SAF OPAL SS6 - Manual (Page 30)

OPAL SS6 Reduced Voltage Starters
Page 23
5.3.2 SHEAR PIN PROTECTION
This feature has been designed to provide motor jam protection, similar to a mechanical
shear pin.
Once the motor has reached full speed, indicated by LD3 being on, the OPAL will trip if the
motor current increases to 300%. The red SHEAR TRIP LED, LD2 will indicate this trip and
is resettable via the red RESET pushbutton on the option card. Link JP2 enables or disables
this optional feature.
5.3.3 ENERGY SAVER
This option is designed to phase back the SCR's under light load, and keep them fully phased
on under medium to full load. This optional feature is intended for use on small motors in
applications where the motor runs under no load for an extensive time but can not be
switched off. The energy save is not effective on motors over 25 HP. The OPAL starter is
designed for repeated starting and stopping. The most efficient operation is to switch the
motor off when ever possible.
Link JP1 enables or disables this optional feature. The red ENERGY SAVE LED, LD1 will
come on to announce that this feature is active. To calibrate this feature, turn RV1, PHASE
BACK ADJUST pot clockwise until the motor starts to become unstable. Once this occurs,
turn the pot slightly counter-clockwise until the motor is again stable. Energy save is not
operational with the use of a bypass contactor.
5.3.4 EXTENDED OVERLOAD
With a high inertia load such as a chipper, a Class 20 overload may not allow enough time
for the motor to reach full speed without nuisance overload tripping.
In such a scenario an extended overload option can be implemented. This allows the motor
500% current for a longer period of time. This option only affects the overload when the
motor is started.
The extended overload is not a factory option and must be specifically requested. Consult
factory for more details.