TE2 Series Digital Solid State Soft Starter User Manual 76 | Page
F025 = Begin Decel Level (BDL)
Factory Setting = 60%
Range = 0 - 100% of line voltage
Used to drop voltage to a level where there is a noticeable
effect on motor torque during Deceleration mode. Generally,
systems with high head pressure need to start Deceleration
near the top of the ramp (85 - 95%). Low head systems can
drop to lower settings (50 - 60%). System conditions vary
greatly by pump type, pipe size, and system head. Some
experimentation with settings may be necessary.
F026 = Decel Shut Off Voltage
Factory Setting = 30%
Range = 0 to (BDL -1) %
Sets the level where the starter is turned off, corresponding to
where motor torque during Deceleration is no longer effective.
This function is used to shut the motor off once the check valve
closes. Again, because systems vary greatly this setting may
require adjustment several times. If you cannot hear or see the
check valve close, observe fluid pressure or flow if available.
F027 = Decel Ramp Time
Factory Setting = 10 seconds
Range = 1 - 60 seconds
Sets the time for the deceleration ramp to go from the Begin
Deceleration Level setting (F026) to the Deceleration Shut Off
Voltage (F027). This function is used to dampen the effect of
reducing pump torque as much as possible. If the check valve
still slams at the end of ramp, try extending this time function a
little. Since motor heating increases as voltage is lowered, the
setting should not exceed the time necessary to achieve the
deceleration effect.
Note:
When using the Deceleration function, count these cycles as
additional “starts” when determining maximum starts-per-hour.
Other Applications:
Another common application for Deceleration control is on material
handling conveyors as a means to prevent sudden stops that may
cause products to shift, 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.
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