PROGRAMMABLE PARAMETERS
The following settings MUST be programmed by the user in order to provide proper protection for
the application. All parameters are actual values except for CUB, which is programmed as a
percentage. The programmable range for each parameter can be found on the specifications table
on page 13. See page 9 for a
programming example.
MULT
- MULT (multiplier) is
determined by the current the
unit will be monitoring and can
be found in Table 1. This
allows the unit to display the
correct current. Changing this
setting will also change the
OC, and FLA setpoints
.
HP -
HP (horsepower) should be
set according to the hp rating on the nameplate of the motor. This setting is required for
proper operation of the Model 777-AccuPower. The unit can be set from .10-50hp; dial in
the closest available setting (select 50 if the motor is greater than 50hp.)
FLA
-
FLA (full load amps) is the current drawn while the motor is running normally and
can be read from the nameplate. EFF is automatically calculated and set when HP and
FLA are programmed, so if FLA is not entered, EFF must be programmed manually.
EFF/PF
- EFF/PF (efficiency/power factor) can be found on the motor’s nameplate or
manufacturer’s specification sheet. If the efficiency rating is available, it is best to enter it;
and FLA should be set to 0. If the efficiency is not available, it will automatically be
calculated and set according to the HP and FLA settings. Power factor can also be
entered according to the motor’s nameplate or manufacturer’s specification sheet, and
should be entered if available.
OC
-
OC (overcurrent) is usually set at the service factor amperage (typically 100-115% of
motor FLA) of the motor, which is determined by the motor manufacturer. If any one leg of
current exceeds the OC setting, the unit will follow its overload trip curve (see Figure 4).
TC
-
TC (trip class) is the parameter used to determine when the unit will trip when an overload
condition is detected. For standard motors, the TC is typically set at 20. The motor
manufacturer should be contacted for exact TC settings. Table 4 and Figure 4 show the
range of TC settings and trip times.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
