CN103683173B - Identification and the method and current distribution units of the communication connection of sign failure - Google Patents
Identification and the method and current distribution units of the communication connection of sign failure Download PDFInfo
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- CN103683173B CN103683173B CN201210419476.XA CN201210419476A CN103683173B CN 103683173 B CN103683173 B CN 103683173B CN 201210419476 A CN201210419476 A CN 201210419476A CN 103683173 B CN103683173 B CN 103683173B
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Abstract
The present invention relates to the communication connection (6 for identifying and indicating the failure in switchgear, 7) method, the switchgear is seen with a switch above set (2) and at least two switches (3 directly set behind for distribution electric current (1) from power supply (5), 4), wherein switch (2, 3, 4) communication between passes through communication connection (6, 7) by data signal (M, IL) carry out, and wherein signal (M, IL the upper overlapping transmission of time) and signal (M, overlapping on voltage IL) received before the switch (2 that sets, 3, 4) place connects.To make to ensure defencive function at any time, it is proposed that：As checking signal by a switch set below (3,4) communication connection (6 is passed through respectively, 7) signal (M) is sent, and remaining switch (2) indicates the communication connection (6,7) of failure respectively if the checking signal disappears within the previously given duration.
Description
Technical field
The present invention relates to the failure being used to identify and indicate in switchgear according to the preamble of claim 1 and 9
The method of communication connection and the current distribution units for performing this method.
Background technology
It is known in current distribution units by switch, particularly low-voltage power switch, in individual equipment branch road (or consumption
Electrical equipment) on distribute electric current.These switches are respectively that rated current designs and interrupted in case of a fault the electric current for flowing through switch,
Such as the electric current occurred in short circuit.The break down or equipment branch road closest to failure should only be cut off respectively herein.
This behavior is referred to as selectively cutting off.At least see a detection in the switch above set be present from power supply at each
Device and a trip unit.Detection means gathers the electric current for flowing through switch by converter respectively, and wherein trip unit is verified
Whether previously given current condition is met.If it is, trip unit makes switch trip.
Known such switchgear, wherein being communicated with one another for the switch selectively cut off by communication connection.Then
One wherein for example particularly as having short circuit and meeting that (the setting below) switch of current condition will by corresponding signal
The switch that this notice is above set.The switch above set as a result does not disconnect itself immediately, but (pre- in the defined time
Time delay as defined in elder generation) wait whether the switch set below threads off.If the switch set below is passing through above-mentioned delay
Do not threaded off after time, then the switch interrupts electric current flowing above set.The avenues of communication is set below upwards by supplier of electricity respectively
Switch carry out.This selection mode of people is referred to as the selectivity control ZSS for shortening the time, and it is also referred to as regioselectivity
ZSI (Zone Selective Interlocking, zone selective interlock).
Signal can be used as data signal to build, as known to from US7058482.
If directly setting multiple switch below in a switch, the switch that they are generally set by bus and above
Connection, wherein these switches have corresponding interface respectively.
The signal for being likely to occur transmission situation overlapping in time is determined by failure, wherein these signals are being connect
It is overlapping on voltage on the switch of receipts.This is especially in two switches set below simultaneously or almost simultaneously to directly preceding
The switch that face is set occurs when sending signal.
It is a disadvantage here that by this it is overlapping be likely to occur uncertain state, this may cause influence defencive function.
The content of the invention
The task of the present invention is to avoid uncertain state, all to ensure defencive function at any time.
The task solves on method by the feature of claim 1, and will by right on current distribution units
10 feature is asked to solve；Dependent claims represent favourable design.
Solution on method provides, is sent respectively by communicating to connect by (preferably setting a below) switch
One signal is as checking signal, and when the checking signal does not arrive within the prespecified duration, remaining is opened
Close the communication connection for indicating failure respectively.
To avoid interference from suggesting, signal is built from low state, and has different signal time length for the sake of distinguishing.
One signal element set on switch is used for the communication connection for indicating failure.
Suitably, verify that signal repeats especially to be cyclically repeated within the prespecified duration respectively.
If make the signal length of (less important) checking signal smaller than remaining (more important respectively) signal so that
Remaining (more important) letter can be reliably identified in the case of overlapping in time with (less important) checking signal
Number, then it can improve reliability.
When meeting prespecified current condition, automatically trigger switch disconnects respectively.
If the signal includes a postpones signal, it is sent by communicating to connect respectively by the switch set below,
To notify that the switching current condition that above sets meets and it interrupts the electric current, then methods described can be improved.
To realize that the selectivity control that the time shortens is suggested：There is provided a prespecified time delay, before set
Switch after postpones signal is received respectively by thread off postpone the time delay.
If the signal includes a cancel message, it is terminated to be believed by delay respectively by the reception of the switch above set
The delay of number triggering, then can reduce short-circuit load, wherein should the signal length of (more important) cancel message be more than remaining
The signal length of (less important) signal.
Solution on current distribution units provides that (preferably setting a below) switch passes through communication link respectively
Signal is received and sent as checking signal, and if the checking signal disappears within the previously given duration remaining
Switch respectively indicate failure communication connection.
Brief description of the drawings
The present invention is described in detail below according to one embodiment.In accompanying drawing：
Fig. 1 shows current distribution units above set with one and two switches set below,
Fig. 2 shows the communication connection of the switch according to Fig. 1, the information for transmission form for data signal,
Fig. 3 shows the example of the signal according to Fig. 2,
Fig. 4 shows the repetition in the cycle of the checking signal according to Fig. 3.
Embodiment
Fig. 1 shows the current distribution units 1 with three switches 2,3,4, and these switches are used as low-voltage power switch system
Make, and connected in power supply 5.See that switch 2 is directly set before two switches 3,4 from power supply 5, and two switches 3,4 are direct
Set after switch 2.
The electric current for flowing through the switch 3,4 directly set below also flows through the switch 2 above set.Each switch 2,3,4
Disconnected automatically when generally meeting a previously given current condition respectively, be when more than a current threshold here.
Current threshold is for example exceeded in short circuit.
Switch 2,3,4 is set according to hierarchical level (hierarchically), wherein switch 2 establishes a hierarchical level (grade), is directly existed
The switch 3,4 set below is established in its lower hierarchical level (grade) set.Then the switch directly set below in switch 3,4
(being not present here) establishes hierarchical level being located under it, etc..
Switch 2,3,4 is connected to each other by communication connection 6,7.Connection 6,7 is realized and preceding as bus connection 6a, 7a
Converge at one public EBI 8 of the switch 2 that face is set.
The communication connection 6,7 of switch 2,3,4 is diagrammatically illustrated in fig. 2.It can be seen that each switch 2,3,4 was both
ZSI_IN2, ZSI_IN3, ZSI_IN4 are inputted with communication, also there is communication output ZSI_OUT2, ZSI_OUT3, ZSI_OUT4,
They are belonging respectively to an ETU/ZSI module：ETU/ZSI2, ETU/ZSI3, ETU/ZSI4, wherein, ZSI is Zone
Selective Interlocking(, signal-selectivity) abbreviation, ETU is electronics trip unit
The abbreviation of (Electronic Trip Unit).Public EBI 8 is located at the input ZSI_IN2 of the switch 2 above set
Place.6a, 7a are connected by bus, the switch 3,4 that the switch 2 above set and two are set below exchanges information, that is to say, that
Bus connection 6a, 7a are bi-directionally connected herein, but can also be configured to above set from the direction of switch 3,4 set below
Switch 2 unidirectional connection.
Exemplified herein two of Fig. 3 is used for signal M, IL that information exchanges, and they form a checking signal M
(Monitor, a monitoring) and postpones signal IL (Interlock, interlocking).
Signal M, IL have digital form, and are made up of respectively two states, otherwise their voltage level is herein
Positioned at 0 volt (low state), otherwise it is located at+5 volts (high states).Signal M, IL are set (i.e. logic when with low state
1), it is not set (i.e. logical zero) when with high state.
Voltage level must be before each signal M, IL beginning that is, in its start edge in all signal M, IL
The preceding minimum time for keeping 60 prespecified μ s (microsecond) in high regime.
Signal M, IL are shown in Fig. 3, wherein signal M time span is 10 μ s (microsecond), and signal IL is 100 μ s,
That is they are different in time span.
To each 2 or 3,4 prespecified time delay of switch of level, after postpones signal IL is received with
The dropout of the time delay delay switch 2,3,4 or automatic disconnection and current interruptions thus.
The switch 3,4 set below the switch 2 that respectively forwardly face is set sends postpones signal IL, to notify the latter：Electricity
Stream condition meets and by it by interruptive current.Postpones signal IL is used for, before being started by the switch 3 (or 4) set below
The time delay for the switch 2 that face is set, that is to say, that block it within the time.
Time delay is all identical respectively for all switches 2 or 3,4 with one-level, and it increases towards power supply 5.
Because switch 3,4 forms nethermost level, their (preferably) forthwith thread off, that is to say, that they prolong
The slow time is 0ms.The time delay of switch 2 is, for example, 50ms herein.(in the case where being distributed according to Fig. 1 electric current, if
Another unique level is existed under in switch 3,4 and its switch forms nethermost level and therefore do not prolonged correspondingly
Behindhand thread off, then the time delay for switching 2 is, for example, 100ms, and the time delay of switch 3,4 is 50ms.)
If for example, switch 3 after postpones signal IL is sent and through switch 2 50ms time delay after also not
Thread off, then switch 2 and thread off immediately.
Especially and in other words：If switch 3 recognizes short circuit, it connects 6a, 7a by bus and forwardly set
Switch 2 send postpones signal IL, switch 2 equally recognizes the short circuit, but does not thread off, and is to wait for giving its regulation in advance
, by postpones signal IL reception trigger 50ms time delay.After 50ms, opened if short circuit also exists all the time
2 are closed to thread off.
When two signal M and IL occur simultaneously, postpones signal IL always plays a leading role, because its length passes through weight
It is folded also only to extend in the most adverse case.That is it is not present following dangerous, i.e. produce (formation) one when overlapping
Signal, such as signal M, it does not make or switch 2 is threaded off too late.
Checking signal M is sent by communication connection 6,7 respectively by one of switch 3 or 4 for setting below.(but principle
On can also be sent by the switch 2 above set.) its multiplicating, it is Specifically more within the prespecified duration respectively
Secondary repetition.
The exemplified checking signal M of Fig. 4 repeat every 10s cycle.
If switch 3 is the switch sent and switchs 2 and 4 and do not receive checking signal M, communication connection is 6,7 faulty,
This is for example indicated by the signal element set respectively on switch 2,4 herein.
Checking signal M signal length is so less than remaining signal IL so that signal IL is being determined by failure with testing
Card signal M time is reliably identified when upper overlapping.Only when two signal M and IL are sent simultaneously or almost simultaneously
Occur it is overlapping, here almost simultaneously refer within another signal IL signal length.
It should be noted that each switch 2,3,4 has an intrinsic time delay by structures shape respectively, it is not
It may be lower than, and be, for example, 35ms herein.It must respectively with it is above-mentioned for it is all switch 2,3,4 delay when
Between be added.
Claims (8)
1. a kind of method for being used to identifying and indicating the communication connection (6,7) of the failure in switchgear, the switchgear are
Distribution electric current from power supply (5) see with a switch above set (2) and at least two it is direct set behind switches (3,
4), wherein the electric current for flowing through the switch (3,4) directly set below also flows through the switch (2) above set, wherein, switch
Communication between (2,3,4) is carried out by communicating to connect (6,7) by data signal (M, IL), and
Wherein, signal (M, IL) transmission overlapping in time is entered with what signal (M, IL) overlapping on voltage was above set
Switch (2,3,4) place connection that row receives,
Characterized in that,
As checking signal signal (M), and if the checking signal are sent by switching (3) by communicating to connect (6,7) respectively
Being disappeared within the previously given duration, then remaining switch (2,4) indicates the communication connection (6,7) of failure respectively,
Wherein, the checking signal repeats within the prespecified duration respectively.
