Emerson VSG Manual page 10

Instrumentation Requirements
MOTOR
COMPRESSOR
OIL SEPARATOR
STANDARD SINGLE
OIL FILTER
OPTIONAL DUAL OIL FILTERS
OIL COOLER
STANDARD WATER COOLED OIL COOLER
OPTIONAL REMOTE AIR COOLED OIL COOLER
Miscellaneous: Additional instrumentation devices required are a current transformer mounted around one
phase of the drive motor leads to measure main motor amperage, and two rotary potentiometers to read the
position of the slides. The amperage signal provides annunciation for high motor amperage, and is used in the
capacity control logic. The rotary potentiometers indicate the position of the slides, which is used as a start-
ing permissive and in the capacity control logic. Also, additional input points may be required for customer
connection of remote signals such as Start and Stop commands, and capacity setpoint control.
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