MS116-0.25A Motor starter switch 1SAM250000R1002

Motor protection switches – reliable drive protection

Motor protection switches, such as MS116-0.25A, play a key role in protecting electric motors from overload and short circuit. This device, with a width of 45 mm, height of 90 mm and depth of 85.6 mm, is a compact and effective solution for installations with a power of up to 15 kW (at 400 V). Designed for both professional installers and end-users, these switches ensure safe and reliable operation of electrical systems.

Construction and functionality

MS116-0.25A is a complete device in a housing, designed to operate in circuits with a rated voltage of 690 V. It has three poles and offers a rated continuous current of 0.25 A. The overload release can be adjusted in the range of 0.16 to 0.25 A, allowing for precise adaptation to the characteristics of the protected motor. In addition, the switch is equipped with thermal and magnetic protection, providing comprehensive protection against various types of failures. The rated short-circuit breaking capacity at 400 V AC is as high as 100 kA, which guarantees effective disconnection of the circuit in the event of a short circuit. It is worth noting the presence of phase failure sensitivity – an important function that increases the safety of the installation.

Application and benefits

The MS116-0.25A switch finds application in a wide range of industrial and commercial applications where reliable protection of electric motors is required. Thanks to its compact dimensions, it is ideal for installations with limited space. The use of this type of switch translates into:

• Increased safety: Protecting the motor from damage caused by overload or short circuit minimizes the risk of downtime and costly repairs.
• Long-term reliability: Solid construction and high quality of workmanship guarantee long device life even in difficult working conditions (IP20).
• Simple installation: Screw connection of the main contacts facilitates quick and secure installation in existing electrical installations.
• Precise settings: Adjustable overload release range allows for optimal adaptation to a specific motor and application.
• Compact dimensions: Allow mounting in tight spaces without compromising functionality.
• High short-circuit breaking capacity: Ensures effective disconnection of the circuit in the event of a short circuit, minimizing the risk of equipment damage and hazards to people.

Additionally, the thermomagnetic tripping method provides effective protection against both long-term overloads and sudden current surges – typical for starting motors with high starting torque. Power losses of 4.8 W indicate relatively low energy consumption by the device during operation.