KR20210021689A - System and method for calculating operating time though commercial log analysis according to commercial log characteristics on the basis of the time current curve based on tolerance - Google Patents

Abstract

The present invention provides an operating time calculation system in which a time current curve (TCC) is a standard for tolerance application. The system comprises: a tolerance setting unit for setting the tolerance of corresponding equipment; a TCC generation unit for generating a first TCC or a second TCC corresponding to a limit of an allowable range by applying the tolerance based on a reference TCC; a current setting unit for setting an applied current value input to the reference TCC; and an operation time calculation unit for calculating an operation time of the first TCC or the second TCC corresponding to the applied current value. The first TCC or the second TCC is generated by translating the reference TCC by the minimum or maximum range of the tolerance. The operation time calculation unit is characterized in that the operation time is calculated through a commercial log calculation according to the commercial log characteristic of the first TCC or the second TCC. By calculating the operation time according to the allowable error range for the applied current value based on the reference TCC using commercial log analysis, it is possible to calculate the exact operation time, and it is possible to accurately design and engineer a small power system. It has the advantage of preventing economic damage due to an unexpected stop by securing circuit integrity in case of emergency.

Description

(SYSTEM AND METHOD FOR CALCULATING OPERATING TIME THOUGH COMMERCIAL LOG ANALYSIS ACCORDING TO COMMERCIAL LOG CHARACTERISTICS ON THE BASIS OF THE) TIME CURRENT CURVE BASED ON TOLERANCE}

The present invention relates to a system and method for calculating an operating time, and more particularly, to a system and method for calculating an operating time of a facility using a common log characteristic of a time-current curve.

The Time-Current Curve (TCC) is a curve showing the relationship between time and current, and is a graph showing the time the fuse is opened at a current of a specific size. The TCC is plotted based on the commercial log scale, and the larger the current, the shorter the time it takes to open the circuit fuse.

On the other hand, the operating time refers to the time from the moment the current is passed through the windings of relays or other electronic devices until the device performs a predetermined function. This is the time from when an input is given to the switching element until the switch is turned on or off. This is the data required to calculate the operating rate of a device or system.

In the case of MCCB (wiring circuit breaker) or fuse, approximate operation time is checked by applying a tolerance (±10%, ±20%, etc.) based on the test current value plotted with a vertical line on the time current curve presented by the manufacturer. do. However, applying the tolerance to the time-current curve based on the test current value does not take into account the commercial logarithmic characteristics of the time-current curve, and there is a problem in that the operating time may be incorrectly calculated.

The present invention relates to a system and method for calculating an operating time of a facility by analyzing the commercial log characteristics of a time-current curve, and an accurate operating time is calculated by setting the tolerance application criterion of the facility as a time-current curve.

In order to achieve the above object, the present invention provides a system for calculating an operating time in which a time current curve (TCC) is a criterion for application of a tolerance, comprising: a tolerance setting unit for setting a tolerance of a corresponding facility; A TCC generator configured to generate a first TCC or a second TCC corresponding to a limit of an allowable range by applying the tolerance based on a reference TCC; A current setting unit for setting an applied current value input to the reference TCC; And an operation time calculator configured to calculate an operation time of the first TCC or the second TCC corresponding to the applied current value, wherein the reference TCC is the minimum or It is generated by moving in parallel as much as a maximum range, and the operation time calculation unit calculates an operation time through a commercial log calculation according to the common log characteristic of the first TCC or the second TCC, based on the reference TCC. As a result, the operating time according to the allowable error range for the applied current value is calculated using a commercial logarithmic analysis.

Preferably, when the applied current value is ^{a value between 10 n} and 10 ⁿ⁺¹ , it is characterized in that it is calculated by an operation according to the following [Equation 1].

[Equation 1]

Here, x means the applied current value, A means ^{the length from 10 n} to the applied current value, and B means the length from 10 ⁿ to 10 ⁿ⁺¹ .

