Square D Digest 179

Full Voltage

Duplex AC Motor Controllers

Class 8941

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Table 16.252: Type Fig.

A

B

C

D

E

F

G H

J

K

L

M

Knockouts

V

in. mm

in. mm

in. mm 6.67 169

in. mm 9.70 246

in. mm

in. mm

in. mm 7.00 178

in. mm 2.41 61

in. mm 3.00 76

in. mm Conduit

in. mm R

in. mm 1.41 36

S

T

NPD/E/F SSC SSD

2.41 61 0.5–0.75 1.25–1.5 0.5–0.75

39.05 992

13.73 349

33.05 839

37.93 963

3.00 76

2.5

1

NPG/J SSE/F XSE/F

49.00 1245

19.15 486

8.81 224

10.37 263

44.07 1119

47.88 1216

7.00 178

2.17 55

2.69 68

3.44 87

2.57 65 0.5–0.75

1.41 36

1–1.25 1–2.5

1–1.25 1.5–2

2.5

1

WC—S2 WD—S2 XC—S2 XD—S2 WE—S2 WF—S2 XE—S2 XF—S2 16 NEMA AND DEFINITE PURPOSE CONTACTORS AND STARTERS 1 38.50 978 19.00 483 1

2.12 54 0.5–0.75

7.29 185

9.39 239

34.00 864

37.38 949

7.00 178

2.18 55

2.13 54

2.13 54

1–1.25 1.5

0.5–0.75 —

1.5

1.50 38 1.50 38 N/A

56.50 1435 75.50 1892 82.50 2096 92.50 2350

23.00 584 22.00 559 36.00 914 34.00 864

8.23 209

10.33 262 17.55 446 23.25 591 23.25 591

52.00 1321 73.00 1854 80.00 2032 90.00 2286

55.38 1407 74.50 13 33.75 857 31.75 806

7.00 178

2.18 55

2.69 68 0.56 14

3.44 87

2.68 68 0.5–0.75

1–1.25 2–2.5

1–1.25 1.5–2

2

13.80 351 20.00 508 20.00 508

14.00 356 N/A

SSG XSG 1 XSH 2

N/A N/A N/A

N/A

N/A

N/A

16.50 419 N/A N/A N/A N/A N/A 16.50 419 N/A N/A N/A N/A N/A

N/A

N/A

N/A

XSJ

2

N/A N/A NOTE: Illustrations may not represent the actual enclosure. They are intended for dimensional information only. Dimensions: in. mm N/A N/A

Figure1

Figure2

Selection 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 FormY68 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 16.253: 3-Pole Polyphase—600 Vac Maximum (50–60 Hz) Non-Combination Type—Without Disconnect—With Electric Alternation (replace ●●● with the voltage code) (Devices require 6 thermal units. See Thermal Unit Selection, page 16-134.)

NEMA4/4X Watertight and Dusttight Enclosure Stainless Steel

NEMA12 (NEMA 3 and 3R) [1] Dusttight and Driptight Industrial Use Enclosure

NEMA1 General Purpose Enclosure

Maximum Rating EachMotor

OpenType

NEMA Size

Hp Polyphase

Voltage 200–230 460–575 200–230 460–575

Type [2]

Type [2]

Type [2]

Type [2]

3 5

0

NBG10●●● NBW10●●●

NBA10●●●

NBO10●●●

7.5 10

NCG20●●● NCW20●●●

NCA20●●●

NCO20●●●

1

[1] NEMA 12 enclosures can be field modified for outdoor applications. For details, refer to Class 9991 on page 16-113. [2] Replace the three bullets (●●●) in the catalog number with the coil voltage code. Refer to the standard voltage codes listed inTable 16.264.

16-96

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