EP3785340A1

EP3785340A1 - A device for displaying breaker related data in real-time and a method thereof

Info

Publication number: EP3785340A1
Application number: EP19736485.4A
Authority: EP
Inventors: Manigandan P; Hardik DAVE; Jithin KP; Saurabh Singh; Arinjai Gupta
Original assignee: ABB Schweiz AG
Current assignee: ABB Schweiz AG
Priority date: 2018-04-23
Filing date: 2019-04-22
Publication date: 2021-03-03
Also published as: WO2019207459A1

Abstract

The present invention discloses an IED for enabling operations of a circuit breaker connected in power distribution system by displaying real-time data related to the circuit breaker. The IED receives values of status of signals from one or more measurement devices. An application function is configured in the IED comprising logical functionalities of the status of the signals. The IED executes the application function and validates the values of the status of the signals by comparing it with reference values of status of the signals. The validated values of the status of the signals are configured for displaying on a LHMI configured in the IED, When the values of the status are updated, the IED receives the updated values and validates the updated values and configures the updated values to be displayed on the LHMI. At any instant of time, a predefined number of values are displayed on the LHMI.

Description

TITLE: "A DEVICE FOR DISPLAYING BREAKER RELATED DATA IN REAL-TIME AND A METHOD THEREOF"

TECHNICAL FIELD

The present disclosure relates In general to displaying circuit breaker related data. More specifically, the present disclosure relates to configuring a device for displaying real time data associated with circuit breakers for enabling operations of the circuit breakers.

BACKGROUND

In a power system, it is imperative to protect power equipment (e.g., transformers, transmission lines, generators, and other electrical equipment alike) from faults caused due to short circuit, over voltage, and various other faults due to electrical loads/source and operation of the power system. An Intelligent Electronic Device (IED) (also referred as protection relay) is generally used for protection of power equipment in the power distribution system by operating a circuit breaker connected in an electrical power line with the power equipment, when a fault is detected by the IED in the power line/equipment.

The IED is configured for performing various functions relating to control and protection including fault indication. The information related to faults are displayed on a Local Human Machine interface (LHMI) provided in the IED.

Generally, the IED is configured to operate the circuit breaker to open and isolate, or to close and connect with help of application or control functions in the IED. The IED is configured to receive signals from measurement equipment connected in the power line and process these signals to identify faults and operate the circuit breaker by providing a signal to the circuit breaker. The information related to the measurement signal, fault and configurations made in the IED are available for displaying in the LHMI.

A control function to operate the circuit breaker connected to an IED can be a logical function comprising several status signals, reference signals and several Boolean (logical) operations. When a control function relating to a breaker (breaker control function) configured with logical connections/functions has been initiated by an operator of the IED and has failed to operate the circuit breaker (e.g., close the circuit breaker) resulting from the unsuccessful execution of the control function, there are difficulties in identifying the exact cause of failure for unsuccessful execution of the control function.

The invention describes a provision made in the IED to display the causes of failure for unsuccessful execution of the control function to operate the circuit breaker and thereby provide assistance to the operator of the IED to diagnose the cause for the failure by identifying status of the signals processed in the control function.

SUMMARY

Various aspects of the invention relate to an Intelligent Electronic Device (IED) for enabling operations of a circuit breaker in a power distribution system by displaying real-time information on Local Human Machine Interface (LHMI) configured in the IED. Throughout the disclosure, various embodiments are described by considering a fault has occurred in a power equipment in the power distribution system. The IED receives signals comprising electrical and physical parameters of the power equipment from one or more measurement devices provided in the power system at predefined time intervals. The electrical parameters can include at least one of, a current, a voltage and one or more derived parameters. The physical parameters can include conditions of the power equipment comprising at least one of a temperature of the equipment, position of contacts of circuit breakers, vibrations in the equipment, etc. The one or more measurement device can include, but are not limited to, a current transformer, a voltage transformer, a temperature sensor, a vibration sensor, a position sensor, etc. Further, the IED processes the signals to obtain a status of each signal. In an embodiment, the signals can be processed by an alternate unit/ device/ system, and IED can receive the status of the signals. The value of the status of the received signals is stored in a dedicated/ shared memory (also referred as LHM I memory throughout the disclosure). The LHMI memory is a part of the main memory associated with the processor, which is dedicated to store the value of the status of the received signals.

