Temperature rise test equipment for current transformer

Abstract

The utility model discloses a current transformer temperature rise test device comprising a cabinet, the upper surface of which is provided with a bearing plate used for placing a current transformer; a probe bracket is arranged on the upper surface of the cabinet and is used for placing a temperature measuring probe, and the probe bracket and the bearing plate are correspondingly arranged; the device comprises a module, a placing seat and a plurality of groups of partition plate assemblies, the plurality of groups of partition plate assemblies are slidably mounted in the placing seat, and the module is detachably mounted in the placing seat through the plurality of groups of partition plate assemblies; and the wire arrangement assembly is fixedly installed at one end of the partition plate assembly and used for assisting module wire arrangement. According to the utility model, the module can be clamped and fixed, the module can be conveniently assembled and disassembled, and the connecting wires are firstly arranged in advance through the wire arrangement assembly, so that the connecting wires used by the module can be conveniently limited and fixed, and the phenomena of exposure, winding and knotting of a large number of connecting wires are avoided; and the wiring at the test position is neat, so that the tidiness of the flat cable is improved, and the safety is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of current transformer detection, and in particular relates to a current transformer temperature rise test device. Background Art

[0002] At present, in the test of metering and inspection projects of instruments, current transformers need to undergo temperature rise tests. Current transformers are components that realize current conversion based on the principle of electromagnetic induction. They are mainly composed of primary windings and secondary windings of electromagnetic mutual inductance. When the current transformer is working, the primary winding is connected to the current to be converted. The current energizes the primary winding to form a magnetic field, and forms a current in the secondary winding through the electromagnetic induction phenomenon, thereby completing the current conversion process.

[0003] However, there are some problems with the existing technology: the existing current transformer temperature test equipment needs to perform corresponding wire pulling and wiring during the test, and the operation process is cumbersome, resulting in low test efficiency; and the number of wirings in the test process is large, which is prone to wrong connection and missed connection, and a large number of connecting wires are exposed, which is prone to entanglement and knotting of the connecting wires, which not only leads to confusion in the wiring at the test position, but also poses certain safety hazards. Therefore, we propose a current transformer temperature test equipment. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a current transformer temperature rise test equipment. Through the mutual cooperation of the partition assembly and the placement seat, after the module is placed on the placement seat, the partition assembly is pulled to slide on the placement seat to clamp and fix the module, thereby achieving the effect of facilitating the installation and disassembly of the module; the connecting wires are pre-arranged by the wiring assembly, so as to facilitate the limiting and fixing of the connecting wires used by the module, avoiding the phenomenon of a large number of connecting wires being exposed and entangled, so that the wiring at the test position is neat to improve the neatness of the wiring, and the safety is higher.

[0005] The utility model is implemented as follows: a current transformer temperature rise test device, comprising:

[0006] A cabinet, wherein a bearing plate is disposed on the upper surface of the cabinet for placing a current transformer; a probe bracket is disposed on the upper surface of the cabinet for placing a temperature measuring probe, and the probe bracket is disposed correspondingly to the bearing plate;

[0007] A module, a placement seat and multiple sets of partition assemblies, wherein the multiple sets of partition assemblies are slidably installed in the placement seat, and the module is detachably installed in the placement seat through the multiple sets of partition assemblies;

[0008] The cable arrangement assembly is fixedly mounted on one end of the partition assembly to assist the module in cable arrangement.

[0009] Optionally, the module includes a current-rising module, a load module, a resistance detection module and a temperature measurement module, and the current-rising module, the load module, the resistance detection module and the temperature measurement module are detachably installed in the placement seat through two adjacent groups of partition assemblies.

[0010] Optionally, the partition assembly includes a fixed plate, and sliders are fixedly installed at both ends of the lower surface of the fixed plate. Two groups of sliding grooves are opened in the placement seat, and the sliders are slidably installed in the sliding grooves.

[0011] Optionally, electric push rods are fixedly installed at both ends of one side of the fixed plate, a movable plate is provided at one end of the electric push rod piston rod, multiple groups of pads are provided on the other side of the fixed plate and the movable plate, and a wire release hole is opened in the middle of one side of the fixed plate and the movable plate.

[0012] Optionally, a support is fixedly installed at one end of the fixed plate, the cable assembly is fixedly installed on the support, a screw is arranged in the support, a slot is opened on one side of the inner wall of the placement seat, the support is movably installed in the slot, a plurality of groups of threaded holes are opened on the lower surface of the slot, and the screw is threadedly connected to the threaded holes.

[0013] Optionally, the cable assembly includes a fixed seat, a jacket is arranged above the fixed seat, racks are fixedly installed on both sides of one end of the jacket, a docking groove is opened at one end of the fixed seat, and gear grooves are opened on both sides of the inner wall of the docking groove, and the rack is meshed and connected with the docking groove.

[0014] Optionally, a rotating shaft is rotatably mounted on the lower end of the inner wall of the docking groove, torsion springs are arranged at both ends of the rotating shaft, one end of the torsion spring is arranged on a fixed seat, and a sealing plate is fixedly mounted on the outer surface of the rotating shaft.

[0015] Optionally, a control panel is provided at one end of the cabinet, a control module is provided in the control panel, and the control module is electrically connected to the current boost module, the load module, the resistance detection module and the temperature measurement module respectively;

[0016] The current boosting module is composed of a current booster and a voltage regulator. The current booster is arranged on the upper surface of the cabinet and is formed with at least two current boosting interfaces. The voltage regulator is electrically connected to the current booster.

[0017] The load module includes at least two current load boxes, which are arranged inside the cabinet and have load interfaces formed on the upper surface of the cabinet;

[0018] The resistance detection module includes multiple groups of resistance detectors, four groups of resistance detectors are arranged side by side inside the cabinet, and the resistance detectors are provided with resistance detection interfaces on the upper surface of the cabinet;

[0019] The temperature measurement module comprises a multi-channel temperature patrol meter, and the multi-channel temperature patrol meter comprises a plurality of groups of temperature measuring probes, and the plurality of groups of temperature measuring probes are respectively arranged on a plurality of groups of probe brackets.

[0020] Optionally, an indicator light is provided at one end of the upper surface of the cabinet, and the indicator light is electrically connected to the control module.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. Through the cooperation between the partition assembly and the placement seat provided in the utility model, after the module is placed on the placement seat, the partition assembly is pulled to slide on the placement seat to clamp and fix the module, thereby achieving the effect of facilitating the installation and disassembly of the module.

[0023] 2. Through the wiring assembly provided by the utility model, when installing the module, the connecting wires are pre-arranged through the wiring assembly, so as to facilitate the limiting and fixing of the connecting wires used in the module, avoid the phenomenon of a large number of connecting wires being exposed and entangled, make the wiring at the test position neat, improve the neatness of the wiring, and have higher safety.

[0024] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram provided by the utility model;

[0026] Figure 2 This is a schematic diagram of the current-rising module provided by the utility model;

[0027] Figure 3 This is a schematic diagram of a resistance detection module provided by the utility model;

[0028] Figure 4 This is a schematic diagram of the placement seat provided by the utility model;

[0029] Figure 5 It is a schematic diagram of the partition assembly provided by the utility model;

[0030] Figure 6 It is a schematic diagram of the cable assembly provided by the utility model;

[0031] Figure 7 It is a schematic diagram of control module connection provided by the utility model.

[0032] In the figure: 1. cabinet; 2. cover plate; 3. probe bracket; 4. bearing plate; 5. current transformer; 6. indicator light; 7. control panel; 8. placement seat; 9. partition assembly; 901. fixed plate; 902. movable plate; 903. pad; 904. wire release hole; 905. support; 906. electric push rod; 907. screw; 908. slider; 10. wiring assembly; 1001. fixed seat; 1002. jacket; 1003. rack; 1004. docking groove; 1005. tooth groove; 1006. sealing plate; 1007. rotating shaft; 11. current boosting module; 1101. current booster; 1102. voltage regulator; 12. load module; 13. temperature measurement module; 14. resistance detection module; 15. slide groove; 16. threaded hole. DETAILED DESCRIPTION

[0033] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0034] like Figures 1 to 7 As shown, a current transformer temperature rise test device provided by an embodiment of the utility model comprises:

[0035] Cabinet 1, the upper surface of the cabinet 1 is provided with a bearing plate 4 for placing a current transformer 5; the upper surface of the cabinet 1 is provided with a probe bracket 3 for placing a temperature measuring probe, and the probe bracket 3 is arranged corresponding to the bearing plate 4; a module, a placement seat 8 and multiple sets of partition assemblies 9, the multiple sets of partition assemblies 9 are all slidably installed in the placement seat 8, and the module is detachably installed in the placement seat 8 through the multiple sets of partition assemblies 9; a wiring assembly 10, the wiring assembly 10 is fixedly installed at one end of the partition assembly 9 to assist the module in wiring;

[0036] Specifically, Figures 1 to 3 As shown, the cabinet 1 is a rectangular cabinet structure, and a handle is formed on its outer surface for easy pulling. The cabinet 1 is hollow inside for placing a placement seat 8. When installing, the module is placed on the placement seat 8, and the module is limited and fixed by the partition assembly 9, so that the module is fixed in the cabinet 1;

[0037] It should be noted that both sides of the cabinet 1 are opened, and cover plates 2 are rotatably installed at the openings. The two groups of cover plates 2 correspond to two groups of placement seats 8 respectively, thereby achieving the effect of facilitating the installation and disassembly of the module. The bottom of the cabinet 1 is also provided with lockable universal wheels to facilitate the movement of the entire device.

[0038] The current transformer 5 is inserted into the supporting plate 4 to be fixed, and the edge of the supporting plate 4 can also be fastened with a snap to lock the shell of the current transformer 5. The supporting plate 4 can fix the current transformer 5 to prevent the current transformer 5 from shifting and falling during the test, causing the wiring to fall off, so that the test process can proceed smoothly.

[0039] Three probe brackets 3 distributed in a triangle are provided on the outer side of the carrier plate 4. The temperature measuring probe is arranged on the probe bracket 3 to facilitate the installation of the temperature measuring probe. At the same time, the position of the temperature measuring probe can be fixed, so that the temperature detection accuracy is high.

[0040] like Figures 2 to 5 As shown, the cable assembly 10 and the partition assembly 9 are arranged as a whole, so that two adjacent groups of partition assemblies 9 clamp a group of modules. After the modules are positioned, the cable assembly 10 is located between the two adjacent groups of partition assemblies 9, and is arranged opposite to a group of modules. The connecting wires required by the modules are passed through the cable assembly 10, and the connecting wires are pre-arranged through the cable assembly 10, and other modules are installed and placed in turn, so as to facilitate the limiting and fixing of the connecting wires used by the modules, avoid the phenomenon of a large number of connecting wires being exposed and entangled, and make the wiring at the test position neat to improve the neatness of the wiring, and have higher safety.

[0041] Further, the partition assembly 9 includes a fixed plate 901, and sliders 908 are fixedly installed at both ends of the lower surface of the fixed plate 901, and two groups of slide grooves 15 are opened in the placement seat 8, and the sliders 908 are slidably installed in the slide grooves 15; electric push rods 906 are fixedly installed at both ends of one side of the fixed plate 901, and a movable plate 902 is arranged at one end of the piston rod of the electric push rod 906, and multiple groups of pads 903 are arranged on the other side of the fixed plate 901 and the movable plate 902, and a wire release hole 904 is opened in the middle of one side of the fixed plate 901 and the movable plate 902;

[0042] Specifically, Figures 2 to 5 As shown, the fixed plate 901 slides in the slide groove 15 through the slider 908, so that the fixed plate 901 slides on the placement seat 8, so that the position of the fixed plate 901 can be adjusted according to the size of the module, thereby limiting the module.

[0043] It should be noted that the sizes of modules are different, and it is easy for the internal space of the placement seat 8 to be unable to be filled after multiple groups of modules are installed, resulting in the modules being unable to be fixed. The present invention uses a new type of movable plate 902 and two groups of electric push rods 906 on one side of the fixed plate 901. The electric push rods 906 are started to drive the movable plate 902 to move into position, thereby solving the above problems in turn and improving practicality. The spacing distance between the fixed plate 901 and the movable plate 902 can be used to connect two adjacent groups of modules.

