Technical information

5 – PARAMETER DESCRIPTIONS
47
P8 Ramp Time 1 QST 08, CFN02
LCD Display
QST: Ramp Time 1
08 15 sec
CFN: Ramp Time 1
02 15 sec
Range 0 – 300 seconds (Default 15 seconds)
Description The Ramp Time 1 parameter is the time it takes for the starter to allow the current, voltage, torque or
power (depending on the start mode) to go from its initial to the maximum value. To make the motor
accelerate faster, decrease the ramp time. To make the motor accelerate slower, increase the ramp
time.
A typical ramp time setting is from 15 to 30 seconds.
If the ramp time expires before the motor reaches full speed, the starter maintains the maximum
current level until either the motor reaches full speed, the UTS timer expires, or the motor thermal
overload trips.
NOTE: Setting the ramp time to a specific value does not necessarily mean that the motor will take
this time to accelerate to full speed. The motor and load may achieve full speed before the ramp time
expires if the application does not require the set ramp time and maximum current to reach full speed.
Alternatively, the motor and load may take longer than the set ramp time to achieve full speed.
See Also Initial Current 1 parameter on page 45
Maximum Current 1 parameter on page 46
Up To Speed Time parameter on page 48
Kick Level 1 parameter on page 52
Kick Time 1 parameter on page 52
Start Mode parameter on page 49
Theory of Operation section 8.3.1, Current Ramp Settings, Ramps and Times, on page 118