Induction electricity measuring clamp for MCC drawer cabinet cable installation and cable installation method

Abstract

The invention discloses an induction electricity measuring clamp for MCC drawer cabinet cable installation. The induction electricity measuring clamp comprises an insulation clamp and an induction electricity measuring device fixed to the insulation clamp. Wherein the induction electricity measuring device comprises an alarm lamp, a toggle switch, an induction coil and an internal circuit board; before construction, the insulation clamp is clamped on a cable, electric field and voltage signals of the cable are induced through the induction coil, and warning signals are sent out after the electric field and voltage signals are analyzed through the internal circuit board; and the toggle switch is used for controlling the on-off of a power supply of the inductive electricity measuring device. Before construction, the device is clamped on an installed cable, the alarm lamp can effectively prompt a constructor whether the device is electrified or not, personnel are effectively prevented from being in contact with electrified terminals, electric shock accidents are avoided, the personal safety of the constructor and equipment safety are guaranteed, and the safety consciousness and the protection capability are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of cable installation, and in particular to an inductive electrical measuring clamp used for cable installation of an MCC drawer cabinet and a cable installation method. Background Art

[0002] Most of the MCC drawer cabinets currently produced have power indicator lights located on the front side of the cabinet, and the feeder terminals are located on the back side of the cabinet. Before installing the feeder cable wiring of the drawer cabinet, construction workers may easily neglect to check the power indicator lights of the powered drawer cabinets on the front side of the cabinet. Secondly, there is no obvious power display on the feeder terminal side of the MCC drawer cabinet to remind construction workers, so it is easy for construction workers to get electric shock accidents and electrical equipment to be damaged, causing irreparable losses. Summary of the invention

[0003] Since the prior art has the above defects, the present invention provides an inductive electrical detection clamp and a cable installation method for MCC drawer cabinet cable installation to solve the problem that it is not easy to judge whether the cable installation of the existing MCC drawer cabinet is energized.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The inductive electrical measuring clamp used for cable installation in MCC drawer cabinets comprises an insulating clamp and an inductive electrical measuring device fixed on the insulating clamp; wherein the inductive electrical measuring device comprises an alarm light, a toggle switch, an inductive coil and an internal circuit board; before construction, the insulating clamp is clamped on the cable, and the electric field and voltage signal of the cable are induced by the inductive coil, and a warning signal is issued after analysis by the internal circuit board; the toggle switch is used to control the power on and off of the inductive electrical measuring device.

[0006] The inductive electrical measuring device is fixed on the insulating clamp by means of PE foam double-sided adhesive.

[0007] The insulating clip is a plastic clip.

[0008] The internal circuit includes an amplifier circuit composed of triodes.

[0009] The amplifier circuit comprises three NPN type triodes connected in cascade.

[0010] The cable installation method of the MCC drawer cabinet includes the following steps:

[0011] Step 1, prepare a number of the inductive electrical test clips and perform functional testing;

[0012] Step 2: Clamp the inductive current measuring clamp onto the installed feeder cables of the MCC drawer cabinet. Use one inductive current measuring clamp for each group of feeder cables.

[0013] Step 3: Detect all feeder cables and determine the cable's charged state based on the state of the alarm light in the induction test clamp;

[0014] Step 4: Provide insulation safety protection for the wiring terminals of the power cables that have been supplied;

[0015] Step 5: Install and connect cables to the unconnected MCC drawer cabinets, and check the quality of the cable installation and wiring until the wiring is completed.

[0016] The specific process of functional testing of the inductive test clamp is as follows:

[0017] Clip the induction test clamp onto a known charged object to test its induction charge display function. Use the alarm light to display the status to confirm whether the function is normal.

[0018] The specific judgment process of step 3 is as follows:

[0019] During the test of the feeder cable that has been wired, installed and powered, the alarm light in the induction test clamp is always on, indicating that the cable is energized;

[0020] When testing feeder cables that have been wired and installed but not energized, the alarm light in the induction test clamp will not light up, indicating that the cable is not energized.