[0044] Further, a support 905 is fixedly installed at one end of the fixing plate 901, and the cable assembly 10 is fixedly installed on the support 905. A screw 907 is arranged in the support 905. A slot is provided on one side of the inner wall of the placement seat 8. The support 905 is movably installed in the slot. A plurality of threaded holes 16 are provided on the lower surface of the slot. The screw 907 is threadedly connected with the threaded holes 16.

[0045] Specifically, Figure 4 and Figure 5 As shown, one end of the screw rod 907 is aligned with a set of threaded holes 16, and then the screw rod 907 is rotated to make one end of the screw rod 907 extend into the threaded hole 16 to limit and fix the support 905, thereby limiting the fixing plate 901 and preventing it from sliding, thereby achieving the effect of facilitating installation and use.

[0046] Furthermore, the cable assembly 10 includes a fixing seat 1001, a jacket 1002 is arranged above the fixing seat 1001, racks 1003 are fixedly installed on both sides of one end of the jacket 1002, a docking groove 1004 is opened at one end of the fixing seat 1001, and tooth grooves 1005 are opened on both sides of the inner wall of the docking groove 1004, and the rack 1003 is meshed and connected with the docking groove 1004;

[0047] Specifically, Figure 5 and Figure 6 As shown, by pressing down or pulling up one end of the jacket 1002, the rack 1003 at one end of the jacket 1002 slides on the tooth groove 1005 in the docking groove 1004, so as to adjust the distance between the jacket 1002 and the fixing seat 1001, thereby achieving the effect of facilitating the adjustment of the clamping distance according to the connecting line.

[0048] Furthermore, a rotating shaft 1007 is rotatably mounted on the lower end of the inner wall of the docking groove 1004, and torsion springs are arranged at both ends of the rotating shaft 1007, one end of the torsion spring is arranged on the fixed seat 1001, and a sealing plate 1006 is fixedly mounted on the outer surface of the rotating shaft 1007;

[0049] Specifically, Figure 6 As shown, by pulling the upper end of the sealing plate 1006 to one side to expand the docking groove 1004, the end of the jacket 1002 with the rack 1003 can slide in the docking groove 1004; on the contrary, by loosening the upper end of the sealing plate 1006, the sealing plate 1006 will automatically return to its original position through two sets of torsion springs to fix the jacket 1002.

[0050] Further, the module includes a current-increasing module 11, a load module 12, a resistance detection module 14 and a temperature measurement module 13. The current-increasing module 11, the load module 12 (used to be electrically connected to the secondary winding to connect a load to the current transformer 5, and the connected load of the load module 12 can be adjusted according to the experimental requirements of the current transformer 5), the resistance detection module 14 and the temperature measurement module 13 (used to measure the shell temperature, the winding temperature and the test environment temperature of the current transformer 5, and convert the measured temperature into an electrical signal for transmission) are respectively detachably installed in the placement seat 8 through two adjacent groups of partition components 9; a control panel 7 is provided at one end of the cabinet 1, and a control module is provided in the control panel 7, and the control module is electrically connected to the current-increasing module 11, the load module 12, the resistance detection module 14 and the temperature measurement module 13 respectively; the control module may include a single-chip microcomputer or a PLC to achieve a stable control effect;

[0051] Specifically, the current transformer 5 includes a primary winding and a secondary winding having electromagnetic mutual inductance.

[0052] The current boosting module 11 is used to be electrically connected to the primary winding to input current to the current transformer 5. The current boosting module 11 consists of a current booster 1101 and a voltage regulator 1102. The current booster 1101 is arranged on the upper surface of the cabinet 1 and is formed with at least two current boosting interfaces. The voltage regulator 1102 is electrically connected to the current booster 1101; the current booster 1101 is connected to the primary winding as a test current source for the current transformer 5, and the current boosting module 11 can provide a stable test current for the current transformer 5 through the current boosting function of the current booster 1101 and the voltage regulating function of the voltage regulator 1102.

