Principle and Structions
6AM series thermal protector is a current sensitive and temperature
automatic response device.It is connected in series to the winding
of motor.The protector changes with the temperature of winding and
current of a motor.When the heat generated by the increasing
temperature and current from the protected appliances transmits to
bimetal disc and reaching the temperature value of scheduled
movement,the bimetal disc will trip immediately so that the contact
will be switched off and the circuit will be cut off.
When the temperature of motor winding decreases to the rated
temperature value of reposition,bimetal disc will return to its
initial state,the moving contact will be closed and the circuit
will be on.6AM+PTC is the 6AM series thermal protector pulsing PTC
element which can generate heat and connect with contact in
When 6AM protector in the status of close,PTC is in short circuit
and no voltage.When the protected equipment works abnormally,the
contact switches off,and then PTC is generating heat and has
voltage.The heat makes the protector keeping switch off,so
resistance of PTC reaches 10K,which makes the load stay in off.
Only cutting off the electricity and the temperature of PTC
decreased,that can make the protector reset automatically,and the
load restore working normally.
Instructions and applications
6AM series thermal protector has advantages of trip current
sensitively and control temperature precisely.It is applied various
Induction Motor,Universal Motor,transformers,rectipers,electric
tools,automobile motor,electro-thermal appliances and other small
household electrical appliances.
6AM+PTC thermal protector is widely used throughout the world in
electric motors for vacuum cleaners,paper shredders,garden tools