Hypertherm HyPrecision 100D, Instruction Manual

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5.3 Motors
WARNING
Always make certain the electrical current is shut off and lockout/tag-out
procedures have been followed before starting any service or maintenance
procedures.
IMPORTANT
In the event of any kind of overload fault, always determine what caused the fault
before starting up the motor again.
The main motor is the backbone of the HyPrecision 100D/150D Intensifier Pump. The motor transfers
rotation through a jaw type coupling to the main pump, which is through-shafted to the gear pump.
Motor Starter Circuits and Thermal Overloads
Hypertherm pumps are equipped with different starter circuits depending on the size of pump and the
inrush current requirements. All motor starter circuits have thermal overload protection to keep the
motor from overheating and causing irreparable damage. Main motor starter circuits utilize soft starters.
Softstarter with Bypass Contactor
HyPrecision 100D/150D are equipped with a Softstarter. This is considered a reduced voltage class of
starter. When the motor is turned on through the operator interface or from a remote signal, the
Softstarter ramps the motor up to speed over a factory set amount of time. After the starter reaches the
Top of Ramp (TOR) it switches the load to a bypass contactor.
The Softstarter monitors a large variety of conditions including
calculated or actual motor temperature and will trigger a motor
fault shutdown in the event conditions occur that exceed the
factory-preset values. The fault may be cleared from the
operator interface by pressing RESET on the alarm screen. If
the condition that caused the fault remains present, you will not
be able to reset until the condition is corrected.
For example, if the motor shuts down due to a thermal overload condition you will not be able to reset
the fault until the motor cools below the preset level. The Softstarter is locked and it will require a
password to change any factory set values. If you need Softstarter assistance, please contact an
authorized Hypertherm Service Center.
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