[0053] Furthermore, the load module 12 includes at least two current load boxes, which are arranged inside the cabinet 1, and the current load boxes are formed with load interfaces on the upper surface of the cabinet 1 to facilitate the connection between the secondary winding and the load;

[0054] Further, the resistance detection module 14 includes a plurality of groups of resistance detectors, which are arranged side by side inside the cabinet 1, and the resistance detectors are provided with resistance detection interfaces on the upper surface of the cabinet 1;

[0055] Specifically, Figure 3 As shown, several groups of resistance detectors are electrically connected to the primary winding and the secondary winding respectively, and each winding is measured for resistance by a resistance detector, specifically measuring the cold resistance of the winding before power is supplied and the thermal steady-state resistance of the line after the temperature rise is stabilized.

[0056] It should be noted that the resistance detector is provided with a resistance detection interface on the surface of the cabinet 1 , and the resistance detection interface is connected to the winding of the current transformer 5 to be tested through a connecting line, which has the advantage of convenient wiring.

[0057] Furthermore, the temperature measuring module 13 includes a multi-channel temperature inspection instrument, which includes multiple groups of temperature measuring probes, and the multiple groups of temperature measuring probes are respectively arranged on multiple groups of probe brackets 3; an indicator light 6 is arranged at one end of the upper surface of the cabinet 1, and the indicator light 6 is electrically connected to the control module;

[0058] Specifically, Figure 3 As shown, the multi-channel temperature inspection instrument can measure the temperature of multiple positions at the same time, which can meet the test requirements of the current transformer 5 and has high measurement accuracy; the indicator light 6 is used to indicate the operating status of the device.

[0059] Test wiring:

[0060] Take the current transformer 5 to be tested, connect the interface of the current booster 1101 to the primary winding, connect the load interface to the secondary winding, connect the interfaces above the resistance detection to the primary winding and the secondary winding respectively, and set the temperature measuring probes of the multi-channel temperature patrol instrument on the outer casing of the current transformer 5 near the position of the coil core and the primary winding respectively. In addition, install the three temperature measuring probes on the probe bracket 3 respectively to check whether the wiring is reliable and firm.

[0061] The device power is turned on, the device is started, parameter information of the current transformer 5 to be tested is input on the control panel 7, and the device starts the resistance detector and the multi-channel temperature inspection instrument.

[0062] Click the start button, the device begins to record the cold resistance and initial temperature data at this time, then disconnect the power supply of the resistance tester, start the current load box, the current load box applies a load to the current transformer 5, and then start the current booster 1101 and the voltage regulator 1102 to apply 1.2 times the rated current to the current transformer 5.

[0063] The multi-channel temperature inspection instrument detects the shell temperature, primary winding temperature and test environment temperature. After the temperature rise of the current transformer 5 is stable (the temperature rise does not exceed 1k between two adjacent records), the indicator light 6 lights up, click the stop button, and the device immediately records the temperature data at this time, and then disconnects the power supply of the current boost module 11 and the load module 12.

[0064]

[0065] Click the Calculate Temperature Rise button, wait for the multi-channel temperature inspection instrument to measure the resistance values ​​of the primary winding and the secondary winding, record the resistance value data once every interval (30s-60s), record about 10 groups of data, and measure another group of reference values ​​after 5min-10min. The control module 60 calculates the temperature rise value of the current transformer 5 by the following formula:

[0066] Among them, Δθ represents the temperature rise value, Rx is the cold resistance, R0 is the transient resistance at the moment of disconnecting the power supply of the current booster 1101, θ1 is the cold ambient temperature, θ2 is the thermal steady-state ambient temperature, and 235 represents the reciprocal of the temperature coefficient of resistance of the copper wire. A curve graph is generated according to the calculation result of the above formula, and the curve graph is checked to determine whether the current transformer 5 of the test is qualified. After the test is completed, the motor is turned off to put the device into a power-off state.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A current transformer temperature rise test equipment, characterized in that: include: A cabinet (1), wherein a bearing plate (4) is arranged on the upper surface of the cabinet (1) for placing a current transformer (5); a probe bracket (3) is arranged on the upper surface of the cabinet (1) for placing a temperature measuring probe, and the probe bracket (3) and the bearing plate (4) are arranged correspondingly; A module, a placement seat (8) and a plurality of partition plate assemblies (9), wherein the plurality of partition plate assemblies (9) are slidably mounted in the placement seat (8), and the module is detachably mounted in the placement seat (8) via the plurality of partition plate assemblies (9); A wiring assembly (10) is fixedly mounted on one end of the partition assembly (9) to assist the module in wiring.

