BENSHAW RediStart MX3 Series, User Manual

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Motor Service Factor QST 02
LCD Display:
Range 1.00 – 1.99 (Default 1.15)
Description
The Motor Service Factor parameter should be set to the service factor of the motor. The service factor is
used for the overload calculations. If the service factor of the motor is not known, then the service factor
should be set to 1.00.
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NOTE: The NEC (National Electrical Code) does not allow the service factor to be set above 1.40. Check
with other local electrical codes for their requirements.
The National Electrical Code, article 430 Part C, allows for different overload multiplier factors depending on
the motor and operating conditions. NEC section 430-32 outlines the allowable service factor for different
motors.
See Also
Theory of Operation section 7.2, Motor Service Factor on page 147.
Motor Running Overload Class QST 03
LCD Display:
Range
Off, 1 – 40
(Default 10)
Description
The Motor Running Overload Class parameter sets the class of the electronic overload for starting and
running if the Independent Starting / Running Overload parameter is set to "Off". If separate starting versus
running overload classes are desired, set the Independent S/R OL (PFN28) parameter to "On".
The starter stores the thermal overload value as a percentage value between 0 and 100%, with 0% representing
a “cold” overload and 100% representing a tripped overload.
When the parameter is set to "Off", the electronic overload is disabled in all states, starting and running. A
separate motor overload protection device must be supplied.
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NOTE:
Care must be taken not to damage the motor when turning the running overload class off or setting
a high value.
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NOTE: Consult motor manufacturer data to determine the correct motor overload settings.
See Also Independent Starting/Running Overload (PFN28) on page 105.
Motor Starting Overload Class (PFN29) on page 106.
Motor Overload Hot/Cold Ratio (PFN31) on page 107.
Motor Overload Cooling Time (PFN32) on page 108.
Motor OL Alarm Level (PFN33) on page 108.
Motor OL Lockout Level (PFN34) on page 109.
Motor OL Auto Lockout Level (PFN35) on page 110.
Relay Output Configuration (I/O 10-15) on page 112.
Theory of Operation section 7.1, Solid State Motor Overload Protection on page 138.
73
6 - PARAMETER DESCRIPTION
QST: Running OL
03
10
QST: Motor SF
02 1.15