２３
1.3 Power Source Connections
Warning
Thermal Arc advises that this equipment be electrically connected by a
qualified electrician.
ELECTRIC SHOCK can kill; SIGNIFICANT DC VOLTAGE is present after
removal of input power.
DO NOT TOUCH live electrical parts.
SHUT DOWN welding power source, disconnect input power employing
lockout/tagging procedures.
Lockout/tagging procedures consist of padlocking line disconnect switch in
open position.
Removing fuses from fuse box, or shutting off and red-tagging circuit breaker
or other disconnecting device.
1.4. Power Supplier Requirement
Input volt must be standard sine wave, effective value 380V, frequency 50Hz.
Unbalance degree of 3-phase volt must be no more than 5%.
Power supply
Product type
WP120A
Power supply
3 phase
AC380V/50Hz
Min. capacity
Power network
38.5 KVA
Generator
51.4 KVA
Input volt
protection
Fuse
50 A
Circuit breaker
63 A
Cable size
(cross-section)
Input volt
4 mm
2
Output volt
15 mm
2
Ground lead
4 mm
2
Table 3: Power supply connection
Note: The sizes of fuse and breaker in the table are for reference only.
