this section of power supply power supply mode and transformer station under primary connection modeFactory（Stand）With 3kV～10kV bus protections and failure protection method.
To achieve these goals, present invention employs technical scheme below：
A kind of 3kV～10kV bus protections and failure protection method, apply to the incoming power that works all the way, three tunnels andSingle channel power supply or single channel bus connection switch are used as under this section of bus power supply power supply mode under the primary connection mode of following bus connection switchPower plant and transformer station 3kV～10kV bus protections and failure protection method；The method is mainly by detecting protectionFundamental quantity when bus breaks down, makes phase constituting enclosed type excessively stream bus protection and failure protection action basic logicThe protection act answered, is quickly protected to bus；
Described protection fundamental quantity includes opening into analog quantity, opening into switching value and the amount of outputing, wherein：Open includes into analog quantityThreephase current transformer secondary current, the respective threephase current transformer of three road bus connection switches of the incoming power that works all the way switchSecondary current, bus threephase potential transformer secondary voltage；Open includes the instantaneous locking excessively stream contact of each outlet, mother into switching valueLine defencive function pressing plate input, bus failure protection function pressing plate input；The amount of outputing includes jumping the incoming power switch that works all the wayTripping relay contact, jump three road bus connection switches respective tripping relay contact, bus protection action signal contact, failureProtection signal contact, protection device alarm contact, protection device block signal contact；
Described bus protection and failure protection action basic logic be：This section of bus is respectively in work incoming power, motherConnection 1,2,3 switchs power supplies when powering, and power supply excessively stream action during bus troubles inside the sample space and outlet are without excessively stream locking, busProtect short deferred action tripping power supply；Power supply excessively stream action during bus external area error and outlet excessively stream locking, busProtection is failure to actuate, if now outlet switch, relay fail when, bus failure action long delay tripping power supply.
Used as further illustrating for the present invention, when the incoming power that works is used as power supply, bus protection and failure are protectedShield action basic logic is：
In bus generating region during busbar short-circuit failure, work service entrance switch phase current high-set setting element and composite voltage elementAction, and the low definite value element of three road bus connection switch phase currents, outlet 1 to N switch protections output instantaneous overcurrent contact are failure to actuate,Meet bus protection action logic, short time delay jump work incoming power switch, locking backup auto-activating device sends bus protection actionSignal, light tripping operation lamp and alarm lamp；
Mother 1 is switched or mother 2 is switched or when mother 3 switchs or go out specific electric load short trouble, work outside bus generating regionThe high and low definite value element movement of service entrance switch phase current, and mother 1 is switched or mother 2 is switched or mother 3 is switched or outlet phase currentLow definite value element movement, is unsatisfactory for bus protection action logic, in short-term locking bus protection, and bus protection is failure to actuate；If nowBecause mother 1 is switched or mother 2 is switched or mother 3 switchs or go out specific electric load or relay fail, outlet cannot be cut off for a long time thereforeBarrier, mother 1 is switched or mother 2 is switched or mother 3 switchs or go out the low definite value element movement of specific electric load phase current in setting timeDo not return, then meet failure protection action logic, failure protection action, long delay jump work incoming power switch, locking is standby certainlyDevice is thrown, bus protection action signal is sent, is lighted tripping operation lamp and alarm lamp.
As further illustrating for the present invention, when mother 1 switchs power supply as power supply, bus protection and mistakeClever protection act basic logic is：
In bus generating region during busbar short-circuit failure, the switch phase current high-set setting element of mother 1 and composite voltage element are dynamicMake, and work inlet wire, mother 2, mother 3 switch the low definite value element of phase current, outlet 1 and connect to N switch protections output instantaneous overcurrentPoint is failure to actuate, and meets bus protection action logic, and short time delay is jumped mother 1 and switched, and locking backup auto-activating device sends bus protectionAction signal, light tripping operation lamp and alarm lamp；
Work service entrance switch outside bus generating region or mother 2 is switched or when mother 3 switchs or go out specific electric load short trouble, it is femaleConnection 1 switchs the high and low definite value element movement of phase current, and work service entrance switch or mother 2 are switched or mother 3 is switched or outlet is mutually electricLow definite value element movement is flowed, bus protection action logic is unsatisfactory for, in short-term locking bus protection, bus protection is failure to actuate；If thisWhen due to the service entrance switch or mother 2 is switched or mother 3 switchs or go out specific electric load or relay fail of working, cannot cut off out for a long timeLine failure, work service entrance switch or mother 2 are switched or mother 3 switchs or go out the low definite value element movement of specific electric load phase current in settingDo not return in time, then meet failure protection action logic, failure protection action, long delay is jumped mother 1 and switched, locking prepared auto restartDevice, sends bus protection action signal, lights tripping operation lamp and alarm lamp.