2. according to the method for claim 1, it is characterised in that
The signal (M, IL) is built by low state, and has different signal time length for the sake of distinguishing.
3. method according to claim 1 or 2, it is characterised in that
By the communication connection (6,7) of the signal element sign failure set on switch (2,3,4).
4. according to the method for claim 1, it is characterised in that
Repeat to the checking signal period.
5. the method according to one of Claims 1-4, it is characterised in that
The signal length of the checking signal is smaller than remaining signal (IL) so that remaining signal (IL) is tested with this in time
Reliably it is identified when demonstrate,proving signal overlap.
6. the method according to one of claim 1 to 5, it is characterised in that
The signal (M, IL) includes a postpones signal, its by the switch (3,4) that sets below respectively by communication connection (6,
7) send, to notify the switch (2) above set, current condition is satisfied and it is by interruptive current.
7. according to the method for claim 6, it is characterised in that
A prespecified time delay is provided, the switch above set (2) respectively will be de- after postpones signal (IL) is received
Button postpones the time delay.
8. a kind of current distribution units, the current distribution units (1) are seen with a switch above set (2) from power supply (5)
With at least two direct switches (3,4) that set behind, wherein flowing through the electric current of the switch (3,4) directly set below
Flow through the switch (2) above set, have and be used for the communication connection (6,7) that is communicated between (2,3,4) are switched, the communication by
Data signal (M, IL) is carried out, and
If there is signal (M, IL) transmission overlapping in time, then have on the switch (2) receive above set
Have that signal (M, IL) is overlapping on voltage,
Characterized in that,
Switch (3) and send signal (M) by communicating to connect (6,7) respectively as checking signal, and if the checking signal exists
Being disappeared in the previously given duration, then remaining switch (2,4) indicates the communication connection (6,7) of failure respectively,
Wherein, the checking signal repeats within the prespecified duration respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210419476.XA CN103683173B (en) | 2012-08-30 | 2012-08-30 | Identification and the method and current distribution units of the communication connection of sign failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210419476.XA CN103683173B (en) | 2012-08-30 | 2012-08-30 | Identification and the method and current distribution units of the communication connection of sign failure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103683173A CN103683173A (en) | 2014-03-26 |
| CN103683173B true CN103683173B (en) | 2017-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210419476.XA Expired - Fee Related CN103683173B (en) | 2012-08-30 | 2012-08-30 | Identification and the method and current distribution units of the communication connection of sign failure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110571753A (en) * | 2019-09-12 | 2019-12-13 | 珠海格力电器股份有限公司 | safety control method, device and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6313975B1 (en) * | 1998-05-08 | 2001-11-06 | Square D Company | Self-sourcing, isolated zone selective interlocking system for use with electronic trip circuit breakers |
| CN102246374A (en) * | 2008-12-10 | 2011-11-16 | 西门子公司 | Method and safety device for monitoring a bus bar of an electrical energy supply grid |
-
2012
- 2012-08-30 CN CN201210419476.XA patent/CN103683173B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6313975B1 (en) * | 1998-05-08 | 2001-11-06 | Square D Company | Self-sourcing, isolated zone selective interlocking system for use with electronic trip circuit breakers |
| CN102246374A (en) * | 2008-12-10 | 2011-11-16 | 西门子公司 | Method and safety device for monitoring a bus bar of an electrical energy supply grid |
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| Publication number | Publication date |
|---|---|
| CN103683173A (en) | 2014-03-26 |
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Granted publication date: 20171117 Termination date: 20200830 |