Large CP compressor equipped with Allen-Bradley Bulletin 640 resistance starter. Motor is speeded υρ by slowly raising starter lever. No cur rent inrush—velvet smooth start.
Trane air-conditioning compressor equipped with Allen-Bradley Bulle tin 7 4 0 automatic resistance.starter. Two-step starter smooths out current inrush—prevents lamp flicker.
BULLETIN 640 manual starter with cabinet open to show the three starting compression resistors.
EASY O N THE L I N E . . . EASY O N THE MOTOR No jerks or jolts—Satisfies the power company Allen-Bradley compression resistance starters a f f o r d a neat solution for smoothing out the starting current and torque of heavily loaded squirrel cage motors. Graphite disc resis tors, available only in Allen-Bradley compression starters, control the starting current and torque with velvet smooth ness . . . and without lamp flicker. These jerkless starters prevent damage or undue stress on belts, chain drives, or gears. They are equipped with dependable and accurate overload relays. Available for squirrel cage motors up to 200 hp, 2 2 0 4 4 0 - 5 5 0 v. Send for Bulletins 6 4 0 and 7 4 0 , today. Allen-Bradley Co. 1 3 4 6 S. Second St. Milwaukee 4 , Wis.
BULLETIN 7 4 0 automatic resistance starter. Starting resistors are located behind the two contactors.
In Canada— Allen-Bradley Canada Ltd.
Gait, Ont.
ALLEN-BRADLEY S O L E N O I D
M O T O R
For further information, circle number 104 A on Readers' Service Card, page 119 A 104 A
INDUSTRIAL A N D ENGINEERING CHEMISTRY
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