Which of the following is a proper motor safety measure for working with electric motors?

You should always keep your work area clean and well lit. All motors include many small parts; keep very young children away from your work area. Motors spin very fast; always wear safety goggles. Super Glue, provided with most of the kits, is “instant bonding”.

What are the steps taken to provide electrical safety guidelines for motor?

Safety for single phase motors

Conduct a proper inspection of the motor winding. Perform a power supply test to determine whether there is any problem by the motor. Do not leave a short-circuited battery for long because it would eventually explode. Do not power the motors beyond 12 volts.

How do you measure an electric motor?

Multiply the number of volts by the amperes to calculate the number of watts of the motor. For example, the number of watts of a power screwdriver with a rated voltage of 120 volts and 4 amperes is 480 watts (120 volts x 4.0 amps = 480 watts).

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What safety precautions should be observed for long life of DC 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.

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 motor safety?

You should always keep your work area clean and well lit. All motors include many small parts; keep very young children away from your work area. Motors spin very fast; always wear safety goggles. Super Glue, provided with most of the kits, is “instant bonding”.

Why is safety needed in an organization?

A safe and healthy workplace not only protects workers from injury and illness, it can also lower injury/illness costs, reduce absenteeism and turnover, increase productivity and quality, and raise employee morale. In other words, safety is good for business.

How is electric motor efficiency measured?

The motor efficiency is computed by dividing the estimated mechanical power by the measured electric power.

How do electric motors work?

Electric motors work by converting electrical energy to mechanical energy in order to create motion. Force is generated within the motor through the interaction between a magnetic field and winding alternating (AC) or direct (DC) current. … Electric Motors have an array of applications.

How is electric motor torque measured?

A relatively simple method to estimate electrical motor torque is to measure its electrical power input, the voltage and the current in the power line driving the motor. For most motors, torque is directly proportional to the current and can be derived from it by knowing shaft speed and motor efficiency.

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What is the most important precautions with a DC shunt motor at the time of starting?

26: What is the most important precaution in any experiment with d.c. shunt motor? Answer: Before switching on d.c. supply, a sufficient resistance should be put in series with the armature of the d.c. shunt motor.

What are the precautions that has to be considered while starting a DC shunt motor?

Never open the shunt field of a motor that is running, the loss of field magnetic strength will cause the armature to pull extremely high current and if the motor is not under load, the lack of counter emf will cause the armature rpm to run away, possibly high enough to cause damage.

What safety precautions is required before starting an electric motor?

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.

Which type of protection is provided for electrical motor against over heating?

The thermal protection is present to turn the motor off when excessive heat is generated within the motor circuitry. This safety feature halts the temperature climb before it can burn up the motor. Thermal protectors generally reset themselves once the motor cools down to a safe operating temperature.

What is motor protection schemes?

Motor protection is used to prevent damage to the electrical motor, such as internal faults in the motor. … Motor protection schemes have several protection functions to consider: Motor horsepower rating and type. Supply characteristics such as voltage, phases, method of grounding, and available short-circuit current.

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How do you protect an electric motor from overload current?

Installing overload relays in motor applications will prevent motors from running in overload conditions and can protect your motors from damaging heat.