CHAPTER 2: GENERAL SETUP
MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
2-2
990-057
Power Line Voltage, Current, and Wire Size Requirements
WARNING:
The HF2 Weld Control and HF2 Weld Transformer are assembled at the factory for
operation at a specific input power line voltage. Serious damage can result if these units are used on
different voltage other than the voltage for which they are wired. The HF2 weld transformer input
voltage must match the HF2 weld control power line voltage.
Use the following table to select the correct power line circuit breaker and wire gauge size. To
minimize peak power losses, use single unbroken wire lines. Note: To minimize peak power losses,
Unitek Peco recommended wire gauge sizes exceed the USA National Electrical Code
recommendations.
3-Phase Service
Voltage (RMS)
3-Phase Service Breaker
Current (RMS)
Copper Wire Gauge Size
(AWG)
208V to 230V
50A
AWG 8 @ 133 strands
380V to 460V
30A
AWG 10 @ 105 strands
Insulation Requirement
Oil-resistant synthetic rubber rated at 90
°
C and 600V.
Power Line Fuse Requirements
Service Voltage
Fuse Size: F1, F2
Unitek Peco P/N
208, 230, 380
3AG, 440 V, 2 A
330-071
460
3AG, 500 V, 2 A
330-100