CN110376487A - A kind of line tripping fault detection method and system - Google Patents
A kind of line tripping fault detection method and system Download PDFInfo
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- CN110376487A CN110376487A CN201910716288.5A CN201910716288A CN110376487A CN 110376487 A CN110376487 A CN 110376487A CN 201910716288 A CN201910716288 A CN 201910716288A CN 110376487 A CN110376487 A CN 110376487A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
This application discloses a kind of line tripping fault detection method and systems, obtain the residual current and operating current of route in real time respectively；If there is tripping fault in route, it is determined that the tripping fault type, the tripping fault include: branch tripping and the total lock tripping of batch meter；Line tripping fault route and reason are determined from circuit branch road and batch meter bus according to the tripping type.Due to realizing the real-time acquisition to the residual current and operating current of route, if failure is branch tripping, the trip reason of fault branch and branch can be determined according to the operating circuit and residual current of branch.If it is the total lock tripping of batch meter, be then out of order batch meter bus and trip reason can be determined according to the operating current and residual circuit stream of branch and batch meter bus, and then realize while handling processing residual current and the excessive caused trip problem of operating current.
Description
Technical field
This application involves power failure detection technique fields, and in particular to a kind of line tripping fault detection method and is
System.
Background technique
Power circuit is easy to produce power circuit tripping when user is excessive in daily life.General power circuit tripping
It is a kind of self-shield measure to power circuit.Line tripping can bring big inconvenience to residential electricity consumption, therefore when route is jumped
Artificial power transmission again is carried out after lock under normal circumstances.
If there is multiple tripping, then need to detect tripping fault.Tripping fault positioning in the prior art produces
Product can only acquire single channel, stable residual current, judge corresponding failure after tripping fault occurs, and cannot handle, sentence
Disconnected residual current causes the corresponding route that trips, and can not handle processing residual current simultaneously and the excessive caused tripping of electric current is asked
Topic.
Summary of the invention
In order to solve the above-mentioned technical problem the application, proposes following technical solution:
In a first aspect, the embodiment of the present application provides a kind of line tripping fault detection method, which comprises respectively
The residual current and operating current of route are obtained in real time；If there is tripping fault in route, it is determined that the tripping fault type,
The tripping fault includes: branch tripping and the total lock tripping of batch meter；According to the tripping type from circuit branch road and batch meter
Line tripping fault route and reason are determined in bus.
Using above-mentioned implementation, due to realizing the real-time acquisition to the residual current and operating current of route, if
Failure is branch tripping, then can determine that the tripping of fault branch and branch is former according to the operating circuit and residual current of branch
Cause.If it is the total lock tripping of batch meter, then can be determined according to the operating current and residual current of branch and batch meter bus
Failure batch meter bus and trip reason, and then realize while handling processing residual current and the excessive caused jump of operating current
Lock problem.
With reference to first aspect, in a first possible implementation of that first aspect, the difference obtains route in real time
Residual current and operating current, comprising: measurement accuracy is used to obtain each line for the residual current detection circuit of sub- milliampere rank
The real-time residual current on road；The operating current of each route is obtained using current detecting equipment.
With reference to first aspect, in a second possible implementation of that first aspect, if tripping fault occurs in route,
Determine the tripping fault type, comprising: determine the first branch at the first moment and the operating current and residue of batch meter bus
Electric current；If the operating current and residual current of the first branch described in the first moment tend to 0 after increasing suddenly, branch tripping occurs,
The first branch is any branch；Alternatively, if the loop current of batch meter bus and residual current described in the first moment are steep
Tend to 0 after increasing, then the total lock tripping of batch meter occurs.
With reference to first aspect, in first aspect in the third possible implementation, it is described according to the tripping type from
Line tripping fault route and reason are determined in circuit branch road and batch meter bus, comprising: if the tripping type is branch
Tripping, and operating current of the first branch at the second moment is greater than the first operating current, then the first line trip reason is
Operating current is excessive, and second moment is the current acquisition moment adjacent with before first moment；Alternatively, if described
Operating current of the first branch at the second moment is less than or equal to first operating current, then by the first branch second
The residual current at moment is compared with the first residual current, is remained if the residual current of the first branch is greater than described first
Aftercurrent, then the first line trip reason is that residual current is excessive.
