Q:

What is a star-delta starter?

A:

A star-delta starter is a device that enhances the efficiency of a three-phase motor. The device limits the electrical current to the motor on startup while allowing full voltage when the motor reaches full speed.

The electrical current required to start any heavy-duty electric motor may be four times greater than its normal operating power requirement. When a three-phase motor starts up it is necessary to regulate this electrical current, changing the connections from "star" to "delta" at exactly the right moment. A star-delta starter is a special circuit that regulates these winding electrical configurations. As the most commonly used reduced voltage starters, the star-delta starter reduces startup wear and tear on motors, making them last longer.


Is this answer helpful?

Similar Questions

  • Q:

    What is the difference between a 2- and 4-ohm car speaker?

    A:

    The difference between a 2-ohm speaker and a 4-ohm speaker is the amount of sound each device generates. The speaker itself in a car serves to amplify sound. The number of ohms reduces the sound as it climbs.

    Full Answer >
    Filed Under:
  • Q:

    How do I reset my Emerson Bluetooth?

    A:

    An Emerson Bluetooth headset can be reset by syncing it with a phone or other device. If the Bluetooth is already synced to a device, it is possible to add a new device by switching the Bluetooth off and setting it to visibility mode, allowing the device to find it.

    Full Answer >
    Filed Under:
  • Q:

    Where can I sell my old camera?

    A:

    Several websites and online stores allow users to sell or trade in old cameras and other electronics. NextWorth and Gazelle are two examples. Both are affiliated with reputable merchants: Target in the case of NextWorth, and Walmart and Office Depot in the case of Gazelle.

    Full Answer >
    Filed Under:
  • Q:

    How can I disable a vehicle tracker?

    A:

    Vehicle trackers are disabled by emitting radio waves that block the ability of signals to travel between the GPS tracker and satellites, called jamming; by spoofing, which is emitting erroneous signals to be confused with the signals sent by the tracker; and by blocking wireless signals. A vehicle tracker can also be disabled by covering it with metal.

    Full Answer >
    Filed Under:

Explore