EX-TRAFIRE
®
75SD
Operator Manual, Revision T-5
3-20
Power supply location
Place the plasma arc power supply EX-TRAFIRE
®
75SD on a flat even surface with a minimum
distance of 0�5m of clear space all round to ensure good ventilation�
Mains power connection
The EX-TRAFIRE
®
75SD plasma arc power supply requires a 400 VAC ±15% three-phases mains
power source (or 220 VAC ±15% for 3 x 220 V power supply)� Use a circuit breaker for power
line input so that the operator can turn off the power supply quickly in an emergency� Locate the
switch so that it is easily accessible to the operator� The interrupt level of the switch must be equal
to or exceed the continuous rating of the fuses� Use slow blow fuses with a suitable capacity in
accordance with local and national electrical codes�
Connecting to an engine drive power generator
When using an engine drive generator to power the EX-TRAFIRE
®
75SD:
•
Engine drive operation;
1� Set engine drive output to three-phases AC�
2� Plug the EX-TRAFIRE
®
75SD mains power lead in to the power outlet�
3� Hard wire connection (No plug fitted) should be performed by a certified electrician�
4� Set the engine drive to maximum output (see chart below)�
5� For optimum performance, do not share the engine drive with other equipment such as
welding plant, lighting systems or angle grinders�
Three-phases, 50/60 Hz, 400 VAC ±15% (220 VAC ±15%)
Engine drive rating
Current output
EX-TRAFIRE 75SD Performance
21 kW
75 A
Full arc stretch
19�5 kW
75 A
Limited arc stretch
Grounding
To reduce electromagnetic interference (EMI) and to ensure personal safety and correct operation,
the EX-TRAFIRE
®
75SD must be properly grounded through the mains power lead in accordance with
local and national electrical codes of practice� The three-phases service must be of the 4-wire type
with a protective green-yellow wire for protective earth ground and must comply with national and
local electrical codes of practice�
