New in the Tripus range – control boxes with Soft Starters – as an alternative to Star-Delta Starters

Watch the video review

In the video, we presented a model designed for motors rated from 1.5 kW to 7.5 kW (400V AC). Below, we outline when it pays to consider a soft starter control box as an additional option for your facility.

Star-Delta vs. Soft Starter – when to choose soft starting?

The traditional Star-Delta system continues to perform reliably in many standard industrial applications and remains a popular method for reducing inrush current. However, if your setup requires the elimination of mechanical shock and demands controlled, smooth stopping, a soft starter serves as an ideal addition to your equipment lineup.

Key advantages of the Soft Starter solution:

• Smooth starting and soft-stop: two-phase thyristor control eliminates sudden current spikes and mechanical shock, protecting V-belts, gearboxes, and pumps.
• Compact “plug & play” design: instead of mounting a complex assembly of three contactors and a timer relay, you receive a pre-wired module housed in an IP54-rated ABS enclosure (dimensions: 238 x 220 x 148 mm, weight: 2.8 kg).
• Built-in bypass relay: once the acceleration ramp is complete, the thyristors are bypassed. The device generates no excess heat during continuous operation, significantly extending its service life.
• Quick parameter setup: three easy-to-read potentiometers on the board allow precise adjustment of:
  • Acceleration time: 0.5 – 10 s
  • Initial voltage: 0 – 80% Un
  • Deceleration time: 0.5 – 10 s

Rich feature set and enhanced safety

The Tripus control box has been designed for maximum installer convenience and operational safety:

• Industrial front controls: main switch with lockable rotary handle (lockout/tagout ready for safe maintenance), START/STOP push buttons, Emergency Stop palm button, and a replaceable control circuit fuse (1A).
• 16A appliance inlet with phase inverter: allows instant motor rotation reversal (left/right) with a single turn of a screwdriver.
• Overload protection: built-in thermal overload relay (e.g., setting range 11.3 – 16 A) featuring manual or automatic reset options and a dedicated TEST button.
• Auxiliary control terminals: integrated terminals enable connection of motor PTC thermistors as well as safety interlocks or limit switches (terminals S1-S2).

Where do soft starter control boxes perform best?

Tripus soft starters are the ideal choice for applications where preventing violent mechanical jerks is critical:

• Industrial fans and cooling systems (protecting V-belts),
• Belt conveyors and production lines (protecting delicate conveyed goods),
• Submersible and metering pumps (eliminating water hammer),
• Woodworking machinery, mills, and shredders.

Whether you are looking for a proven Star-Delta starter, advanced VFD speed control, or a smooth soft start without pressure surges and mechanical shock – our offer has the tailored solution for your system.

👉 [Explore the full range of Tripus control boxes with integrated soft starters on our product page!]

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