Claims:1. A system (100) for pre-indication of overload condition in an air circuit breaker (102), the system comprising:
a first pin (102-1) of the air circuit breaker (102) operatively coupled to a first terminal of a first power supply (104);
one or more switches (106), wherein a first terminal of the one or more switches (106) is operatively coupled with a second terminal of the first power supply (104), and a second terminal of the one or more switches (106) is operatively coupled with a second pin (102-2) of the air circuit breaker (102);
one or more overload indication devices (108) operatively coupled to a third terminal of the one or more switches (106); and
an electronic trip unit (ETU) operatively coupled with the air circuit breaker (102) and the one or more switch (106), wherein the electronic trip unit ETU is configured to generate and provide a set of first signals (202) to the one or more switches (106), when a value of one or more electrical parameters associated with the first power supply exceeds threshold values, and
wherein the set of first signals (202) facilitate triggering of the one or more switches (106) to enable activation of the one or more overload indication devices (108).
2. The system (100) as claimed in claim 1, wherein the first pin and the second pin are connected, through at least one photo-transistors (204).
3. The system (100) as claimed in claim 2, wherein the electronic trip unit (ETU) is configured to turn ON the at least one photo-transistors (204), to enable generation of the set of first signals (202).
4. The system (100) as claimed in claim 1, wherein the one or more switches (106) comprise any or combination of relay, and double pole double throw switch (DPDT).
5. The system (100) as claimed in claim 1, the one or more overload indication devices (108) comprise any or combination of speaker, hooter, and a light emitting device (LED).
6. The system (100) as claimed in claim 1, wherein the system (102) comprises a second power supply (110) operatively coupled to the one or more overload indication devices (108), and configured to provide electrical power to the one or more overload indication devices (108).
7. The system (100) as claimed in claim 1, wherein the one or more electrical parameters comprise any or combination of current, voltage, frequency, and power.
, Description:TECHNICAL FIELD
[0001] The present disclosure relates to the field of air circuit breaker, and more particularly the present disclosure relates to overload protection contacts based pre-alarm system for air circuit breaker.

BACKGROUND OF THE INVENTION
[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] Trip units are used in the electrical distribution systems for protecting the electrical circuits and devices from any abnormality associated with the input power supply. Trip units can include an air circuit breaker and protection relays. An electronic trip unit can be used to track/monitor electrical parameter associated with the input power supply. The trip units can protect the devices connected to the input power supply from different abnormalities in the input supply, such as overload condition, underload condition, short circuit, surge and fluctuations. Generally, the trip units include events that can include healthy, alarm, pickup, and trip, representing different conditions of the input power supply.
[0004] These events can be recorded in the memory of the trip units for taking further actions. Whenever there is pickup event (input current is more than threshold), the trip unit can raise pre-alarm indicating the event to the user, and then can enter the pickup even. In response to the pre-alarm, the user can check the health of the electrical system and can take necessary steps to avoid any breakdown. However, the alarm system is limited only to the trip units only, and a person has to be physically present all the time at the site of the trip unit to observe the different event of the trip unit.
[0005] There is, therefore, a requirement to have a trip unit which can send the indication of different conditions of the input supply and fault conditions to a remote user.
OBJECTS OF THE PRESENT DISCLOSURE
[0006] It is an object of the present disclosure to provide a system for indication of overload condition in the air circuit breaker.
[0007] It is an object of the present disclosure to provide a system for sending remotely an indication of overload condition in the air circuit breaker.
[0008] It is an object of the present disclosure to provide a system for sending pre-alarm indicating an overload condition in the air circuit breaker which can helps in load management.

SUMMARY
[0009] The present disclosure relates to the field of air circuit breaker, and more particularly the present disclosure relates to overload protection contacts based pre-alarm system for air circuit breaker.