As further illustrating for the present invention, when mother 2 switchs power supply as power supply, bus protection and mistakeClever protection act basic logic is：
In bus generating region during busbar short-circuit failure, the switch phase current high-set setting element of mother 2 and composite voltage element are dynamicMake, and work inlet wire, mother 1, mother 3 switch the low definite value element of phase current, outlet 1 and connect to N switch protections output instantaneous overcurrentPoint is failure to actuate, and meets bus protection action logic, and short time delay is jumped mother 1 and switched, and locking backup auto-activating device sends bus protectionAction signal, light tripping operation lamp and alarm lamp；
Work service entrance switch outside bus generating region or mother 1 is switched or when mother 3 switchs or go out specific electric load short trouble, it is femaleConnection 2 switchs the high and low definite value element movement of phase current, and work service entrance switch or mother 1 are switched or mother 3 is switched or outlet is mutually electricLow definite value element movement is flowed, bus protection action logic is unsatisfactory for, in short-term locking bus protection, bus protection is failure to actuate；If thisWhen due to the service entrance switch or mother 1 is switched or mother 3 switchs or go out specific electric load or relay fail of working, cannot cut off out for a long timeLine failure, work service entrance switch or mother 1 are switched or mother 3 switchs or go out the low definite value element movement of specific electric load phase current in settingDo not return in time, then meet failure protection action logic, failure protection action, long delay is jumped mother 2 and switched, locking prepared auto restartDevice, sends bus protection action signal, lights tripping operation lamp and alarm lamp.
As further illustrating for the present invention, when mother 3 switchs power supply as power supply, bus protection and mistakeClever protection act basic logic is：
In bus generating region during busbar short-circuit failure, the switch phase current high-set setting element of mother 3 and composite voltage element are dynamicMake, and work inlet wire, mother 1, mother 2 switch the low definite value element of phase current, outlet 1 and connect to N switch protections output instantaneous overcurrentPoint is failure to actuate, and meets bus protection action logic, and short time delay is jumped mother 3 and switched, and locking backup auto-activating device sends bus protectionAction signal, light tripping operation lamp and alarm lamp；
Work service entrance switch outside bus generating region or mother 1 is switched or when mother 2 switchs or go out specific electric load short trouble, it is femaleConnection 3 switchs the high and low definite value element movement of phase current, and work service entrance switch or mother 1 are switched or mother 2 is switched or outlet is mutually electricLow definite value element movement is flowed, bus protection action logic is unsatisfactory for, in short-term locking bus protection, bus protection is failure to actuate；If thisWhen due to the service entrance switch or mother 1 is switched or mother 2 switchs or go out specific electric load or relay fail of working, cannot cut off out for a long timeLine failure, work service entrance switch or mother 1 are switched or mother 2 switchs or go out the low definite value element movement of specific electric load phase current in settingDo not return in time, then meet failure protection action logic, failure protection action, long delay is jumped mother 3 and switched, locking prepared auto restartDevice, sends bus protection action signal, lights tripping operation lamp and alarm lamp.
Advantages of the present invention：
Present invention achieves under the primary connection mode of the incoming power that works all the way, three tunnels and following bus connection switch single channelWork incoming power or single channel bus connection switch are used as the power plant under this section of power supply power supply mode and the factory of transformer station（Stand）Use 3kV～10kV bus protections and failure protection method.Bus protection energy action message during bus troubles inside the sample space, can be by former excision failureMore than 1 second time tapered to 0.15 second, gave full play to the effect of main protection；Bus protection can be closed reliably during short trouble outside areaLock, if bus failure protection can in time cut off failure during area's external switch tripping, gives full play to the effect of back-up protection.The protection existsCan correct, reliability, quick acting during internal fault external fault.The method has that safe, reliability is high, sensitivity is high, flexibleThe advantages of property is big, very big live practical application promotional value.