Preferably, the first TCC is a TCC corresponding to an allowable minimum standard among the allowable ranges of the reference TCC, and the second TCC is a TCC corresponding to the allowable maximum standard among the allowable ranges of the reference TCC, the reference The horizontal distance between the TCC and the first TCC is calculated by an operation according to the following [Equation 2], and the horizontal distance between the reference TCC and the second TCC is calculated by an operation according to the following [Equation 3].

[Equation 2]

Here, α denotes a horizontal distance between the reference TCC and the first TCC, x denotes an applied current value, and m denotes a tolerance. m is in percent.

[Equation 3]

Here, β denotes a horizontal distance between the reference TCC and the second TCC, x denotes an applied current value, and m denotes a tolerance. m is in percent.

In order to achieve the above object, the present invention provides a method for calculating an operating time in which a time current curve (TCC) is a criterion for applying a tolerance, the method comprising: (a) a tolerance setting step of setting a tolerance of a corresponding facility; (b) a TCC generation step of generating a first TCC or a second TCC corresponding to a limit of an allowable range by applying the tolerance based on a reference TCC; (c) a current setting step of setting an applied current value input to the reference TCC; And (d) calculating an operation time of the first TCC or the second TCC corresponding to the applied current value, wherein the first TCC or the second TCC is It is generated by moving in parallel as much as the minimum or maximum range of the tolerance, and the operation time calculation step is characterized in that the operation time is calculated through a common log calculation according to the common log characteristic of the first TCC or the second TCC, Based on the reference TCC, an operation time according to an allowable error range for the applied current value is calculated using a commercial log analysis.

According to the present invention, in calculating the operating time corresponding to the allowable range of a specific facility, the time current curve is used as the application standard of the tolerance. The time current curve is in the form of a common logarithmic scale. However, if the test current value is used as a tolerance application criterion without taking into account the graphical characteristics of the commercial log, the calculated operating time may be inaccurate. However, according to the present invention in which the time current curve is used as the application criterion of the tolerance, it is possible to calculate an accurate operation time since the characteristic of the commercial log is considered. Since the operation time calculated according to the present invention is accurate, there is an advantage that the risk of malfunction of the facility is low, and serious damage to the system and peripheral devices is not caused accordingly. In addition, there is an advantage of being able to accurately design and engineer a power system within a small area, and to secure circuit integrity in case of emergency to prevent economic damage due to an emergency stop.

1 shows a configuration diagram of a system for calculating an operating time according to an embodiment of the present invention.
2 shows a graph for analyzing a time current curve using a time current curve according to an embodiment of the present invention as a criterion for application of a tolerance.
3 shows a process of calculating an operating time of a facility in a method of calculating an operating time according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the contents described in the accompanying drawings. However, the present invention is not limited or limited by exemplary embodiments. The same reference numerals shown in each of the drawings indicate members that perform substantially the same function.

Objects and effects of the present invention may be naturally understood or more clearly understood by the following description, and the objects and effects of the present invention are not limited only by the following description. In addition, in describing the present invention, when it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 shows a configuration diagram of an operation time calculation system 1 according to an embodiment of the present invention.

The operating time calculation system 1 may use a time current curve TCC as a criterion for applying a tolerance. The operating time calculation system 1 may calculate the operating time according to the allowable error range for the applied current value by using a commercial log analysis using the TCC of the corresponding facility as a criterion for applying the tolerance.

Referring to FIG. 1, the operation time calculation system 1 may include a tolerance setting unit 11, a TCC generation unit 13, a current setting unit 15, and an operation time calculation unit 17. This configuration is defined for convenience of explanation and may not be physically classified and may be implemented in an integrated manner.

The tolerance setting unit 11 may set an allowable error of a corresponding facility. The tolerance can be set in various ways depending on the nature or type of the facility.

