What is the role of holding coil in dc starters?

In DC motor starters, the holding coil serves to maintain the contactor in the closed position once the motor has started. When the starter is activated, the holding coil is energized, which keeps the circuit closed even after the start button is released. This ensures a continuous supply of power to the motor. If the motor encounters an overload or fault, the holding coil de-energizes, opening the circuit and protecting the motor from damage.