Specification

Siemens Industry, Inc. SPEEDFAX™ 2017 Product Catalog
3-42
3
MURRAYSafety Switches
HHN422N HHN323NW HHN421NW
a
Switches through 1200 Amps listed by Underwriters’
Laboratories for use on circuits delivering up to
200,000 Amps RMS symmetrical fault current, provided
class “R“, “J“, “L“, or “T“ fuses are used. Rejection
kits must be installed for “R“ fuse application. “T“
fuse adapter kit required for “T“ fuse application. See
Accessory Page.
“J“ fuses can only be used on 100–200A ratings.
“T“ fuses can only be used on 100–1200A ratings.
b
Factory set for use with class “L“ fuses.
c
Starting current of motors above standard horsepower
rating may require use of time delay fuses.
d
Suitable for 3-pole motor loads.
e
Suitable for service entrance application. Neutral
factory-installed.
f
Supplied without knockouts.
g
800A and larger Type 3R switches have no provisions
for mounting hubs. Drill or punch hole in the field to
accommodate hub size desired.

Also rated 250V DC
Figure 1 Figure 2
Switch Selection with Class “H“ Fuse Holders
(Convertible to Class “J“, “R“ or “T“)
a
Symbol Amps
Indoor TYPE 1 Outdoor TYPE 3R
Hub
Horsepower Rating
Single Phase Three Phase
Catalog Number
Std.
Pkg.
Approx.
Wgt. Lbs. Catalog Number
Std.
Pkg.
Approx.
Wgt. Lbs.
240V AC 240V AC 250V DC
Std Max
c
Std Max
c
Std
FUSIBLE 2 POLE 3 WIRE S/N 240V AC (INSULATED GROUNDABLE NEUTRAL)
de 
Fig-1 30
HHN321N
1 12.00 — — — ECHS
1
1
⁄2
3 3
7
1
⁄2
5
60 — — —
HHN322NW
1 19.00 ECHS 3 10
7
1
⁄2
15 10
100 — — —
HHN323NW
1 24.00 ECHS
7
1
⁄2
15 15 30 20
200
HHN324N
1 47.00 — — — ECHS 15 — 25 60 40
800
HLN327N
bf
1 360.00 — — — — — — 100 250 —
1200
HLN328N
bf
1 362.00 — — — — — — 100 250 —
FUSIBLE 3 POLE 4 WIRE S/N 240V AC (INSULATED GROUNDABLE NEUTRAL)
e 
Fig-2 30
HHN421N
1 14.00
HHN421NW
1 15.00 ECHS
1
1
⁄2
3 3
7
1
⁄2
5
60
HHN422N
1 19.00
HHN422NW
1 20.00 ECHS 3 10
7
1
⁄2
15 10
100 — — —
HHN423NW
1 26.00 ECHS
7
1
⁄2
15 15 30 20
200
HHN424N
1 49.00 — — — ECHS 15 — 25 60 40
800
HLN427N
bf
1 380.00
HLN427NW
bf
1 383.00 ECHV
g
— — 100 250 —
1200
HLN428N
bf
1 382.00
HLN428NW
bf
1 385.00 ECHV
g
— — 100 250 —
Safety Switches
Heavy Duty — 240V AC, 10,000 & 200,000 Amp Withstand Cartridge Fuse Type 1 & Type 3R
Accessories and Lug Data —
See pages 3-47 and 3-48.
Dimensions —
See pages 3-50 and 3-51.
Knockout Drawings —
See pages 3-52 and 3-53.
Product Category HDSM