Claims:1. A system for indicating internal fault in an electronic trip unit of a circuit breaker, said system comprising:
a controller to detect a fault in said electronic trip unit, and generate a signal based thereon,
a display unit that receives the signal from the said controller; and
a wired channel for communication between the electronic trip unit and the display unit, wherein the display unit displays information based on the signal received from the controller.
2. The system as claimed in claim 1, wherein the display unit displays information pertaining to any one or combination of current metering, circuit state and circuit breaker status, when controller detects healthy communication between electronic trip unit and said display unit.
3. The system as claimed in claim 2, wherein the display unit displays an error message, when controller detects a failed communication between electronic trip unit and said display unit.
4. The system as claimed in claim 1, wherein the display unit further comprises an LED indication module and an alarm indication module.
5. The system as claimed in claim 1, wherein the electronic trip unit and the display unit communicate via a controller area network (CAN) channel.
6. A method for indicating internal fault in an electronic trip unit of a circuit breaker, said method comprising steps of:
connecting the electronic trip unit and a display module through a wired protocol,
detecting health of the communication between said electronic trip unit and the said display module and generating a signal based thereon; and
displaying information on the display module based on the signal generated.
7. The method as claimed in claim 6, wherein information pertaining to any one or combination of current metering, circuit state and circuit breaker status is displayed, when a healthy communication between said electronic trip unit and said display module is detected.
8. The method as claimed in claim 6, wherein an error message is displayed in case of a communication breakdown between said electronic trip unit and said display module is detected.
9. The method as claimed in claim 8, wherein an additional message is displayed, to repair or replace the said electronic trip unit.
, Description:TECHNICAL FIELD
[0001] The present invention relates generally to the field of protection devices for electrical circuits to protect the components of the circuit from current overload due to abnormal conditions like a short-circuit. In particular, the present invention relates to an error indication system and method for an electronic trip unit of a circuit breaker.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] A trip unit is the part of a circuit breaker that opens the circuit in the event of a thermal overload, short circuit or ground fault. An open circuit will not conduct electricity because either air, or some other insulator has stopped or broken the flow of current in the loop. There are two types of trip units, electromechanical (also called thermal magnetic) and electronic.
[0004] An electromechanical trip unit has moving parts - it combines a current-sensitive electromechanical device with a thermal-sensitive device and the two devices work together to determine when to mechanically open the circuit.
[0005] An electronic trip unit is programmable device which measures and times current flowing through the circuit breaker and initiates a trip signal when appropriate. Electronic trip units are devices which guarantee a system of protection based on microprocessor electronics. In comparison with thermomagnetic trip units, electronic trip units allow a more precise setting both in terms of trip times as well as in terms of current thresholds in order to better meet installation requirements.
[0006] Unite States patent application 2008/0100140 discloses a power management and monitoring system for controlling an electrical device powered by a power supply. Here, an electronic circuit breaker (ECB) monitors and manages power to the electrical device and a switch connected to the ECB is capable of remotely bypassing the ECB. The system also includes a display and controller that can remotely monitor and control the electrical device by remotely actuating the ECB.
[0007] United States patent application 2007/0103835 discloses a power management control and monitoring system and integrated remotely actuated circuit breaker actuator apparatus that provides a greatly simplified power management control and monitoring system.
[0008] United States patent 6215263 discloses a motor operator for an overhead power switch which includes a microcontroller, an array of sensors, a motor and drive coupled to a switch actuator and responsive to the microcontroller, and a sophisticated program algorithm stored in memory at the actuator site for dynamically controlling the various control modes as called for by changing conditions.
[0009] United States patent application 2014/0266755 discloses a monitoring system for a heating, ventilation, and air conditioning (HVAC) system which includes a monitoring device, a monitoring server located remotely and a review server. The monitoring device measures an aggregate current supplied to components of the HVAC system and transmits current data based on the measured aggregate current. The monitoring server receives the transmitted current data and, based on the received current data, assesses whether failures have occurred in first and second components of the HVAC components.
[0010] United States patent 6262871 discloses an electronic test circuit for automatic self-testing of fault detection devices such as GFCI's, AFCI's and RCD's. This self-test device tests the functioning of the primary circuit breaker and detects failure modes such as welded contacts in the circuit breaker.
[0011] The prior art described above describe remote control of various electrical components and systems and also disclose detection of faults in some electric components like circuit breakers. However, the prior art described above do not cover the continuous monitoring of the health of an electronic trip unit of a circuit breaker and an indication of error in case of a fault in the electronic trip unit by displaying an error message, as well as by LED and alarm indication.
[0012] There is, therefore, a requirement in the art for a system and method that continuously motors the health of the electronic trip unit of a circuit breaker and indicates an error in case of an internal fault in the electronic trip circuit.
[0013] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[0014] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about”. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[0015] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0016] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0017] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

OBJECTS OF THE INVENTION
[0018] A general object of the present invention is to provide a system and method for monitoring health of the electronic trip unit of a circuit breaker.
[0019] Another object of the present invention is to provide a system and method for utilizing communication status between electronic trip unit and display unit to assess the health of the said electronic trip unit.
[0020] Another object of the present invention is to provide a system and method for displaying an error message in case of a fault in the electronic trip unit.
[0021] Another object of the present invention is to provide a system and method for additional LED indication and alarm unit to aid in quick recognition of a fault in the electronic trip unit.
[0022] Another object of the present invention is to provide a system and method for suggesting repairing or replacing the faulty electronic trip unit.

SUMMARY
[0023] The present invention relates generally to the field of protection devices for electrical circuits to protect the components of the circuit from current overload due to abnormal conditions like a short-circuit. In particular, the present invention relates to an error indication system and method for an electronic trip unit of a circuit breaker.
[0024] In an aspect of the present invention, a system is disclosed for indicating a fault in an electronic trip unit of a circuit breaker, wherein the system comprises a controller configured to detect a fault in the electronic trip unit and to generate a signal thereon, a display unit configured to receive the signal from the controller and a wired channel for communication between the electronic trip unit and the display unit.
[0025] In another aspect of the present invention, the display unit displays information based on the signal it receives from the controller.
[0026] In another aspect of the present invention the wired communication protocol between the electronic trip unit and the display unit is a controller area network (CAN) channel.
[0027] In another aspect of the present invention, the display unit displays information pertaining to any one or combination of current metering, circuit state and circuit breaker status, when controller detects healthy communication between electronic trip unit and said display unit.
[0028] In another aspect of the present invention, in case the controller detects a failure in communication between the electronic trip unit and the display unit, the said display unit displays an error message.
[0029] In another aspect of the present invention, the display unit further comprises an LED indication unit and an alarm unit, for easy recognition of a fault message.
[0030] In another aspect of the present invention, a method is also disclosed for indicating a fault in an electronic trip unit of a circuit breaker, wherein the method includes the steps of: connecting the electronic trip unit and a display module through a wired protocol; detecting health of the communication between said electronic trip unit and the said display module and generating a signal based thereon; and displaying information on the display module based on the signal generated.
[0031] In another aspect of the present invention, the method includes steps of displaying information pertaining to any one or combination of current metering, circuit state and circuit breaker status, when a healthy communication between said electronic trip unit and said display module is detected.
[0032] In another aspect of the present invention, the method further includes the steps of displaying an error message in case a communication breakdown between said electronic trip unit and said display module is detected.
[0033] In another aspect of the present invention, the method disclosed further includes the steps of displaying an additional message to suggest repairing or replacing the faulty electronic trip unit.
[0034] In contrast to the prior art considered, the present invention provides a system and method that continuously monitors the health of an electronic trip unit of a circuit breaker by considering the state of communication between the electronic trip unit and the display unit as a metric of health of the electronic trip unit. Further, in case of a failure in the electronic trip unit, an error message and an LED and alarm indication are issued by the display unit, as intimation.
[0035] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF DRAWINGS
[0036] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure, and wherein:
[0037] FIG. 1 illustrates an exemplary representation of various modules of a system for indicating the health of an electronic trip unit of a circuit breaker.
[0038] FIG. 2 illustrates an exemplary flow diagram of a method for indicating the health of an electronic trip unit of a circuit breaker.

DETAILED DESCRIPTION
[0039] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[0040] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[0041] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0042] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. These exemplary embodiments are provided only for illustrative purposes and so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. The invention disclosed may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
[0043] Various modifications will be readily apparent to persons skilled in the art. The general principles defined herein may be applied to other embodiments and applications without departing from the scope of the invention. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting. Thus, the present invention is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the invention have not been described in detail so as not to unnecessarily obscure the present invention.
[0044] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0045] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0046] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0047] Embodiments explained herein generally relate to the field of protection devices for electrical circuits to protect the components of the circuit from current overload due to abnormal conditions like a short-circuit. In particular, the present invention relates to an error indication system and method for an electronic trip unit of a circuit breaker.
[0048] In an aspect of the present invention, a system is disclosed for indicating a fault in an electronic trip unit of a circuit breaker, wherein the system comprises a controller configured to detect a fault in the electronic trip unit and to generate a signal thereon, a display unit configured to receive the signal from the controller and a wired channel for communication between the electronic trip unit and the display unit.
[0049] In another aspect of the present invention, the display unit displays information based on the signal it receives from the controller.
[0050] In another aspect of the present invention the wired communication protocol between the electronic trip unit and the display unit is a controller area network (CAN) channel.
[0051] In another aspect of the present invention, the display unit displays information pertaining to any one or combination of current metering, circuit state and circuit breaker status, when controller detects healthy communication between electronic trip unit and said display unit.
[0052] In another aspect of the present invention, in case the controller detects a failure in communication between the electronic trip unit and the display unit, the said display unit displays an error message.
[0053] In another aspect of the present invention, the display unit further comprises an LED indication unit and an alarm unit, for easy recognition of a fault message.
[0054] In another aspect of the present invention, a method is also disclosed for indicating a fault in an electronic trip unit of a circuit breaker, wherein the method includes the steps of: connecting the electronic trip unit and a display module through a wired protocol; detecting health of the communication between said electronic trip unit and the said display module and generating a signal based thereon; and displaying information on the display module based on the signal generated.
[0055] In another aspect of the present invention, the method includes steps of displaying information pertaining to any one or combination of current metering, circuit state and circuit breaker status, when a healthy communication between said electronic trip unit and said display module is detected.
[0056] In another aspect of the present invention, the method further includes the steps of displaying an error message in case a communication breakdown between said electronic trip unit and said display module is detected.
[0057] In another aspect of the present invention, the method disclosed further includes the steps of displaying an additional message to suggest repairing or replacing the faulty electronic trip unit.
[0058] FIG. 1 illustrates an exemplary representation of various modules of a system 100 for indicating the health of a smart electronics trip unit (SETU) 106, wherein the system 100 consists of a display module 108 that communicates with the SETU 106 through a controller area network (CAN) medium or channel 104. The display module 108 further consists of an LED indication module 110 and an alarm indication module 112, wherein the health of the SETU 106 is indicated by display module 108.
[0059] In an aspect of the present invention, the power input to the SETU 106 is provided by a 3-phase current supply 102 through a current transformer, wherein the SETU 106 is a tripping device that breaks the circuit in the event of abnormal current conditions such as short circuit, current overload etc. Through the CAN channel 104, the SETU 106 communicates to the display module 108, which in turn, provides information on cause of trip and current state of the circuit through the LED indication module 110 and alarm indication module 112.
[0060] In another aspect of the present invention, SETU 106 also meters the current being fed into the system 100 from the 3-phase supply 102, and this information is fed to the display module 108.
[0061] In another aspect of the present invention, SETU 106 monitors the current and voltage conditions of circuit elements like bus bars and issues a trip command to break the circuit when it detects an abnormal condition.
[0062] In an embodiment of the present invention, during an abnormal event in a circuit, the SETU 106 detects the anomaly and issues a trip command to the circuit breaker to break the said circuit. Through the CAN channel 104, SETU 106 communicates the information about the fault and that is indicated at the display module 108, by both LED indication module 110 and alarm indication module 112.
[0063] In an instance, if the SETU 106 should encounter a problem or cease to function properly, a circuit anomaly could go undetected, causing a failure in issuing a trip command and subsequent failure to break the said circuit. In case of overcurrent due to a fault, the circuit components risk getting damaged.
[0064] In an aspect of the present invention, a system 100 and method 200 is described that monitors the health of the SETU 106 and provides a warning or alarm if the SETU 106 has ceased to function in the required manner.
[0065] In another aspect of the present invention, the SETU 106 and display module 108 communicate via CAN channel 104. Metering of current from the 3-phase supply 102, current state of the circuit breaker, current state of the circuit, fault information etc. are some of the communication that the SETU 106 passes on to the display module 108.
[0066] In another embodiment of the present invention, the state of communication between SETU 106 and display module 108 is considered as a metric to assess the health of SETU 106. Should SETU 106 fail or cease to properly function, its communication through the CAN channel 104 with the display module 108 is interrupted.
[0067] In another embodiment, the firmware logic implemented in this invention interprets the interrupted communication of SETU 106 with the display unit 108 to be a sign that SETU 106 has failed.
[0068] In another embodiment, the display module 108 displays an error message indicating lack of communication with SETU 106 in the event of communication failure, as elaborated above.
[0069] FIG. 2 illustrates an exemplary flow diagram of a method 200 for indicating the health of a smart electronics trip unit (SETU) 106, wherein said method 200 comprises the following steps: to power on the SETU 106, to initialize the SETU 106 and display module 108, to connect SETU 106 and display module 108 via CAN channel 104, to perform a check for communication and; to indicate health of SETU 106 based on the check performed.
