CN211376531U

CN211376531U - Electronic type thermal relay contact expanding unit

Info

Publication number: CN211376531U
Application number: CN202020138084.6U
Authority: CN
Inventors: 徐君芳; 柏华东; 杨军
Original assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Current assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-08-28
Anticipated expiration: 2030-01-21

Abstract

The utility model discloses an electronic type thermal relay contact extension device, including relay K1, live wire L and zero line N, 10 pins and rectifier bridge circuit electric connection of relay K1, rectifier bridge circuit and external contact circuit electric connection, relay K1's 11 pins and live wire L electric connection, rectifier bridge circuit's power input end and zero line N electric connection. The utility model overcomes the traditional relay that exists among the prior art only leads to it can't provide the problem that the warning output signal is used for reflecting overload trip protection. The utility model has the advantages of simple structure, clear function, simple assembly, low cost and the like.

Description

Electronic type thermal relay contact expanding unit

Technical Field

The utility model relates to a contact signal field, more specifically say, relate to an electronic type thermal relay contact extension device.

Background

With the development of power systems, the number of sets of contact signals of electronic thermal relays is increasingly required. At present, the traditional electronic overload relay only has one group of contacts which are connected in series into a control coil loop of an alternating current contactor, and when a fault occurs, the control coil circuit of the alternating current contactor is cut off through an output interface, so that the contactor is disconnected, and a motor is protected. However, only one set of contact signals cannot provide an alarm output signal to reflect that the trip protection is overloaded, so that serious consequences such as damage of the motor cannot be found in time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the traditional relay that exists among the prior art and only lead to its unable alarm output signal that provides to be used for reflecting the problem of overload trip protection, provide an electronic type thermal relay contact extension fixture that has multiunit contact signal now.

The utility model discloses an electronic type thermal relay contact extension device, including relay K1, live wire L and zero line N, 10 pins and rectifier bridge circuit electric connection of relay K1, rectifier bridge circuit and external contact circuit electric connection, relay K1's 11 pins and live wire L electric connection, rectifier bridge circuit's power input end and zero line N electric connection.

Preferably, the 1 pin and the 4 pins of the relay K1 are a group of normally open output contacts, the 2 pin and the 8 pins of the relay K1 are a group of normally closed output contacts, and the 3 pin and the 9 pin of the relay K1 are another group of normally closed output contacts.

Preferably, the rectifier bridge circuit comprises a rectifier bridge D1, a thyristor V1, a diode V2, a resistor R3 and a capacitor C1, a pin 1 of the rectifier bridge D1 is electrically connected with a pin 10 of a relay K1, a pin 2 of the rectifier bridge D1 is electrically connected with an anode of the thyristor V1 and one end of the resistor R3 respectively, a pin 3 of the rectifier bridge D1 is electrically connected with a neutral line N, a pin 4 of the rectifier bridge D1 is electrically connected with one end of the capacitor C1 and a cathode of the diode V2 respectively and is grounded, a cathode of the thyristor V1 is electrically connected with an anode of the diode V2, and the other end of the resistor R3 is electrically connected with the other end of the capacitor C1.

Preferably, the external contact circuit includes normally closed contact 1, normally closed contact 2, normally open contact 1, normally open contact 2, resistance R1 and resistance R2, resistance R1's one end and rectifier bridge D1's 2 pin electric connection, resistance R1's the other end, normally closed contact 1 and normally open contact 1 respectively with resistance R2's one end electric connection, resistance R2's the other end and silicon controlled rectifier V1's negative pole electric connection, normally closed contact 2 and normally open contact 2 ground connection respectively.

The utility model discloses an increase the theory of operation of a set of contact and be: two groups of contact signals are output through the relay K1, when AC220V voltage is added to the two ends of the rectifier bridge D1, the thyristor V1 is not conducted because the gate level of the thyristor V1 does not trigger a conducting signal, a coil of the relay K1 is not attracted, and two groups of conversion contacts are still at the original positions. When the motor is overloaded, the circuit can send out a trigger signal on a trigger pin of the controllable silicon V1, so that the controllable silicon V1 is switched on to form self-locking, the relay K1 is attracted to enable the positions of two contacts to be reversed, the controllable silicon V1 is manually turned off to be in a conducting state, otherwise, the controllable silicon V1 is always conducted, namely, the relay is attracted all the time, the positions of the two contacts are reversed all the time, and therefore a group of contact signals is added.

When the input signal is normally closed input or normally open input, one end of the input signal is connected to the rectifier bridge D1 through the resistor R1, and the control stage of the controllable silicon V1 is connected through the resistor R2. The anode of the controlled silicon is connected to the anode of the rectifier bridge D1 and is connected to the capacitor C1 through the resistor R3, the cathode of the controlled silicon is connected to the other end of the anode input contact of the diode V2, the negative of the diode V2, the other end of the capacitor C1, and one end of the cathode of the rectifier bridge is grounded. The relay K1 is a signal with three groups of contacts, one end of a coil of the relay is connected to the AC220V voltage, the other end of the relay is connected to an AC input power supply end of a rectifier bridge D1, and the other AC input power supply end of the rectifier bridge is connected to the AC220V voltage.

