An external switch, electric energy meter and modular metering box

Abstract

The present invention provides an external switch, an electric energy meter and a modular metering box, which are composed of a number of modular units of the same shape connected together, wherein one modular unit is an electric operating mechanism and is placed at the end, and the rest are phase poles and are arranged in sequence close to the electric operating mechanism, and the modular unit is square and has a boss on one side, that is, one side of the modular unit is composed of a platform and a boss. Advantages: not only is the appearance more beautiful, but also the volume is greatly reduced, saving space; it avoids the traditional neutral phase pole N abnormal disconnection or abnormal disconnection but poor contact, which increases the N pole contact resistance, resulting in unbalanced three-phase voltage and burns the user's household appliances.

Description

Technical Field

[0001] The invention relates to a switch, in particular to an external switch, an electric energy meter and a modular metering box. Background Art

[0002] At present, the external circuit breakers / intelligent switches of three-phase electric energy meters are all 4-pole (4P), and all poles are disconnected contact systems. The neutral line of the working power supply of its electric operating mechanism must be powered through the corresponding N pole. Because the N pole has a breakpoint, it is possible that the N pole is abnormally disconnected or the contact is poor even if it is not disconnected, which increases the resistance of the N pole contact, thereby causing the three-phase voltage of the power supply to be unbalanced and burn the user's household appliances.

[0003] In addition, the existing circuit breakers / intelligent switches have complex structures and occupy a large volume, and some sites cannot meet their space requirements. Summary of the invention

[0004] In order to solve the above defects and shortcomings in the prior art, the present invention provides an external switch, an electric energy meter and a modular metering box.

[0005] In order to solve the above technical problems, the present invention provides an external switch, which is composed of a number of module units of the same shape snapped together, one of which is an electric operating mechanism and is placed at the end, and the rest are phase poles and are arranged in sequence close to the electric operating mechanism. The module unit is square, and one side is composed of a platform and a boss.

[0006] Furthermore, the number of the phase poles is 3, namely phase pole 1, phase pole 2 and phase pole 3, and the live wire of the electric operating mechanism is powered by the incoming line terminals of the phase pole 1, phase pole 2 and phase pole 3.

[0007] Furthermore, the electric operating mechanism is provided with a neutral line taking-in wire, one end of which is led out from the power supply on the circuit board in the electric operating mechanism, and the other end is connected to the N-pole terminal block of the meter box when in use.

[0008] Furthermore, the electric operating mechanism is provided with a signal terminal, and the signal terminal is provided with two terminals, a control terminal and a feedback terminal, which are respectively connected to an electric energy meter.

[0009] Furthermore, the number of phase poles is 4, namely phase pole one, phase pole two, phase pole three and phase pole four. The live wire of the electric operating mechanism is powered by the incoming line terminals of phase pole one, phase pole two, phase pole three and phase pole four. The incoming line terminal and the outgoing line terminal of phase pole four are connected without breakpoints.

[0010] Furthermore, the electric operating mechanism is provided with a signal terminal, and the signal terminal is provided with two terminals, a control terminal and a feedback terminal, which are respectively connected to an electric energy meter.

[0011] Furthermore, wiring terminals are provided at the edges of both ends of the four phase pole bosses and the edges of the platform, namely, wiring terminal 1 to wiring terminal 4, wherein the wiring terminal 1 and the wiring terminal 4 are connected through copper busbar 1; the wiring terminal 2 and the wiring terminal 3 are connected through copper busbar 2, and the copper busbar 1 and the copper busbar 2 are connected through spot welding of soft wires.

[0012] Furthermore, both end edges of the phase pole four platform are provided with connection terminals, which are connection terminal five and connection terminal six respectively, and the connection terminal five and connection terminal six are connected by a soft wire; and an arched protrusion is provided on the boss of the phase pole four.

[0013] Furthermore, a circuit board is provided in the electric operating mechanism.

[0014] In addition, the present invention also provides an electric energy meter using any of the external switches described above.

[0015] Moreover, the present invention also provides a modular metering box using any of the external switches described above.

[0016] The beneficial technical effects achieved by the present invention are as follows: the present invention provides an external switch, an electric energy meter using the external switch, and a modular metering box using the external switch, wherein the phase pole and the electric operating mechanism of the external switch are modularly designed, which is not only more beautiful in appearance, but also greatly reduces the volume and saves space. As an optimized technical solution of the present invention, the internal structure of the phase pole: 1. Adopting a 3P structure: replacing the neutral phase pole N with a neutral line, which greatly reduces the volume of the switch without affecting the function of the switch; or, 2. Adopting a 3P+N structure: directly connecting the incoming and outgoing terminals of the neutral phase pole N internally without a breakpoint, avoiding the abnormal disconnection of the traditional neutral phase pole N or the abnormal disconnection but poor contact, which increases the contact resistance of the N pole, and causes the three-phase voltage imbalance to burn the user's household appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of Embodiment 1 of the present invention;

[0018] Figure 2-Figure 3 A schematic diagram of the structure of Embodiment 2 of the present invention;

[0019] Figure 4-Figure 5 Another structural schematic diagram of embodiment 2 of the present invention.

[0020] Among them: 1 electric operating mechanism; 2 signal terminal; 3 phase pole one; 4 phase pole two; 5 phase pole three; 6 phase pole four; 7 neutral wire; 8 terminal one; 9 terminal two; 11 terminal three; 12 terminal four; 13 copper busbar one; 14 copper busbar two; 15 soft wire; 16 terminal five; 17 terminal six. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with specific examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention.

