Description:CLOSING AND TRIPPING TEST JIG
TECHNICAL FIELD
[0001] The present disclosure relates to automated testing systems and, in particular, to a closing and tripping test jig. 5
BACKGROUND
[0002] Background description includes information that may be useful in understanding the present subject matter. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed subject 10 matter, or that any publication specifically or implicitly referenced is prior art.
[0003] Sometimes, excessive voltage or current is applied across service lines that deliver power to residences and commercial and institutional facilities. Such excess voltage or current spikes (transient overvoltages and surge currents) may result from switching of power supply, say, from one power grid to another power grid. 15 These events of excess voltage or current spikes may be of particular concern in power distribution centers of residential and commercial facilities, where downtime of equipment damage caused by overvoltages and/or current surges may be very costly.
[0004] Typically, sensitive electronic equipment may be protected against 20 transient overvoltages and surge currents using Surge Protective Devices (SPDs). For example, an SPD may be installed at a power input of electronic equipment to be protected against overcurrents. The typical failure mode of an SPD is a short circuit. The overcurrent protection typically employed is a combination of an internal thermal disconnector to protect the electronic equipment from overheating due to increased 25 leakage currents and an external fuse to protect the electronic equipment from higher fault currents. Different SPD technologies may avoid the use of the internal thermal
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disconnector because, in the event of failure, they change their operation mode to low ohmic resistance. In this manner, the electronic equipment can withstand significant short circuit currents. In this regard, there may be no operational need for an internal thermal disconnector. Further to the above, some embodiments that exhibit even higher short circuit withstand capabilities may also be protected only by the main 5 circuit breaker of the installation without the need for a dedicated branch fuse.
[0005] However, especially in high power systems, during overvoltages and surge currents, the fault current could be limited to a lower level than the current threshold required for the main circuit breaker to trip fast enough. Faster response times may be required to avoid damages and/or risk. 10
[0006] One solution employed by many manufacturers includes an electronic system to force the external tripping of the circuit breaker. An electronic circuit may use pressure and/or optical sensors to detect the presence of overvoltages and surge currents and trip the circuit breaker. Other more recent techniques use readings of the voltage and current of the power system and trip the circuit breaker when specific 15 patterns of these readings are encountered.
[0007] However, the time that a circuit breaker may take to disconnect the system form the power source (after being externally tripped by the electronic circuit) may be in the order of 100 milliseconds or more. During this time, a short circuit current that may be in a range of about 10 k amperes to about 100 k amperes may cause damage 20 to the internal portions of the electronic equipment as well as expose proximate personnel to a significant danger.
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OBJECTS OF THE DISCLOSURE
[0008] Some of the objects of the present disclosure, which at least one embodiment herein satisfy, are listed hereinbelow.
[0009] An object of the present disclosure is to provide a closing and tripping test jig. 5
[0010] Another object of the present disclosure is to provide closing and tripping test jig for vacuum circuit breaker, minimum oil circuit breaker, and vacuum interrupter.
[0011] These and other objects and advantages of the present disclosure will be apparent to those skilled in the art after a consideration of the following detailed 10 description taken in conjunction with the accompanying drawings in which a preferred form of the present disclosure is illustrated.
SUMMARY
[0012] This summary is provided to introduce concepts related to a closing and 15 tripping test jig. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0013] The present disclosure relates to a closing and tripping test jig. The system 20 includes a main power input module; two input-side capacitors along with a resistor connected in series with the main power input module to control the flow of current from the main power input module; a bridge rectifier connected in parallel with a center point of the two capacitors and one line of the main power input module; and one or more output-side capacitors connected to output ends of the bridge rectifier. 25
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[0014] In an aspect, a relay is connected in parallel with the one or more output-side capacitors connected to the output ends of the bridge rectifier.
[0015] In an aspect, output ends of the relay are connected to a closing coil and a tripping coil via respective push buttons.
[0016] In an aspect, the output ends of the relay are coupled with a ready 5 indication lamp. The ready indication lamp is configured to indicate a buildup of direct current (DC) of 110 V based on which the respective push buttons are activated or deactivated.
[0017] In an aspect, the main power input module supplies alternating current (AC) ranging from 220 V to 250 V. 10
[0018] In an aspect, each of the two input-side capacitors has a capacitance of 5 Micro Farad (µF) and output alternating current (AC) up to 250 V.
[0019] In an aspect, the resistor has a 300 OHM resistance.
[0020] In an aspect, each of the one or more output-side capacitors has a capacitance of 5600 Micro Farad (µF) and output direct current (DC) up to 150 V. 15
[0021] In an aspect, a number of the one or more output-side capacitors is selected based on the requirement of the output voltage.
[0022] In an aspect, the main power input module is coupled with a main-on indication lamp, the main-on indication lamp being configured to indicate supply voltage of alternating current (AC) from the main power input module. 20
[0023] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.
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BRIEF DESCRIPTION OF DRAWINGS
[0024] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that 5 are consistent with the subject matter as claimed herein, wherein:
[0025] FIG. 1 illustrates a circuit block diagram of a test jig in accordance with an embodiment of the present disclosure.
[0026] The figure depicts embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the 10 following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION 15
[0027] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the 20 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.