The utility model discloses following beneficial effect has: simple structure, clear function, simple assembly and low cost.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Fig. 2 is a schematic diagram of a relay K1 according to the present invention.

Fig. 3 is a schematic diagram of a rectifier bridge circuit according to the present invention.

Fig. 4 is a schematic diagram of an external contact circuit according to the present invention.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): according to attached figure 1, attached figure 2, attached figure 3 and attached figure 4 to explain further the utility model discloses an electronic type thermal relay contact extension device of this example, including relay K1, live wire L and zero line N, relay K1's 10 pins and rectifier bridge circuit electric connection, rectifier bridge circuit and external contact circuit electric connection, relay K1's 11 pins and live wire L electric connection, rectifier bridge circuit's power input end and zero line N electric connection.

The device comprises a relay K1, a relay K1, a relay K1 and a relay K1, wherein a pin 1 and a pin 4 of the relay K1 are a group of normally open output contacts, a pin 2 and a pin 8 of the relay K1 are a group of normally closed output contacts, and a pin 3 and a pin 9 of the relay K1 are another group of normally closed output contacts.

The rectifier bridge circuit comprises a rectifier bridge D1, a controlled silicon V1, a diode V2, a resistor R3 and a capacitor C1, wherein a pin 1 of the rectifier bridge D1 is electrically connected with a pin 10 of a relay K1, a pin 2 of the rectifier bridge D1 is electrically connected with the positive electrode of the controlled silicon V1 and one end of the resistor R3 respectively, a pin 3 of the rectifier bridge D1 is electrically connected with a zero line N, a pin 4 of the rectifier bridge D1 is electrically connected with one end of the capacitor C1 and the negative electrode of the diode V2 respectively and is grounded, the negative electrode of the controlled silicon V1 is electrically connected with the positive electrode of the diode V2, and the other end of the resistor R3 is electrically connected with the other end of the capacitor C1.

External contact circuit include normally closed contact 1, normally closed contact 2, normally open contact 1, normally open contact 2, resistance R1 and resistance R2, resistance R1's one end and rectifier bridge D1's 2 pin electric connection, resistance R1's the other end, normally closed contact 1 and normally open contact 1 respectively with resistance R2's one end electric connection, resistance R2's the other end and silicon controlled V1's negative pole electric connection, normally closed contact 2 and normally open contact 2 ground connection respectively.

The above description is only for the specific embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.

Claims

1. The utility model provides an electronic type thermal relay contact extension device, includes relay K1, live wire L and zero line N, characterized by, relay K1 10 pins and rectifier bridge circuit electric connection, rectifier bridge circuit and external contact circuit electric connection, relay K1 11 pins and live wire L electric connection, rectifier bridge circuit's power input end and zero line N electric connection.

2. The electronic thermal relay contact expansion device as claimed in claim 1, wherein pins 1 and 4 of the relay K1 are a set of normally open output contacts, pins 2 and 8 of the relay K1 are a set of normally closed output contacts, and pins 3 and 9 of the relay K1 are another set of normally closed output contacts.

3. The electronic thermal relay contact expansion device of claim 1, wherein the rectifier bridge circuit comprises a rectifier bridge D1, a thyristor V1, a diode V2, a resistor R3 and a capacitor C1, wherein pin 1 of the rectifier bridge D1 is electrically connected with pin 10 of a relay K1, pin 2 of the rectifier bridge D1 is electrically connected with the positive electrode of the thyristor V1 and one end of the resistor R3 respectively, pin 3 of the rectifier bridge D1 is electrically connected with a neutral line N, pin 4 of the rectifier bridge D1 is electrically connected with one end of the capacitor C1 and the negative electrode of the diode V2 and is grounded, the negative electrode of the thyristor V1 is electrically connected with the positive electrode of the diode V2, and the other end of the resistor R3 is electrically connected with the other end of the capacitor C1 respectively.

4. The electronic thermal relay contact expansion device of claim 3, wherein the external contact circuit comprises a normally closed contact 1, a normally closed contact 2, a normally open contact 1, a normally open contact 2, a resistor R1 and a resistor R2, one end of the resistor R1 is electrically connected with pin 2 of the rectifier bridge D1, the other end of the resistor R1, the normally closed contact 1 and the normally open contact 1 are respectively electrically connected with one end of the resistor R2, the other end of the resistor R2 is electrically connected with the negative electrode of the thyristor V1, and the normally closed contact 2 and the normally open contact 2 are respectively grounded.