Crafstman 196.205070 Manual Del Propietário página 8

DESCRIPTION
Your new Plasma Cutter is designed as a
clean, distortion free means of cutting
through metal, up to 3/16 inch thick.The
plasma cutter power generator consists of a
transformer a rectifying unit and a PC Board.
The PC Board controls the unit safeguards
and governs the work cycles of the various
components which make up the unit, such as
the solenoid valve, the power contactor, etc.
Table 1 lists your Plasma Cutter specifica-
tions.
Table 1. Plasma Cutter Specifications
Primary (input) volts 220 Vac
Primary (input) Amps 25
Phase Single
Frequency 60Hz
Secondary (output) volts 100
Secondary (UL output) amps 25
Open Circuit Volts (Max.) 300 Vdc
Duty Cycle Rating 15%
PLASMA CUTTER OPERATING
CHARACTERISTICS
DUTY CYCLE
The duty cycle rating of a plasma cutter
defines how long the operator can cut and
how long the unit must be rested and cooled.
Duty cycle is expressed as a percentage of
10 minutes and represents the maximum
cutting time allowed. The balance of the 10-
minute cycle is required for cooling.
This plasma cutter has a duty cycle rating of
15% at the rated output. This means that you
can cut for 1.5 minutes out of 10 with the
remaining 8.5 minutes required for cooling.
INTERNAL THERMAL PROTECTION
CAUTION
Do not constantly exceed the duty cycle or
damage to the unit can result.
If you exceed the duty cycle of the plasma
cutter, an internal thermal protector wilt open,
shutting off all functions except the cooling
fan. If this happens, DO NOT SHUT OFF
THE UNIT. Leave the unit turned on with the
fan running. After cooling, the thermal protec-
tor wilt automatically reset and the unit will
function normally again. However you should
wait at least ten minutes after the thermal
protector opens before resuming work. You
must do this even if the thermal protector
resets itself before the ten minutes is up or
you may experience less than specified duty
cycle performance.
PNEUMATIC PROTECTION
A pneumatic device prevents damage to the
torch due to switching on with either no air
supply or low air pressure. An amber light on
the front panel lights up when the pneumatic
device intervenes. (See Figure 1)
ELECTRIC SHOCK PROTECTION
An electric shock protection device prevents
the operator from coming into contact with
electrically live parts of the torch (such as the
electrode, etc.). This consists of a safety
device, built into the body of the torch, which
breaks the main power circuit when the end
part of the torch is removed to replace the
electrode or the nozzle.
Note: When the electrical protection device
is activated, the unit is prevented from
operating.