[0010] An aspect of the present disclosure relates to a system for advance indication of overload condition in an air circuit breaker. The system includes a first pin of the air circuit breaker operatively coupled to a first terminal of a first power supply. One or more switches including a first terminal and a second terminal. The first terminal is operatively coupled with a second terminal of the first power supply, and the second terminal of the one or more switches is operatively coupled with a second pin of the air circuit breaker; one or more overload indication devices operatively coupled to a third terminal of the one or more switches. An electronic trip unit (ETU) operatively coupled with the air circuit breaker and the one or more switch. The electronic trip unit (ETU) is configured to generate and provide a set of first signals to the one or more switches, when a value of one or more electrical parameters associated with the first power supply exceeds threshold values. The set of first signals facilitate triggering of the one or more switches to enable activation of the one or more overload indication devices.
[0011] In an aspect, the first pin and the second pin may be connected, through at least one photo-transistors.
[0012] In an aspect, the electronic trip unit (ETU) may be configured to turn ON the at least one photo-transistors to enable generation of the set of first signals.
[0013] In an aspect, the one or more switches may include any or combination of relay, and double pole double throw switch (DPDT).
[0014] In an aspect, the one or more overload indication devices may include any or combination of speaker, hooter, and a light emitting device (LED).
[0015] In an aspect, the system may include a second power supply operatively coupled to the one or more overload indication devices, and may be configured to provide electrical power to the one or more overload indication devices.
[0016] In an aspect, the one or more electrical parameters may include any or combination of current, voltage, frequency, and power.
[0017] 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
[0018] 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.
[0019] FIG. 1 illustrates an exemplary diagram of a system for indicating overload condition in an air circuit breaker, according to an embodiment of present disclosure.
[0020] FIG. 2 illustrates an exemplary representation of internal connection of pins of the air circuit breaker, according to an embodiment of present disclosure.
[0021] FIG. 3 illustrates an exemplary firmware flowchart, according to an embodiment of present disclosure.

DETAILED DESCRIPTION
[0022] 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 spirit and scope of the present disclosure as defined by the appended claims.
[0023] 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.
[0024] 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.
[0025] The present disclosure relates to the field of air circuit breaker, and more particularly the present disclosure relates to overload protection contacts based pre-alarm system for air circuit breaker.
[0026] In an embodiment the present disclosure elaborated upon a system for advance indication of overload condition in an air circuit breaker. The system includes a first pin of the air circuit breaker operatively coupled to a first terminal of a first power supply. One or more switches including a first terminal and a second terminal. The first terminal is operatively coupled with a second terminal of the first power supply, and the second terminal of the one or more switches is operatively coupled with a second pin of the air circuit breaker; one or more overload indication devices operatively coupled to a third terminal of the one or more switches. An electronic trip unit (ETU) operatively coupled with the air circuit breaker and the one or more switch. The electronic trip unit (ETU) is configured to generate and provide a set of first signals to the one or more switches, when a value of one or more electrical parameters associated with the first power supply exceeds threshold values. The set of first signals facilitate triggering of the one or more switches to enable activation of the one or more overload indication devices.
[0027] In an embodiment, the first pin and the second pin can be connected, through at least one photo-transistors.
[0028] In an embodiment, the electronic trip unit (ETU) can be configured to turn ON the at least one photo-transistors to enable generation of the set of first signals.
[0029] In an embodiment, the one or more switches can include any or combination of relay, and double pole double throw switch (DPDT).
[0030] In an embodiment, the one or more overload indication devices can include any or combination of speaker, hooter, and a light emitting device (LED).
[0031] In an embodiment, the system can include a second power supply operatively coupled to the one or more overload indication devices, and can be configured to provide electrical power to the one or more overload indication devices.
[0032] In an embodiment, the one or more electrical parameters can include any or combination of current, voltage, frequency, and power.
[0033] FIG. 1 illustrates an exemplary diagram of a system for indicating overload condition in an air circuit breaker, according to an embodiment of present disclosure.
[0034] FIG. 2 illustrates an exemplary representation of internal connection of pins of the air circuit breaker, according to an embodiment of present disclosure.
