Overload relays are provided to protect motors, motor control apparatuses and motor-branch circuit conductors
against excessive heating due to motor overloads and failure to start. The C306DN3B overload relay is designed for
use with the Cutler-Hammer series non-reversing contactors.
Thermal overload relay features include:
Selectable manual or automatic reset operations
Used with interchangeable Class 20 heater packs + or - 24%
to match motor FLA and calibrated for 1.0 and 1.15 service factors
Integral load lugs allow feild wiring prior to heater pack
Bimetallic, ambient compensated operation
Electrically-isolated normally open or normally closed
Overload trip indication
Fingerproof terminals to reduce possibility of shock
UL-listed, CSA-certified, NEMA-compliant
Overload relay and interchangeable heater packs
Heater packs are used with the C306DN3B overload relay.
The load lugs are built into the overload base to allow load wiring prior to heater pack installation.
Heater pack features include:
Heater packs come in packs of three
Overload protection (in conjunction with the appropriate
Selectable manual or automatic reset
Bimetallic, ambient compensated
More than a dozen models of interchangeable heater packs
(three per pack) are available. The heater packs mount in
the overload relay unit to match motor full load amps.
Cutler-Hammer parts are available for sale
in North America only.