55kW Enclosed Star Delta Starter

Model Number
Generally a stocked item but please contact us for availability on + 44 (0)1686 688948
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£1,524.46 £1,270.38

The MCW 55kW Enclosed Star-Delta Starter is manufactured from three contactors, a timer, a thermal overload relay (Trip Class 20), 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 55kW Enclosed star delta starters is fitted with a Trip Class 20 thermal overload relay as standard which is suitable for the majority medium to heavy industrial type load applications.

Trip class by application 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. 


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

Model Number SDS55EN400V
Power kW 55
Trip Class 20
Input Voltage 400VAC +/-10%
Coil Voltage 400VAC +/-10%
MCB Break Capacity 10kA
Encl Rating IP65
Overload 18-90A
Material Powder Coated Steel
Motor Current 31-155A
Depth 300mm
Length 800mm
Width 800mm
Weight 47.000000