BENSHAW RediStart MX3 Series, User Manual

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110
6 - PARAMETER DESCRIPTION
Motor OL Auto Lockout Level PFN 35
LCD Display
Range Off, Auto (Default Off)
Description The MX
3
has the capability to automatically calculate a motor OL lockout release level. This level shall be
calculated so that the OL lockout is cleared when there is enough OL content available to start the motor
without tripping the OL. This prevents the motor from being started if the O/L will trip during the start.
The value shall be calculated based on OL content used for the past four (4) successful motor starts. A factor
of 1.25 shall be applied as a safety margin.
Example:
The OL content used for the past 4 starts were 30%, 29%, 30%, 27%
Average OL content used is 29% (using integer math).
Multiply result by 1.25 -> 36%
The new calculated motor OL lockout release level will be 100% - 36% -> 64%
The starting OL% content shall be latched when a start command is given. A value for OL content used
during a start shall only be added to the list if the motor start fully completes the start (i.e. the starter reaches
up to speed).
z
NOTE:
This feature should not be used on systems where the starting load varies greatly from start to
start.
z
NOTE:
The OL does not have to reach 100% for the lockout to occur.
See Also Motor OL Lockout Level (PFN34) on page 109.
Theory of Operation 7.1, Solid State Motor Overload Protection on page 138.
Jump to Parameter I/O 00
LCD Display
Description By changing the value of this parameter and pressing [ENTER], you can jump directly to any parameter
within the group.
PFN: OL Lock Calc
35
Off
I/O: Jump Code
00 1