Embodiment：
A kind of 3kV～10kV bus protections and failure protection method, apply to the incoming power that works all the way, three tunnels andSingle channel power supply or single channel bus connection switch are used as under this section of bus power supply power supply mode under the primary connection mode of following bus connection switchPower plant and transformer station 3kV～10kV bus protections and failure protection method；Wherein, the method is mainly by detectionProtect fundamental quantity to constitute enclosed type excessively stream bus protection and failure protection action basic logic, when bus breaks down, makeGo out corresponding protection act, bus is quickly protected；
Described protection fundamental quantity includes opening into analog quantity, opening into switching value and the amount of outputing, wherein, it is one to open into analog quantityThreephase current transformer secondary current, the respective threephase current transformer two of three road bus connection switches of road work incoming power switchPrimary current, bus threephase potential transformer secondary voltage；It is the instantaneous locking excessively stream contact of each outlet, bus guarantor to open into switching valueProtective function pressing plate input, bus failure protection function pressing plate input；The amount of outputing is to jump the tripping operation of the incoming power switch that works all the wayRelay tip, the respective tripping relay contact for jumping three road bus connection switches, bus protection action signal contact, failure protection are movedMake signal contact, protection device alarm contact, protection device block signal contact；
Described bus protection and failure protection action basic logic be：This section of bus is respectively in work incoming power, motherConnection 1,2,3 switchs power supplies when powering, and power supply excessively stream action during bus troubles inside the sample space and outlet are without excessively stream locking, busProtect short deferred action tripping power supply；Power supply excessively stream action during bus external area error and outlet excessively stream locking, busProtection is failure to actuate, if now outlet switch, relay fail when, bus failure action long delay tripping power supply.
Bus protection and failure protection action basic logic are specially：
First, when the inlet wire that works is power supply power supply mode, bus protection and failure protection action basic logic（Such as Fig. 2 institutesShow）：
（1）Bus protection input, work inlet wire power supply mode bus protection input, the switch input of mother 3, work inlet wire are suppliedElectrically failure protection puts into, the hard pressing plate input of the hard pressing plate of bus protection, failure protection.
（2）In bus generating region during busbar short-circuit failure, work inlet wire phase current or Sudden Changing Rate start, and work service entrance switchPhase current high-set setting element movement, if while putting into compound voltage lockout element, composite voltage element movement, and three tunnel mothers are openedClose the low definite value element of phase current, outlet 1 to be failure to actuate to N switch protections output instantaneous overcurrent contact, meet bus protection actionLogic, time delay 1T1 jumps work incoming power switch, and locking backup auto-activating device sends bus protection action signal, lights tripping operation lampAnd alarm lamp.
（3）Outside bus generating region during 1 switch short failure of mother, work inlet wire phase current or Sudden Changing Rate start, work intoThe high and low definite value element movement of wiretap phase current, and the low definite value element movement of the switch phase current of mother 1, are unsatisfactory for bus protectionAction logic, locking bus protection in short-term, bus protection is failure to actuate；If now because mother 1 is switched or relay fail, long-timeOutlet failure cannot be cut off, the low definite value element movement of the switch phase current of mother 1 is not returned in setting time, then meet failure guarantorShield action logic, failure protection action, time delay 1T2 jumps work incoming power switch, and locking backup auto-activating device sends failure protectionAction signal, light tripping operation lamp and alarm lamp.
（4）Outside bus generating region during 2 switch short failure of mother, work inlet wire phase current or Sudden Changing Rate start, work intoThe high and low definite value element movement of wiretap phase current, and the low definite value element movement of the switch phase current of mother 2, are unsatisfactory for bus protectionAction logic, locking bus protection in short-term, bus protection is failure to actuate；If now because mother 2 is switched or relay fail, long-timeOutlet failure cannot be cut off, the low definite value element movement of the switch phase current of mother 2 is not returned in setting time, then meet failure guarantorShield action logic, failure protection action, time delay 1T3 jumps work incoming power switch, and locking backup auto-activating device sends failure protectionAction signal, light tripping operation lamp and alarm lamp.