The third possible implementation with reference to first aspect, in the 4th kind of possible implementation of first aspect, institute
It states and determines line tripping fault route and reason from circuit branch road and batch meter bus according to the tripping type, comprising: such as
Tripping described in fruit is the total lock tripping of batch meter, and electric current of the bus at the second moment is less than or equal to the second work electricity in batch meter
Stream, and residual current of the bus at the second moment is less than or equal to the second residual current in the batch meter, then respectively by every
Residual current and the first remaining electricity of the branch in the operating current at the second moment and first operating current, every branch
Stream is compared respectively, is greater than the surplus of first operating current or the second branch if there is second branch operating current
Aftercurrent is greater than first residual current, then is that second branch operating current is excessive or remaining by the total lock trip reason of batch meter
Electric current is excessive, and the second branch is any branch；Alternatively, if electric current of the bus at the second moment is greater than in the batch meter
Residual current of the bus at the second moment is greater than second residual current in second operating current or the batch meter, and
The operating current of every branch is respectively less than first operating current at the second moment, and the residual current of every branch is at second
It carves and is respectively less than first residual current, then the total lock trip reason of batch meter is that bus current is excessive or bus residual current mistake
Greatly.
Second aspect, the embodiment of the present application provide a kind of line tripping fault detection system, the system comprises: it obtains
Module, for obtaining the residual current and operating current of route in real time respectively；First determining module, if jumped for route
Lock failure, it is determined that the tripping fault type, the tripping fault include: branch tripping and the total lock tripping of batch meter；Second
Determining module, for determining line tripping fault route and original from circuit branch road and batch meter bus according to the tripping type
Cause.
In conjunction with second aspect, in second aspect in the first possible implementation, the acquisition module, comprising: first
Acquiring unit, for using measurement accuracy to obtain for the residual current detection circuit of sub- milliampere rank the real-time residue of each route
Electric current；Second acquisition unit, for obtaining the operating current of each route using current detecting equipment.
In conjunction with second aspect, in second of second aspect possible implementation, first determining module, comprising:
First determination unit, for determining the first branch at the first moment and the operating current and residual current of batch meter bus；Second
Determination unit is propped up if the operating current and residual current for the first branch described in the first moment tend to 0 after increasing suddenly
Road tripping, the first branch are any branch；Alternatively, if the loop current and residue of batch meter bus described in the first moment
Electric current tends to 0 after increasing suddenly, then the total lock tripping of batch meter occurs.
In conjunction with second aspect, in second aspect in the third possible implementation, second determining module includes:
Third determination unit, if being branch tripping for the tripping type, and the first branch is in the work at the second moment
Make electric current greater than the first operating current, then the first line trip reason is that operating current is excessive, second moment be with
The adjacent current acquisition moment before first moment；4th determination unit, if for the first branch at second
The operating current at quarter be less than or equal to first operating current, then by the first branch the second moment residual current with
First residual current is compared, if the residual current of the first branch is greater than first residual current, described the
One line tripping reason is that residual current is excessive.
The third possible implementation in conjunction with second aspect, in the 4th kind of possible implementation of second aspect, institute
Stating the second determining module includes: the 5th determination unit, if being the total lock tripping of batch meter for the tripping, and female in batch meter
Electric current of the line at the second moment is less than or equal to the second operating current, and residue electricity of the bus at the second moment in the batch meter
Stream is less than or equal to the second residual current, then respectively that every branch is electric in the operating current at the second moment and first work
Stream, every branch residual current be compared respectively with first residual current, if there is second branch operating current
Be greater than first residual current greater than first operating current or the residual current of the second branch, then it is batch meter is total
Lock trip reason is that second branch operating current is excessive or residual current is excessive, and the second branch is any branch；6th really
Order member, if the electric current for bus in the batch meter at the second moment is greater than second operating current or the metering
Residual current of the bus at the second moment is greater than second residual current in case, and the operating current of every branch is at second
It carves and is respectively less than first operating current, the residual current of every branch is respectively less than first residual current at the second moment,
Then the total lock trip reason of batch meter is that bus current is excessive or bus residual current is excessive.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of line tripping fault detection method provided by the embodiments of the present application；
Fig. 2 is a kind of acquisition device schematic diagram provided by the embodiments of the present application；
Fig. 3 is a kind of structural schematic diagram of line tripping fault detection system provided by the embodiments of the present application.
