Rockwell 70-602, Technical Manual

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Series 2000
Step Pulley Drilling Machines
Direct Drive Model - 8 speeds
(375, 600, 900, 1275, 1800, 2400, 3075, 4250 RPM)
INTRODUCTION
T h e s i n g l e a n d t h r e e p h a s e L o w V o l t a g e C o n t r o l
( L V C ) m o t o r s t a r t e r s h a v e b e e n d e s i g n e d e x c l u s i v e l y f o r
use on stationary power tools.
The basic function of a definite purpose starter
is to provide ON-OFF motor control. In addition
to providing ON-OFF control, every motor starter
offers the following features:
MOTOR OVERLOAD PROTECTION -
All starters are supplied with thermal overload
relays which protect the power tool motor from
burnouts due to excessive heat resulting from a
sustained motor overload, extended motor cycling
or stalled rotor.
NO VOLTAGE OR LOW VOLTAGE PROTECTION (LVP) -
No voltage or low voltage protection prevents the
dangerous restarting of a power tool following
a temporary power failure.
Upon a loss of voltage
or a reduction of voltage, the magnetic contactor
in the starter will open.
When power is restored,
the motor will not automatically restart, but must
be manually restarted by pushing the start button
of the ON-OFF switch.
LOW VOLTAGE CONTROL (LVC) -
The definite purpose motor starters provide low
voltage control as a unique safety feature.
The
pushbutton ON-OFF switch operates at a 24 volt
level, not at line voltage. The 24 volt low voltage
control eliminates the possibility of electrical
shock to the operator.
This manual includes a description of the basic LVC
motor starters, instructions for wiring the starters
to the power source, and instructions for changing
the voltage of an LVC motor starter.
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