Operators manual for the Pentruder 6-12HF and Pentpak HF-power pack – Original instructions
Page
9
Pentpak high frequency (HF)-power pack
The Pentpak high frequency (HF-)power pack is designed to a new and unique concept. The
electronic units are especially designed for the Pentpak and the power pack is one of the most
compact designs on the market. It offers outstanding performance combined with reliability, safety
and ease of handling.
Depending on voltage and chosen HF-motor there are different HF-power packs.
For 380 – 480 V Input voltage there is the Pentpak 427 for up to 27 kW HF-motor, Pentpak 422 for
up to 22 kW HF-motor (this power pack is no longer sold) and Pentpak 418 for up to 18 kW HF-
motor. For 200 – 230 V Input voltage there is the Pentpak 200 for up to 22 kW HF-motor (400 Hz
input frequency), the Pentpak 218 for up to 18 kW HF-motor and the Pentpak 222 for up to 22 kW
HF-motor. In the following operator’s manual Pentpak HF-power pack or just Pentpak is used to
refer to all of the Pentpak HF-power packs listed above.
New regulations for the design of machines and the specifications for their inherent safety have
been the ruling parameters in the design and development of this power pack.
Design, function and special features of the Pentpak HF-power pack
For optimum safety and manoeuvrability all functions are controlled through a remote control
unit. The operator can therefore always be in the safest and best possible position and still have
full control of the machine.
The remote control system contributes to a high level of safety. All functions are reset
automatically when the power supply is disconnected, or when any of the Emergency Stop-
buttons are depressed. The blade, if in rotation, and in a cut, will continue to rotate because of
its inertia, but will coast to a stop after a few seconds. If the blade is rotating and not in a cut, it
will take longer before the blade stops. No functions remain after the power pack has been shut
off. At every restart the power pack starts from the same initial mode with all functions reset.
The converter is water cooled which provides excellent cooling of the transistor power modules
in the frequency inverter.
If the power pack is run using an inadequate supply of cooling water, it is still protected from
overheating by means of a temperature sensing device inside the power pack.
The Pentpak HF-power pack is compact and weighs only 26 kg, still it can drive the electric
motor with a continuous output of up to 27 kW depending on model.
The power pack has a high overall efficiency factor and at 400 V a 32 Amp delay fuse will be
enough to run the power pack and motor at their maximum rated output. We recommend to use
a 40 Amp fuse if possible. Even 16 Amp (25 Amp for the 27 kW HF-motor) delay fuses can be
used but then the power output must be reduced by turning the feed rate knob on the remote
control.
All electrical and electronic equipment is protected under covers and can not easily be tampered
with. The only device that can be operated is the (green) start and emergency stop buttons.