The IED is configured with an application function including logical functions of the status of the signals. The application function is configured to be executed by the IED using a value of the status of the signals when personnel provides an input to the IED (e.g., reset the breaker) to control the circuit breaker associated with the IED. An outcome of the execution of the application can be different from an expected outcome when a value of the status of t the signals is different from a value of the status of a reference signal. The !ED stores the value of status of reference signal. In an embodiment, each received signal can have a corresponding reference signal. Examples of status of the signals can include "OK", "KO", etc. The status "OK" can indicate that the value of the status of the received signals matches the value of the status of corresponding reference signal. When the outcome of the application function is different from the expected outcome, the value of status of the received signals stored in the LHMI memory are validated by comparing the value of the received signals with value of corresponding reference signals to determine exact cause of the different outcome of the application function. Upon validating, the value of the status of the received signals are configured to be displayed on the LHMI provided in the I ED. in an embodiment, only a predefined number of values among the value of the status of the received signals are configured to be displayed on the LHM I. In an embodiment, at any instant of time, the number of values displayed on the LHMI is less than the number of values stored in the IED. in an embodiment, the IED identifies a value of the status of the at least one received signal different from the value of the status of corresponding reference signal. The value of the status of the at least one received signal is configured for displaying on the LHMI. The value of the status of the at least one received signal is less than or equal to the predefined number of values the LHMI provisions for displaying. In an embodiment, the predefined number of values configured to be displayed on the LHMI is calculated based on dimensions of a screen provided in the LHM I. in an embodiment, the value of status of the received signals can change due to various reasons including effects of temperature, and the like in an embodiment, the changed value of the status of the signals can be referred as updated value of the status of the received signals throughout the disclosure. Consequently, the IED identifies updated value of the status of the signals and configures the updated value of the status of the signals for displaying on the LHMI in an embodiment, the IED can validate the updated value of the status of the received signals to ensure that the value is not changed again. The validation of the updated value can be referred as pre-operate check in the present disclosure in an embodiment, a predefined number of values from the updated value of the status of the received signals are configured for displaying. For example, consider there are 10 signals, each having a value indicating a status. Consider that the LHMI provisions only 2 values for displaying. Thus, only 2 values among the values of the 10 signals are displayed on the LHMI.

In an embodiment, the LHMI can be a part of the IED, or it can be an independent module configured to be mounted on the IED. The LHMI comprises a screen for displaying the predefined number of. The screen can have predefined dimensions. In an embodiment, the displayed values on the screen can enable the personnel for performing one or more actions (e.g., reset the circuit breaker). BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:

Figure 1 is a representation of an IED configured to operate circuit breakers, in accordance with an embodiment of the present invention;

Figure 2 is a simplified block diagram of an IED configured to display information related to faults on a LHMI configured in the IED, in accordance with an embodiment of the invention;

Figure 3 is a simplified representation of functional logic of an application program, in accordance with an embodiment of the present invention;

Figure 4a-4e are a simplified representation of a screen of a LHMI for displaying real- time information related to faults, in accordance with an embodiment of the present disclosure;

Figure 5 is a simplified block diagram illustrating memory management in the IED for displaying information related to faults on a LHMI, in accordance with an embodiment if the invention; Figure 6a-6f are a simplified representation of a screen of a LHMI for configuring pre operate check to enable operations of a breaker, in accordance with an embodiment of the present disclosure; and

Figure 7 is a flowchart illustrating method steps for displaying information related to faults on a LHMI, in accordance with an embodiment of the present disclosure;

