71ADF30-01-1-AJS

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Rotary Switches: Introduction

A rotary switch is a switch in which the contacts are changed when a rotatable contact, called a rotor or the rotor stem, is turned. When the rotor turns from one position to the other, it breaks the electrical current to one set of contacts and connects it to another, thus changing the electrical circuit. While a single-pole, single-throw (SPST) switch allows for the opening or closing of one circuit, a multiple-pole and/or multiple-throw (MPT) switch can be used for changing more than one power circuit. The most common type of rotary switch is the four-pole, three-position (4P3T) rotary switch, which can define up to four electrical circuits with three different positions.

71ADF30-01-1-AJS Application Field and Working Principle

The 71ADF30-01-1-AJS rotary switch is designed for multiple power switch applications. It uses a four-pole, three-position (4P3T) switch in order to control up to four different power circuits. This design allows for the quick switching of electrical circuits with a simple rotating motion of the switch rotor.

The switch is designed with six terminals: four for each of the four power circuits and two for the common terminal. The common terminal is always connected to one of the four power circuits selected by turning the knob of the switch. The knob of the switch is freely rotating and can be turned from one position to the other without having to operate a locking mechanism. An internal spring mechanism in the switch ensures that the knob returns to the neutral position, when released from its current position. This prevents unwanted activation of power circuits.

This rotary switch is mainly used in the industrial, commercial and residential applications, for example, as a power supply switch for electric motors, heating systems, lighting systems, alarm systems etc. It is highly reliable and comes with a rating of up to 10A at 250V AC or 30V DC. It is also impact-resistant and comes with an IP-66 rating, making it suitable for use in harsh environments.

The rotary switch is constructed from metal and plastic components, including a zinc die-cast base and a metal knob. The base is mounted onto a panel using an array of clamps, which ensure a secure and firm connection. The internal components of the switch are housed in the metal base, and are securely fixed in place. The knob is mounted onto the base, and is connected to the internal mechanisms via a series of metal pins.

The rotary switch works by changing the electrical connection between the four power circuits and the common terminal. Each of the four power circuits is connected to a corresponding contact on the switch. The common terminal is connected to one of the four power circuits via the switch knob. Turning the knob will change the power circuit connected to the common terminal, thus allowing for the selection of the right power circuit. The spring mechanism ensures that the knob always returns to its neutral position when released.

In conclusion, the 71ADF30-01-1-AJS rotary switch is an ideal solution for four power switch applications. It is safe, reliable, and easy to use. Its robust construction makes it suitable for use in harsh environments and its multiple poles and throw configuration makes it suitable for a variety of applications.

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