BENSHAW RediStart EXEXMVRMX3 Series, User Manual

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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 122.
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 Indep S/R OL (PFN 28) parameter is set to "Off". If separate starting versus running overload
classes are desired, set the Indep S/R OL (PFN 28) 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 (PFN 28) on page 86.
Motor Starting Overload Class (PFN 29) on page 87.
Motor Overload Hot/Cold Ratio (PFN 31) on page 88.
Motor Overload Cooling Time (PFN 32) on page 88.
Motor OL Alarm Level (PFN 33) on page 89.
Motor OL Lockout Level (PFN 34) on page 89.
Motor OL Auto Lockout Level (PFN 35) on page 89.
Relay Output Configuration (I/O 10-15) on page 91.
Theory of Operation section 7.1, Solid State Motor Overload Protection on page 114.
Local Source QST 04
LCD Display
Range LCD Description
Keypad The start/stop control is from the keypad.
Terminal The start/stop control is from the terminal strip inputs. (Default)
Serial The start/stop control is from the network.
Description The EXMVRMX
3
can have three sources of start and stop control: Terminal, Keypad and Serial. Two
parameters, Local Source (QST 04) and Remote Source (QST 05) select the source of the start and stop
control.
If a digital input is programmed as Local / Remote, then that input selects the control source. When the input
is low, the local source is used. When the input is high, the remote source is used. If no digital input is
59
6 - PARAMETER DESCRIPTION
QST: Running OL
03
10
QST: Local Src
04
Terminal