30kW Enclosed Star Delta Starter

The MCW 30kW Enclosed Star-Delta Starter is manufactured from three contactors, a timer, a thermal overload relay (Trip Class 10), two push buttons, a keyed E-Stop button, 3 phase MCB (power), single phase MCBs (control) and a 3 phase interlocked isolator.

Enclosed Star Delta Starter Demonstration Video

Enclosed Star Delta Starter Trip Class

The MCW Enclosed star delta starters are fitted with a Trip Class 10 thermal overload relay as standard which is suitable for the majority of light to medium industrial type load applications. As an option the soft start can be converted to Trip class 20 (medium to heavy industrial loads) at time of purchase. This may involve a larger star delta starter contactor arrangement, a trip class 20 thermal overload and a larger MCB/MCCB. Please note on some models when upgrading to trip class 20 the enclosure size may increase.

 Trip Class by Application Chart

The MCW Enclosed star delta starter range are not suitable for applications that have a very heavy load on start that takes greater than 20s to start or very high inertia loads such as high inertia fans, centrifuges or loaded crushers.

Starting the MCW Enclosed star delta starter more than once every 10 minutes will alter the thermal overload tripping characteristics making the overload trip more quickly for a given thermal overload current setting.

Trip Class Explained

At 600% of the maximum current rating of the motor the Trip Class 10 unit will trip in 10 seconds or less, Trip Class 20 will trip in 20 seconds or less, and Trip Class 30 will trip in 30 seconds or less. 

Features

Powder coated steel enclosure
Interlocked mains isolator
3 phase MCB - Power
1 phase MCBs - Control
Tri rated cable
Motor outputs to terminals
Terminals for external stop/start
Keyed E-Stop button front mounted