A terminal block is a screw-type electrical connector where the wires are clamped to the metal part by a screw.
It is used for the protection against electrical leakage in the circuit. When somebody gets an electric shock or the residual current of the circuit exceeds the fixed value, ELCB cuts off the power within the time of 0.1 s automatically protecting the personal safety and preventing the equipment from the fault.
ELCB also protects the circuit against overload and short-circuit.
It is used for protecting the circuit against overload and short circuit. It can be used in lighting and electric motor distribution systems.
It is used to control electric energy in the distribution network and is having overhead and short circuit protection.
A contactor is an electrically-controlled switch used for switching an electrical power circuit.
A contactor is typically controlled by a circuit, which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch.
Star-Delta starter is generally used for controlling motors above 7.5 hp and consist of following:
One main contactor
One star contactor
One delta contactor
One on-delay timer
One overload relay
Set of auxiliary control contacts