What precautions should be taken when working with a DC motor?
(DC shunt motor maintains almost constant speed from no load to full load). DC series motor should always require to be loaded before starting the motor. Therefore series motors are not suited for the applications where load on the motor is completely removed and where motors are driving the belts.
What safety precaution should be taken when starting an electric motor?
9. What safety precautions should be taken when starting a large electric motor whose coupling is disconnected? Place all tools away from coupling or pulley, and stand well to the side of the motor.
What are the precautions to be taken in the case of energy efficient motor application?
When power is applied, the motor should start up quickly and run smoothly. If it doesn’t, visually check the mechanical assembly. If the motor vibrates excessively, turn off power to the motor using proper lockout procedures.
What are the safety precaution while working?
Here are some ways you can work to stay safe on the job.
- Be Aware. …
- Maintain Correct Posture. …
- Take Breaks Regularly. …
- Use Equipment Properly. …
- Locate Emergency Exits. …
- Report Safety Concerns. …
- Practice Effective Housekeeping. …
- Make Use of Mechanical Aids.
What precautions should be taken when operating a universal motor?
Do not pull or pinch lead wires while the power is on. This may can cause an electric shock. Also, do not touch connectors or other live parts while the power is on. Failure to observe this may result in electric shocks.
Why do electric motors fail?
Common causes of winding failure include high temperature, too many starts, contamination, too much current, excessive voltage and physical damage. … Shaft failure is the least common cause of motor failure. Physical damage, corrosion, improper installation and excessive loads are often the root cause.
What should you do before using any tool?
Remove any wrenches and adjusting tools before turning on a tool. Inspect the cord for fraying or damage before each use. Tag defective tools clearly with an “Out of service” tag and replace immediately with a tool in good running order. During use, keep power cords clear of tools and the path that the tool will take.
What are three types of motor protection devices?
Types of motor protection device
- Overload protection.
- Short circuit protection.
- Over temperature protection.
- Under Voltage protection.
- Phase failure and reversal protection.
What is the most effective method of controlling electrical equipment to conserve energy?
Turn off lights in rooms when not in use and also during day time at which sufficient illumination is present. Use the Microwave ovens for short cooking times. It is also better to replace them with the solar-type of equipment. Put the air-conditioners in OFF mode particularly when you are out of the home.
What is energy efficient technology?
Energy Efficient Technologies in Electrical Systems: Maximum demand controllers, Automatic power factor controllers, Energy efficient motors, Soft starters with energy saver, Variable speed drives, Energy efficient transformers, Electronic ballast, Occupancy sensors, Energy efficient lighting controls, Energy saving …