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UL 508 Motor Disconnect Switches MD Motor Disconnect Switches
schneider-electric.us
Class 3110 / Refer to Catalog 3100CT0901
8
OPERATING MECHANISMS AND
DISCONNECT SWITCHES
MD Motor Disconnect Switches
D
H
W
MD Motor Disconnect Switch
The MD motor disconnect switch is listed UL 508 Suitable for Motor Control
(UL File E164864) and conforms to IEC standard 60947-3. It is in a compact NEMA 4X
enclosure suitable for use in NEMA 1, 3, 3R, 4, 4X, and 12 applications. The MD's key
benefits are an extremely small footprint, a more economically efficient NEMA 4X
solution, and a handle interlock preventing cover removal when the switch is in the ON
position.
Switch features:
•
Suitable for NEMA 1, 3R, 4, 4X, and 12 enclosure applications.
•
Complies with OSHA lockout/tagout requirements—accepts up to three 8 mm
padlocks.
•
For accessories, see Table 8.20.
Table 8.26: MD Motor Disconnect Switch—Non-Metallic NEMA 1, 3, 3R, 4, 4X, and
12 Enclosure
Amperes
Cat. No.
Maximum Horsepower Ratings
Height
(in.)
Width
(in.)
Depth
(in.)
Three-Phase Vac
220–240 440–480 600
30 MD3304X 7.5 20 25 6.38 3.9 4.37
60 MD3604X 20 40 40 8.27 4.94 4.37
Table 8.27: MD Motor Disconnect Accessories
Cat. No.
Description
MDSAN20
2 N.O. auxiliary contact module
MDSAN11
1 N.O. and 1 N.C. auxiliary contact module
MDS30P
30 A add on power pole