GE SPM Series, Instruction Manual

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GE Power Management SPM Synchronous Motor Protection & Control 2-
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2 INSTALLATION 2.1 OVERVIEW
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2 INSTALLATION 2.1 OVERVIEW 2.1.1 DESCRIPTION
The SPM can be incorporated in synchronous motor control equipment as a complete controller (including an
AC power-switching device for the motor starter) or as a field panel (AC power switching supplied by other
device).
2.1.2 ELEMENTS OF A SYNCHRONOUS MOTOR CONTROLLER
A complete synchronous-motor controller has the ability to switch the motor on to and off of the power system
and protect the motor from damage that can occur if the motor is running in an abnormal condition such as out-
of-synchronization.
A complete synchronous-motor controller consists of a motor starter and switching device (typically a contac-
tor) which controls the main power to the motor. In addition, protective relaying is provided for both the stator
and the rotor (such as a 469/SPM combination). Controls for starting and stopping the motor (start-stop push-
buttons) are also included. Indicating and metering devices such as line ammeters are supplied if not included
in the relays. All of these features are common with motor controllers of all types.
Figure 2–1: EXPLODED VIEW OF THE SPM