Miller Electric 280 NT, Owner'S Manual

Page: 34 / 60

A complete Parts List is available at www.MillerWelds.com
OM-4430 Page 30
SECTION 7 − OPERATING AUXILIARY EQUIPMENT
7-1. 60 Hz Generator Power Receptacles And Supplementary Protectors
Ref. 211 909
!
If unit does not have GFCI re-
ceptacles, use GFCI-protected
extension cord.
NOTICE − Disconnect equipment
from auxiliary power receptacles dur-
ing start − up and shutdown. Some
equipment can be damaged by
changes in frequency as engine rpms
change during start-up and shut-
down.
Weld output and 60 Hz generator
power output at receptacles RC1
and RC2 are not always available
at the same time. When welding,
generator power is available from
AC receptacle RC3 only (see
Section 7-2).
Generator power is available at
receptacles RC1 and RC2 only at
1800 rpm. If generator is not
locked at 1800 rpm, engine
speed increases in response to
weld load and generator power
output stops at receptacles RC1
and RC2. Generator power load
does not affect engine speed.
1 240 V 50 A AC Receptacle RC1
RC1 supplies 60 Hz single-phase
power at 1800 rpm. Maximum output
is 5 kVA/kW (20 A at 240 volts ac). For
60 Hz generator power at RC1, set
controls as shown in table.
2
120 V 20 A AC Duplex
Receptacle RC2
RC2 supplies 60 Hz single-phase
power at 1800 rpm. Maximum output
from RC2 is 2.4 kVA/kW (20 A at 120
volts ac).
3
Supplementary Protector CB1
CB1 protects receptacles RC1 and
RC2 from overload. If CB1 opens, the
receptacles do not work. Place switch
in On position to reset.
4
Supplementary Protector CB2
CB2 protects RC2 from overload. If
CB2 opens, the receptacle does not
work. Press button to reset.
If supplementary protector con-
tinues to open, contact Factory
Authorized Service Agent.
Combined output of all receptacles
limited to 5 kVA/kW continuous rating
of the generator.
EXAMPLE: If 10 A is drawn from 120
V duplex receptacle RC2, only 16 A is
available at 240 V receptacle RC1.
(120 V x 10 A) + (240 V x 16 A) = 5
kVA/kW
Controlling Engine Speed And Weld/Generator Power Output
1800 rpm
(Power Speed)
Continuous
No Load: 2400 rpm
(Idle Speed)
Load: 3600 rpm
(Weld Speed)
Either
Run/Idle
position.
Engine Controls
Engine Speed
Generator Power
Output
Weld Output
5 kW/kVA Total From
All AC Receptacles
2.4 kW/kVA at 60-120
Hz From AC
Receptacle RC3 Only
No Load: 1800 rpm
(Idle Speed)
Load: 3000 rpm
(Weld Speed)
Welding Not
Recommended
3600 rpm:
20 − 300 A
3000 rpm:
20 − 220 A
5 kW/kVA Total From
All AC Receptacles
At 1800 rpm.
At 3000 rpm, Output
Available Only At 2.4
kW/kVA 60-120 Hz AC
Receptacle RC3
See Section
7-2 for RC3
information.
1
3
2
4