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Page 27
Properly sized overload heaters provide motor protection for the
dryer. Improper heater size may allow the motor to be damaged, or
could cause nuisance tripping.
Heater sizes are listed on the overload heater table on page 27. To use
the table, refer to the motor rating plate and locate the full load amps
(FLA), the service factor (SF), and the ambient temperature (Amb.).
Example
Motor Rating Plate show FLA = 3.8, SF = 1.15, and 60 Deg. C Amb.
From the table, heater size is H-25. Order TU267900—H25.
CAUTION
Overload relays do not provide protection from short circuits.
Short circuit protection is provided by a device such as a
breaker or wall disconnect.
Overload Heaters for Overload Relays
OVERLOAD HEATERS
FOR OVERLOAD
RELAYS