CN109961983A - The time relay and its control method - Google Patents
The time relay and its control method Download PDFInfo
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- CN109961983A CN109961983A CN201711437015.4A CN201711437015A CN109961983A CN 109961983 A CN109961983 A CN 109961983A CN 201711437015 A CN201711437015 A CN 201711437015A CN 109961983 A CN109961983 A CN 109961983A
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- current
- value
- differential
- time point
- current value
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
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Abstract
Present disclose provides a kind of time relays, comprising: current detecting unit, for detecting electric current in multiple time points of a period of time；Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, obtains input current value, and the input current value is subtracted each other with pre-set current value, obtains current differential；Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；First comparing unit compares by the current differential and with preset threshold, if the current differential and on the preset threshold, acts the time relay.The disclosure additionally provides a kind of control method of time relay.
Description
Technical field
This disclosure relates to a kind of relay field more particularly to a kind of time relay and its control method.
Background technique
The time relay functions primarily as one of simple program control performer, when it receives starting
Start timing after signal, the movement that its working contact is opened or closed after timing, so that subsequent circuit be pushed to work.
In general, the delay performance of the time relay is adjustable in the range of design, to facilitate its delay of adjustment
Length of time.
And in the time relay in use, inverse-time overcurrent protection would generally be used.But inverse time in the prior art
The shortcomings that limiting overcurrent protection is more complex for time coordinations.
Summary of the invention
In order to solve the above-mentioned technical problem, present disclose provides a kind of computer management systems.
According to one aspect of the disclosure, a kind of time relay, comprising:
Current detecting unit, for detecting electric current in multiple time points of a period of time；
Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described pre-
If on threshold value, then acting the time relay.
According to the disclosure specific embodiment, when the electric current at some time point at the multiple time point
When difference is positive value, add operation is carried out to the current differential at some time point.
It further include the second comparing unit, when certain of the multiple time point according to the disclosure specific embodiment
When the current differential at one time point is negative value, then the second comparing unit compares input current value and default reset current
Value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
It further include relay resetting control unit, if when input current according to the disclosure specific embodiment
Value is less than default reset current value, then by the current differential at time point before and is set as zero, and reset to the relay
Control unit output control signal, to be reset to the time relay.
According to the disclosure specific embodiment, which is characterized in that it further include relay trip control unit, if
First comparing unit relatively obtains the current differential and on the preset threshold, then the first comparing unit output control
Signal processed, the relay trip control unit for being is acted, to cut off input current.
According to another aspect of the present disclosure, a kind of control method of the time relay, comprising:
Current detecting unit detects electric current in multiple time points of a period of time；
Computing unit receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described default
On threshold value, then act the time relay.
According to the disclosure specific embodiment, when the electric current at some time point at the multiple time point
When difference is positive value, add operation is carried out to the current differential at some time point.
It further include the institute when some time point at the multiple time point according to the disclosure specific embodiment
State current differential be negative value when, then the second comparing unit compares input current value and default reset current value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
According to the disclosure specific embodiment, if further including when input current value is less than default reset current
Value then by the current differential at time point before and is set as zero, and to relay resetting control unit output control signal, from
And the time relay is reset.
According to the disclosure specific embodiment, which is characterized in that if further including that the first comparing unit compares
The current differential and on the preset threshold out, then the first comparing unit output control signal, so that relay
Trip control unit is acted, to cut off input current.
Detailed description of the invention
Attached drawing shows the illustrative embodiments of the disclosure, and it is bright together for explaining the principles of this disclosure,
Which includes these attached drawings to provide further understanding of the disclosure, and attached drawing is included in the description and constitutes this
Part of specification.
Fig. 1 is the schematic diagram of the time relay in accordance with one embodiment of the present disclosure.
Fig. 2 is the schematic diagram according to the time relay of another embodiment of the disclosure.
Specific embodiment
The disclosure is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is only used for explaining related content, rather than the restriction to the disclosure.It also should be noted that in order to just
Part relevant to the disclosure is illustrated only in description, attached drawing.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the disclosure can phase
Mutually combination.The disclosure is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In the disclosure:
According to one aspect of the disclosure, a kind of time relay, comprising:
Current detecting unit, for detecting electric current in multiple time points of a period of time；
Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and input current value and pre-set current value are subtracted each other, obtain current differential；
Addition unit carries out additional calculation to the current differential at multiple time points, obtain current differential and；
First comparing unit compares by current differential and with preset threshold, if current differential and on preset threshold,
Act the time relay.
