Full Product Manual
10
Section 1 Introduction and Specifications
MODEL: Lightning MTS 275 Serial No.
EN/ IEC60974.1
240V; DC: 30-250A; 15.5-26.5V 120V; DC: 30-150A; 15.5-21.5V
X 60% 100% 35% 60% 100%
U0 V
74V
I2 250A 200A NA 150A 90A
U2 26.5V 24V NA 21.5V 20V
240V; DC: 10-250A; 10.4-20V
AC: 15A-250A; 10.6-20V
120V; DC: 10-150A; 10.4-16V
AC: 15-150A; 10.6V to 250A/20V
X 60% 100% 35% 60% 100%
U0 V
74V
I2 250A 200A NA NA 150A
U2 20V 18V NA NA 16V
120V; DC 10-120A; 20.4V-24.8V 240V; DC: 10-200A; 20.4– 28V
X 60% 100% 40% 60% 100%
U0 V
74V
I2 200A 160A 120A 90A
U2 28V 26.4V 24.8V 23.6V
1~ 50/60 Hz
U1
120-240V
120V I1MAX: 42.8A I1EFF 34A
240V I1MAX: 44.9A I1EFF 35A
PROTECTION
CLASS
IP21S
COOLING METHOD:
4 FULL-TIME FANS
INSULATION: F
WIRE SPEED:
240V: 60-600 IPM
120V: 60-400 IPM
f1
f2
1~
S
S
S
LIGHTNING MTS 275
EVERLAST
IMPORTANT!
Keep this welder at least 18 inches away from all objects for proper cooling. This unit uses multiple fans at different spots within the machine for
cooling. For this reason, proper spacing is imperative from all sides. Do not exceed 40° C in environment or duty cycle will be reduced. Regu-
larly inspect and clean the welder and circuitry on a monthly basis with dry compressed air. Remove the covers only after the unit has been
turned off and unplugged for 30 minutes to discharge the capacitors and to prevent the possibility of electrocution. Do not grind or direct sparks
near the welder to prevent damage to the panel face and internal components. Check fan blades for build up and metal scale/dust and remove
carefully. Failures or damages to the unit due to accumulation of dirt and debris on circuit boards or fan blades are not covered under warranty.
Opening your unit up to clean or adjust the unit does not void your warranty, and in fact ensures your unit will perform correctly and will uphold
your warranty.
NOTICE:
This welder conforms to North American electrical standards for 120V and 240V single phase welders, including plug type (NEMA 6-50P) and
wire gauge. When wiring a new electrical service or modifying an existing electrical service for use with this welder, always consult with a local,
licensed electrician. Refer to Article 630 of the NEC and to the I1MAX (Inrush Current) and the I1EFF (Effective rated current) listed above when
selecting breaker size and the wire gauge to ensure that your installation will conform to national and local electrical codes for welding equip-
ment. Wiring codes for welders differ from wiring codes for household electrical equipment for both plug type, breaker and wire sizing. Do not
attempt to rewire this welder, or make similar unapproved modications to this welder. To do so will void the warranty. To operate on 120V, use
the supplied adapter to adapt the unit from 240V operation to 120V operation. The unit will automatically adapt once the unit is switched on.
When operating on 120V, the output is reduced. See information above for range of output and duty cycle ranges operating on 120V and 240V.
Electrical Specications