CB undervoltage tripping device

Abstract

The invention relates to a CB undervoltage tripping device which is installed in a mechanism box of CB equipment, and the CB undervoltage tripping device comprises an undervoltage tripping electromagnet and a controller. The controller is connected with a controller power supply of the CB equipment, the controller power supply supplies power to the controller, the controller is connected with the undervoltage tripping electromagnet and controls the attraction and release of the undervoltage tripping electromagnet, and the opening operation of an operating mechanism of the CB equipment is realized through the action of the undervoltage tripping electromagnet. The under-voltage tripping device is composed of the under-voltage tripping electromagnet and the controller, the under-voltage tripping device is installed in the CB mechanism box, the control power source is connected with the controller, the controller controls attraction and release of the under-voltage tripping electromagnet, and therefore the opening operation of the spring mechanism is controlled, the product performance is stable, the mechanical service life reaches more than 10000 times, and the service life is long. Through the device, opening and tripping are accurately controlled, and the reliability of product operation is improved.

Description

Technical Field

[0001] The invention relates to the field of circuit breakers, and in particular to a CB undervoltage tripping device. Background Art

[0002] CB (Circuit Breaker) is a circuit breaker or circuit breaker switch, which is an electrical device used to control and protect electrical appliances in a circuit. It can automatically disconnect the power supply when the circuit is overloaded, short-circuited or grounded to avoid fire or other safety accidents.

[0003] The undervoltage release has protection functions such as overload, circuit breaker, leakage, undervoltage, overvoltage, unbalance, underfrequency, overfrequency, reverse power, phase sequence, etc. It also has functions such as load monitoring, real-time value measurement, demand measurement, harmonic measurement, meter setting, maintenance, communication, DI / DO, area selective interlocking, test interlocking, LCD interface display, etc. The undervoltage release is combined with the switching electrical appliance. When the external applied voltage drops, even slowly drops to the range of 70% to 35% of the rated voltage, the undervoltage relay and release combined with the switching electrical appliance should operate to disconnect the electrical appliance.

[0004] At present, most of the existing undervoltage releasers used in CB equipment are installed outside the CB mechanism box. When cooperating with the CB mechanism to achieve the opening tripping, the opening tripping cannot be well controlled, which leads to instability during product operation. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a CB undervoltage tripping device which can accurately control the opening tripping and improve the product operation reliability.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a CB undervoltage tripping device, the innovation of which is: the CB undervoltage tripping device is installed in a mechanism box of a CB device, and the CB undervoltage tripping device includes an undervoltage tripping electromagnet and a controller; The controller is connected to the controller power supply of the CB device and is powered by the controller power supply. The controller is connected to the undervoltage tripping electromagnet and controls the attraction and release of the undervoltage tripping electromagnet, and realizes the opening operation of the operating mechanism of the CB device through the action of the undervoltage tripping electromagnet.

[0007] Furthermore, the CB undervoltage release device is connected to the closing circuit of the CB equipment; A relay JDQ and a travel switch SP33 are connected in series in sequence on the closing circuit, and the travel switch SP33 has a normally open contact and a normally closed contact; The CB undervoltage tripping device also includes a local control circuit and a remote control circuit. The undervoltage tripping electromagnet is connected in series to the local control circuit, and the undervoltage tripping coil QTQ of the undervoltage tripping electromagnet is connected in series to the travel switch SP33. The safety battery terminal SBT2 and the test button SB5 are also connected in series to the local control circuit in sequence. One side of the remote control circuit is connected in parallel to the local control circuit, and the connection point of the remote control circuit and the local control circuit is located between the undervoltage tripping electromagnet and the safety battery terminal SBT2. The safety battery terminal SBT2 has a normally open contact and a normally closed contact, wherein the normally open contact of the safety battery terminal SBT2 is connected to the local control circuit, and the normally closed contact of the safety battery terminal SBT2 is connected to the remote control circuit.

[0008] The advantages of the present invention are as follows: the undervoltage release of the present invention is composed of an undervoltage release electromagnet and a controller, the undervoltage release device is installed in a CB mechanism box, the control power supply is connected to the controller, the controller controls the attraction and release of the undervoltage release electromagnet, thereby controlling the opening operation of the spring mechanism, the product performance is stable, the mechanical life is more than 10,000 times, the opening release is accurately controlled by the device, and the reliability of product operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the CB undervoltage tripping device of the present invention. DETAILED DESCRIPTION

[0010] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0011] like Figure 1 A CB undervoltage release device is shown, which is installed in a mechanism box of a CB device and includes an undervoltage release electromagnet and a controller.

