Beautiful Work Thermal Overload Relay Connection
It de energies the starter and stops the motor when excessive current is drawn.
Thermal overload relay connection. The designing of this relay can be done by using two dissimilar kinds of metal strips and these strips can be connected mutually as well as enlarge at diverse rates while heated. Thermal overload relay wiring diagram wiring diagram is a simplified welcome pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes and the facility and signal associates together with the devices.
Whenever the strip is heated at a particular temperature then the strip can twist far enough for breaking this circuit. Thermal overload relays 1 lst thermal overload relays overview 1 connection for mounting onto contactors 2 selector switch for manual automatic reset and reset button 3 switch position indicator and test function of the wiring 4 motor current setting 5 stop button 6 transparent sealable cover secures the motor current setting. The function of a thermal overload relay used in motor starter circuits is to prevent the motor from drawing excessive current which is harmful to motor insulation.
It is connected either directly to motor lines or indirectly through current transformers. The bimetallic strip gets heated up by the current directly or indirectly and when the current flow exceeds the set value it bends.