Various embodiments of the present invention relate to an IED configured to display real-time information on a Local Human Machine Interface (LHMI). The IED is provided with a feature to diagnose the breaker close failed operation and also check (validate) the breaker close operation before the operation (pre-operate check) of the breaker via the LH I. Thus, the IED has the capability to detect exact cause of failure and display on LHMI to help user to understand the situation to perform faster possible resolving action. As an added feature, IED has a provision to perform pre-operate check to detect any cause of failure, this shall help user to fix the causes before operating a breaker. By this design, it shall be possible to save time and effort for analyzing the cause of failure and resolve quickly. These device actions shall be logged internally for the future reference which shall be downloaded and read manually. The real-time information displayed on the LHMI enables operations to be performed relating to the circuit breakers. In an embodiment, the real-time information displayed on the LHMI is also used to perform maintenance operations in the power distribution system.

With reference to Figure 1, a substation (100) is shown comprising one or more power equipment (105), an IED (101), a voltage transformer (VT) (102), a current transformers (CT) (103), a circuit breaker (104). The IED (101) receives signals associated with electrical parameters of the power equipment (105) from the CTs (103) and VTs (102) via the process bus (not shown). There can be other measuring/sensing devices (not shown) that provide measure/status relating to a condition of the power equipment including the circuit breaker being operated by the IED (for e.g., contact status in the circuit breaker, temperature of a component in a power equipment) in the power distribution system. The electrical and the physical parameters can be published in the process bus and the IED (101) can subscribe the process bus for receiving the electrical and the physical parameters or receive the information through the input and output interface having provisions for receiving analog and digital signals. The electrical and the physical parameters are processed by the IED (101) for obtaining a status of the signals. Referring to Figure 2, a simplified block diagram of an IED (101) is represented. The

IED (101) comprises an input/ output interface (I/O interface) (201), a memory (202), a processor (203), application/control function(s) (204), and a Local Human Machine Interface (LHMI) (205). The LHMI (205) comprises a screen (206) for display means for input and controls (207) for providing inputs including settings & configurations to the IED.

In an embodiment, the memory (202) is associated with the processor (203) and can be used for processing functions associated with different components and can also be shared with different components of the IED. For example, a predefined portion of the memory (202) can be shared with the LHMI (205). The predefined portion of the memory (202) shared with the LHMI can he denoted as LHMI memory throughout the present disclosure. The LHMI memory acts as a buffer for the display and inputs received from the operator. The memory (202) can store data associated with the application (control) function (204). The data can include at least one of the value of status of the reference signals. The data is stored in portion of the memory apart from the LHMI memory. The LHMI memory stores values of status derived from the received signal. The pre-processed signal (derived status from the electrical signals) is referred as status of the received signal and a value associated with the status is a Boolean value (0 or 1).

The I/O interface (201) receives the signals comprising the electrical and the physical parameters from the CT (103), the VT (102) and other sensors/measuring devices connected in the substation. The I/O interface (201) can receive the signals at predefined time intervals. The signals from the I/O interface (201) are fetched by the processor (203) for processing the application/contro! function. The processor can perform pre-processing for determining a status from the measured/sensed signals.

There can be pre-processing or computing by the processor of the IED (101) to determine binary status from a signal as a binary status information by comparing the measured value or derived value from the measurement/sensor signals with a reference value for logical combination in the control function. The processor (203) is configured to execute the application function (204) using the binary value of the received signals. The execution of the control function (204) outputs a logical value (e.g. a Boolean value) that is configured for use to operate the circuit breaker associated with the IED and as per the control function (e.g., a "Enable close" status signal for close operation of the circuit breaker derived from a control function where the control function combines status from various signals in a logical manner using "OR", "AND", "NOT" binary operations).

For example, a logical function can comprise one or more logical blocks formed based on Boolean operations combining the status signals. Each logical block can have one or more inputs and one or more outputs as per the configuration to execute the control function to operate the breaker. Figure 3 shows a schematic of simple logic blocks with signals formed from status measured/derived from the inputs received by the IED or from the measurements made by the IED. As shown in the Figure, the control function has a circuit breaker (CB) block (301) that receives inputs (status signals) from an AND1 logic block (302). The AND1 logic block (301) in turn receives inputs from an OR1 logic block (303) and an OR2 logic block (304). Further, the OR1 logic block (303) receives inputs from an AND2 logic block (305) and an AND3 logic block (306). In this example, the control application when executed provides an "enable_c!ose" signal to close the circuit breaker based on a logical condition as defined in the control application function in the case any of the signal status is not as per expectation, the logical function on execution will not be able to perform enabling circuit breaker close function.

In an embodiment, the processor (203) can provide a unique ID to each status of the received signals (signals received from the logic blocks) and also store in the LHMI memory for display one or more signal status to the operator. Table 1, provided below illustrates a representation of storing each status of the received signals along with the unique ID in the LHMI memory. As shown in the Table 1, a place holder is provided to each status of the signal. The place holder of a first status of the signal represents base array of status of the received signals logically associated with the first status of the signal. For example, the place holder of status of the received signal "Ena close" is "19". Here, the place holder "19" corresponds to base array of the status of the signal received from the AIMDl logic block (302).

TABLE 1

In an event of a failure i.e. unsuccessful execution of the control function formed with the signals and its status as in the example provided with representations in the Table 1, the logical output from the control function is different from the expected outcome, for example the signal "Enable close" for the circuit breaker upon execution of the control function results in a "0" instead of "1" for enabling close operation in the circuit breaker, the I ED is configured to display the failure of close operation and also provide with an option to diagnose the failure of close operation. Such display of the status and the option to diagnose is not limited to only the dose operation but to all the operation/function (e.g , open, bypass etc) connected with the circuit breaker.

Figure 4a shows a simple diagram of a screen showing failure of breaker operation. As shown, the screen (206) shows a message that the breaker operation has failed. Also, the screen (206) provides an option to diagnose the failure. When the user opts to diagnose (user press/ selects the diagnose option), the processor (203) validates the value of the received signals to identify exact source causing the failure of the breaker operation.

For validating the value of the received signals, the processor (203) compares the binary value of each of the received signal with the binary value of corresponding reference signals. For example, the received signal "enable close" for the breaker has a binary value of 1. The reference signal "enable dose" has a binary value 0. The comparison between the binary values of the received signal and the corresponding reference signals does not match. Thus, the received signal is not as per the expectation and is a cause for the failure of the breaker operation. The comparison is performed for all such signals received by the IED (101). Such inconsistency/ mismatch in the binary value of the received signals is identified by the processor (203) for signals connected with the circuit breaker block (301) and also through the drill down of the control function block associated with received signal resulting in the failure of execution.

Further, when the mismatch/ inconsistency occurs, the status for that signal is set as "KO" for display purpose as an example (other representations or use of binary values can also be done). If the binary value of the signal matches the binary value of the reference signal, then the status is set as "OK" in this example. A person skilled in the art should know that any such status can be set that conveys that the binary value of the received signal does not match or match the binary value of the reference signal. In an embodiment, the signal "Enable dose" is derived from a logical block "circuit breaker" as shown in Figure 3. The logical block "circuit breaker" is further connected to other logical blocks like "AND", "OR", "NOT", etc. The connection between the logical blocks resemble a tree structure with the circuit breaker as a primary node (root node). The validation can be extended to the other logical blocks by traversing in a backward direction through the tree structure, thereby identifying a source logical block causing the unexpected outcome of the application/ control function (204). The result of validation is then displayed on the screen (206). The screen (206) is configured to display a predefined amount of data (predefined characters/ values) based on dimensions of the screen (206). Thus, multiples pages are used to display entire content configured to be displayed on the screen (206). Figure 4b shows a page displaying breaker diagnostics. As shown, the breaker

