SS-T21 3 phase AC contactor

Product Description

In the field of electrical engineering, three-phase AC contactors are key components for controlling and managing three-phase motors and various electrical equipment. This electrical switching device is designed to connect or disconnect circuits through the action of electromagnets and is an important tool for ensuring the efficient operation of industrial machinery and systems. Three-phase AC contactors are not only an integral part of the function of motors, but also play a vital role in improving the safety and reliability of electrical equipment.

One of the main advantages of three-phase AC contactors is their simple structure, which makes them easy to operate and maintain. The design usually consists of a coil, armature, and contacts, which work together to facilitate the switching action. When current flows through the coil, it creates a magnetic field that attracts the armature, closing the contacts and completing the circuit. This simple mechanism ensures that operators can quickly understand and manage the equipment, reducing the possibility of operating errors and improving overall system efficiency.

In addition to their simplicity, three-phase AC contactors are also known for their high reliability. This reliability is particularly important in industrial environments, where equipment must operate continuously under harsh conditions. The contactors are carefully designed to withstand a variety of environmental factors, including high temperatures and high humidity, ensuring stable performance even in harsh conditions. This durability not only extends the service life of the contactor, but also minimizes the risk of unexpected failures, thereby avoiding costly downtime and repairs.

Three-phase AC contactors are often equipped with auxiliary contacts that enable a range of control functions. These auxiliary contacts allow for both remote control and automatic control functions, providing operators with greater flexibility in managing electrical systems. For example, auxiliary contacts can be used to signal alarms, control additional circuits, or integrate with automation systems, thereby enhancing the overall functionality of electrical installations. This versatility makes three-phase AC contactors a valuable asset in modern industrial applications.

The range of current ratings of three-phase AC contactors is another important feature of their widespread use. These devices are available in a variety of ratings to suit motors and loads of varying power. This adaptability ensures that engineers can select the right contactor for their specific application, whether it is small machinery or large industrial equipment. By accommodating a wide range of current ratings, three-phase AC contactors provide a reliable solution for a variety of electrical needs, further solidifying their position as the cornerstone of electrical control systems.

SPX AC Magnetic Contactor Parameter

Frame(A)			SS-T21
KW/HP(AC-3) Reted power(AC-3) IEC60947-4		220V	4
		380V	7.5
Reted current(AC-3) GB14048.4		220V	20
		380V	20
Reted heating current(A)			32
Reted insutaled voltage(V)			660
Auxicary contact AC-15	Contact	Standard	2NO+2NC
	Reted current (A)	220V	1.6
		380V	0.95
Electric life			100
Machanical life			500
Outline and installation dimension
			Type	L	W	H	C1	C2	ΦD
			SS-T21	63	81	81	58	54	4.5