Push button switch, Appearance, structure parameters and install and use

Push button switch, Text symbols SB) Button switch: a short circuit on or off small current electric equipment, it is not direct control of main circuit on and off, and issued a manual 'instructions' in the control circuit to control the contactor, relay and other appliances, again by them to control the main circuit, therefore calls 'the Lord makes appliances'. The appearance of the push button switch 1. The structure of the push button switch button switch structure: by the button cap, reset spring, fixed contact and moving contact, shell and pillar connecting rod, etc. Normally open contacts ( Dynamic contact) : refer to the original state, Appliances not by force or coil not electricity) The fixed contact and moving contact contact in a separate state. Normally closed contacts ( Dynamic contact) : refer to the original state, Appliances not by force or coil not electricity) , fixed contact and moving contact in the closed state of the contact. Normally open ( Move together) Push button switch, the press, the contactor is disconnected, when press the contact closure through; After the release, under the action of the reset spring reset button switch off. Commonly used in the control circuit, normally open button to start the motor, also calls the start button. Normally closed ( Dynamic fault) At the end of the push button switch, in contrast to the normally open push button switch, press, the contactor is closed, when press the contactor disconnect; When the hand, under the action of the reset spring reset button switch closure. Normally closed button parking is often used to control motor, also calls the stop button. Composite button switch: will normally open and normally closed switch button combination as one of the push button switch, which is normally closed contacts and normally open contacts. Not press, the normally closed contact is closed, normally open contacts is disconnected. Press the button, the normally closed contact first disconnect, normally open contacts after closing; After the release, push button switch under the action of the reset spring, first will normally open contacts disconnect, which in turn will normally closed contacts closed. In composite button to interlock control circuit. Push button switch button switch appearance structure schematic button switch symbol composite button action state 2. Push button switch model significance: 3. Button to switch the main technical parameters of the commonly used push button switch of the main technical parameters are shown in table. Commonly used as the main technical parameters of the push button switch, 4. Installation and use of push button switch ( 1) When install the button on the panel, should decorate, reasonable arrangement, according to the order of motor start, from top to bottom or from left to right: ( 2) Button fixed installation shall be firm and wiring should be reliable. Application of red button says stop, green or black start or electricity, said don't make a mistake. ( 3) Because the button to contact the distance between the smaller, such as such as oil prone to short-circuit fault, therefore should maintain contact cleaning. ( 4) Install button button and button box must be metal, and try to make them connected to total grounding bus bar machine, for hanging button must be equipped with special grounding line, may not use metal tube as the ground. ( 5) Button is used for high temperature, easy to loosen plastic deformation caused by aging, and cause the connection between the screw touching short circuit, can add in the binding screw set of insulation plastic pipe to prevent short circuit. ( 6) Button for the light bulb fever with pilot light indication, use for a long time easy to make plastic deformation lampshade, lamp voltage shall be reduced, prolong service life. ( 7) 'Stop' button must be red; 'Stop' button must be red mushroom head type; 'Start' button must have a protective collar, protective collar should be higher than the button head, to prevent accidental touches make electrical equipment misoperation.