Interruptor de botón de presión para arrancadores y contactores de motor
A push button motor starter switch is usually an operator in the starter's control circuit, not the device that carries motor current. In a common three-wire control arrangement, a momentary Start button energizes a starter coil and an auxiliary contact maintains the command; a Stop button interrupts the control path. The motor power contacts belong to the motor starter. Select the pushbutton by its operator, contact function, electrical duty, control voltage and required sequence, then confirm the exact product documentation and machine design. LEMA PBS push-button examples based on an original product-library image. The photograph identifies the product family; it does not specify contact function, rating or starter compatibility. Separate the operator, control circuit and motor power circuit A starter system has several different parts that are often all called a “starter switch.” The front pushbutton is the operator a person presses. Its contact set changes an electrical control signal. A relay or magnetic starter coil receives that control signal and changes the state of the starter's power contacts. Those power contacts connect or disconnect the motor circuit under the starter's design and ratings. An overload device, short-circuit protection, disconnect and enclosure have their own roles. This distinction matters when purchasing. A panel-mount pushbutton may be suitable for a low-energy PLC input or a control-circuit path but not for switching motor current directly. A manual motor starter is a different assembly that can include a switching mechanism and overload protection. Do not treat an operator button, contact block, contactor or manual starter as interchangeable simply because each can be described with the words “push button” or “switch.” The BCcampus Basic Motor Control chapter describes pushbuttons as momentary contacts used in...
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