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Basic Installation and Operation Guide
Chapter 5 - Motor Overload Protection
Solid State Overload Protection
The TE Series Starter provides true U.L. listed I
the main digital processor for maximum motor protection. It simulates the tripping action of a bi-
metallic overload relay, with the accuracy and repeatability of a digital control system. It is adjustable
over a wide range and can be easily programmed for different trip curves.
Thermal Memory
The TE Series microprocessor uses a sophisticated "Thermal Register" in the digital memory to keep
track of motor heating and cooling over time regardless of the starter's power status. By using non-
volatile memory, the TE Series does not "forget" that the motor has been running even if power to the
starter is turned off and back on. Continuous overload protection is provided based on the true thermal
condition of the motor.
Thermal Capacity
The Thermal Register is displayed as a percentage. This percentage is the motor's remaining thermal
capacity. The percentage value begins at 100%; showing that the motor is cool (e.g. motor has 100% of
its capacity available). As the motor heats up or moves toward an overload condition, the percentage
begins to drop. The Thermal Capacity is derived from the programmed motor nameplate Full Load
Amps (FLA) in Function F001, the Service Factor rating in Function F002, and the Overload Trip Class
in Functions F003 and F004. Setting these functions to the proper values provides maximum protection
and eliminates nuisance tripping.
Examples:
H100
100% Thermal
Capacity remaining
at rest
H057
57% Thermal Capacity
remaining after starter
(43% used)
Note:
All TE Series starters are shipped from the factory with F001 set to a default value
of 0000. If F001 is left at the factory default, the unit will not operate. If the user
attempts to start the TE Series without entering the motor nameplate FLA, the
starter will Fault and the display will read "nFLA" (no Full Load Amps).
Disabling the Overload Protection
The Overload Protection feature can be disabled if necessary. Please refer to the Advanced
Installation, Operation and Programming Manual for instructions and considerations before
disabling the Overload Protection.
WARNING!
Do NOT disable Overload Protection unless another Thermal Overload
Protection device exists in the circuit for all three phases. Running a motor
without Overload Protection presents serious risk of motor damage or fire.
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The Remaining Thermal Capacity can be viewed by using the UP or DOWN arrow
keys when in the Status Display mode. From the default Phase A Current screen (dot
on right side), press the UP arrow key 4 times to display [H100] meaning there is
100% of the Thermal Capacity (H = Heat capacity) remaining in the motor. After
starting or running, the motor will use this capacity and the display will show a lower
number. For example, after a cold start, the display may read [H065] which indicates
that the motor has 65% of its thermal capacity remaining (35% used). The Status
Display screens cycle back to the beginning, so the Down arrow keys can get to this
display as well.
Motor Full Load (FLA) Setting
Use Function F001 to enter motor FLA as indicated on the motor nameplate. (Do not
calculate for service factor, this is programmed separately in F002).
TE Series Digital Solid State Soft Starters 18 – 1250A
2
t Thermal Overload Protection as a built-in function of
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