Anti-electric shock connector applied to photovoltaic inverter

Abstract

The utility model discloses an anti-electric shock joint applied to a photovoltaic inverter, comprising a wiring terminal head, the wiring terminal head is respectively provided with a PE pin, an L pin and an N pin, and the wiring terminal head is provided with two groups of short circuit probes at the lower middle part between the L pin and the N pin. And the two groups of short-circuit probes are connected with a short-circuit signal detection circuit. And when a matched female head socket is not inserted, the inverter does not supply power, so that an electric shock accident possibly caused by electrification of a contact pin is avoided. And intelligent control: automatic power supply control of the inverter is realized by detecting a low-level signal of a short-circuit pin, and the operation process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic inverters, and more specifically, to an anti-electric shock connector applied to a photovoltaic inverter. Background Art

[0002] In a photovoltaic system, the role of an inverter is crucial. It converts the direct current generated by photovoltaic panels into alternating current to supply loads. However, traditional inverter sockets have certain potential safety hazards. Especially when no load is plugged in, the pins may be charged, increasing the risk of electric shock.

[0003] Regarding the problems in the related art, no effective solution has been proposed yet. Summary of the Utility Model

[0004] Regarding the problems in the related art, the utility model proposes an anti-electric shock connector applied to a photovoltaic inverter to overcome the above-mentioned technical problems existing in the existing related art.

[0005] For this purpose, the specific technical solution adopted by the utility model is as follows:

[0006] An anti-electric shock connector applied to a photovoltaic inverter includes a wiring terminal head. The wiring terminal head is respectively provided with a PE pin, an L pin, and an N pin. Two groups of short-circuit probes are provided in the middle below between the L pin and the N pin of the wiring terminal head. The two groups of short-circuit probes are connected to a short-circuit signal detection circuit.

[0007] Optionally, the short-circuit signal detection circuit includes a resistor R8 and a ZERO signal.

[0008] Optionally, one end of the resistor R8 is respectively connected to the ZERO signal and one of the short-circuit probes, and the other end of the resistor R8 is connected to a supply voltage VCC.

[0009] Optionally, the other short-circuit probe is grounded.

[0010] The beneficial effects of the utility model are as follows: improved safety: when the matching female socket is not plugged in, the inverter will not supply power, thus avoiding electric shock accidents that may be caused by charged pins.

[0011] Intelligent control: by detecting the low-level signal of the short-circuit pin, automatic power supply control of the inverter is realized, simplifying the operation process. Description of the Drawings

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 FIG. Figure 1 is a schematic structural diagram of an anti-electric shock connector applied to a photovoltaic inverter according to an embodiment of the present invention;

[0014] Figure 2 FIG. Figure 2 is a side view of an anti-electric shock connector applied to a photovoltaic inverter according to an embodiment of the present invention;

[0015] Figure 3 FIG. Figure 3 is a circuit diagram of a short-circuit signal detection circuit in an anti-electric shock connector applied to a photovoltaic inverter according to an embodiment of the present invention.

[0016] In the figures:

[0017] 1. Terminal head; 2. PE pin; 3. L pin; 4. N pin; 5. Short-circuit probe. Detailed implementation manners

[0018] To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, an anti-electric shock connector applied to a photovoltaic inverter is provided.

[0020] Embodiment 1;

[0021] As Figures 1 - 3 shown, the anti-electric shock connector applied to a photovoltaic inverter according to an embodiment of the present invention includes a terminal head 1. The terminal head 1 is respectively provided with a PE pin 2, an L pin 3, and an N pin 4. Two groups of short-circuit probes 5 are provided in the middle below between the L pin 3 and the N pin 4 of the terminal head 1. The two groups of short-circuit probes 5 are connected to a short-circuit signal detection circuit.

[0022] Embodiment 2;

[0023] As Figures 1 - 3As shown, the short-circuit signal detection circuit includes a resistor R8 and a ZERO signal. One end of the resistor R8 is connected to the ZERO signal and one of the short-circuit probes 5 respectively. The other end of the resistor R8 is connected to a supply voltage VCC, and the other short-circuit probe 5 is grounded.

[0024] To facilitate the understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process will be described in detail below.

[0025] In actual application, after the plug is inserted into the socket, the ZERO signal of the short-circuit probe 5 is forced to be pulled low. The inverter detects that the ZERO signal is at a low level, and at this time the inverter starts to invert and output. After the socket is unplugged, the ZREO signal returns to a high level, the inverted output stops, and there is no voltage on the pin, realizing that when the matching female socket is not inserted, the inverter will not supply power, thus avoiding the electric shock accident that may be caused by the live pin.

[0026] In summary, with the above technical solutions of the present invention, the safety is improved: when the matching female socket is not inserted, the inverter will not supply power, thus avoiding the electric shock accident that may be caused by the live pin. Intelligent control: By detecting the low-level signal of the short-circuit pin, the automatic power supply control of the inverter is realized, and the operation process is simplified.

[0027] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-electric shock joint applied to a photovoltaic inverter, comprising a terminal head (1), characterized in that, The wiring terminal head (1) is respectively provided with a PE pin (2), an L pin (3) and an N pin (4). In the middle below between the L pin (3) and the N pin (4) of the wiring terminal head (1), two groups of short - circuit probes (5) are provided, and the two groups of short - circuit probes (5) are connected with a short - circuit signal detection circuit.

2. The anti-electric shock connector applied to a photovoltaic inverter according to claim 1, characterized in that, The short - circuit signal detection circuit includes a resistor R8 and a ZERO signal.

3. The anti-electric shock connector applied to a photovoltaic inverter according to claim 2, wherein One end of the resistor R8 is respectively connected with the ZERO signal and one of the short - circuit probes (5), and the other end of the resistor R8 is connected with a supply voltage VCC.

4. The anti-electric shock connector applied to a photovoltaic inverter according to claim 3, characterized in that, The other short - circuit probe (5) is grounded.

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