[0021] Use insulating blankets or insulating boards to provide insulation safety protection for the wiring terminals of the powered cables.

[0022] In step 5, confirm that the cable installation and wiring work has been completed in the cabinet, and recover the inductive electrical test clamp in the cabinet;

[0023] If the installation and wiring of all cables in the cabinet have not been completed, the induction test clamp should be retained to remind the construction personnel who will carry out the subsequent cable installation and wiring work that the cables in the cabinet are energized;

[0024] Until the cable installation and wiring work is completely completed, all the induction measuring clamps in the cabinet are recovered.

[0025] Compared with the prior art, the above invention has the following advantages or beneficial effects:

[0026] 1. Improve construction safety: The design of the induction test clamp allows construction workers to easily detect the live state of the installed cables before installing the cables in the MCC drawer cabinet. This function greatly reduces the risk of electric shock for construction workers when they touch cables that may be live.

[0027] 2. Reduce the risk of equipment damage: By promptly indicating the live status of the cable, the induction measuring clamp helps prevent construction workers from mistakenly touching live equipment, thereby reducing the possibility of damage to electrical equipment due to mistaken contact.

[0028] 3. Ensure the personal safety of construction workers: As an auxiliary tool, the induction test clamp improves the safety awareness and protection ability of construction workers. Construction workers can avoid contact with live parts according to the prompts of the induction test clamp, thereby ensuring their own safety.

[0029] 4. Improve work efficiency: The use of induction measuring clamps helps to improve construction efficiency and make the overall work process smoother.

[0030] 5. Enhance construction quality: Since the induction measuring clamp can help construction workers more accurately determine the live state of the cable, it helps to improve the accuracy and quality of cable installation and reduce potential problems caused by improper installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0032] Figure 1 This is a simplified application diagram of the inductive electrical measuring clamp of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of the inductive electrical measuring clamp of the present invention.

[0034] Figure 3 This is the principle diagram of the induction electrical measurement clamp of the present invention.

[0035] Among them, 100-plastic clip; 200-PE foam double-sided tape; 300-inductive electrical measuring device; 301-toggle switch; 302-alarm light; 303-induction coil. DETAILED DESCRIPTION

[0036] The structure of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0037] The technical problem to be solved by the present invention is that most of the MCC drawer cabinets currently produced have power indicator lights located on the front side of the cabinet, and the feeder wiring terminals are located on the rear side of the cabinet. Before installing the feeder cable wiring of the drawer cabinet, construction workers are likely to neglect the inspection of the power indicator lights of the drawer cabinets that have been powered on on the front side of the cabinet. Secondly, there is no obvious power display on the feeder wiring terminal side of the MCC drawer cabinet to remind the construction workers, so it is easy for construction workers to get electric shock accidents and electrical equipment to be damaged, causing irreparable losses.

[0038] Therefore, an inductive electrical measuring clamp for cable installation in MCC drawer cabinets was developed. It is clamped on the installed cable before construction. Its alarm light can effectively remind construction workers whether it is energized and effectively prevent people from touching the live terminals and causing electric shock accidents, thereby ensuring the personal safety of construction workers and equipment safety and enhancing safety awareness and protection capabilities.

[0039] The inductive electrical measuring clamp used for cable installation in MCC drawer cabinets comprises an insulating clamp and an inductive electrical measuring device fixed on the insulating clamp; wherein the inductive electrical measuring device comprises an alarm light, a toggle switch, an inductive coil and an internal circuit board; before construction, the insulating clamp is clamped on the cable, and the electric field and voltage signal of the cable are induced by the inductive coil, and a warning signal is issued after analysis by the internal circuit board; the toggle switch is used to control the power on and off of the inductive electrical measuring device.

[0040] Specific embodiments, such as Figures 1 to 3 As shown,

[0041] The induction electrical measuring clamp is composed of a plastic clamp, PE foam double-sided tape, and an induction electrical measuring device, wherein the induction electrical measuring device is composed of an alarm light, a toggle switch, an induction coil, and an internal circuit structure.

