water resistance starter

Abstract

The invention discloses a water-resistor starting device, and belongs to the technical field of water-resistor starting devices. A to-be-solved technical problem is to provide the water-resistor starting device which is simple in structure, is low in cost and can achieve the soft start of a motor. A technical scheme for solving the technical problem is that one end of a stop button TA is in seriesconnection with a fuse RT1, and then is connected with a power live wire end L of a control circuit; the other end of the stop button TA is sequentially in series connection with a normally-opened contact SZK1.1, a coil YC1.1, a normally-closed contact RJ1.2 and a fuse RT2, and then is connected with a power zero line end N of the control circuit; a start button QA is connected with two ends of the normally-opened contact SZK1.1 in a parallel manner, and the normally-closed contact RJ1.2 is connected with two ends of the normally-opened contact SZK1.1 in a parallel manner; an indicating lampXHD1 is connected with two ends of the coil YC1.1 in a parallel manner; a water-resistor control box SZK1 is filled with water, and the distance between a polar plate at an input end and a polar plateat an output end can be controlled by a water-resistor control motor D2. The device is used for a place where a motor is installed.

Description

technical field [0001] The water resistance starting device of the invention belongs to the technical field of water resistance starting devices. Background technique [0002] At present, the three-phase AC motors currently used are connected to the main circuit of the motor by controlling the contactor to close when starting. Since the connection depends on the opening and closing of the contactor, the current value of the motor increases sharply after the power is turned on, so the hard-start motor may be damaged. cause damage to it and reduce the service life; the current common practice is to install soft-start equipment in the motor starting circuit to gradually increase or decrease the starting current. The circuit structure to realize soft-start is usually more complex and functional Large consumption, instability and high cost, it is difficult to promote in the place where the motor is started. Contents of the invention [0003] The present invention overcomes the...

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Problems solved by technology

[0002] At present, the three-phase AC motors currently used are connected to the main circuit of the motor by controlling the contactor to close when starting. Since the connection depends on the opening and closing of the contactor, the current value of the motor increases sharply after the power is turned on, so the hard-start motor may be damaged. cause damage to it and reduce the service life; the current common practice is to install soft-start equipment in the motor starting circuit to gradually increase or decrease the starting current. The circuit structure to realize soft-start is usually more complex and functional Large power consumption, instability and high cost, it is difficult to promote in the place where the motor starts

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