（5）Outside bus generating region during 3 switch short failure of mother, work inlet wire phase current or Sudden Changing Rate start, work intoThe high and low definite value element movement of wiretap phase current, and the low definite value element movement of the switch phase current of mother 3, are unsatisfactory for bus protectionAction logic, locking bus protection in short-term, bus protection is failure to actuate；If now because mother 3 is switched or relay fail, long-timeOutlet failure cannot be cut off, the low definite value element movement of the switch phase current of mother 3 is not returned in setting time, then meet failure guarantorShield action logic, failure protection action, time delay 1T4 jumps work incoming power switch, and locking backup auto-activating device sends failure protectionAction signal, light tripping operation lamp and alarm lamp.
（6）Outside bus generating region during an at least outlet short trouble, work inlet wire phase current or Sudden Changing Rate start, workThe high and low definite value element movement of service entrance switch phase current, and outlet switch protection output instantaneous overcurrent contact at least one action,Bus protection action logic is unsatisfactory for, in short-term locking bus protection, bus protection is failure to actuate；If now due to outlet switch or guarantorShield tripping, cannot cut off for a long time outlet failure, outlet switch protection output instantaneous overcurrent contact action in setting time notReturn, then meet failure protection action logic, failure protection action, time delay 1T5 jumps work incoming power switch, locking prepared auto restartDevice, sends failure protection action signal, lights tripping operation lamp and alarm lamp.
2nd, when power supply power supply mode of the switch of mother 1 for this section of bus, bus protection and failure protection action are patrolled substantiallyVolume（As shown in Figure 3）：
（1）Bus protection input, the switch power supply mode bus protection input of mother 1, the switch input of mother 3, mother 1 are switchedPower supply mode failure protection puts into, the hard pressing plate input of the hard pressing plate of bus protection, failure protection.
（2）In bus generating region during busbar short-circuit failure, the switch phase current of mother 1 or Sudden Changing Rate start, the switch phase of mother 1Electric current high-set setting element movement, if while put into compound voltage lockout element, composite voltage element movement, and work service entrance switchThe low definite value element of phase current, other low definite value elements of 2 road bus connection switch phase current, outlet 1 to N switch protections export instantaneous overcurrentContact is failure to actuate, and meets bus protection action logic, and time delay 2T1 jumps mother 1 and switchs, and locking backup auto-activating device sends busProtection signal, light tripping operation lamp and alarm lamp.
（3）Work outside bus generating region service entrance switch short trouble when, the switch phase current of mother 1 or Sudden Changing Rate start, femaleThe high and low definite value element movement of the switch phase current of connection 1, and the low definite value element movement of service entrance switch phase current that works, are unsatisfactory for busProtection act logic, locking bus protection in short-term, bus protection is failure to actuate；If now due to service entrance switch switch or the protection of workingTripping, cannot cut off for a long time outlet failure, and the low definite value element movement of work service entrance switch phase current is not returned in setting timeReturn, then meet failure protection action logic, failure protection action, time delay 2T2 jumps mother 1 and switchs, and locking backup auto-activating device sendsFailure protection action signal, light tripping operation lamp and alarm lamp.
（4）Outside bus generating region during 2 switch short failure of mother, the switch phase current of mother 1 or Sudden Changing Rate start, mother 1The high and low definite value element movement of switch phase current, and the low definite value element movement of the switch phase current of mother 2, are unsatisfactory for bus protection and moveMake logic, in short-term locking bus protection, bus protection is failure to actuate；If now because mother 2 is switched or relay fail, for a long time withoutMethod cuts off outlet failure, and the low definite value element movement of the switch phase current of mother 2 is not returned in setting time, then meet failure protectionAction logic, failure protection action, time delay 2T3 jump mother 1 switch, locking backup auto-activating device, send failure protection action signal,Light tripping operation lamp and alarm lamp.
（5）Outside bus generating region during 3 switch short failure of mother, the switch phase current of mother 1 or Sudden Changing Rate start, mother 1The high and low definite value element movement of switch phase current, and the low definite value element movement of the switch phase current of mother 3, are unsatisfactory for bus protection and moveMake logic, in short-term locking bus protection, bus protection is failure to actuate；If now because mother 3 is switched or relay fail, for a long time withoutMethod cuts off outlet failure, and the low definite value element movement of the switch phase current of mother 3 is not returned in setting time, then meet failure protectionAction logic, failure protection action, time delay 2T4 jump mother 1 switch, locking backup auto-activating device, send failure protection action signal,Light tripping operation lamp and alarm lamp.