[0028] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and 25 embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
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[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “includes” and/or “including,” 5 when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
[0030] It should also be noted that in some alternative implementations, the 10 functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
[0031] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of 15 ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 20
[0032] Embodiments and/or implementations described herein have a main aim of providing a circuit which can produce high current capacity 110v DC from 220v AC without using any bulky transformer to keep a test jig handy, portable and easy to use for testing Vacuum Circuit Barker used in distribution of high voltage system. In an aspect, the test jig can be implemented for vacuum circuit breaker, minimum oil 25 circuit breaker, and vacuum interrupter.
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[0033] FIG. 1 illustrates a test jig (100) in accordance with an embodiment of the present disclosure. The test jig (100) includes a main power input module (102). The main power input module (102) can be a miniature circuit breaker, a vacuum circuit breaker, a minimum oil circuit breaker, a vacuum interrupter, and the like. The main power input module is capable of receiving power from multiple sources and 5 supplying alternating current (AC) ranging from 220 V to 250 V.
[0034] Output ends of the main power input module (102) are coupled with a main-on indication lamp (104). The main-on indication lamp (104) is configured to indicate the supply voltage of alternating current (AC) from the main power input module (102). 10
[0035] The output ends of the main power input module (102) are further connected in series with two input-side capacitors (106) and a resistor (108). The input-side capacitors (106) and a resistor (108) are provided to control the flow of current from the main power input module (102). For such controlling, each of the two input-side capacitors (106) has a capacitance of 5 Micro Farad (µF) and output of 15 alternating current (AC) up to 250 V, while the resistor has a 300 OHM resistance.
[0036] Further, a bridge rectifier (110) is connected in parallel with a center point of the two input-side capacitors (106) and is connected with one line of the main power input module (102). As can be appreciated by those skilled in the art, the bridge rectifier (110) is a device for converting the alternating current (AC) electricity 20 into a direct current (DC) electricity.
[0037] Output ends of the bridge rectifier (110) are connected to one or more output-side capacitors (112). In an aspect, each of the one or more output-side capacitors (112) has a capacitance of 5600 Micro Farad (µF) and output of direct current (DC) up to 150 V. Also, the number of the one or more output-side capacitors 25 (112) can be selected based on the requirement of the output voltage.
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[0038] Further, a relay (114) is connected in parallel with the one or more output-side capacitors (112) connected to the output ends of the bridge rectifier (110). Output ends of the relay (114) are coupled with a ready indication lamp (116). The ready indication lamp (116) is configured to indicate buildup of direct current (DC) of 110 V. Based on the indication by the ready indication lamp (116), a closing coil 5 (118) and a tripping coil (120) connected to the output ends of the relay (114) are activated or deactivated via respective close push button (122) and open push button (124).
[0039] In an aspect, the closing coil (118) and the tripping coil (120) can be activated or deactivated through a remote selector (closing/tripping) switch (126) 10 from a remote location.
[0040] Thus, with the implementation of the present disclosure, the test jig (100) ensures that the power received at 250 V at the main power module (102) is safely converted to a required output voltage of 110 V before being supplied to electronic equipment which is to be protected from overvoltages and current surges. 15
[0001] Furthermore, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, 20 modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.
[0002] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and 25 substantial equivalents of the embodiments and teachings disclosed herein, including
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those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.
[0003] 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 5 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.

Claims:I/We claim:
1. A test jig (100) comprising:
a main power input module (102);
two input-side capacitors (106) along with a resistor (108) connected in series with the main power input module (102) to control the flow of current from the main 5 power input module (102);
a bridge rectifier (110) connected in parallel with a center point of the two input-side capacitors (106) and one line of the main power input module (102); and
one or more output-side capacitors (112) connected to output ends of the bridge rectifier (110). 10
2. The test jig (100) as claimed in claim 1, wherein a relay (114) is connected in parallel with the one or more output-side capacitors (112) connected to the output ends of the bridge rectifier (110).
3. The test jig (100) as claimed in claim 2, wherein output ends of the relay (114) are connected to a closing coil (118) and a tripping coil (120) via respective push buttons 15 (122, 124).
4. The test jig (100) as claimed in claim 3, wherein the output ends of relay (114) are coupled with a ready indication lamp (116), the ready indication lamp (116) being configured to indicate buildup of direct current (DC) of 110 V based on which the respective push buttons (122, 124) are to be activated or deactivated. 20
5. The test jig (100) as claimed in claim 1, wherein the main power input module (102) supplies alternating current (AC) ranging from 220 V to 250 V.
6. The test jig (100) as claimed in claim 1, wherein each of the two input-side capacitors (106) has a capacitance of 5 Micro Farad (µF) and an output alternating current (AC) up to 250 V. 25
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7. The test jig (100) as claimed in claim 1, wherein the resistor (108) has a 300 OHM resistance.
8. The test jig (100) as claimed in claim 1, wherein each of the one or more output-side capacitors (112) has a capacitance of 5600 Micro Farad (µF) and output direct current (DC) up to 150 V. 5
9. The test jig (100) as claimed in claim 1, wherein the number of the one or more output-side capacitors (112) is selected based on the requirement of the output voltage.
10. The test jig (100) as claimed in claim 1, wherein the main power input module (102) is coupled with a main-on indication lamp (104), the main-on indication lamp 10 (104) being configured to indicate supply voltage of alternating current (AC) from the main power input module (102). ,