Tweco FP-55 - Manual (Page 15)

Manual 0-2846 2-1 INTRODUCTION
SECTION 2:
INTRODUCTION
2.01 Scope of Manual
This manual contains descriptions, operating instructions
and basic maintenance procedures for the Firepower
FP-55 Plasma Cutting Power Supply only. Servicing of
this equipment is restricted to properly trained person-
nel; unqualified personnel are strictly cautioned against
attempting repairs or adjustments not covered in this
manual, at the risk of voiding the Warranty.
Read this manual thoroughly. A complete understand-
ing of the characteristics and capabilities of this equip-
ment will assure the dependable operation for which it
was designed.
NOTE
Refer to the Torch Manual provided with this Power
Supply for torch and cutting information.
2.02 General Description
The power supply provides 40 amp maximum output and
includes all control circuitry, electrical and gas inputs and
outputs, pilot circuitry, primary input power cable with
molded plug, and
work cable & clamp.
Refer to Section 2.04 for power supply options and ac-
cessories.
A-02766
Figure 2-1 Firepower FP-55 Power Supply
2.03 Specifications/Design Features
A. Power Supply Technical Specifications
The following specifications apply to the Power Supply
only:
1. Front Panel Features
• Main power ON/OFF switch
• RUN/SET switch
• output current control
• torch leads access
• work lead
2. Rear Panel Features
• Primary input power cable with molded plug
• gas pressure gauge regulator/filter assembly
• gas supply connection
3. Front Panel Indicators
AC, TEMP, GAS, DC
4. Input Power (See Note)
208/230VAC (±10%), 60 Hz, Single Phase, 39/37 amps
NOTE
Refer to Appendix 1 for input wiring requirements.
5. Output Power
Continuously variable from 20 to 40 amps maximum
6. Duty Cycle (see NOTE)
NOTE
The duty cycle will be reduced if the primary in-
put voltage (AC) is low or the DC voltage is higher
than shown in the chart.
Ambient
Temperature
104° F
(40° C)
104° F
(40° C)
104° F
(40° C)
Duty Cycle 40% 60% 100%
Current 40 Amps n/a 25 Amps
DC Voltage 96 vdc n/a 96 vdc
Power Supply Duty Cycle
7. Pilot Circuitry
Capacitive Discharge (CD), Ignition DC Pilot