According to the disclosure specific embodiment, when the current differential at some time point at multiple time points is positive
When value, add operation is carried out to the current differential at some time point.
It further include the second comparing unit, when some of multiple time points according to the disclosure specific embodiment
When the current differential at time point is negative value, then the second comparing unit compares input current value and default reset current value,
If input current value is greater than default reset current value, addition unit is by the current differential of negative value and time point before
Current differential and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
It further include relay resetting control unit, if when input current according to the disclosure specific embodiment
Value is less than default reset current value, then by the current differential at time point before and is set as zero, and reset and control to relay
Unit output control signal, to be reset to the time relay.
According to the disclosure specific embodiment, which is characterized in that it further include relay trip control unit, if
First comparing unit relatively obtains current differential and on preset threshold, then the first comparing unit output control signal, yes
Relay trip control unit is acted, to cut off input current.
According to another aspect of the present disclosure, a kind of control method of the time relay, comprising:
Current detecting unit detects electric current in multiple time points of a period of time；
Computing unit receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and input current value and pre-set current value are subtracted each other, obtain current differential；
Addition unit carries out additional calculation to the current differential at multiple time points, obtain current differential and；
First comparing unit compares by current differential and with preset threshold, if current differential and on preset threshold,
Act the time relay.
According to the disclosure specific embodiment, when the current differential at some time point at multiple time points is positive
When value, add operation is carried out to the current differential at some time point.
It further include the current difference when some time point at multiple time points according to the disclosure specific embodiment
When value is negative value, then the second comparing unit compares input current value and default reset current value,
If input current value is greater than default reset current value, addition unit is by the current differential of negative value and time point before
Current differential and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
According to the disclosure specific embodiment, if further including when input current value is less than default reset current
Value then by the current differential at time point before and is set as zero, and to relay resetting control unit output control signal, from
And the time relay is reset.
According to the disclosure specific embodiment, if further include the first comparing unit relatively obtain current differential and
On preset threshold, then the first comparing unit output controls signal, so that relay trip control unit is acted, thus
Cut off input current.
According to the disclosure specific embodiment, wherein the preset threshold is the given threshold of inverse time-lag protection,
Wherein the given threshold is equal to the product of proportionality coefficient, the pre-set current value and described a period of time.
Embodiment of the present disclosure is specifically described with reference to the accompanying drawing.
With reference first to Fig. 1, the time relay includes current detecting unit 10.Current detecting unit 10 can be used for detecting defeated
Enter current value.Such as it can be current transformer.And the current value for detecting multiple time points in a period of time, these
Time point can be spaced 0.1 second etc..
Computing unit 11 is carried out for receiving the signal for the electric current that current detecting unit 10 detects, and to the signal
It calculates, obtains input current value, and the input current value is subtracted each other with pre-set current value, obtain current differential.
Addition unit 12 carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit 13, compares by the current differential and with preset threshold, if the current differential and described
On preset threshold, then act the time relay.
In an embodiment of the disclosure, when the current differential at some time point at the multiple time point
When for positive value, add operation is carried out to the current differential at some time point.
It further include the second comparing unit 16, when the multiple for example, see Fig. 2 in another embodiment of the disclosure
When the current differential at some time point at time point is negative value, then the second comparing unit 16 compares input current value and pre-
If reset current value,
If input current value is greater than default reset current value, the addition unit 12 by the current differential of negative value therewith
The current differential at preceding time point and add operation is carried out, and by acquired value the first comparing unit of input, 1；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
It further include relay resetting control unit 15, if when input current value in an embodiment of the disclosure
Less than default reset current value, then by the current differential at time point before and zero is set as, and reset and control to the relay
The output of unit 15 control signal processed, to be reset to the time relay.
It further include relay trip control unit 14 in an embodiment of the disclosure, if the first comparing unit
13 compare and obtain the current differential and on the preset threshold, then the output of the first comparing unit 13 control signal,
So that the relay trip control unit 14 is acted, to cut off input current.
According to the disclosure specific embodiment, wherein the preset threshold is the given threshold of inverse time-lag protection,
Wherein the given threshold is equal to the product of proportionality coefficient, the pre-set current value and a period of time.To according to the threshold of the setting
Value can carry out inverse time-lag protection control to the time relay.Wherein the numberical range of the proportionality coefficient can be 1 to 1.2,
Phase can be by artificially being set.
According to one aspect of the disclosure, a kind of control method of above-mentioned time relay is additionally provided.
In disclosed method, the input current value in multiple time points of a period of time is obtained first.
Obtained input current value is compared with pre-set current value, obtains current differential.
