Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 29)

SPECIFICATIONS
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HT4001
Instruction Manual
Description
Hypertherm’s HT4001 is a machine-mounted plasma cutting system for cutting most metals from gauge to three-
inch (76 mm) thick (when used with the optional slave configuration). A micro-controller on the power supply control
board helps to provide extended life for the oxygen consumable parts. To achieve consumable long life, all cuts
must begin and end on the plate surface when cutting with oxygen as the plasma gas; this allows for the proper
ramping of gases and DC current to extend the life of the torch nozzle and electrode. See also How to get Longer
Consumable Life in Section 5.
The HT4001 power supply provides continuously variable output current of up to 400 amps for optimum cutting on
all thicknesses of metal up to two-inches thick. When configured with a slave power supply, the HT4001 system
provides continuously variable output current of up to 760 amps for cutting metal up to three-inches thick. This
allows the operator wide variations in cutting speeds on the same thickness of metal. Five nozzle sizes produce
high-quality cuts throughout the range of cut thicknesses.
The plasma gases used with the HT4001 system are oxygen, for cutting mild steel, and nitrogen, for cutting
stainless steel, aluminum and other non-ferrous materials.
The following descriptions briefly describe the purpose and configuration of the HT4001 System components.
HT4001 Power Supply
This unit houses four 100-amp, 15 kHz chopper power supplies to produce constant current DC output. Also
located in this unit is the torch height control (THC). The power supply interconnects with the remote high
frequency console, initial height sensing, computer interface, remote voltage/current, water muffler, gas console,
the timer-counter, the workpiece, other HT4001 supplies (for multi-torch use) and optional slave unit (to output up
to 750 Amps).
Remote High Frequency (RHF) Console
This unit houses the high-frequency starting circuit that initializes the plasma arc at the torch. Having the high-
frequency circuit in its own enclosure permits more effective RF shielding and allows the power supply to be
installed at a distance of up to 300 feet (91.5 m) from the torch. Also located in the console are two door interlock
switches, a cooling water flow switch, injection water flow switch, the pilot arc relay and injection water valve. The
RHF console interfaces with the power supply, gas console, water chiller, and the torch.