Toshiba VF010H05 - Manual (Page 37)

JKSSS+ Series - 31
JKSSS+ Series 2.3 - 4.2KV
Shock Wave is avoided. When the output voltage to the motor is low enough to no longer
be needed, the soft starter will end the Decel cycle and turn itself off.
Another common application for decel control is on material handling conveyors as a
means to prevent sudden stops that may cause products to fall over or to bump into one
another. In overhead crane applications, soft stopping of the Bridge or Trolley can prevent
loads from beginning to over swing on sudden stops.
3.4.1 Start Deceleration Voltage
Factory Setting = 60% of line voltage
Range = 0% - 100% of line voltage
The step down voltage adjustment eliminates the dead band in the deceleration mode
that is experienced while the voltage drops to a level where the motor deceleration is
responsive to decreased voltage. This feature allows for an instantaneous drop in volt-
age when deceleration is initiated.
3.4.2 Stop Deceleration Voltage
Factory Setting = 20% of line voltage
Range = 0% - 100% of line voltage
The stop voltage level setpoint is where the deceleration voltage drops to zero.
3.4.3 Deceleration Time
Factory Setting = 5 sec.
Range = 0 - 60 sec.
The deceleration ramp time adjusts the time it takes to reach the stop voltage level set
point. The unit should be restarted and stopped to verify that the desired deceleration
time has been achieved.
DO NOT ExCEED THE MOTOR MANUFACTURER’S RECOMMENDED
NUMBER OF STARTS PER HOUR. WHEN CALCULATING THE
NUMBER OF STARTS PER HOUR, A DECEL CURVE SHOULD BE
COUNTED AS A START CURVE. FOR ExAMPLE: RECOMMENDED
NUMBER OF STARTS PER HOUR = 6, ALLOWABLE STARTS WITH
DECEL CyCLE PER HOUR = 3.
3.5 Sequence of Normal Operation
• Apply control power and check that the “Power” LED comes on. (Display 1)
• Apply three phase power to the unit. The motor should run only when the
start command is applied.
• Apply the start command. (Display 2). The RUN LED will be lit. (Display 3)
The AUX3 LED will be lit. If the motor does not enter run mode in the
set time (Acceleration time limit, see SP8.2), a trip will occur.
WARNING