Hypertherm Powermax45 Service Manual - Manual (Page 26)

Power suPPly setuP
2-4
powermax
45 Service Manual
Install a line-disconnect switch
Use a line-disconnect switch for each power supply so that the operator can turn off the incoming power quickly in an
emergency. Locate the switch so that it is easily accessible to the operator. Installation must be performed by a licensed
electrician according to national and local codes. The interrupt level of the switch must be equal to or exceed the
continuous rating of the fuses. In addition, the switch should:
• Isolate the electrical equipment and disconnect all live conductors from the incoming supply voltage when in the
OFF position.
• Have one OFF and one ON position that are clearly marked with O (OFF) and I (ON).
• Have an external operating handle that can be locked in the OFF position.
• Contain a power-operated mechanism that serves as an emergency stop.
• Have slow-blow fuses installed as recommended in the table on the previous page.
Requirements for grounding
To ensure personal safety, proper operation, and to reduce electromagnetic interference (EMI), the Powermax45 must
be properly grounded:
• The power supply must be grounded through the power cord according to national and local electrical codes.
• Single-phase service must be of the 3-wire type with a green or green/yellow wire for the protective earth ground
and must comply with national and local requirements. do not use a 2-wire service.
• Three-phase service must be of the 4-wire type with a green or green/yellow wire for the protective earth ground
and must comply with national and local requirements.
• Refer to the Safety and Compliance Manual for more information.
Power cord considerations
Powermax45 power supplies are shipped with CSA and CE power cord configurations.
The power cords on the 200–240 V CSA power supplies are shipped with a 50 amp, 250 V plug (NEMA 6-50P) on the
power cord.
The CE power supplies and the 480 V CSA power supplies are shipped without a plug on the power cord. Obtain
the correct plug for your unit (230 V CE, 400 V CE, or 480 V CSA) and location and have it installed by a licensed
electrician.