[0070] In an aspect of the present invention, once power is fed to the SETU 106 from the 3-phase supply 102, in step 202 the SETU 106 and display module 108 are initialized. Implicitly, LED indication module 110 and alarm indication module 112 are also initialized.
[0071] In another aspect of the present invention, a scheduler begins to execute the system tasks with priority.
[0072] In another aspect of the present invention, at step 204, the SETU 106 and display module 108 are connected through a wired protocol so as to establish communication between them.
[0073] In an embodiment of the present invention, at step 204, the wired protocol is a CAN channel 104.
[0074] In another aspect of the present invention, at step 206, it is checked if communication between SETU 106 and display module 108 exists and is healthy.
[0075] In another embodiment of the present invention, at step 206, a microcontroller can be programmed to perform a check of the communication.
[0076] In another aspect of the present invention, if the check in step 206 returns a positive feedback, that is, if communication between SETU 106 and display module 108 is healthy, the method 200 proceeds to step 208, wherein the system 100 continues to operate as usual and SETU 106 continues to transmit information on current metering, current state of circuit breaker, current state of circuit etc. to the display module 108.
[0077] In another aspect of the present invention, if the check in step 206 returns a negative feedback, that is, if communication between SETU 106 and display module 108 has failed, the method 200 proceeds to step 210, wherein a command is issued to the display module 108 to display an error message indicating failure of communication between SETU 106 and display module 108.
[0078] In another aspect of the present invention, after step 210, at step 212, the error message is also indicated by the LED indication module 110 and alarm indication module 112.
[0079] In another embodiment of the present invention, an additional message to repair or replace SETU 106 can also be displayed by the display module 108.
[0080] In another aspect of the present invention, the method 200 is continuously executed.
[0081] Without departing from the spirit and concept of the present invention, any variations and modifications to the embodiments should be within the apprehension of those with ordinary knowledge and skills in the art, and therefore fall in the scope of the present invention which is defined by the accompanied claims. Though the present invention has been described on the basis of some preferred embodiments, those skilled in the art should appreciate that those embodiments should by no means limit the scope of the present invention. Without departing from the spirit and concept of the present invention, any variations and modifications to the embodiments should be within the apprehension of those with ordinary knowledge and skills in the art, and therefore fall in the scope of the present invention which is defined by the accompanied claims.
[0082] The present invention is a system and method to detect failure in an electronic trip unit of a circuit breaker that is susceptible of modifications or variations all within the scope of the inventive concept as defined by the appended claims; any details may be replaced with technically equivalent elements. One or more of the elements above described may be differently shaped and/or positioned, can be differently coupled or positioned, etcetera. The materials, so long as they are compatible with the specific use, as well as the individual components, may be any according to the requirements and the state of the art.
[0083] Only certain features of the invention have been specifically illustrated and described herein, and many modifications and changes will occur to those skilled in the art. The invention is not restricted by the preferred embodiment described herein in the description. It is to be noted that the invention is explained by way of exemplary embodiment and is neither exhaustive nor limiting. Certain aspects of the invention that not been elaborated herein in the description are well understood by one skilled in the art. Also, the terms relating to singular form used herein in the description also include its plurality and vice versa, wherever applicable. Any relevant modification or variation, which is not described specifically in the specification are in fact to be construed of being well within the scope of the invention. The appended claims are intended to cover all such modifications and changes which fall within the spirit of the invention.
[0084] The foregoing description of the specific embodiments will so fully reveal the general nature of the invention that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
[0085] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refer to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the appended claims.
[0086] While embodiments of the present disclosure have been illustrated and described, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the scope of the disclosure, as described in the claims.
[0087] In the description of the present specification, reference to the term "one embodiment," "an embodiments", "an example", "an instance", or "some examples" and the description is meant in connection with the embodiment or example described, the particular feature, structure, material, or characteristic included in the present invention, at least one embodiment or example. In the present specification, the term of the above schematic representation is not necessarily for the same embodiment or example. Furthermore, the particular features structures, materials, or characteristics described in any one or more embodiments or examples in proper manner. Moreover, those skilled in the art can be described in the specification of different embodiments or examples are joined and combinations thereof.
[0088] All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
[0089] Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
[0090] The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
[0091] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0092] The present invention provides a system and method for monitoring health of the electronic trip unit of a circuit breaker.
[0093] The present invention provides a system and method for utilizing communication status between electronic trip unit and display unit to assess the health of the said electronic trip unit.
[0094] The present invention provides a system and method for displaying an error message in case of a fault in the electronic trip unit.
[0095] The present invention provides a system and method for additional LED indication and alarm unit to aid in quick recognition of a fault in the electronic trip unit.
[0096] The present invention provides a system and method for suggesting repairing or replacing the faulty electronic trip unit.