Specific embodiment
This programme is illustrated with specific embodiment with reference to the accompanying drawing.
Fig. 1 is a kind of flow diagram of line tripping fault detection method provided by the embodiments of the present application, referring to Fig. 1,
Line tripping fault detection method in the present embodiment includes:
S101 obtains the residual current and operating current of route in real time respectively.
As shown in Fig. 2, use a processor respectively with measurement accuracy for the residual current detection circuit of sub- milliampere rank and
Current detecting equipment electrical connection.And then measurement accuracy is used to obtain each route for the residual current detection circuit of sub- milliampere rank
Real-time residual current, the operating current of each route is obtained using current detecting equipment.
Residual current detection circuit and current detecting equipment can be in real time to residual currents and operating current in the present embodiment
It is detected, processor obtains detected value in real time.
S102, if tripping fault occurs in route, it is determined that the tripping fault type, the tripping fault include: branch
Road tripping and the total lock tripping of batch meter.
Since tripping fault is there may be two kinds of situations, first be exactly branch tripping cause trip branch operating current and
Residual current tends to 0 after increasing suddenly, second is the total lock tripping of batch meter, can cause the circuit electricity of batch meter bus in this case
Stream and residual current tend to 0 after increasing suddenly.
Therefore in the present embodiment, the first branch at the first moment and operating current and the residue electricity of batch meter bus are determined
Stream.If the operating current and residual current of the first branch described in the first moment tend to 0 after increasing suddenly, branch tripping, institute occurs
Stating the first branch is any branch；Alternatively, if the loop current of batch meter bus and residual current described in the first moment increase suddenly
After tend to 0, then batch meter total lock tripping occurs.The first moment was the first branch or batch meter bus bar circuit in the present embodiment
At the time of electric current and residual current tend to 0 after increasing suddenly.
S103 determines line tripping fault route and original according to the tripping type from circuit branch road and batch meter bus
Cause.
Fault location has six kinds of situations in the present embodiment, and three kinds of residual current (electric leakage) failures: the first is a certain branch
Residual current crosses major break down, and branch is caused to trip, and second is that a certain branch residual current crosses major break down, causes branch or metering
The total lock tripping of case, the third is that branch is all normal, and batch meter residual current is excessive, causes the total lock tripping of batch meter.
Three kinds of over current faults, the first is that a certain branch operating current crosses major break down, causes branch to trip, second is certain
One branch operating current crosses major break down, causes branch or the total lock tripping of batch meter, the third is that branch is all normal, batch meter work
It is excessive to make electric current, causes the total lock tripping of batch meter.
Therefore, for above-mentioned six kinds of situations, in conjunction with the tripping fault type determined in S102 to faulty line and failure
Reason is determined.
Specifically, if the tripping type is branch tripping, and operating current of the first branch at the second moment is greater than
First operating current, then the first line trip reason is that operating current is excessive, when second moment is with described first
The adjacent current acquisition moment before quarter.It is considered that the first moment be tripping at the time of, then the second moment be tripping before close to
At the moment, the time difference between the second moment and the first moment is smaller under normal circumstances, for example, only several milliseconds or a few microseconds when
Between it is poor.It can be considered that whether branch tripping or the total lock tripping of batch meter, corresponding in the second moment corresponding work electricity
Stream and residual current be the corresponding current value of the preceding peak value increased suddenly that trips.
If operating current of the first branch at the second moment is less than or equal to first operating current, by institute
The residual current that the first branch is stated at the second moment is compared with the first residual current, if the residue electricity of the first branch
Stream is greater than first residual current, then the first line trip reason is that residual current is excessive.
Wherein, the first operating current is in electric power safety standard to the maximum current of branch current in the present embodiment, first
Residual current is the corresponding maximum residual electric current of branch electric leakage safety in electric power safety standard.
