Motor starter Supplier in Chennai,India

Manual Motor Starters: The starter includes a button (or rotary knob) which allows a user to turn the motor on or off. The mechanism behind the button includes a switch that breaks or makes the circuit to stop or start the motor. This type of starter does not break a control circuit in the event of power loss. It can be dangerous for some applications because the motor restarts automatically when the incoming voltage is restored.

Magnetic motor starters rely on energizing a coil to close and hold the contacts. During a power failure the magnetic starter automatically breaks the control circuit, and the holding contacts open removing power to the motor. A magnetic motor starter includes protection against low voltage & overcurrent. A combination motor starter is an enclosed unit that incorporates disconnects and short circuit protection (in the form of fuses or circuit breakers) together with the components of the motor starter.

They use momentary contact pilot devices such as switches, pushbuttons, relays, float switches, etc. These starters require a restart after a power loss or low voltage condition causes the contactor to drop off. This motor starter can also be wired to restart motors automatically if the application requires it (e.g., a remote pump). A control circuit transformer is used to step incoming power into a lower, safer control circuit voltage.

FVR starters are used in an applications where the motor needs to run in both directions. Reversing can be achieved with pushbuttons with holding contacts, or a maintained selector switch.

This starter incorporates two mechanically interlocked magnetic contactors, which prevent both contactors from closing at the same time. Phases are swapped for forward & reverse direction.

Reduced Voltage Auto Transformer starting is used widely in starting large industrial motors due to its advantage of providing the highest starting torque with lowest starting line current. An Autotransformer Starter is suitable for both star and delta connected motors. This type of motor starting involves inserting an autotransformer in between the motor and the source. The incoming voltage to the autotransformer input is reduced in proportion to the ‘tap’ setting of auto transformer at the output.

Wye-Delta / Star-Delta starters are the most common reduced voltage starters. They reduce the start current applied to the motor during startup as a means of reducing the voltage drop on the electrical supply line. Voltage reduction during Wye-Delta, also known as Star-Delta, starting is achieved by physically reconfiguring the motor windings. During the startup of the motor, windings are connected in Wye / Star configuration, and this reduces the voltage across each winding. This also reduces the torque by a factor of three.

A soft starter is another reduced voltage method. During the typical ramp up phase of a motor, a smooth acceleration of power, instead of a sudden and violent burst of power, reduces the strain put on the motor that could potentially cause damage to the motor and the machine it is operating. Certain applications require a smooth operation that other types of reduced voltage starters cannot provide.

A Variable Frequency Drive ( VFD ) is an electronic device used to vary the frequency of an AC voltage to adjust the speed of an AC motor. VFDs also provide start and stop control, acceleration and deceleration, and overload protection.