[0042] The inductive electrical measuring clamp for cable installation in the MCC drawer cabinet is used to display the live cables in the MCC drawer cabinet according to the design function requirements. The live warning light is used to prompt construction personnel to determine whether the cable is live, so as to avoid electric shock accidents to construction personnel and protect personal and equipment safety.

[0043] The inductive test clamp can include the following functions:

[0044] Cable live alarm display: The induction measuring clamp is clamped on the cable, and the induction coil in the induction measuring device senses the cable electric field and voltage signal, which is input into the internal circuit and amplified and conducted by the internal NPN transistor, so that the alarm light forms a loop with the power supply in the induction measuring device, and the alarm light is always on.

[0045] The plastic clip 100 is used for clamping and fixing the inductive electrical measurement clamp on the cable. It is made of engineering plastic (ABS: acrylonitrile-butadiene-styrene is selected in this embodiment) and has a long service life and can be reused, and reduces the damage of the inductive electrical measurement clamp to the cable.

[0046] The PE foam double-sided adhesive tape 200 is used to fix the plastic clip 100 and the inductive electrical measuring device 300. The plastic clip 100 and the inductive electrical measuring device 300 are bonded and fixed by the PE foam double-sided adhesive tape 200, which is conducive to replacing a damaged inductive electrical measuring device 300 and improving the utilization rate.

[0047] The inductive electrical measuring device 300 is composed of a toggle switch 301, an alarm light 302, an induction coil 303 and an internal circuit structure.

[0048] The toggle switch 301 is used for controlling the power supply disconnection in the internal circuit of the inductive power measuring device 300.

[0049] The warning light 302 is used to detect that the cable is charged by the induction electrical measuring device 300.

[0050] The induction coil 303 is used for the induction electrical measuring device 300 to capture the extremely small electric field and voltage signal generated by the charged cable and input it into the internal circuit.

[0051] The internal circuit includes an amplifier circuit composed of three NPN-type triodes in cascade, which are the first to third triodes. The base of the first triode is connected to one end of the induction coil, the emitter of the first triode is connected to the base of the second triode, the collector of the first triode is connected to the collector of the second triode, one way is connected to the collector of the third triode after passing through an alarm light and a resistor, and the other way is connected to the positive pole of the power supply through a toggle switch, the negative pole of the power supply is connected to the emitter of the third triode, and the emitter of the second triode is connected to the base of the third triode.

[0052] The transistor of this embodiment is BC547, and the resistor is 330 ohms.

[0053] The cable installation method of the MCC drawer cabinet includes the following steps:

[0054] Step 1, prepare a number of the inductive electrical test clips and perform functional testing;

[0055] Step 2: Clamp the inductive current measuring clamp onto the installed feeder cables of the MCC drawer cabinet. Use one inductive current measuring clamp for each group of feeder cables.

[0056] Step 3: Detect all feeder cables and determine the cable's charged state based on the state of the alarm light in the induction test clamp;

[0057] Step 4: Provide insulation safety protection for the wiring terminals of the power cables that have been supplied;

[0058] Step 5: Install and connect cables to the unconnected MCC drawer cabinets, and check the quality of the cable installation and wiring until the wiring is completed. Specific embodiments

[0060] The cable installation method of the MCC drawer cabinet includes the following steps:

[0061] Step 1: The construction personnel confirm the location of the MCC drawer cabinet where the required cables are installed and wired.

[0062] Step 2: Use PE foam double-sided tape 200 to firmly bond the inductive electrical measuring device 300 to the plastic clip 100 .

[0063] Step 3: The induction test clamp manager performs a functional test on the induction test clamp. The induction test clamp is clamped on a known charged object to test its induction charged display function. After confirming that the function is normal, proceed to the next step.

[0064] Step 4: Clamp the inductive current measuring clamp onto the installed feeder cables of the MCC drawer cabinet. Use one inductive current measuring clamp for each group of feeder cables.

[0065] Step 5: When testing the feeder cable that has been wired, installed and powered, the alarm light 302 in the induction test clamp is always on, indicating that the cable is energized; when testing the feeder cable that has been wired, installed but not powered, the alarm light 302 in the induction test clamp is not on, indicating that the cable is not energized.