[0012] The controller is connected to the controller power supply of the CB device and is powered by the controller power supply. The controller is connected to the undervoltage release electromagnet and controls the attraction and release of the undervoltage release electromagnet. The opening operation of the operating mechanism of the CB device is realized through the action of the undervoltage release electromagnet.

[0013] The CB undervoltage release device is connected to the closing circuit 1 of the CB equipment.

[0014] Relay JDQ and travel switch SP33 are connected in series in sequence on the closing circuit 1. The travel switch SP33 has a normally open contact and a normally closed contact.

[0015] The CB undervoltage tripping device also includes a local control circuit 2 and a remote control circuit 3. The undervoltage tripping electromagnet is connected in series to the local control circuit 2, and the undervoltage tripping coil QTQ of the undervoltage tripping electromagnet is connected in series to the travel switch SP33. The safety battery terminal SBT2 and the test button SB5 are also connected in series to the local control circuit 2 in sequence. One side of the remote control circuit 3 is connected in parallel to the local control circuit 2, and the connection point of the remote control circuit 3 and the local control circuit 2 is located between the undervoltage tripping electromagnet and the safety battery terminal SBT2.

[0016] The safety battery terminal SBT2 has a normally open contact and a normally closed contact, wherein the normally open contact of the safety battery terminal SBT2 is connected to the local control circuit 2 , and the normally closed contact of the safety battery terminal SBT2 is connected to the remote control circuit 3 .

[0017] Figure 1 The figure shows the closing circuit 1, which is a status indication diagram of the relay JDQ being energized and attracted under normal voltage conditions. The figure shows that the undervoltage trip coil QTQ is not energized, and the normally closed contact of the travel switch SP33 connected in series in the closing circuit is open. Under normal voltage conditions, the coil QTQ is energized, and the travel switch SP33 returns to the normally closed contact. During close control, when the voltage is undervoltage, the SB5 test button is pressed, QTQ loses power, and the product in the closed state can be opened.

[0018] The undervoltage release of the present invention is composed of an undervoltage release electromagnet and a controller. The undervoltage release device is installed in a CB mechanism box, and a control power supply is connected to the controller. The controller controls the attraction and release of the undervoltage release electromagnet, thereby controlling the opening operation of the spring mechanism. The product has stable performance and a mechanical life of more than 10,000 times. The opening release is accurately controlled by the device, thereby improving the reliability of product operation.

[0019] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A CB undervoltage tripping device, characterized in that: The CB undervoltage tripping device is installed in the mechanism box of the CB equipment, and the CB undervoltage tripping device includes an undervoltage tripping electromagnet and a controller; The controller is connected to the controller power supply of the CB device and is powered by the controller power supply. The controller is connected to the undervoltage tripping electromagnet and controls the attraction and release of the undervoltage tripping electromagnet, and realizes the opening operation of the operating mechanism of the CB device through the action of the undervoltage tripping electromagnet.

2. The CB undervoltage tripping device according to claim 1, characterized in that: The CB undervoltage release device is connected to the closing circuit of the CB equipment; A relay JDQ and a travel switch SP33 are connected in series in sequence on the closing circuit, and the travel switch SP33 has a normally open contact and a normally closed contact; The CB undervoltage tripping device also includes a local control circuit and a remote control circuit. The undervoltage tripping electromagnet is connected in series to the local control circuit, and the undervoltage tripping coil QTQ of the undervoltage tripping electromagnet is connected in series to the travel switch SP33. The safety battery terminal SBT2 and the test button SB5 are also connected in series to the local control circuit in sequence. One side of the remote control circuit is connected in parallel to the local control circuit, and the connection point of the remote control circuit and the local control circuit is located between the undervoltage tripping electromagnet and the safety battery terminal SBT2. The safety battery terminal SBT2 has a normally open contact and a normally closed contact, wherein the normally open contact of the safety battery terminal SBT2 is connected to the local control circuit, and the normally closed contact of the safety battery terminal SBT2 is connected to the remote control circuit.

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