Electrical Motor Control Wirings

This blog contains several Electrical Motor Control Wirings, and Operations.

  • Delayed Automatic Forward Reverse Motion of Overhead Crane Driven by a Motor

    This is another situation that requires the overhead crane to rest for a while upon reaching both of the rail. After a pre-determine time the overhead crane will re-start in the opposite direction.

  • Limiting the Forward and Reverse Motion of an overhead crane driven by a motor

    The motion of an overhead crane moving forward and reverse can be automatically stop at both end by placing a limit switches X and Y in the control circuit of the Forward – Reverse Motor Control shown in Figure below (d).

  • Automatic Forward and Reverse Motion of Overhead Crane Driven by a Motor

    Notice that when contact (1-2) of limit switch X opens to de-energized contactor F, its contact (1-3) will almost simultaneously closed to energized the contactor R. This will bring about the automatic reversal of the overhead crane from the left to the right.

  • Forward Reverse Motor Control

    The forward reverse motor control is used i a system where forward and backward or upward and downward movement in the operation are needed.

  • WYE-DELTA REDUCE VOLTAGE STARTER

    Some motors starters at high current more than several times its current at full load condition. The effect of this to other is necessary tripping of circuit breakers. One way of reducing the high starting current of a motor is the start the motor with the low voltage at its winding. After a few seconds, when the motor is already running at its stable condition, the rated full voltage is applied to its winding. This system is called reduced voltage starting.

Monday, 6 February 2017

INSTALLATION OF LIGHTING FIXTURE

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Tools and materials you need


Tools:

  • Wire cutters
  • Electrical tester
  • Ladder
  • Screwdrivers (flat-head and Phillips)
  • Adjustable wrench
  • Pliers
  • Pencil

Materials:

  • Light Fixture
  • Metal outlet box
  • Wire nuts
  • Electrical tape

Installing a ceiling fixture does not have to be a daunting task. Technically, lighting fixtures have only three wires--two live wires and one ground- to connect, so as long as the power is turned off, this can be a do-it-yourself project.


PROCEDURE IN INSTALLING LIGHTING FIXTURE

1. Cut the power to the existing light fixture in the ceiling at the house fuse or panel box.

Cut the power to the existing light fixture in the ceiling at the house fuse or panel box.


2. Fasten the mounting plate to electrical box. The fixture you purchased will have its own mounting bracket and screws and wire nuts.

Fasten the mounting plate to electrical box. The fixture you purchased will have its own mounting bracket and screws and wire nuts.


3. Clip the ends of the wires with a wire cutter. Use the wire stripper to remove the protective coating and expose fresh wire so the connection will be sound.

Clip the ends of the wires with a wire cutter. Use the wire stripper to remove the protective coating and expose fresh wire so the connection will be sound.


4. Attach fixture wires to the wires of the electrical box using supplied wire nuts. Match color for color.

Attach fixture wires to the wires of the electrical box using supplied wire nuts. Match color for color.


5. Align the openings of fixture to the mounting plate and attach using the supplied screws.

Align the openings of fixture to the mounting plate and attach using the supplied screws.


6. Screw in the light bulbs and attached the globe. Make sure not to overtighten the cap or nut that holds the globe in place. Having it too tight can cause the globe to crack.

Screw in the light bulbs and attached the globe. Make sure not to overtighten the cap or nut that holds the globe in place. Having it too tight can cause the globe to crack.


7. Turn on power to the room and flip the light switch to check the installation.

Turn on power to the room and flip the light switch to check the installation.

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