"CBXCBR1" is associated with the status "KO". The failure operation of breaker can be caused due to an unexpected value of a signal received at the input of the breaker. Thus, input of the breaker and values of signals received at the input can be seen by selecting the breaker in the screen (206). Figure 4b shows diagnostics of the breaker. The inputs of the breaker and status associated with the input signals are shown. As show, the input signal "Ena_close" is associated with status "KO". Thus, one or more logical blocks connected to the "Ena_ciose" can be validated to identify the source of the failure operation. Figures 4c-4e shows how the user navigates through the screen (206) to see the source logic block causing the breaker operation failure. in an embodiment, the screen (206) provided in the LHM I (205) can display the binary value of all the received signals along with the logical node information and an associated status ("OK", "KO"). in another embodiment, the screen (206) is configured to display only the binary value of the signals which are different from the binary value of the corresponding reference signals (display only the logic block "AND3" and corresponding status "KO". The user can see the status of the logical nodes to appropriately operate the circuit breaker/ decide for maintenance. The screen (206) has a predefined dimension, thus provisioning only predefined number of binary values/ characters to be displayed. If the binary value of the received signals are more than the predefined number of binary values, then the binary value of received signals are displayed on one or more pages in the screen (206). Each page is configured to display the predefined number of binary values at any instant of time.

Further, at any instant of time, only one page is displayed in the screen (206). For example, the screen (206) can be provisioned to display only 5 binary values, corresponding status and name of the functional block. Considering 20 binary values to be displayed on the screen (206), a first page can display first 5 binary values and a second page can display subsequent 5 binary values. Likewise, a third screen and a fourth screen can display 5 values each such that all the 20 values are displayed. A person skilled in the art would understand that, likewise many pages can be configured in the screen (206) and each screen (206) is provisioned to display the predefined number of binary value.

In an embodiment, the processor (203) renders the predefined number of values from the LHMI memory for displaying on the screen (206). The binary values stored in the LHMI memory can be less than the number of binary stored in the memory (202). Figure 5 illustrates memory management by the processor (204) in the IED (101). As seen in Figure 5, the LHMI memory can be a segment of the memory (202). In an embodiment, the LHMI memory is configured as a portion from the memory (202) associated with the processor to support real time display of the information being fetched about the status of the signals. The LHMI memory can be configured to store only the binary value of the received signals.

Upon validation, the processor (203) configures predefined number of binary values from the binary value of the received signals to be displayed on the screen (206) Considering the above example, 20 binary values are stored in the LHMI memory. The processor (203) renders 5 binary values at a time for displaying on the first screen. Further, the processor (203) renders subsequent 5 binary values for displaying on the second screen. Likewise, the processor (203) renders a subsequent 5 binary values for displaying on each of a third screen and a fourth screen. The predefined number of binary values is rendered in a sequential manner such that the information is in the order. For example, the processor (203) renders the first 5 binary values from the 20 binary values for displaying on the first page and renders the subsequent 5 binary values for displaying on the second page. In an embodiment, the processor (203) can lock the predefined number of binary values in the LHMI memory before displaying on the screen (206), thereby not have the values updated during the display period. Locking the predefined number of binary values also enables sequential fetching of values from the LHMI memory. in an embodiment, the parameters of the electrical status signals can change during the time when the signal status is being viewed by the operator When the processor (203) has validated the value of the status signal and has stored the value of the status signal for displaying on the screen (206), the value of the status signal can be updated. In such scenario, the processor (203) configures the screen (206) to display the updated binary value without validating the updated value. In another embodiment, the processor (203) can validate the updated signal status value and then configure the validated signal status value to be displayed on the screen (206).

The updated binary value of the status signals is stored in the LHMI memory and replaces/ overwrites/ dumps the previously stored binary values. Storing the updated binary values enables displaying real -time data on the screen (206). For example, with reference to figure 3, consider that status of "AND1" is displayed as "OK" in a first screen and the user navigates further to see inputs to the "AIMD1". Consider a second screen displays the logic block "OR1" and a status "OK". As the user can require few seconds to view the second screen, the value at the input of the "AND1" can be updated and the processor (203) executes the application function (204) using the updated value which can result in failure of the breaker operation. Here, screen (206) can dynamically display the "AND1" logic block and its corresponding status "KO", thus indicating the user that the breaker is not enabled for operation. The real-time processing of the updated value of the received signals is given below. It should be noted that the status can change from "KO" to "OK" in an instance and "OK" to "KO" in another instance. Such real-time change in the status due to update in the value of the signal is displayed to the user.