（6）Outside bus generating region during an at least outlet short trouble, the switch phase current of mother 1 or Sudden Changing Rate start, femaleConnection 1 switchs the high and low definite value element movement of phase current, and outlet switch protection output instantaneous overcurrent contact at least one action,Bus protection action logic is unsatisfactory for, in short-term locking bus protection, bus protection is failure to actuate；If now due to outlet switch or guarantorShield tripping, cannot cut off for a long time outlet failure, outlet switch protection output instantaneous overcurrent contact action in setting time notReturn, then meet failure protection action logic, failure protection action, time delay 2T5 jumps mother 1 and switchs, locking backup auto-activating device is sent outGo out failure protection action signal, light tripping operation lamp and alarm lamp.
3rd, when power supply power supply mode of the switch of mother 2 for this section of bus, bus protection and failure protection action are patrolled substantiallyVolume（As shown in Figure 4）：
（1）Bus protection input, the switch power supply mode bus protection input of mother 2, the switch input of mother 3, mother 2 are switchedPower supply mode failure protection puts into, the hard pressing plate input of the hard pressing plate of bus protection, failure protection.
（2）In bus generating region during busbar short-circuit failure, the switch phase current of mother 2 or Sudden Changing Rate start, the switch phase of mother 2Electric current high-set setting element movement, if while put into compound voltage lockout element, composite voltage element movement, and work service entrance switchThe low definite value element of phase current, other low definite value elements of 2 road bus connection switch phase current, outlet 1 to N switch protections export instantaneous overcurrentContact is failure to actuate, and meets bus protection action logic, and time delay 3T1 jumps mother 2 and switchs, and locking backup auto-activating device sends busProtection signal, light tripping operation lamp and alarm lamp.
（3）Outside bus generating region during 1 switch short failure of mother, the switch phase current of mother 2 or Sudden Changing Rate start, mother 2The high and low definite value element movement of switch phase current, and the low definite value element movement of the switch phase current of mother 1, are unsatisfactory for bus protection and moveMake logic, in short-term locking bus protection, bus protection is failure to actuate；If now because mother 1 is switched or relay fail, for a long time withoutMethod cuts off outlet failure, and the low definite value element movement of the switch phase current of mother 1 is not returned in setting time, then meet failure protectionAction logic, failure protection action, time delay 3T2 jump mother 2 switch, locking backup auto-activating device, send failure protection action signal,Light tripping operation lamp and alarm lamp.
（4）Work outside bus generating region service entrance switch short trouble when, the switch phase current of mother 2 or Sudden Changing Rate start, femaleThe high and low definite value element movement of the switch phase current of connection 2, and the low definite value element movement of service entrance switch phase current that works, are unsatisfactory for busProtection act logic, locking bus protection in short-term, bus protection is failure to actuate；If now due to service entrance switch switch or the protection of workingTripping, cannot cut off for a long time outlet failure, and the low definite value element movement of work service entrance switch phase current is not returned in setting timeReturn, then meet failure protection action logic, failure protection action, time delay 3T3 jumps mother 2 and switchs, and locking backup auto-activating device sendsFailure protection action signal, light tripping operation lamp and alarm lamp.
（5）Outside bus generating region during 3 switch short failure of mother, the switch phase current of mother 2 or Sudden Changing Rate start, mother 2The high and low definite value element movement of switch phase current, and the low definite value element movement of the switch phase current of mother 3, are unsatisfactory for bus protection and moveMake logic, in short-term locking bus protection, bus protection is failure to actuate；If now because mother 3 is switched or relay fail, for a long time withoutMethod cuts off outlet failure, and the low definite value element movement of the switch phase current of mother 3 is not returned in setting time, then meet failure protectionAction logic, failure protection action, time delay 3T4 jump mother 2 switch, locking backup auto-activating device, send failure protection action signal,Light tripping operation lamp and alarm lamp.