The TCC generator 13 may generate a first TCC or a second TCC corresponding to a limit of an allowable range by applying a tolerance to the TCC of the corresponding facility itself as a reference TCC. The first TCC or the second TCC may be generated by moving the reference TCC in parallel by the minimum or maximum range of the tolerance. The first TCC may be a TCC corresponding to the allowable minimum standard among the allowable ranges of the reference TCC, and the second TCC may be a TCC corresponding to the allowable maximum standard among the allowable ranges of the standard TCC.

The current setting unit 15 may set an applied current value input to the reference TCC. The applied current value can be calculated through an operation according to [Equation 1] when the current value is between 10 ⁿ A and 10 ^{n+1 A.}

[Equation 1]

Here, x means the applied current value, A means ^{the length from 10 n} to the applied current value (x), and B means the length from 10 ⁿ to 10 ⁿ⁺¹ .

In this case, if A is expressed as an equation, it can be expressed as the following [Equation 1].

[Equation 1]

A =

In addition, the horizontal distance between the reference TCC and the first TCC can be calculated by an operation according to [Equation 2].

[Equation 2]

Here, α denotes a horizontal distance between the reference TCC and the first TCC, x denotes an applied current value, and m denotes a tolerance. m is in percent.

For example, if the tolerance is 20 percent, the first TCC is translated to the left by applying a tolerance of 20 percent as the reference TCC. At this time, α, which is the horizontal distance between the reference TCC and the first TCC, can be expressed as the following [Equation 2].

[Equation 2]

The horizontal distance between the reference TCC and the second TCC can be calculated by an operation according to [Equation 3].

[Equation 3]

Here, β denotes a horizontal distance between the reference TCC and the second TCC, x denotes an applied current value, and m denotes a tolerance. m is in percent.

For example, if the tolerance is 20 percent, the second TCC is translated to the right by applying a tolerance of 20 percent as the reference TCC. In this case, β, which is the horizontal distance between the reference TCC and the second TCC, can be expressed as the following [Equation 3].

[Equation 3]

The operation time calculator 17 may calculate an operation time of the first TCC or the second TCC corresponding to the applied current value. The operation time calculation unit 17 may calculate an operation time by calculating a common log according to the common log characteristic of the first TCC or the second TCC. Since the TCC is plotted based on the commercial log scale, the operation time must be calculated by analyzing the TCC based on understanding the properties of the commercial log.

2 shows a graph for analyzing a time current curve using a time current curve according to an embodiment of the present invention as a criterion for application of a tolerance.

In the operation time calculation system (1), the TCC, which is the criterion for applying the tolerance, is plotted based on the commercial log scale, so the operation time must be calculated by analyzing the TCC based on the understanding of the commercial log property.

Operation time calculation process

1. Secure the TCC graph through the manufacturer's catalog or manual, and check the tolerance of the operating time of the item.

2. Authorization for the operation test of the item

After selecting the current value, plot the current value to which the tolerance is applied and analyze the TCC graph.

3. Calculate the α value, which is the horizontal distance between the reference TCC and the first TCC, based on the common logarithmic property, and calculate the value β, which is the horizontal distance between the reference TCC and the second TCC.

4. Using the calculated α and β values, calculate the minimum and maximum operation time for the item in the TCC graph.

5. Authorization of the item through commercial log calculation logic or TCC digitizing based on the property of commercial log

Calculate the operating time at the current value.

3 is another embodiment according to the invention, showing a process of calculating the operating time of the facility. In the operation time calculation system (1), step (a) of setting the tolerance, step (b) of generating two TCCs, step (c) of setting the applied current value, and step (d) of calculating the operating time are performed. Can include.

