380V AC Contactor

In the world of industrial power, 380V three-phase electricity is the flowing blood, and the SPX Electric durable 380V AC Contactor optimized for this voltage is the heart valve that precisely controls blood flow. Choosing a contactor that is truly designed for 380V systems, rather than just a universal model for "derating" at higher voltage levels, means implanting genes of higher compatibility, better performance, and longer lifespan into your device.

The coil, iron core, and reaction spring are optimized for their suction characteristics at 380V voltage, ensuring reliable suction and release within a fluctuation range of ± 10% of the rated voltage, avoiding noise, vibration, or weak suction caused by poor voltage adaptation.

The electrical clearance and creepage distance between internal live parts are strictly designed and manufactured according to the insulation level required for the 380V voltage level, providing precise and non excessive safety guarantees to ensure long-term insulation stability in humid and dusty environments.

There are often operational overvoltages and transient surges in industrial power grids. The arc extinguishing system and insulation material of the 380V dedicated contactor can effectively withstand such impacts, reducing the risk of breakdown or arc reignition.

For high operating frequency (AC-3, AC-4 categories) working conditions such as motor start stop, inching, and reverse braking in industrial sites, the electrical and mechanical life indicators directly correspond to the actual load conditions at 380V.Key performance parameters:

Rated insulation voltage (Ui): typically 690V or higher, providing sufficient safety redundancy for 380V operating voltage.Rated working current (Ie): The selection should be based on the current value corresponding to the controlled load (such as motor power) at 380V voltage.For example, if a 22kW three-phase motor has a rated current of approximately 42A at 380V, a contactor with a rating of ≥ 45A should be selected. Usage category: AC-3 (squirrel cage motor start stop) is the most common standard. If used for frequent inching or reverse braking, it needs to be selected or reduced in capacity according to the AC-4 category.

Selection and Application Guide:

Application areas:
The 380V AC Contactor in stock is suitable for controlling all three-phase motors of machine tools, pumps, fans, compressors, conveyors, and production line machinery.The 380V AC Contactor serves as a standard component in motor control centers (MCC), distribution panels, and capacitor compensation cabinets.
Power control for central air conditioning unit, cooling water pump, elevator traction machine, and fire pump.
Power switches for water supply systems, sewage treatment, port lifting equipment, and other applications.

SPX AC Magnetic Contactor Parameter

Frame(A)			SS-T20
KW/HP(AC-3) Reted power(AC-3) IEC60947-4		220V	3.7
		380V	7.5
Reted current(AC-3) GB14048.4		220V	18
		380V	18
Reted heating current(A)			32
Reted insutaled voltage(V)			660
Auxicary contact AC-15	Contact	Standard	1NO+1NC
	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-T20	44	75	78	60	30/35	4.2