55A1122-20-2/29-9

The 55A1122-20-2/29-9 is an industrial grade combination switch and motor starter that can be used in a variety of applications. It is designed to provide reliable and safe control of motors by providing a means of disconnecting power to a motor and by providing protection against motor over-loads.

Applications

The 55A1122-20-2/29-9 is typically used in motor control applications such as pumping systems, HVAC systems, and other industrial machine tools. It is designed to control and monitor the current used by an electric motor, and to automatically shut off the motor when it draws more current than its rated capacity. This feature ensures the safety of operators and prevents damage to electric motors. The switch is also suitable for controlling three-phase ac motors with voltage ratings up to 600 volts.

Working Principle

The 55A1122-20-2/29-9 utilizes a combination of standard switch contacts and a motor overload protection system. The current draw of the motor is monitored, and when the motor draws more current than its rated capacity, the internal overload protection system triggers the circuit to shut off. In addition to the overload protection system, the 55A1122-20-2/29-9 also has a set of standard switch contacts that are used to manually control the on/off status of the motor. These contacts can be controlled either by a switch mounted on the combination switch/starter, or by an external control device, such as a timer or a building automation system.

The 55A1122-20-2/29-9 is an ideal solution when reliable and safe motor control is required. It is easy to install and use and is designed to be both reliable and cost effective.