2. A current transformer temperature rise test equipment according to claim 1, characterized in that: The module comprises a current-increasing module (11), a load module (12), a resistance detection module (14) and a temperature measurement module (13); the current-increasing module (11), the load module (12), the resistance detection module (14) and the temperature measurement module (13) are respectively detachably mounted in a placement seat (8) via two adjacent sets of partition components (9).

3. A current transformer temperature rise test equipment according to claim 2, characterized in that: The partition assembly (9) comprises a fixed plate (901), and sliders (908) are fixedly installed at both ends of the lower surface of the fixed plate (901). Two groups of sliding grooves (15) are opened in the placement seat (8), and the sliders (908) are slidably installed in the sliding grooves (15).

4. A current transformer temperature rise test equipment according to claim 3, characterized in that: Electric push rods (906) are fixedly installed at both ends of one side of the fixed plate (901), a movable plate (902) is arranged at one end of the piston rod of the electric push rod (906), multiple groups of pads (903) are arranged on the other side of the fixed plate (901) and the movable plate (902), and a wire release hole (904) is opened in the middle of one side of the fixed plate (901) and the movable plate (902).

5. A current transformer temperature rise test equipment according to claim 4, characterized in that: A support (905) is fixedly mounted on one end of the fixing plate (901), the cable assembly (10) is fixedly mounted on the support (905), a screw (907) is arranged inside the support (905), a slot is provided on one side of the inner wall of the placement seat (8), the support (905) is movably mounted in the slot, a plurality of groups of threaded holes (16) are provided on the lower surface of the slot, and the screw (907) is threadedly connected to the threaded holes (16).

6. A current transformer temperature rise test equipment according to claim 5, characterized in that: The cable assembly (10) comprises a fixing seat (1001), a jacket (1002) is arranged above the fixing seat (1001), racks (1003) are fixedly installed on both sides of one end of the jacket (1002), a docking groove (1004) is opened at one end of the fixing seat (1001), and tooth grooves (1005) are opened on both sides of the inner wall of the docking groove (1004), and the rack (1003) is meshedly connected with the docking groove (1004).

7. A current transformer temperature rise test equipment according to claim 6, characterized in that: A rotating shaft (1007) is rotatably mounted on the lower end of the inner wall of the docking groove (1004), and torsion springs are arranged at both ends of the rotating shaft (1007), one end of the torsion spring is arranged on the fixed seat (1001), and a sealing plate (1006) is fixedly mounted on the outer surface of the rotating shaft (1007).

8. A current transformer temperature rise test equipment according to claim 7, characterized in that: A control panel (7) is provided at one end of the cabinet (1), a control module is provided in the control panel (7), and the control module is electrically connected to the current boost module (11), the load module (12), the resistance detection module (14) and the temperature measurement module (13) respectively; The flow-raising module (11) is composed of a flow-raising device (1101) and a voltage regulator (1102); the flow-raising device (1101) is arranged on the upper surface of the cabinet (1) and is provided with at least two flow-raising interfaces; and the voltage regulator (1102) is electrically connected to the flow-raising device (1101); The load module (12) comprises at least two current load boxes, the current load boxes are arranged inside the cabinet (1), and the current load boxes are provided with load interfaces on the upper surface of the cabinet (1); The resistance detection module (14) comprises a plurality of groups of resistance detectors, four groups of the resistance detectors are arranged side by side inside the cabinet (1), and the resistance detectors are provided with resistance detection interfaces on the upper surface of the cabinet (1); The temperature measurement module (13) comprises a multi-channel temperature patrol meter, which comprises a plurality of groups of temperature measurement probes, and the plurality of groups of temperature measurement probes are respectively arranged on a plurality of groups of probe brackets (3).

9. A current transformer temperature rise test equipment according to claim 1, characterized in that: An indicator light (6) is provided at one end of the upper surface of the cabinet (1), and the indicator light (6) is electrically connected to the control module.

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