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Over/under voltage protector

An over-under-voltage and protector technology, which is applied in the protection of over-voltage response, under-voltage or no-voltage response protection, electrical components, etc., can solve the problem of high accident rate, thick copper wire and large size and other problems, to achieve the effects of high safety, reduced usage, and simple structure

Inactive Publication Date: 2013-11-27
薛小平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned protector generally only disconnects the phase line for protection when protecting the load or line, and keeps the neutral line, so it is reasonable to set an input terminal and an output terminal for the phase line, and the input and output terminals of the neutral line are inside the protector It is directly short-circuited with current-carrying wires, and the terminal must meet the ability to connect to the wire that can carry the rated load current. This design has the following disadvantages: First, the neutral wire terminal is large in size to meet the rated load. The short-connected copper wire is relatively thick, and sufficient electrical clearance and creepage distance should be left in the design to ensure electrical safety, which makes the protector larger in size (generally 54mm or 45mm in width) and complex in structure, which increases protection The manufacturing cost of the device; second, the zero line terminal carries a large current, the copper wire diameter of the external connection is large, the number of terminals is large, and the inevitable accident rate is high; third, if the protector is installed in the distribution box , it is necessary to lead a large-diameter copper wire from the input terminal of the neutral line of the distribution box to the input terminal of the protector, and then connect a large-diameter wire to the next-level protective device (usually a leakage protector) at the output end of the protector ) connected to the zero line terminal block, and the size of the protector itself is large, so when making a distribution box, copper wires will inevitably be wasted, and the volume of the distribution box is relatively large

Method used

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Examples

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Embodiment 1

[0014] Embodiment 1: with reference to attached Figure 1~3 , is a structural schematic diagram of Embodiment 1 of the present invention, which is an embodiment of a single-phase overvoltage protector, including a box body 2 and a circuit board component 3, and there are three connection terminals on the box body 1, one of which is zero Wire terminal 1, its wiring capacity meets 1.5㎜ 2 The other two form a pair, which is the phase wire terminal 4, and its wiring capacity can meet the requirements of 35㎜ 2 In the protector, the zero line N terminal is directly connected to the circuit board part 3 of the protector, and the phase line L end of the circuit board part 3 is directly connected to the phase line terminal 4 of the protector; the width of the protector is 27 mm, when When the protector is installed in the distribution box, the neutral line terminal 1 is connected to the input neutral line terminal block in the distribution box or the neutral line terminal block connec...

Embodiment 2

[0015] Embodiment 2: refer to Figure 4 , which is a schematic diagram of the circuit of Embodiment 3 of the present invention, which is an embodiment of a three-phase overvoltage and undervoltage protector. There are seven connection terminals on the box body 2, one of which is a zero line connection terminal 1, and its connection capacity meets 1.5㎜ 2 The other 6 wires form 3 pairs, which are the phase wire terminal 4, and its wiring capacity can meet the requirements of 35㎜ 2 The neutral wire terminal inside the protector is directly connected to the circuit board part 3 of the protector, and the phase line end of the circuit board part 3 is directly connected to one phase, or two phases, or three-phase input or output wiring of the protector Terminals; the width of the protector is 108㎜. When the protector is installed in the distribution box, the neutral line terminal 1 is connected to the input neutral line terminal block in the distribution box or the neutral line conn...

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Abstract

The invention discloses a self-restoring type over / under-voltage protector, which comprises a box body (2) and a protector circuit (3). The protector circuit (3) is provided with a voltage value reading end. Improvements are as follows: the box body is only provided with three wiring terminals, one pair of wiring terminals comprise a live wire access end (5) and a live wire leading-out end (4), the protector circuit (3) is used for controlling disconnection or connection of the live wire access end (5) and the live wire leading-out end (4), the other wiring terminal is a zero wire access end (1), the zero wire access end (1) is connected with the voltage value reading end of the protector circuit (3), and the specifications of the zero wire access end (1) are the same as or lower than the specifications of the live wire access end (5) and the live wire leading-out end (4). Compared with the prior art, the self-restoring type over / under-voltage protector has a simple structure, the comprehensive cost of the protector can be reduced to a large extent, and the reliability of the protector can be improved to a large extent. Particularly, the size of the protector can be reduced to a large extent, and the size of a power distribution box can be reduced to a large extent when the protector is used in the power distribution box.

Description

technical field [0001] The invention relates to a circuit protector, in particular to an overvoltage and undervoltage protector. Background technique [0002] Current circuit protectors, such as single-phase overvoltage and undervoltage protectors, generally have four terminals on the box body, two of which are input terminals for phase line and neutral line, and the other two terminals are Phase line and neutral line output terminals, these four terminals are not only used to carry tens of amperes or even hundreds of amperes of load current, but also the input terminals are connected with the circuit board components of the protector to provide power for the circuit board components. [0003] The above-mentioned protector generally only disconnects the phase line for protection when protecting the load or line, and keeps the neutral line, so it is reasonable to set an input terminal and an output terminal for the phase line, and the input and output terminals of the neutral...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/20H02H3/24H02G3/08
Inventor 王志平
Owner 薛小平