It trips if not branch is belonged to, but the total lock tripping of batch meter, corresponding faulty line has multiple situation at this time.
Bus current and bus residual current in batch meter are first determined whether at this time.If the tripping is the total lock tripping of batch meter, and is counted
In measuring tank bus the second moment electric current be less than or equal to the second operating current, and in the batch meter bus at the second moment
Residual current be less than or equal to the second residual current, then respectively by every branch in the operating current at the second moment and described the
One operating current, every branch residual current be compared respectively with first residual current, if there is second branch
Operating current is greater than first operating current or the residual current of the second branch is greater than first residual current, then will
The total lock trip reason of batch meter is that second branch operating current is excessive or residual current is excessive, and the second branch is any
Road.
It should be pointed out that if sentencing when the operating current of second branch is compared with first operating current
The operating current of the disconnected second branch out is greater than first operating current, then the second branch is determined as failure
Route can further judge whether the residual current of second branch is above standard at this time.Because causing for branch
Batch meter total lock tripping, it may be possible to because the operating current of branch is excessive or the residual current of branch is excessive.If only judged
The operating current of out branch is excessive, no longer further determines that whether the residual current of branch complies with standard.One special situation,
The total lock tripping of batch meter is caused to be not as the branch operating current excessive, but because residual current is excessive, then handle tripping
Failure or when only consider operating current problem, the problem of possible later period can also cause the total lock tripping of batch meter because of the branch.
If electric current of the bus at the second moment is greater than second operating current or the batch meter in the batch meter
Residual current of the interior bus at the second moment is greater than second residual current, and the operating current of every branch is at the second moment
The residual current of respectively less than described first operating current, every branch is respectively less than first residual current at the second moment, then
The total lock trip reason of batch meter is that bus current is excessive or bus residual current is excessive.
Wherein, the second operating current is that the maximum of bus current in batch meter in electric power safety standard is electric in the present embodiment
Stream, the second residual current are the corresponding maximum residual electric current of bus electric leakage safety in batch meter in electric power safety standard.
As can be seen from the above embodiments, a kind of line tripping fault detection method is present embodiments provided, the method includes
Obtain the residual current and operating current of route in real time respectively；If there is tripping fault in route, it is determined that the tripping fault
Type, the tripping fault include: branch tripping and the total lock tripping of batch meter；According to the tripping type from circuit branch road and meter
Line tripping fault route is determined in measuring tank bus.Due to realizing to the residual current of route and obtaining in real time for operating current
It takes, if failure is branch tripping, faulty circuit can be determined according to the operating circuit and residual current of branch.If it is
The total lock tripping of batch meter, then can determine faulty line according to the operating current and residual circuit of branch and batch meter bus,
And then realize while handling processing residual current and the excessive caused trip problem of electric current.
Corresponding with a kind of method provided by the above embodiment, present invention also provides a kind of line tripping fault detection systems
The embodiment of system.Referring to Fig. 3, line tripping fault detection system 20 includes obtaining module 201, the first determining module 202 and the
Two determining modules 203.
The acquisition module 201, for obtaining the residual current and operating current of route in real time respectively.
Specifically, the acquisition module 201, comprising: first acquisition unit and second acquisition unit.Described first obtains list
Member, for using measurement accuracy to obtain for the residual current detection circuit of sub- milliampere rank the real-time residual current of each route.
The second acquisition unit, for obtaining the operating current of each route using current detecting equipment.
First determining module 201, if for there is tripping fault for route, it is determined that the tripping fault type,
The tripping fault includes: branch tripping and the total lock tripping of batch meter.
Specifically, first determining module 201, comprising: the first determination unit and the second determination unit.Described first really
Order member, for determining the first branch at the first moment and the operating current and residual current of batch meter bus.Second determines list
If the operating current and residual current for the first branch described in the first moment tend to 0 after increasing suddenly branch jump occurs for member
Lock, the first branch are any branch；Alternatively, if the loop current and residual current of batch meter bus described in the first moment
Tend to 0 after steep increasing, then the total lock tripping of batch meter occurs.
