Thrust Overload
Screen
(EPS06 only):
Display Functions:
Speed Sensor Function
Enabled or Disabled
Shut off RPM Setting
Startup Delay Time Forward
Startup Delay Time Reverse
Input Functions:
Enable Thrust Overload
Function
Disable Thrust Overload
Function
Set Startup Delay Time
Forward
Set Startup Delay Time
Reverse
Thrust Overload Function:
The thrust
overload function screen enables and
disables the thrust overload protection of the
actuator. With the “Thrust Overload
Function” enabled the sensor head RPM
value will be constantly compared with the
preset “Thrust Limit RPM Value”. The user
command signals “Extend” and “Retract”
have to be wired into the binary input signals
X101 pin 1 and 2 of the EPS06. As soon as
the forward or reverse auxiliary contacts of
the reversing motor contactor or VFD circuit
are pulled in, the on-delay timer with the
predefined “Motor Rush in Time Delay
Retract / Extend” time setpoint is started. As
soon as the retract / extend time delay is
expired, which is the startup time of the
actuator motor, the RPM value will be
supervised until the reversing motor
starter is turned off. If during this time
period the actual RPM value dips below
the setpoint both end of stroke limit
output signals will be turned off, which
will turn off the power supplied to the
actuator via the reversing motor starter
or VFD. The “Thrust Limit RPM
Value” is factory set and varies by
actuator size, nominal thrust rating,
selected motor size and operating
conditions. Readjusting these values
may
defeat
the
thrust
overload
protection of the actuator and the
attached equipment.