[0066] Step 6: Use insulating blankets or insulating boards to provide insulation safety protection for the wiring terminals of the energized cables.

[0067] Step 7: Construction personnel carry out cable installation and wiring construction on the unconnected MCC drawer cabinets.

[0068] Step 8: Check the quality of cable installation and wiring construction.

[0069] Step 9: Confirm that the cable installation and wiring work has been completed in this cabinet, and recycle the inductive current measuring clamps in the cabinet. If the cable installation and wiring work of this cabinet has not been completed, keep the inductive current measuring clamps to remind the construction personnel who will carry out the subsequent cable installation and wiring work of the cable live status in the cabinet until the cable installation and wiring work is completed, and then recycle all the inductive current measuring clamps in the cabinet.

[0070] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0071] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0072] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0073] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. The inductive measuring clamp used for cable installation in MCC drawer cabinets is characterized by: It includes an insulating clamp and an inductive electrical measuring device fixed on the insulating clamp; wherein the inductive electrical measuring device includes an alarm light, a toggle switch, an inductive coil and an internal circuit board; before construction, the insulating clamp is clamped on the cable, the electric field and voltage signals of the cable are induced by the inductive coil, and a warning signal is issued after analysis by the internal circuit board; the toggle switch is used to control the power on and off of the inductive electrical measuring device.

2. The inductive electrical measuring clamp for MCC drawer cabinet cable installation according to claim 1 is characterized in that: The inductive electrical measuring device is fixed on the insulating clamp by means of PE foam double-sided adhesive.

3. The inductive electrical measuring clamp for cable installation in MCC drawer cabinets according to claim 2 is characterized in that: The insulating clip is a plastic clip.

4. The inductive electrical measuring clamp for MCC drawer cabinet cable installation according to claim 1 is characterized in that: The internal circuit includes an amplifier circuit composed of triodes.

5. The inductive electrical measuring clamp for MCC drawer cabinet cable installation according to claim 4 is characterized in that: The amplifier circuit comprises three NPN type triodes connected in cascade.

6. MCC drawer cabinet cable installation method, characterized by: The steps include: Step 1, prepare a number of induction electrical test clamps as described in any one of claims 1 to 5, and perform functional tests; Step 2: Clamp the inductive current measuring clamp onto the installed feeder cables of the MCC drawer cabinet. Use one inductive current measuring clamp for each group of feeder cables. Step 3: Detect all feeder cables and determine the cable's charged state based on the state of the alarm light in the induction test clamp; Step 4: Provide insulation safety protection for the wiring terminals of the power cables that have been supplied; Step 5: Install and connect cables to the unconnected MCC drawer cabinets, and check the quality of the cable installation and wiring until the wiring is completed.

7. The MCC drawer cabinet cable installation method according to claim 6, characterized in that: The specific process of functional testing of the inductive test clamp is as follows: Clip the induction test clamp onto a known charged object to test its induction charge display function. Use the alarm light to display the status to confirm whether the function is normal.

8. The MCC drawer cabinet cable installation method according to claim 6, characterized in that: The specific judgment process of step 3 is as follows: During the test of the feeder cable that has been wired, installed and powered, the alarm light in the induction test clamp is always on, indicating that the cable is energized; When testing feeder cables that have been wired and installed but not energized, the alarm light in the induction test clamp will not light up, indicating that the cable is not energized.

9. The MCC drawer cabinet cable installation method according to claim 6, characterized in that: Use insulating blankets or insulating boards to provide insulation safety protection for the wiring terminals of the powered cables.

10. The MCC drawer cabinet cable installation method according to claim 6, characterized in that: In step 5, confirm that the cable installation and wiring work has been completed in the cabinet, and recover the inductive electrical test clamp in the cabinet; If the installation and wiring of all cables in the cabinet have not been completed, the induction test clamp should be retained to remind the construction personnel who will carry out the subsequent cable installation and wiring work that the cables in the cabinet are energized; Until the cable installation and wiring work is completely completed, all the induction measuring clamps in the cabinet are recovered.

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