Motortronics
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XLS Series Solid State Soft Starter 39 - 1250A
1.1 General
The XLS Series solid state reduced voltage soft starter is a six SCR
design which features a voltage/current ramp with an anti-oscillation
circuit for smooth load acceleration. The SCRs are sized to withstand
starting currents of 500% for 60 seconds (compared to 350% for 30
seconds from other manufacturers). The XLS Series features smooth,
stepless ramp control which reduces motor inrush current and excessive
wear on the mechanical drive train components. In addition to having
easy to understand diagnostic lights, the XLS Series can be set up for
the ideal starting cycle. Starting voltage, ramp time, current limit, and
decel control are standard adjustments on the XLS Series. The starting
electrical characteristics of the motor can be matched to the mechanical
characteristics of the drive train for controlled acceleration of the load,
by simply adjusting the unit’s starting torque, ramp time and current
limit potentiometers. The XLS Series includes adjustable overload
protection, shorted SCR detection and phase loss detection. It is factory
wired for 120VAC control voltage (or 240VAC for 415 VAC and 380
VAC units) and three-wire start/stop control. Auxiliary contacts and
provisions for interlocking are also included.
Chapter 1 - Introduction
1.2 Specifications and Performance Features
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