Tweco 161 S UK - Manual (Page 18)

THERMAL ARC 161 S INSTALLATION
Installation 3-2 3-2 Manual 0-5183
• Electrical Input Requirements
Operate the welding power source from a single-phase 50/60 Hz, AC power supply. The input voltage must match
one of the electrical input voltages shown on the input data label on the unit nameplate. Contact the local electric
utility for information about the type of electrical service available, how proper connections should be made, and
inspection required. The line disconnect switch provides a safe and convenient means to completely remove all
electrical power from the welding power supply whenever necessary to inspect or service the unit.
Do not connect an input ((BROWN or BLUE)) conductor to the ground terminal.
Do not connect the ground ((GREEN or GREEN/YELLOW)) conductor to an input line terminal.
1. Connect end of ground (GREEN or GREEN/YELLOW) conductor to a suitable ground. Use a grounding method
that complies with all applicable local electrical codes.
2. Connect ends of line Active (BROWN) and Neutral (BLUE) input conductors to a suitable power supply system
that complies with all applicable local electrical codes.
3. Use Table 3-1 as a guide to select line fuses for the disconnect switch.
Input Voltage Circuit Breaker or Fuse Size
110V 32A
230V 32A
Table 3-1: Fuse Guide
CAUTION
The time-delay fuses or circuit breaker of an individual branch circuit may have nuisance tripping when
welding with this product due to the amperage rating of the time-delay fuses or circuit breaker.
Input Power
Each unit incorporates an INRUSH circuit. When the MAIN CIRCUIT SWITCH is turned on, the inrush circuit
provides pre-charging for the input capacitors. A relay in the Power Control Assembly (PCA) will turn on after the
input capacitors have charged to operating voltage (after approximately 5 seconds)
NOTE
Damage to the PCA could occur if 253 VAC or higher is applied to the Primary Power Cable.
Model Primary Supply Lead
Size (Factory Fitted)
Minimum Primary
Current Circuit Size
(Vin/Amps)
Current & Duty Cycle
LIFT TIG (GTAW) STICK (MMA)
Thermal Arc
161 S
H07RN-F 3x1.5mm²
110V/35.5A - 125A @ 20%
110V/21.3A 125A @ 50% -
230V/23.2A - 160A @ 35%
230V/14.4A 160A @ 40% -
Table 3-2: Primary Circuit Sizes to Achieve Maximum Current