1.

Motor Load Types
.
A. 
TYPE 1 LOADS:


May
be used up to the HP rating of the converter.*
*Many restrictions apply.
Most applications require sizing the converter a
minimum of 50% larger (see all load types). Contact GROMAX to
verify load type.
For instant reversing (as for rigid tapping),
size according to TYPE
3 LOADS

B. 
TYPE 2
LOADS:


These
include domestic & European lathes without a clutch,
some pumps, wheel balancers, paper cutters, flywheel
driven equipment, air conditioners, blowers, woodworking
band saws, dough mixers, meat grinders, motors rated
below 1000 RPM, etc. Use a converter with HP rating
of at least 50% larger than HP of the motor.

C. 
TYPE 3
LOADS:


These
include Design "E" motors, Taiwanese, Chinese, Brazilian,
Mexican motors, pumps starting under load, etc. Use
a converter with twice the HP rating of the motor.

D. 
TYPE 4 LOADS:


These
include laundry extractors, hoists, elevators, etc.
For these startup loads use a converter with three
times the HP rating of the motor.

E. 
TYPE 5 LOADS:


Often
hydraulic pumps, which come under a momentary load during
use will be loaded well beyond their rated HP for the
brief period of maximum PSI. Examples includes bailers,
compactors, paper cutters, shears, pumps, etc. The HP
of the converter must be at least as high as the actual
HP developed by the motor. To calculate the HP developed,
you must first find the actual amperage drawn during
maximum PSI. This is different from the rated amps of
the motor. Next you would divide the maximum amperage
by 2.8 to find the actual HP being developed by the
motor. That figure is the minimum size of converter
to be used. Example: A 10 HP compactor with a motor
rated at 28 amps but draws a peak of 40 amps momentarily
at maximum compression. Divide 40 by 2.8 = 14.3 HP being
developed, use model R15 Rotary Converter.


2.

Resistive Loads
.
Resistive loads must use the Rotary type converter,
the Static type should never be used because it would
be damaged. There are two methods to determine the HP
of the converter to be used. One method is to take the
amperage rating of the equipment and divide by 2.8 to
find the equivalent HP. The other method is to take
the KW rating and multiply times 1.34 or divide by .75
to find the equivalent HP of the equipment.


3.

Computer, Rectifier
& Transformer Loads
.
Transformers and electric equipment (welders,
lasers, EDM machines, CNC equipment, computers, plating
rectifiers, power supplies, etc.) can operate on the
Rotary Converter. Use the same formula as for resistive
loads to determine the proper size converter to use.
If a 4wire wye input is required (all lines equal voltage
to ground), a three phase deltatowye isolation transformer
must be installed between the converter and the equipment
to change the Delta power to wye power.


4.

Multiple Motor Applications
.
In
some applications it is possible for the Rotary Converter
to run up to 3 times its rated HP provided the motors
are not running heavily loaded. Always contact the factory
for help before attempting to do this.


