Undervoltage release status monitoring device
A technology of undervoltage release and state monitoring, applied in circuit breaker testing and other directions, can solve problems such as difficulty in analyzing the reasons for circuit breaker opening
Active Publication Date: 2017-04-05
JIANGSU GUOXING ELECTRIC EQUIP +1
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
At this time, the opening of the circuit breaker is not the "undervoltage opening" that is really needed, and because the undervoltage release is embedded in the circuit breaker, it makes it difficult to analyze the cause of the opening of the circuit breaker.
Method used
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[0020] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.
[0021] Such as figure 1 , 2 As shown, the electromagnets of DW450 and DW45 undervoltage releases are respectively composed of a control panel, a front cover 1, a casing 2, a moving iron core 3, a return spring 4 and a coil L1. The tail of the electromagnet is fixed by a pressing plate. The rectified DC voltage HV of the grid voltage is connected to one end of the coil L1, and the other end of the coil L1 is connected to the control output terminal of the control board.
[0022] An undervoltage release state monitoring device of the present invention includes a monitoring circuit, a photoelectric transmitting tube D1 and a photoelectric receiving tube D2, an...
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The invention relates to an undervoltage tripper condition monitoring device which comprises a monitoring circuit, a photoemissive tube and a photoelectric receiving tube, wherein two opposite concave walls are arranged on the inner circle, close to one side of a spring, of a coil, and the photoemissive tube and the photoelectric receiving tube are embedded in the two concave wall positions respectively; the photoemissive tube is connected with a first current-limiting resistor in series and then connected to two ends of the coil in parallel; the monitoring circuit comprises a network voltage detection unit, an output signal of the network voltage detection unit is related with whether the network voltage is undervoltage, and the monitoring circuit outputs a first alarm signal according to the output signal of the network voltage detection unit and the cut-off and connection state of the photoelectric receiving tube and outputs a second alarm signal according to a control output signal of a control panel and the cut-off and connection state of the photoelectric receiving tube. Under the premise that the original functions of the undervoltage tripper are not destroyed, real undervoltage condition and false undervoltage condition can be identified effectively through the simple and cheap additional circuit, and network security operation and undervoltage tripper quality are monitored.
Description
technical field [0001] The invention relates to the field of low-voltage electrical releases, in particular to an undervoltage release state monitoring device. Background technique [0002] The undervoltage release is one of the important components of circuit breakers, especially frame circuit breakers. The undervoltage release is a release that makes the circuit breaker disconnect with or without delay when its terminal voltage drops to a certain range. When the power supply voltage drops, it even slowly drops to the rated working voltage. Within the range of 70% to 35% of the release, the undervoltage release should operate. When the power supply voltage of the undervoltage release is equal to 35% of the rated operating voltage of the release, the undervoltage release should be able to prevent the circuit breaker from fully closing. The coil of the release is de-energized, and the movable armature in the coil is ejected by the return spring—tripping; when the power suppl...
Claims
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IPC IPC(8): G01R31/327
Inventor 吴惠娟蒋文贤李春鸿蒋雷
Owner JIANGSU GUOXING ELECTRIC EQUIP