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] The present invention provides an external switch, which is composed of a plurality of module units of the same shape connected together, wherein one module unit is an electric operating mechanism 1, which is placed at the end, and the other modules are phase poles, which are arranged in sequence close to the electric operating mechanism, and the module unit is square, and a boss is provided on one side surface, that is, one side surface of the module unit is composed of a platform and a boss. The phase pole and the electric operating mechanism are modularly designed, which is not only more beautiful in appearance, but also greatly reduces the volume and saves space.

[0024] As an embodiment 1 of the present application, Figure 1 As shown, a 3P structure is adopted: the number of phase poles is 3, namely phase pole 1 3, phase pole 2 4 and phase pole 3 5, and the live wire of the electric operating mechanism 1 is connected to the incoming line end of the phase pole 1 3, phase pole 2 4 and phase pole 3 5. The electric operating mechanism 1 is provided with a neutral line taking wire 7, one end of which is led out from the power supply on the circuit board in the electric operating mechanism 1. When in use, the other end is connected to the N-pole terminal block of the meter box. The neutral phase pole N is replaced by the neutral line taking wire, which greatly reduces the volume of the switch without affecting the function of the switch. The electric operating mechanism is provided with a signal terminal 2, and the signal terminal 2 is provided with a control terminal and a feedback terminal, which are respectively connected to the electric energy meter. When in use, the electric energy meter issues a control instruction to control the opening and closing of the switch. The electric operating mechanism 1 is provided with a circuit board to rectify and reduce the voltage of the circuit, thereby providing the working voltage of the motor of the electric operating mechanism.

[0025] As the second embodiment of the present application, a 3P+N structure is adopted: the number of phase poles is 4, namely phase pole 1 3, phase pole 2 4, phase pole 3 5 and phase pole 4 6, and the live wire of the electric operating mechanism is powered by the incoming line terminals of the phase poles 1 3, phase pole 2 4, phase pole 3 5 and phase pole 4 6, and the incoming line terminal and the outgoing line terminal of the phase pole 4 6 are connected without breakpoints. It avoids the abnormal disconnection of the traditional neutral phase pole N or the abnormal disconnection but poor contact, which increases the contact resistance of the N pole and causes the unbalanced three-phase voltage to burn the user's household appliances. The electric operating mechanism 1 is provided with a signal terminal 2, and the signal terminal 2 is provided with two terminals, control and feedback, which are respectively connected to the electric energy meter. When in use, the electric energy meter sends a control instruction to control the opening and closing of the switch. The electric operating mechanism 1 is provided with a circuit board to rectify and reduce the voltage of the circuit, thereby providing the working voltage of the motor of the electric operating mechanism.

[0026] As a structural form of Example 2, Figure 2-Figure 3 As shown, the edges of both ends of the boss of the phase pole four 6 and the edges of the platform are provided with connection terminals, which are connection terminal one 8 to connection terminal four 12, wherein the connection terminal one 8 and the connection terminal four 12 are connected through the copper busbar one 13; the connection terminal two 9 and the connection terminal three 11 are connected through the copper busbar two 14, and the copper busbar one 13 and the copper busbar two 14 are connected through the soft wire 15 by spot welding.

[0027] As another structural form of Example 2, Figure 4-Figure 5 As shown, the two end edges of the platform of the phase pole four 6 are provided with connection terminals, which are the connection terminal five 16 and the connection terminal six 17. The connection terminal five 16 and the connection terminal six 17 are connected by a soft wire 15; the boss of the phase pole four 6 is provided with an arched protrusion.

[0028] The switches of the above two embodiments can be used on current three-phase electric energy meters, realizing remote tripping and closing of the three-phase electric energy meter circuit, thereby achieving remote automatic control of fee control or other needs, and becoming an external intelligent control switch / circuit breaker for large-load three-phase electric energy meters.

[0029] The present invention has been disclosed above with preferred embodiments, but they are not intended to limit the present invention. Any technical solutions obtained by adopting equivalent replacement or equivalent transformation solutions fall within the protection scope of the present invention.

Claims

1. An external switch, characterized in that: It is composed of several module units of the same shape connected together, one of which is an electric operating mechanism and is placed at the end, and the others are phase poles and are arranged in sequence close to the electric operating mechanism. The module unit is square, and one side is composed of a platform and a boss; The number of the phase poles is 4, namely phase pole one, phase pole two, phase pole three and phase pole four. The live wire of the electric operating mechanism is powered by the incoming line terminals of the phase poles one, two, three and four. The incoming line terminal and the outgoing line terminal of the phase pole four are connected without breakpoints. The edges of both ends of the boss of the phase pole four and the edge of the platform are provided with wiring terminals, namely wiring terminals one to wiring terminals four, wherein the wiring terminal one and the wiring terminal four are connected through a copper busbar one; the wiring terminal two and the wiring terminal three are connected through a copper busbar two, and the copper busbar one and the copper busbar two are connected through spot welding of soft wires. A circuit board is provided in the electric operating mechanism.

2. The external switch according to claim 1, characterized in that: The electric operating mechanism is provided with a signal terminal, and the signal terminal is provided with two terminals, a control terminal and a feedback terminal, which are respectively connected to an electric energy meter.

3. The external switch according to claim 1, characterized in that: The two end edges of the phase pole four platform are provided with connection terminals, which are connection terminal five and connection terminal six. The connection terminal five and connection terminal six are connected by a soft wire; the boss of the phase pole four is provided with an arched protrusion.

4. An electric energy meter using the external switch according to any one of claims 1 to 3.

5. A modular metering box using the external switch according to any one of claims 1 to 3.

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