（6）Outside bus generating region during an at least outlet short trouble, the switch phase current of mother 2 or Sudden Changing Rate start, femaleConnection 2 switchs the high and low definite value element movement of phase currents, and outlet switch protection output instantaneous overcurrent contact at least one action,Bus protection action logic is unsatisfactory for, in short-term locking bus protection, bus protection is failure to actuate；If now due to outlet switch or guarantorShield tripping, cannot cut off for a long time outlet failure, outlet switch protection output instantaneous overcurrent contact action in setting time notReturn, then meet failure protection action logic, failure protection action, time delay 3T5 jumps mother 2 and switchs, locking backup auto-activating device is sent outGo out failure protection action signal, light tripping operation lamp and alarm lamp.
4th, when power supply power supply mode of the switch of mother 3 for this section of bus, bus protection and failure protection action are patrolled substantiallyVolume（As shown in Figure 5）：
（1）Bus protection input, the switch power supply mode bus protection input of mother 3, the switch input of mother 3, mother 3 are switchedPower supply mode failure protection puts into, the hard pressing plate input of the hard pressing plate of bus protection, failure protection.
（2）In bus generating region during busbar short-circuit failure, the switch phase current of mother 3 or Sudden Changing Rate start, the switch phase of mother 3Electric current high-set setting element movement, if while put into compound voltage lockout element, composite voltage element movement, and work service entrance switchThe low definite value element of phase current, other low definite value elements of 2 road bus connection switch phase current, outlet 1 to N switch protections export instantaneous overcurrentContact is failure to actuate, and meets bus protection action logic, and time delay 4T1 jumps mother 3 and switchs, and locking backup auto-activating device sends busProtection signal, light tripping operation lamp and alarm lamp.
（3）Outside bus generating region during 1 switch short failure of mother, the switch phase current of mother 3 or Sudden Changing Rate start, mother 3The high and low definite value element movement of switch phase current, and the low definite value element movement of the switch phase current of mother 1, are unsatisfactory for bus protection and moveMake logic, in short-term locking bus protection, bus protection is failure to actuate；If now because mother 1 is switched or relay fail, for a long time withoutMethod cuts off outlet failure, and the low definite value element movement of the switch phase current of mother 1 is not returned in setting time, then meet failure protectionAction logic, failure protection action, time delay 4T2 jump mother 3 switch, locking backup auto-activating device, send failure protection action signal,Light tripping operation lamp and alarm lamp.
（4）Outside bus generating region during 2 switch short failure of mother, the switch phase current of mother 3 or Sudden Changing Rate start, mother 3The high and low definite value element movement of switch phase current, and the low definite value element movement of the switch phase current of mother 2, are unsatisfactory for bus protection and moveMake logic, in short-term locking bus protection, bus protection is failure to actuate；If now because mother 2 is switched or relay fail, for a long time withoutMethod cuts off outlet failure, and the low definite value element movement of the switch phase current of mother 2 is not returned in setting time, then meet failure protectionAction logic, failure protection action, time delay 4T3 jump mother 3 switch, locking backup auto-activating device, send failure protection action signal,Light tripping operation lamp and alarm lamp.
（5）Work outside bus generating region service entrance switch short trouble when, the switch phase current of mother 3 or Sudden Changing Rate start, femaleThe high and low definite value element movement of the switch phase current of connection 3, and the low definite value element movement of service entrance switch phase current that works, are unsatisfactory for busProtection act logic, locking bus protection in short-term, bus protection is failure to actuate；If now due to service entrance switch switch or the protection of workingTripping, cannot cut off for a long time outlet failure, and the low definite value element movement of work service entrance switch phase current is not returned in setting timeReturn, then meet failure protection action logic, failure protection action, time delay 4T4 jumps mother 3 and switchs, and locking backup auto-activating device sendsFailure protection action signal, light tripping operation lamp and alarm lamp.
（6）Outside bus generating region during an at least outlet short trouble, the switch phase current of mother 3 or Sudden Changing Rate start, femaleConnection 3 switchs the high and low definite value element movement of phase currents, and outlet switch protection output instantaneous overcurrent contact at least one action,Bus protection action logic is unsatisfactory for, in short-term locking bus protection, bus protection is failure to actuate；If now due to outlet switch or guarantorShield tripping, cannot cut off for a long time outlet failure, outlet switch protection output instantaneous overcurrent contact action in setting time notReturn, then meet failure protection action logic, failure protection action, time delay 4T5 jumps mother 3 and switchs, locking backup auto-activating device is sent outGo out failure protection action signal, light tripping operation lamp and alarm lamp.