Step (a) refers to the step of setting the tolerance of the facility. Step (b) refers to a step of generating the first TCC or the second TCC corresponding to the limit of the allowable range by applying a tolerance based on the reference TCC. Step (c) refers to a current setting step of setting an applied current value input to the reference TCC. Step (d) refers to an operation time calculation step of calculating an operation time of the first TCC or the second TCC corresponding to the applied current value. The first TCC or the second TCC is generated by moving the reference TCC in parallel by the minimum or maximum range of the tolerance, and the operation time calculation step is the operation time by calculating the common log according to the common log characteristics of the first TCC or the second TCC. It is characterized in that it calculates, it is possible to calculate the operation time according to the allowable error range for the applied current value based on the reference TCC using a commercial log analysis. Steps (a) to (d) show processes performed in the embodiment of the operation time calculation system 1 described above, and the meaning and significance of each step have been described above, and redundant descriptions will be omitted.

Although the present invention has been described in detail through exemplary embodiments above, those of ordinary skill in the art to which the present invention pertains will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. will be. Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should be determined by all changes or modifications derived from the claims and the concept of equality as well as the claims to be described later.

1: operation time calculation system
11: Tolerance setting section
13: TCC generator
15: current setting unit
17: operation time calculation unit

Claims (4)

In the operating time calculation system in which the time current curve (TCC) is the criterion for application of tolerance,
Tolerance setting unit for setting the tolerance of the facility;
A TCC generator configured to generate a first TCC or a second TCC corresponding to a limit of an allowable range by applying the tolerance based on a reference TCC;
A current setting unit for setting an applied current value input to the reference TCC; And
An operation time calculator for calculating an operation time of the first TCC or the second TCC corresponding to the applied current value,
The first TCC or the second TCC,
The reference TCC is generated by moving in parallel by the minimum or maximum range of the tolerance,
The operation time calculation unit,
It characterized in that the operation time is calculated through a commercial log calculation according to the common log characteristic of the first TCC or the second TCC,
An operation time calculation system for calculating an operation time according to an allowable error range for the applied current value based on the reference TCC using a commercial log analysis.
The method of claim 1,
The applied current value is,
In the ^{case of a value between 10 n} and 10 ⁿ⁺¹ , the operation time calculation system is calculated by an operation according to the following [Equation 1].
[Equation 1]

Here, x means the applied current value, A means ^{the length from 10 n} to the applied current value, and B means the length from 10 ⁿ to 10 ⁿ⁺¹ .
The method of claim 1,
The first TCC,
It is a TCC that corresponds to the minimum allowable standard among the allowable ranges of the standard TCC,
The second TCC,
In the case of a TCC that falls within the allowable maximum standard among the allowable ranges of the standard TCC,
The horizontal distance between the reference TCC and the first TCC is calculated by an operation according to the following [Equation 2],
The operation time calculation system characterized in that the horizontal distance between the reference TCC and the second TCC is calculated by an operation according to the following [Equation 3].
[Equation 2]

Here, α denotes a horizontal distance between the reference TCC and the first TCC, x denotes an applied current value, and m denotes a tolerance. m is in percent.
[Equation 3]

Here, β denotes a horizontal distance between the reference TCC and the second TCC, x denotes an applied current value, and m denotes a tolerance. m is in percent.
In the method of calculating the operating time in which the time current curve (TCC) is the criterion for application of tolerance,
(a) a tolerance setting step of setting a tolerance of the facility;
(b) a TCC generation step of generating a first TCC or a second TCC corresponding to a limit of an allowable range by applying the tolerance based on a reference TCC;
(c) a current setting step of setting an applied current value input to the reference TCC; And
(d) an operation time calculation step of calculating an operation time of the first TCC or the second TCC corresponding to the applied current value,
The first TCC or the second TCC,
The reference TCC is generated by moving in parallel by the minimum or maximum range of the tolerance,
The operation time calculation step,
It characterized in that the operation time is calculated through a commercial log calculation according to the common log characteristic of the first TCC or the second TCC,
An operation time calculation method for calculating an operation time according to an allowable error range for the applied current value based on the reference TCC using a commercial log analysis.

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