CN219535621U

CN219535621U - Leakage protection switch

Info

Publication number: CN219535621U
Application number: CN202320528815.1U
Authority: CN
Inventors: 翁大欣; 甘兵
Original assignee: Dongguan Hongao Electronic Technology Co ltd
Current assignee: Dongguan Hongao Electronic Technology Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-08-15
Anticipated expiration: 2033-03-17

Abstract

The utility model relates to the technical field of protection switches, in particular to a leakage protection switch, which comprises a coil L2 sleeved on a three-phase power line, a rectifier bridge D1 for converting alternating current into direct current, a diode Q1 and a Relay Relay1, wherein a pin 1 of the coil L2 is connected with a pin a of the rectifier bridge D1, and a pin 2 of the coil L2 is connected with a pin c of the rectifier bridge D1; in the leakage protection switch, the coil L2 is used for inducing the current of the three-phase power line, the alternating current is converted into direct current in the operation process of the rectifier bridge D1, the Relay1 is additionally arranged, in the use process of the Relay1, the circuit is started and operated in the short circuit process, the circuit is subjected to leakage protection, and the leakage protection switch can be not required to be grounded in the use process of the technical scheme.

Description

Leakage protection switch

Technical Field

The utility model relates to the technical field of protection switches, in particular to a leakage protection switch.

Background

The leakage protector, abbreviated as leakage switch, is mainly used for protecting the life of the equipment from electric shock when the equipment fails and has fatal danger, has overload and short-circuit protection functions, can be used for protecting the overload and short circuit of a circuit or a motor, can also be used for starting the circuit in an infrequent conversion way under normal conditions, and is required to be grounded in the use process of the current leakage protection switch, however, the mode can lead to misoperation of the leakage protector and influence the normal operation of the circuit.

Aiming at the problems exposed in the use process of the current protection switch, the structure of the leakage protection switch is necessary to be improved and optimized.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the leakage protection switch, which has the characteristics of not needing the grounding of the protection switch, effectively avoiding the misoperation of the leakage switch and improving the running stability of a circuit.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a leakage protection switch, includes coil L2 that overlaps on three-phase power cord, is used for turning the alternating current into rectifier bridge D1 of direct current, diode Q1 and Relay Relay1, coil L2's No. 1 pin is connected with rectifier bridge D1's a pin, coil L2's No. 2 pin is connected with rectifier bridge D1's c pin, diode Q1's positive negative pole all is connected with three-phase power cord A, diode Q1's negative pole still is connected with rectifier bridge D1's b pin and D pin;

the a pin and the C pin of the Relay Relay1 are respectively connected with the B phase or the C phase of the three-phase power line.

As a preferable technical scheme of the leakage protection switch, the diode Q1 is provided with an adjustable resistor R1 in parallel.

As an optimal technical scheme of the leakage protection switch, a capacitor C1 is arranged on the coil L2 in parallel, and two ends of the capacitor C1 are respectively connected with an a pin and a C pin.

As a preferable technical scheme of the leakage protection switch, a switch S2 is connected between the positive electrode of the diode Q1 and the d-pin of the Relay Relay 1.

As a preferable technical scheme of the leakage protection switch, the cathode of the diode Q1 is connected with an adjustable resistor R2, and the other end of the adjustable resistor R2 is connected with a pin d of the Relay 1.

As a preferable technical scheme of the leakage protection switch, a capacitor C2 is connected with the cathode of the diode Q1, and the other end of the capacitor C2 is connected with a pin D of the rectifier bridge D1.

As a preferable technical scheme of the leakage protection switch, a coil L1 is connected to the positive electrode of the diode Q1, and the coil L1 is operated to control the switch K1 on the three-phase power line to act so as to form on-off of a circuit.

Compared with the prior art, the utility model has the beneficial effects that:

1. in the leakage protection switch, the coil L2 is used for inducing the current of the three-phase power line, the alternating current is converted into direct current in the operation process of the rectifier bridge D1, the Relay1 is additionally arranged, the Relay1 is started and operated in the short circuit process of the circuit in the use process of the Relay1, and the leakage protection is carried out on the circuit; the variable resistor R1 and the variable resistor R2 carry out overvoltage protection on the circuit, and the capacitor C1 and the capacitor C2 improve the stability of the circuit.

2. When the leakage switch is used, no matter whether the incoming call is connected with the ground wire or not, the leakage switch can play a role in leakage protection, and the circuit can be electrified normally through a power transmission jump mechanism when the incoming call circuit is in fault.