Let us consider an example, where time taken for displaying the binary values of the received signals on the screen from an instance of receiving the signals takes Is. Let the execution of the application function (204) consume 2.5ms Further, let the updated binary value of the received signals is received at 0.9^th of the second. Thus, the processor (203) cannot validate (not executing the application function) the updated binary values before displaying on the LHMI (205) and store the updated binary values in the LHMI memory for displaying on the screen (206). If the updated binary values are received at 0.5^th of the second, the processor (203) executes the application function (205) and validates the updated binary values of the status of the signals. Further, validation of the updated binary values is configured for displaying on the screen (206). The predefined number of binary values from the binary values/ updated binary values of the received signals are rendered and are displayed on the screen (206). n an embodiment, the controls (207) enables the personnel to perform the operations. For example, the controls (207) can be a button in the IED to enable close function for the circuit breaker. Likewise, the controls (207) can include a button to bypass the control breaker. The controls (207) are used to provide inputs to the IED (101) for performing control and protection operations.

In an embodiment, the processor (203) performs a pre-operate check before enabling the controls (207) for the user to perform operations on the circuit breaker. The pre-operate check is an additional validation step to ensure that the breaker operation is enabled.

When the user opts to diagnose the failure of the breaker operation, the processor (203) processes the received signals and displays the exact cause of the unexpected outcome. The user can analyze the data displayed and can choose to operate the breaker. Before providing control inputs to operate the breaker, the user can choose to check if the status of the logical blocks has changed. Figure 6a shows a screen (206) displaying a message to the user that the breaker operation is enabled. Also, the screen (2.06) displays an option for performing pre-operate check. When the user selects/ opts to perform the pre-operate check, the processor (203) executes the application function (204) with real-time value of the received signals and displays the results of the validation.

Figure 6b-6f shows the screen (206) displaying the logical blocks and corresponding status. Upon performing the pre-operate check, the user can operate the circuit breaker or call for a maintenance. Thus, the pre-operate check can act as a fail-safe mechanism and provides added security.

Figure 7 illustrates method steps for displaying information in real-time on the screen

(206).

in an embodiment, the I/O interface (201) receives signals from the one or more measurement devices. The processor (203) fetches the signals from the I/O interface and process to obtain status of the signals. Values of the status signals are used for executing the application function (204) configured in the processor (203). n an embodiment, the processor (203) executes the application function (205) including the logical function of status of signals received from the one or more measurement devices.

In an embodiment, when the outcome of the execution of the application function (204) is different from expected outcome, the processor (203) validates the binary values of the status of the signals when the outcome of execution of the application function (205) is different from an expected outcome of execution of the application function (205). The validation is performed by comparing the binary value of the received signals with binary value of the corresponding reference signals. The binary values of the received signals are stored in the LHMi memory. in an embodiment, the processor (203) renders predefined number of binary values from the validated binary values of the received signals in the LHMI memory for displaying on the screen (206). The validated binary values of the received signals can be displayed using one page or multiple pages.

In an embodiment, the present disclosure discloses an IED for validating the binary value of the received signals. The validated binary value of the received signals is displayed on the LHMI (205) in real-time. The real-time values displayed on the LHMI (205) are used to enable operations of the one or more circuit breakers (104).

Claims

We claim:

1. An Intelligent Electronic Device (IED) for operating a circuit breaker electrically connected in a power distribution system comprising a plurality of electrical power distribution components, wherein the IED is configured to operate the circuit breaker based on processing of signals associated with electrical and physical parameters received from one or more measurement equipment connected in the power distribution system, and wherein the electrical and physical parameters are processed by the IED:

to determine status of signals for logically executing an application control function for enabling operation of the circuit breaker in the power distribution system, and

to validate the status of the signals as per the application function, the IED comprising: an input and output interface for receiving the signals from the one or more measurement equipment at predefined time intervals, wherein the signals are provided to a processor of the IED for determining a value of the status of the signals for performing computing and logical operations according to the application function;

