Filter
Top Products
TD - Series
- 45 -
TD Series Digital Solid State Soft Starter 48 - 1250A
2) The Overload Protection trips on Motor Thermal Overload (see Ch.3).
Once the motor has reached full speed, the Current Limit feature becomes inactive.
In the Voltage Ramp Profile, the Voltage output is increased until the Current
Limit is reached. The Ramp Time is the maximum time it will take for the voltage
to increase until the Current Limit setting takes over. Under some load conditions,
Current Limit may be reached before the Ramp Time has expired.
In the Current Ramp Profile, output voltage varies to provide a linear increase in
current up to the Current Limit setting, and Ramp Time is the time that it will take
to get there. A closed loop feedback of motor current allows continuous updating
of the output to maintain this ramp profile.
Because most AC induction motors will not start below 200% current, the current
limit set point is adjustable down to only 200%.. Use this feature to prevent
voltage drop in your electrical supply, portable / emergency generator stalling, or
to satisfy utility restrictions on starting power.
While the TD is in Start mode there is no maximum Current Limit time.
Excessive start time may however lead to motor stalling, causing an
Overload Trip. If this happens, try raising the Current Limit setting to
accommodate your load conditions. If the Current Limit setting cannot
be increased, try using Current Limit without ramping features (“Current
Limit Only” as described previously).
CAUTION