Second determining module 203, for determining route from circuit branch road and batch meter bus according to the tripping type
Tripping fault route and reason.
Specifically, second determining module 203 includes third determination unit, the 4th determination unit, the 5th determination unit
With the 6th determination unit.
The third determination unit, if being branch tripping for the tripping type, and the first branch is at the second moment
Operating current be greater than the first operating current, then the first line trip reason be operating current it is excessive, second moment
For the current acquisition moment adjacent with before first moment.
4th determination unit, if the operating current for the first branch at the second moment is less than or equal to institute
The first operating current is stated, then the residual current by the first branch at the second moment is compared with the first residual current, such as
The residual current of the first branch described in fruit is greater than first residual current, then the first line trip reason is residual current
It is excessive.
5th determination unit, if be batch meter total lock tripping for the tripping, and in batch meter bus the
The electric current at two moment is less than or equal to the second operating current, and residual current of the bus at the second moment is less than in the batch meter
Or be equal to the second residual current, then respectively by every branch in the operating current at the second moment and first operating current, every
The residual current of branch is compared respectively with first residual current, is greater than institute if there is second branch operating current
The residual current for stating the first operating current or the second branch is greater than first residual current, then the total lock of batch meter trips
Reason is that second branch operating current is excessive or residual current is excessive, and the second branch is any branch.
6th determination unit, if the electric current for bus in the batch meter at the second moment is greater than described second
Residual current of the bus at the second moment is greater than second residual current, and every branch in operating current or the batch meter
Operating current be respectively less than first operating current at the second moment, the residual current of every branch is respectively less than at the second moment
First residual current, then the total lock trip reason of batch meter is that bus current is excessive or bus residual current is excessive.
The same or similar parts between the embodiments can be referred to each other in present specification.Especially for system
For embodiment, since method therein is substantially similar to the embodiment of method, so being described relatively simple, related place ginseng
See the explanation in embodiment of the method.
It should be noted that, in this document, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
Certainly, above description is also not limited to the example above, technical characteristic of the application without description can by or
It is realized using the prior art, details are not described herein；The technical solution that above embodiments and attached drawing are merely to illustrate the application is not
It is the limitation to the application, Tathagata substitutes, and the application is described in detail only in conjunction with and referring to preferred embodiment, ability
Domain it is to be appreciated by one skilled in the art that those skilled in the art were made in the essential scope of the application
Variations, modifications, additions or substitutions also should belong to claims hereof protection scope without departure from the objective of the application.
Claims (10)
1. a kind of line tripping fault detection method, which is characterized in that the described method includes:
Obtain the residual current and operating current of route in real time respectively；
If there is tripping fault in route, it is determined that the tripping fault type, the tripping fault include: branch tripping and meter
The total lock tripping of measuring tank；
Line tripping fault route and reason are determined from circuit branch road and batch meter bus according to the tripping type.
2. line tripping fault detection method according to claim 1, which is characterized in that the difference obtains route in real time
Residual current and operating current, comprising:
Measurement accuracy is used to obtain the real-time residual current of each route for the residual current detection circuit of sub- milliampere rank；
The operating current of each route is obtained using current detecting equipment.
3. line tripping fault detection method according to claim 1, which is characterized in that if tripping event occurs in route
Barrier, it is determined that the tripping fault type, comprising:
Determine the first branch at the first moment and the operating current and residual current of batch meter bus；
If the operating current and residual current of the first branch described in the first moment tend to 0 after increasing suddenly, branch tripping, institute occurs
Stating the first branch is any branch；Alternatively, if the loop current of batch meter bus and residual current described in the first moment increase suddenly
After tend to 0, then batch meter total lock tripping occurs.
4. line tripping fault detection method according to claim 1, which is characterized in that described according to the tripping type
Line tripping fault route and reason are determined from circuit branch road and batch meter bus, comprising:
If the tripping type is branch tripping, and operating current of the first branch at the second moment is greater than the first work electricity
Stream, then the first line trip reason is that operating current is excessive, and second moment is adjacent with before first moment
The current acquisition moment；
Alternatively, if operating current of the first branch at the second moment is less than or equal to first operating current, it will
Residual current of the first branch at the second moment is compared with the first residual current, if the residue of the first branch
Electric current is greater than first residual current, then the first line trip reason is that residual current is excessive.
