Principle and Structions
17AM-X 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.
17AM-X+PTC is the 17AM-X series thermal protector pulsing PTC
element which can generate heat and connect with contact in
parallel.When 17AM-X 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
Instructions and applications
17AM-X series thermal protector has advantages of trip current
sensitively and control temperature precisely.It is applied in
various Induction Motor,Universal
motor,electro-thermal appliances and etc.
17AM-X+PTC thermal protector is widely used throughout the world in
electric motors for vacuum cleaners,paper shredders,garden tools
and high-power pumps.