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JKSSS+ Series - 1
JKSSS+ Series 2.3 - 4.2KV
Chapter 1 - Introduction
This chapter is an introduction to the Toshiba JKSSS+ Series reduced voltage solid
state starter for medium voltage AC motors. It describes the basic conguration,
operation and unit features. It is highly recommended that new users read this
section thoroughly to gain a basic understanding of the starter system before
attempting to start up a unit. If you are already familiar with the JKSSS+ Series
starter, you may begin setup procedures immediately by proceeding to Chapter 2 –
Installation.
1.1 Overview
The standard JKSSS+ Series solid state starter is a complete NEMA Class E-2
motor controller designed for the starting, protection and control of AC medium
voltage motors. It contains the motor disconnect switch, motor circuit fuses,
control power transformer, a line isolation contactor, SCR stack assemblies, a
bypass contactor, low voltage controls and motor terminal blocks in that order.
An optional “soft start only” version is also available which is supplied without
the control power transformer, the disconnect switch and line isolation contactor.
(The soft start only model must be used with a customer supplied, mechanically
interlocked line start panel).
1.2Specications