6-wire motor connection reduces cost
Large motors can have the soft-starter wired between the three motor winding connections (“inside the delta”) to substantially reduce cost while retaining all the benefits of the soft starter. This is useful if the motor control centers can be placed near the motors, where the main disconnect switch also becomes the motor safety isolation switch. It also eliminates the cost of the isolation switch, giving a further saving. For 2-motor mixers such as the Ocmix RG twin-shaft and similar, when the MCC must be positioned away from the mixer, conventional 3-wire connection should be used, but a 6-pole isolation switch is required. We can provide very competitive pricing on this special switch, to avoid having to lock-out two three-phase switches when working on the mixer.
Talk to us about these cost saving options for your motor control centers – they are absolutely as safe as conventional methods and meet all codes.