5. line tripping fault detection method according to claim 4, which is characterized in that described according to the tripping type
Line tripping fault route and reason are determined from circuit branch road and batch meter bus, comprising:
If the tripping is the total lock tripping of batch meter, and electric current of the bus at the second moment is less than or equal to second in batch meter
Operating current, and residual current of the bus at the second moment is less than or equal to the second residual current in the batch meter, then distinguishes
By every branch the operating current at the second moment and first operating current, every branch residual current and described first
Residual current is compared respectively, is greater than first operating current or second described if there is second branch operating current
The residual current on road is greater than first residual current, then is that second branch operating current is excessive by the total lock trip reason of batch meter
Or residual current is excessive, the second branch is any branch；
Alternatively,
If electric current of the bus at the second moment is greater than female in second operating current or the batch meter in the batch meter
Residual current of the line at the second moment is greater than second residual current, and the operating current of every branch is small at the second moment
It is respectively less than first residual current at the second moment in the residual current of first operating current, every branch, then is measured
The total lock trip reason of case is that bus current is excessive or bus residual current is excessive.
6. a kind of line tripping fault detection system, which is characterized in that the system comprises:
Module is obtained, for obtaining the residual current and operating current of route in real time respectively；
First determining module, if there is tripping fault for route, it is determined that the tripping fault type, the tripping fault
It include: branch tripping and the total lock tripping of batch meter；
Second determining module, for determining line tripping fault from circuit branch road and batch meter bus according to the tripping type
Route and reason.
7. line tripping fault detection system according to claim 6, which is characterized in that the acquisition module, comprising:
First acquisition unit, for using measurement accuracy to obtain each route for the residual current detection circuit of sub- milliampere rank
Real-time residual current；
Second acquisition unit, for obtaining the operating current of each route using current detecting equipment.
8. line tripping fault detection system according to claim 6, which is characterized in that first determining module, packet
It includes:
First determination unit, for determining the first branch at the first moment and the operating current and residual current of batch meter bus；
Second determination unit, if the operating current and residual current for the first branch described in the first moment tend to 0 after increasing suddenly,
Branch tripping then occurs, the first branch is any branch；Alternatively, if the circuit electricity of batch meter bus described in the first moment
Stream and residual current tend to 0 after increasing suddenly, then the total lock tripping of batch meter occurs.
9. line tripping fault detection system according to claim 6, which is characterized in that the second determining module packet
It includes:
Third determination unit, if being branch tripping for the tripping type, and the first branch is in the work electricity at the second moment
Stream be greater than the first operating current, then the first line trip reason be operating current it is excessive, second moment be with it is described
The adjacent current acquisition moment before first moment；
4th determination unit, if the operating current for the first branch at the second moment is less than or equal to first work
Make electric current, then the residual current by the first branch at the second moment is compared with the first residual current, if described
The residual current of one branch is greater than first residual current, then the first line trip reason is that residual current is excessive.
10. line tripping fault detection system according to claim 9, which is characterized in that the second determining module packet
It includes:
5th determination unit, if be batch meter total lock tripping for the tripping, and in batch meter bus at the second moment
Electric current is less than or equal to the second operating current, and residual current of the bus at the second moment is less than or equal to the in the batch meter
Two residual currents, then respectively by every branch in the operating current at the second moment and first operating current, every branch
Residual current is compared respectively with first residual current, is greater than first work if there is second branch operating current
The residual current for making electric current or the second branch is greater than first residual current, then is the by the total lock trip reason of batch meter
Two branch operating currents are excessive or residual current is excessive, and the second branch is any branch；
6th determination unit, if the electric current for bus in the batch meter at the second moment is greater than second operating current
Or residual current of the bus at the second moment is greater than second residual current, and the work electricity of every branch in the batch meter
Stream is respectively less than first operating current at the second moment, and the residual current of every branch is respectively less than described first at the second moment
Residual current, then the total lock trip reason of batch meter is that bus current is excessive or bus residual current is excessive.
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