Ross TC700M, Operator'S Manual, Page: 11 / 44

move the Tenderizer by pushing or pulling on the guard assembly can result in misalignment of the
guards. This can result in the safety switches being inoperative, which would prevent the Tenderizer
from operating.
3.3 ELECTRICAL REQUIREMENTS
The Model 700MC Tenderizer can be supplied to operate from any of the standard world wide three
phase line voltages. This would include the following: 208, 220, 230, 240, 380, 415, 440, 460, 480 and
575 volts. The supply frequency can be either 50 or 60 Hz. When the Tenderizer is ordered, the actual
plant line supply must be stated, such as 225 volts at 60 Hz. The tenderizer would then be properly set
up to operate from that electrical supply. A subsequent deviation of up to plus or minus 10% would have
little or no effect on the operation or longevity of the Tenderizer. An exception to this would be to place
an absolute minimum on the operating voltage at 200 volts.
The main drive motor in the 700MC tenderizer will operate from line voltages of 208 through 480 volts at
either 50 or 60 Hz. A different motor is required for operation from 575 volt lines. Changing the
Tenderizer for operation on any voltage between 208 and 480 volts requires only minor changes and can
easily be done in the field. Changing to operation from 575 volt lines requires replacement of the main
drive motor. Replacement of the motor can certainly be done in the field, but it is somewhat involved as
the cam and transmission must be removed to gain access to the motor. Machines supplied for
operation from 575 volt lines are furnished with a motor and transformer designed for that specific
voltage.
The various items that may need to be changed or reconnected to match a particular line voltage are: the
motor itself, the heaters and overload in the motor starter, the phase sensor and line cord. The chart on
page 3-4 illustrates the various items required for different line supplies. The numbers after MAIN
MOTOR refers to the part number of the motor required for the selected supply. The MOTOR WIRING
refers to the connections in the motor junction box for the selected supply. The actual connections are
given on the motor’s nameplate. The numbers after the HEATERS, PHASE SENSOR, LINE CORD
ASSEMBLY AND FUSES refer to the part numbers of the affected parts. The OVERLOAD SETTING
gives the required adjustment of the overload on the motor starter and is given in percentage
corresponding to the dial markings on the overload.
The overload section of the motor starter provides running overload protection for the main drive motor.
Fusing the primary and secondary of the control transformer provides protection of the control circuits
and the head adjusting motor. There is no protection from direct short circuits in the main motor, this
must be provided by the proper external branch circuit protection as defined by the applicable electrical
codes relating to a 2 HP three phase motor.
When operating from any of the low voltage ranges (200 – 240 volts), the branch circuit should be
protected to 20 amps with either dual element (time delay) fuses or a motor rated time delay three pole
circuit breaker. The correct receptacle to be used would be one that meets NEMA L15-20R. The branch
circuit protection required for any of the higher voltage ranges should be 20 amps with either dual
element (time delay) fuses or a time delay circuit breaker. The correct receptacle to be used would be
one that meets NEMA L16-20R for 440-480 volt lines or L17-20R for 575 volt lines.
The Tenderizer is furnished with a power cord made from approximately twenty feet of SO – 4/12 and
terminated with the appropriate plug cap. Substitution of the supplied plug cap with a non-approved type
is entirely at the owner’s risk and any consequence that may result is the owner’s responsibility.
MN700-MC0010
3-2