[0035] As illustrated, the proposed system 100 can include an air circuit breaker 102, one or more switches 106, and one or more overload indication devices 108. The one or more switches 106 can include but without limiting to a double pole double throw switch (DPDT), and a relay. The one or more overload indication devices 108 can be, but without limiting to a sound alarm (e.g. speaker, hooter), and a light emitting diode. A first pin 102-1 of the air circuit breaker 102 can be operatively coupled to a first terminal of a power supply 104 (also referred as first power supply 104, herein). Switches 106 having a first terminal operatively coupled with a second terminal of the first power supply 104, and a second terminal operatively coupled with a second pin of the air circuit breaker 102.
[0036] In an embodiment, the overload indication devices 108 can be operatively coupled to a third terminal of the switches 106. An electronic trip unit ETU (not shown) can be operatively coupled with the air circuit breaker 102 and the switch 106. The electronic trip unit (ETU) can be configured to generate and provide a set of first signals to the switches 106, when a value of one or more electrical parameters associated with the power supply 104 exceeds threshold values. The set of first signals can facilitate triggering of the switches 106 to enable activation of the overload indication devices 108. The system 100 can include another power supply 110 (also referred as second power supply 110, herein) that can be used to provide power supply to the overload indication devices.
[0037] In an embodiment, threshold values corresponding to the electrical parameters cab be stored in the electronic trip unit which can be used for the comparison with the electrical parameters of the power supply. The one or more electrical parameters can include but not limited to current, voltage, frequency, and power. When the value of electrical parameters exceeds the corresponding threshold values stored in the electronic trip unit, the electronic trip unit can send a set of first signals to the switches 106 that further can facilitate the activation of the overload indication devices. Table 1 shows an exemplary procedure to configure pre-trip alarm for overload.

Table: 1
As shown, the either of current and voltage protection to be selected can be detected. After detecting one of the current and voltage protections, type of protection is selected depending upon the type of event (e.g. overload, short circuit etc.). After detecting the type of protection, the alarm can be raised.
[0038] The system 100 can be operatively coupled with one or more mobile computing devices associated with one or more users, through a network. The system 100 can be implemented using any or a combination of hardware components and software components such as a server, a computing system, a computing device, a security device and the like. The activation of the load indication devices 10 can be indicated on the one or more mobile computing devices associated with the user. In response to the activation of indication devices, required load shedding can be performed automatically or manually using the one or more mobile computing devices.
[0039] In an embodiment, the first pin 102-1 and the second pin 102-2 of the air circuit breaker 102 can be internally connected using at least one photo-transistors 204. A pin of the air circuit breaker 102 can be connected to the electronic circuit breaker 102. The electronic circuit breaker (ETU) can sent a signal to the air circuit breaker for facilitating the activation of the overload indication devices. The electronic trip unit (ETU) can be configured to turn ON the at least one photo-transistors 204 to enable generation of the set of first signals.
[0040] FIG. 3 illustrates an exemplary firmware flowchart, according to an embodiment of present disclosure.
[0041] As illustrated, at step 302, initially all modules and peripherals can be initialized with inbuilt opto-coupler (also referred as phototransistor 204, herein) and controller area network (CAN) communication and analog to digital (ADC) for 3 phase input currents and voltages reading purpose. At step 304, different protection reading that can include the threshold values for the electrical parameters can be read. At step 306, Scheduler can start execution of the tasks on the basis of priority. At step 308, the system can be configured with the protection settings. At step 309, the ADC can be initialized for reading current and voltage analog signals, process the current and voltages samples per cycle’s, and to send it to display module for metering purpose via CAN communication (step 314). At step 316, an electronic trip unit can read alarm threshold level and continuously compare with incoming current and voltage values for giving Alarm and Trip in action. At step 318, if the input current and voltage values are greater than threshold level, then it can operate the opto-coupler to drive the alarm or Breaker configured as load (step 320).
[0042] 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
[0043] The proposed invention provides a system for indication of overload condition in the air circuit breaker.
[0044] The proposed invention provides a system for sending remotely an indication of overload condition in the air circuit breaker.
[0045] The proposed invention provides a system for sending pre-alarm indicating an overload condition in the air circuit breaker which can helps in load management.