Miller HF-251D-1 User manual
High-Frequency Arc
Starter and Stabilizer
Issued August 2007 • Index No. AY/5.0
Processes
Gas Tungsten Arc
Welding (TIG)
Input Power 1-Phase Power
Rated Output 250 A, 60% Duty Cycle
Weight HF-251D-1: 34 lb (15 kg)
HF-251-2: 36 lb (16 kg)
Industrial/Light Industrial Applications
General Manufacturing
Tool and Die
Repair Shops
All-Purpose Maintenance
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
Web Site
www.MillerWelds.com
International Headquarters
Phone: 920-735-4505
USA FAX: 920-735-4134
Canadian FAX: 920-735-4169
International FAX: 920-735-4125
Quick
Specs
The Power of Blue®
.
Gas solenoid valve.
Two versions (115 VAC, 50/60/100 Hz
and 230 VAC, 50/60 Hz) meet most
single-phase power configurations, and
all are rated at 60% duty cycle.
The HF-251 is compatible with power
sources made by other manufacturers.
For use with power sources with 14-socket
receptacle (5-socket adapter available).
Power on/off switch with pilot light.
Start, off and continuous control.
With the addition of an HF unit,
your constant-current power source
can handle welds on aluminum,
magnesium, thin stainless steel,
brass, copper and a wide variety of
both ferrous and non-ferrous alloys.
High-frequency intensity control.
Built-in postflow eliminates
contamination.
Protected secondary terminal.
Convenient, portable design can be
easily moved from location to location.
14-pin receptacle on front panel for
remote controls.
Warranted for 1 year, parts and labor.
Increase the flexibility and performance
of most AC, DC or AC/DC constant-current
welding machines with these portable
high-frequency arc starters and stabilizers.
The unit impresses high frequency on the
welding circuit and provides the arc control
needed for TIG welding.
HF-251
Specifications (Subject to change without notice.)
Model
HF-251D-1
HF-251-2
Input Volts
115 VAC, 50/60/100 Hz
230 VAC, 50/60 Hz
Net Weight
34 lb (15 kg)
36 lb (16 kg)
Rated Output at 60% Duty Cycle
250 A
Dimensions
H: 13 in (330 mm)
W: 9-1/4 in (235 mm)
D: 16 in (406 mm)
Genuine Miller Options and Accessories
Secondary Contactor
Kit
For HF-251D-1 model
#041 969 Field only
For HF-251-2 model
#041 906 Field only
Mounts inside HF-251 cabinet. For use
with a power source that does not have
its own contactor.
Remote Controls and Switches
Controls listed below are for use with Miller constant-
current power sources with solid-state output control.
The controls are used when remote current control is
desired. The HF-251 is equipped with a 14-pin plug on
a 6 ft (1.8 m) cord for direct connection to new Miller
CC power sources. An adapter cord will be required
for older Miller equipment with 5-socket receptacles.
RMLS-14 #129 337
Momentary- and maintained-contact rocker
switch. 20 ft (6 m) cord with 14-pin plug.
RCC-14 #151 086
Attaches to the TIG torch handle to provide
contactor and current control. Includes 28 ft
(8.5 m) cord and 14-pin plug prewired.
RHC-14 #129 340
Miniature remote hand current and
contactor control. Includes 20 ft (6 m) cord
and 14-pin plug.
RFCS-14 #043 554
Foot pedal current and
contactor control.
Includes 20 ft (6 m)
cord and 14-pin plug.
Extension Cords
#122 973 25 ft (7.6 m)
#122 974 50 ft (15 m)
#122 975 75 ft (23 m)
Extends HF-251 farther from power source or
extends remote control farther from HF-251.
Adapter Cord #129 341
1 ft (305 mm) cord with 5-pin and 14-pin
plugs for use between 5-socket receptacle
power source and HF-251.
Adapter Cord #041 947
1 ft (305 mm) cord with 14-pin plug
and 5-socket receptacle for use between
HF-251 and 5-pin remote controls.
Water Coolant Systems
Coolmate™3
#043 007 115 VAC
#043 008 230 VAC
Delivers cooling capacity for torches
rated up to 600 A.
Coolmate™V3 #043 009 115 VAC
Cools torches rated up to 500 A.
Coolmate™4 #042 288 115 VAC
Cools torches and guns rated up to 600 A.
For use with water-cooled guns. Refer to
Literature Index No. AY/7.2 for additional
coolant system information.
Typical TIG (GTAW) Torches
Air-cooled Torches
#WP-17-25-2 (150 Amp)
#WP-26-25-2 (200 Amp)
Water-cooled Torches
(Requires
45VII Adapter)
#WP-18-25-R (350 Amp)
#WP-20-25-R (250 Amp)
Miller Power
Source
with 5-Socket
Receptacle
Electrode Cable
Work Cable
1 ft (305 mm)
Adapter Cord
(#129 341)
Optional Extension Cords
(See Options and Accessories
for Lengths Available.)
6 ft (1.8 m) Cord
Supplied with HF-251
Work
TIG Torch
Remote
To 115 Volt Supply – 10 ft (3 m)
HF-251
Denotes Plug (Threaded Collar) Denotes Receptacle (External Threads)
TIG Torch
Electrode Cable
Work Cable
Optional Extension Cords
(See Options and Accessories
for Lengths Available.)
Work
Remote
6 ft (1.8 m) Cord
Supplied with HF-251
Miller Power
Source
with 14-Socket
Receptacle
To 115 Volt Supply – 10 ft (3 m)
HF-251
1
2
3
4
5
1. Pilot Light
2. Power Switch
3. High Frequency Switch
4. High Frequency
Selector Switch
5. High Frequency
Intensity Control
Typical InstallationsControl Panel
Distributed by:
Litho in USA
Power Source and Options Stock No. Description Qty. Price
HF-251D-1 #042 388 115 V, 50/60/100 Hz
HF-251-2 #042 387 230 V, 50/60 Hz
Secondary Contactor Kit #041 969 For HF-251D-1 model. Field only
#041 906 For HF-251-2 model. Field only
Date: Total Quoted Price:
Ordering Information
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