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AC Duplex Motor Controllers

 

Class 8941

Duplex Motor Controllers are used to control two motors, and consist of two starters in a common enclosure. Two separate disconnect switches or circuit breakers with operators are included with all combination devices. Unless Form Y68 is specified, an alternation circuit (a Class 8501 Type XO40 relay) is included, which alternately operates first one motor and then the other on each successive closing of a pilot device. Both motors will be energized should a second pilot device close. All devices incorporate a terminal block to simplify wiring of pilot devices A and B. Typical applications include pump motors where a second pump is required for peak demand periods yet alternation is desirable to equalize pump wear.

 

Table 16.259:

3-Pole Polyphase—600 Vac Maximum (50–60 Hz) Non-Combination Type—Without Disconnect—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.

NEMA Size	Maximum Rating Each Motor		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		Open Type
	Voltage	Hp Polyphase	Type	$ Price	Type	$ Price	Type	$ Price	Type	$ Price
0	200–230 460–575	3 5	NBG10b	1548.	NBW10b	2070.	NBA10b	1709.	NBO10b	1425.
1	200–230 460–575	7-1/2 10	NCG20b	1652.	NCW20b	2193.	NCA20b	1814.	NCO20b	1529.
2	200 230 460–575	10 15 25	NDG30b	2487.	NDW30b	3618.	NDA30b	2906.	NDO30b	2193.
3	200 230 460–575	25 30 50	NEG40b	3408.	NEW40b	5535.	NEA40b	3950.	NEO40b	2991.
4	200 230 460–575	40 50 100	NFG50b	6960.	NFW50b	10587.	NFA50b	8754.	NFO50b	6077.

 

Table 16.260:

3-Pole Polyphase—600 Vac Maximum (50–60 Hz) Combination Thermal Magnetic Circuit Breaker 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 Starter Voltage	Max. Hp Poly- phase	Coil Voltage b	NEMA Size	Circuit Breaker		NEMA 1 General Purpose Enclosure		NEMA 4/4X Watertight and Dusttight Stainless Steel Enclosure		NEMA 12 (NEMA 3 and 3R)a Dusttight and Driptight Industrial Use Enclosure
				Frame Size	Ampere Rating	Type	$ Price	Type	$ Price	Type	$ Price
200 (208)	2   3	208–60	0	FAL	15  20	CBG06b CBG08b	2630.	CBW06b CBW08b	4634.	CBA06b CBA08b	3134.
	5   7-1/2		1	FAL	35  50	CCG12b CCG15b	2735.	CCW12b CCW15b	4739.	CCA12b CCA15b	3239.
	10		2	FAL	60	CDG22b	3884.	CDW22b	6980.	CDA22b	4596.
	15 20 25		3	FAL FAL KAL	90 100 110	CEG32b CEG36b CEG38b	6267.	CEW32b CEW36b CEW38b	11660.	CEA32b CEA36b CEA38b	7188.
	30 40		4	KAL	125 200	CFG41b CFG44b	13056.	CFW41b CFW44b	19949.	CFA41b CFA44 b	15600.
230 (240)	2   3	240–60 220–50	0	FAL	15  20	CBG06b CBG08b	2630.	CBW06b CBW08b	4634.	CBA06b CBA08b	3134.
	5   7-1/2		1	FAL	30  45	CCG14b CCG16b	2735.	CCW14b CCW16b	4739.	CCA14b CCA16b	3239.
	10 15		2	FAL	60  80	CDG22b CDG24b	3884.	CDW22b CDW24b	6980.	CDA22b CDA24b	4596.
	25 30		3	FAL KAL	100 110	CEG36b CEG38b	6267.	CEW36b CEW38b	11660.	CEA36b CEA38b	7188.
	40 50		4	KAL	150 200	CFG43b CFG44b	13056.	CFW43b CFW44b	19949.	CFA43b CFA44b	15600.
460 (480)	5	480–60 440–50	0	FAL	15	CBG10b	3239.	CBW10b	5241.	CBA10b