If current differential is positive value, it is added with the sum of the current differential obtained before, and when by this section
Between the sum of obtained current differential compared with the given threshold of inverse time-lag protection, if should and greater than inverse time-lag protection setting
Threshold value then cuts off input current by control relay.
If the current differential is negative value, input current is compared with default reset current value, if input electricity
Stream is less than default reset current value, then resets the sum of current differential being calculated before, and reset time relay；Such as
Fruit input current is greater than default reset current value, then by the sum of the current differential of negative value and the current differential that is calculated before phase
Add, then the sum of obtained current differential compares with the given threshold of inverse time-lag protection, is protected if should and be greater than the inverse time lag
The given threshold of shield then cuts off input current by control relay.
According to the disclosure specific embodiment, wherein the preset threshold is the given threshold of inverse time-lag protection,
Wherein the given threshold is equal to the product of proportionality coefficient, the pre-set current value and described a period of time.To according to the setting
Threshold value, can to the time relay carry out inverse time-lag protection control.Wherein the numberical range of the proportionality coefficient can for 1 to
1.2, the phase can be by artificially being set.
It will be understood by those of skill in the art that above embodiment is used for the purpose of clearly demonstrating the disclosure, and simultaneously
Non- be defined to the scope of the present disclosure.For those skilled in the art, may be used also on the basis of disclosed above
To make other variations or modification, and these variations or modification are still in the scope of the present disclosure.
Claims (10)
1. a kind of time relay characterized by comprising
Current detecting unit, for detecting electric current in multiple time points of a period of time；
Computing unit, receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described pre-
If on threshold value, then acting the time relay.
2. the time relay as described in claim 1, which is characterized in that when some time point at the multiple time point
When the current differential is positive value, add operation is carried out to the current differential at some time point.
3. the time relay as claimed in claim 2, which is characterized in that further include the second comparing unit, when the multiple
Between the current differential at some time point put when being negative value, then the second comparing unit compares input current value and default weight
Current value is set,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
4. the time relay as claimed in claim 3, which is characterized in that it further include relay resetting control unit, if when
Input current value is less than default reset current value, then by the current differential at time point before and is set as zero, and to it is described after
Electric appliance resets control unit output control signal, to reset to the time relay.
5. the time relay according to any one of claims 1 to 4, which is characterized in that further include relay open circuit control
Unit, if the first comparing unit relatively obtains the current differential and on the preset threshold, described first compares
Unit output control signal, so that the relay trip control unit is acted, to cut off input current.
6. a kind of control method of the time relay characterized by comprising
Current detecting unit detects electric current in multiple time points of a period of time；
Computing unit receives the signal for the electric current that current detecting unit detects, and calculates the signal, is inputted
Current value, and the input current value is subtracted each other with pre-set current value, obtain current differential；
Addition unit carries out additional calculation to the current differential at the multiple time point, obtain current differential and；
First comparing unit compares by the current differential and with preset threshold, if the current differential and described default
On threshold value, then act the time relay.
7. method as claimed in claim 6, which is characterized in that when the electricity at some time point at the multiple time point
When stream difference is positive value, add operation is carried out to the current differential at some time point.
8. the method for claim 7, which is characterized in that further include some time point when the multiple time point
When the current differential is negative value, then the second comparing unit compares input current value and default reset current value,
If input current value is greater than default reset current value, the addition unit is by the current differential of negative value and before
The current differential at time point and progress add operation, and acquired value is inputted into the first comparing unit；
If input current value is less than default reset current value, by the current differential at time point before and it is set as zero.
9. method according to claim 8, which is characterized in that if further including when input current value is less than default reset current
Value then by the current differential at time point before and is set as zero, and to relay resetting control unit output control signal, from
And the time relay is reset.
10. the method as described in any one of claim 6 to 9, which is characterized in that if further including that the first comparing unit compares
It obtains the current differential and on the preset threshold, then the first comparing unit output controls signal, so that relay
Device trip control unit is acted, to cut off input current.
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|---|---|---|---|
| CN201711437015.4A CN109961983A (en) | 2017-12-26 | 2017-12-26 | The time relay and its control method |
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| CN201711437015.4A CN109961983A (en) | 2017-12-26 | 2017-12-26 | The time relay and its control method |
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| CN109961983A true CN109961983A (en) | 2019-07-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681265A (en) * | 2018-03-23 | 2018-10-19 | 高湍斌 | The time relay and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108681265A (en) * | 2018-03-23 | 2018-10-19 | 高湍斌 | The time relay and its control method |
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Application publication date: 20190702 |