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AC Duplex Motor Controllers

Factory Modifications (Forms)

Class 8941

Table 16.261:
3-Pole Polyphase—600 Vac Maximum (50–60 Hz) Combination Disconnect Switch Type—With Electric Alternation
Note that the prices shown do not include thermal units. Devices require 6 thermal units.
Standard trip thermal units are $14.30 each. See page 16-129 for selection information.
Motor
Voltage
(Starter
Voltage)
Max.
Hp
Poly-
phase
Coil
Voltage
NEMA
Size
Fuse
Clip
Size
Ampsb
NEMA 1
General Purpose
Enclosure
NEMA 4/4X
Watertight and
Dusttight Enclosure
Stainless Steel
NEMA 12
(NEMA 3 and 3R)a
Dusttight and Driptight
Industrial Use Enclosure
200
(208)
None
30 
 7-1/2
None
60 
None
60 
None
200
230
(240)
240-60
220-50
None
30 
 7-1/2
None
60 
None
60 
None
200
460
(480)
480-60
440-50
575
(600)
None
30 
None
30 
None
60 
None
100
0–1
PILOT DEVICES IN COVERd
“START-STOP” push buttons—one supplied for each motor. (Form C or Form Y68 required.)
“HAND-OFF-AUTO” selector switch—one supplied for each motor.
“NO. 1 LEAD—NO. 2 LEAD” selector switch for manual selection of lead pump.
(Form Y68 required.)
Red "ON" pilot light—one supplied for each motor.

Any
1, 4, 12
C13
P1
Push-to-test red “ON” pilot light—one supplied for each motor.
1, 4, 12
Any
Any
P21
G12
Y29
CONTROL CIRCUIT MODIFICATIONS
Fused control circuit without transformer
One fuse
Fused control circuit transformer, two fuses in primary, with 600, 480, 240 or 208 V primary
and 120 V secondary –one supplied for each starter.
Any
Any
F
F4
418.00
418.00
418.00
418.00
418.00
418.00
418.00