a memory associated with the processor of the IED for storing data associated with the application function for execution by the processor of the IED, wherein the data associated with the application function comprises at least one of the value of status of the received signals and a value of status of reference signals;

a Local Human Machine interface (LHIVII) for displaying predefined number of values of the status of the received signals, wherein the predefined number of values of the status of the received signals displayed at any instant of time is less than the data stored in the memory; and

wherein the processor is configured to:

execute the application function using the value of the status of the received signal from the one or more measurement equipment and validate the value of the status of the received signal by comparing the value of the status of the received signal received with the value of status of corresponding reference signals, the value of status of at least one signal causing an outcome of the execution of the application function to be different from an expected output of execution of the application function; and

wherein the predefined number of the values of the status of received signals are configured to be displayed on the LHIVII, wherein upon receiving updated an value of the status of the received signals from the input output interface, the processor is configured to revalidate the updated value of the status of the received signals and wherein a predefined number of the updated values of the status of the received signals configured to be displayed, thereby enabling switching of the circuit breaker associated with the IED based on the outcome of the execution of application function.

2. The IED as claimed in claim 1, wherein the LHMI displays a value of status of at least one signal, wherein the value of the status of the at least one signal is identified different from the value of the status of corresponding reference signal.

3. The IED as claimed in claim 1, wherein the LHMI has predefined dimensions wherein the predefined dimensions are used for calculating the predefined number of values of the status of the received signals for displaying on the LHMI.

4. A method of enabling operations of a circuit breaker by an Intelligent Electronic Device (IED), wherein the IED and the circuit breaker are electrically connected in a power distribution system comprising a plurality of electrical power distribution components, wherein the IED is configured to operate the circuit breaker based on a processing of signals associated with electrical or physical parameters, received from one or more measurement equipment connected in the power distribution system to determine a status of the signals for enabling an operation in the power distribution system, and to validate the status of the signals as per an application function configured in the IED for switching of the circuit breaker, wherein the application function includes at least a logical function of the determined status of the signals, wherein the IED comprises an input output interface, a processor, a memory associated with the processor and a Local Human Machine Interface (LHMI) along with LHMI memory,

wherein the input output interface receives signals from the one or more measurement equipment at predefined time intervals, wherein the signals are provided to a processor of the IED for determining a value of the status of the received signals for performing computing and logical operations according to the application function,

wherein the memory stores data related to the application function for execution by the processor, wherein the data associated with the application function comprises at least one of the value of status of the received signals and a value of status of reference signals, wherein the LHMI displays predefined number of values of the status of the received signal, wherein the predefined number of values of the status of the received signals displayed at any instant of time is less than the data stored in the memory; and

wherein the processor is configured to perform the method comprising:

executing the application function using the value of the status of the received signal and validating the value of the status of the received signal by comparing with a value of status of corresponding reference signal, wherein the value of the status at least one signal cause the outcome of the e execution of the application function to be different from an expected output of execution of the application function; and displaying a predefined number of the values of the status of signal on the LHMI, wherein upon receiving an updated value of the status of the received signals from processing of the signals received from the input output interface, the processor is configured to revalidate the updated value of the status of the received signals and wherein a predefined number of the updated values of the status of the signal are configured to be displayed, thereby enabling switching of the circuit breaker associated with the IED based on the outcome of the execution of application function.

5. The method as claimed in claim 5, wherein comparing comprises identifying value of the status of at least one signal different from the value of the status of corresponding reference signal, wherein the value of the status of the at least one signal is configured for displaying on the LHMI, wherein the value of the status of the at least one signal is less than or equal to the predefined number of values of the status of the signals.

6. The method as claimed in claim 5, wherein the predefined number of values of the status of the at least one signal is configured to be displayed on the LHMI are calculated based on dimensions of a screen provided in the LHMI.

7. The method as claimed in claim 5, wherein the value of the status of the received signals are replaced with the updated value of the status of the received signals upon receiving the updated value of the status of the received signals from the input output interface.