Control_Flippingbook_NOV 2024

NEMA FULL VOLTAGE POWER DEVICES, CONTROL SECTION 1

1-25

— Open/enclosed non-combination magnetic starters CR309 2-speed starters

Used for full-voltage operation of two-speed squirrel-cage induction motors at either speed. Consists of two mechanical and cross electrical interlocked contactors with two three-leg block type overload relays, one on each contactor. These bimetallic relays provide overload protection for each speed. 3-3 pole starters are for two-speed, two winding motors; 5-3 pole starters are for two speed, one-winding consequent pole motors.

200 horsepower maximum NEMA Sizes 0–5, 600 volts maximum 50/60 Hz

Proper motor-speed selection is obtained by adding pilot devices to correspond to each of the motor speeds.

CR309C002BAA

Please reference the NEMA full voltage power devices catalog for additional technical data, selection and installation guides, and dimensional drawings.