3. When unexpected electric leakage of circuit, for example cable wearing and tearing broken skin, animal stings bad circuit and causes the circuit electric leakage, the earth connection electrified, but the protection of instant outage in order to prevent unexpected emergence of switch, action protection trigger time is short when this technical scheme uses, cut off circuit that can be quick, promotes the security.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Fig. 1 is a schematic circuit structure of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

As shown in fig. 1, the leakage protection switch disclosed by the utility model comprises a coil L2 sleeved on a three-phase power line, a rectifier bridge D1 for converting alternating current into direct current, a diode Q1 and a Relay1, wherein a pin 1 of the coil L2 is connected with a pin a of the rectifier bridge D1, a pin 2 of the coil L2 is connected with a pin c of the rectifier bridge D1, both the positive electrode and the negative electrode of the diode Q1 are connected with a three-phase power line a, and the negative electrode of the diode Q1 is also connected with a pin b and a pin D of the rectifier bridge D1;

the pin a of the Relay Relay1 is connected with the positive electrode of the diode Q1, the pin d of the Relay Relay1 is connected with the negative electrode of the diode Q1, and the pin B and the pin C of the Relay Relay1 are respectively connected with the phase B or the phase C of the three-phase power line.

Specifically, the diode Q1 is provided with an adjustable resistor R1 in parallel, and in this embodiment, the resistance of the adjustable resistor R1 and the resistance of the adjustable resistor R2 are 1K.

Specifically, a capacitor C1 is connected in parallel to the coil L2, two ends of the capacitor C1 are connected with the pin a and the pin C respectively, and in this embodiment, the capacitor C1 adopts 100pF.

Specifically, a switch S2 is connected and arranged between the positive electrode of the diode Q1 and the d-number pin of the Relay Relay1, an adjustable resistor R2 is connected and arranged on the negative electrode of the diode Q1, and the other end of the adjustable resistor R2 is connected with the d-number pin of the Relay Relay 1.

Specifically, a capacitor C2 is connected to the negative electrode of the diode Q1, and the other end of the capacitor C2 is connected to the D pin of the rectifier bridge D1, where in this embodiment, the capacitor C2 uses 100pF.

Specifically, a coil L1 is connected to the positive electrode of the diode Q1, and the coil L1 is controlled to operate by a switch K1 on the three-phase power line during operation of the coil L1, so that the circuit is turned on and off, and in this embodiment, the coil L1 and the switch K1 operate cooperatively.

The working principle and the using flow of the utility model are as follows: in the leakage protection switch, the coil L2 is used for inducing the current of the three-phase power line, the alternating current is converted into direct current in the operation process of the rectifier bridge D1, the Relay1 is additionally arranged, the Relay1 is started and operated in the short circuit process of the circuit in the use process of the Relay1, and the leakage protection is carried out on the circuit; the variable resistor R1 and the variable resistor R2 carry out overvoltage protection on the circuit, and the capacitor C1 and the capacitor C2 improve the stability of the circuit.

The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the present utility model, and all equivalent variations using the description and drawings of the present utility model are within the scope of the present utility model.

Claims

1. A leakage protection switch, characterized by: the three-phase power supply comprises a coil L2 sleeved on a three-phase power supply line, a rectifier bridge D1 for converting alternating current into direct current, a diode Q1 and a Relay Relay1, wherein a pin 1 of the coil L2 is connected with a pin a of the rectifier bridge D1, a pin 2 of the coil L2 is connected with a pin c of the rectifier bridge D1, positive and negative electrodes of the diode Q1 are connected with the three-phase power supply line A, and a negative electrode of the diode Q1 is also connected with a pin b and a pin D of the rectifier bridge D1;

2. A leakage protection switch according to claim 1, wherein: an adjustable resistor R1 is arranged on the diode Q1 in parallel.

3. A leakage protection switch according to claim 2, characterized in that: and a capacitor C1 is arranged on the coil L2 in parallel, and two ends of the capacitor C1 are respectively connected with an a-pin and a C-pin.

4. A leakage protection switch according to claim 2, characterized in that: a switch S2 is connected between the positive electrode of the diode Q1 and the d-pin of the Relay Relay 1.

5. The leakage protection switch of claim 4, wherein: the negative electrode of the diode Q1 is connected with an adjustable resistor R2, and the other end of the adjustable resistor R2 is connected with a pin d of the Relay 1.

6. A leakage protection switch according to claim 2, characterized in that: the negative electrode of the diode Q1 is connected with a capacitor C2, and the other end of the capacitor C2 is connected with a pin D of the rectifier bridge D1.

7. A leakage protection switch according to claim 2, characterized in that: the positive electrode of the diode Q1 is connected with a coil L1, and the coil L1 is controlled to operate by a switch K1 on a three-phase power line during operation, so that a circuit is turned on and off.