SEVA-tec Motor Switches

Star-Delta Connection (YΔ)

The star-delta connection is a proven method for starting larger squirrel-cage three-phase motors with reduced power consumption. This prevents fuses from tripping due to high starting currents.

The process in detail:

• Star (Y): Start with only 1/3 of the power.
• Delta (Δ): Switching to full motor power after run-up.

Although frequency inverters are often standard today, the cam switch remains a cost-efficient and low-maintenance solution for many applications.

Reversing switch wiring diagram for electric motors

Reversing switches for direction change

A three-phase reversing switch allows for direction reversal. By swapping two phases, the rotating field is changed, so that the motor starts in the opposite direction.

Safe disconnection from the mains

In the "0" position, SEVA-tec switches completely disconnect all three phases from the mains. The motor is only switched back on in the new direction after this safe stop.

Your advantages:

• High mechanical service life.
• Simple, intuitive operation.
• Robust design for high protection classes.