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Darien Renner
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∙ 7y agoMotor circuit has usually high x sectional area copper winding.it has very low resistance,designed to reduce the copper losses .
As per the ohm's law low resistance offers high current flow in circuit.. in addition to that high voltage contributes high current flow.this results in burning of wndgs.....so we have to provide over voltage protection to motors..tnq...
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∙ 14y agoOverload protection is need on motors to save the motor windings from becoming heat stressed. Overloading a motor means that the motor is operating on a higher current that the nameplate recommends. This condition creates heat in the motor windings. This extra heat reduces the insulation factor on the wires the motor is wound with. If the insulation breaks down the motor coils will become shorted out. Shorted out coils means low resistance between coils and a high current flow and the motor burns out. The overload senses this rise in current and opens the supply voltage to the motor thus shutting the motor off. At this point the cause of the overload should be located and repaired before putting the motor back into operation.
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∙ 12y agomane lak tau
Wiki User
∙ 13y agoEither a fuse or a circuit breaker.
Wiki User
∙ 11y agoover currents can burn out motor
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What is the difference between rated current In and tripped current?
"Rated current" is the current the device (motor or transformer?) is designed to handle at full load. "Tripping current" is the current where a protective device (fuse, breaker) will open to protect the device from overload/overheating. "Tripped current", may be the current the tripping device measured prior to making the decision to trip, if you are reading this from a digital protective device like a relay or OCR.
Who sets standards for motor overload protection?
In Canada it is the CSA, Canadian Standards Association that checks for safety of electrical devices. After testing and when approved, the device will have a CSA designation on the equipment. By law, a Canadian electrician is not allowed to make a connection to any electrical device that doesn't have a CSA certification label attached.
Difference between overload relay and over current relay?
due to the extension of loads they are using the relays for protection.........
What is Selection procedure for motor protection circuit breaker?
The selection of overload protection for motors is taken from a table in the electrical code book. It is based on the full load current rating of the motor.
What is a heater overload?
overload heater is used to protect a large electric motor. If the overload heater get too hot from excessive current. its nomally-closed overload contacts wil open. interruptting the circiut of powe supply of motor
A device with a overload protection used to control a motor is a?
A device with an overload protection used to control a motor is an Overload Relay.
Which electrical wires bring electricity to an electrical device or motor?
which electrical wires bring electricity to an electrical device or motor The cable, otherwise known as the flex or the lead.
What device converts mechanical energy to electrical energy?
name a device that convert the mechanical energy into electrical energy
What is the difference between rated current In and tripped current?
"Rated current" is the current the device (motor or transformer?) is designed to handle at full load. "Tripping current" is the current where a protective device (fuse, breaker) will open to protect the device from overload/overheating. "Tripped current", may be the current the tripping device measured prior to making the decision to trip, if you are reading this from a digital protective device like a relay or OCR.
A device that transforms electrical energy to mechanical energy?
A motor is one example of a device that converts electrical energy into mechanical energy.
Who sets standards for motor overload protection?
In Canada it is the CSA, Canadian Standards Association that checks for safety of electrical devices. After testing and when approved, the device will have a CSA designation on the equipment. By law, a Canadian electrician is not allowed to make a connection to any electrical device that doesn't have a CSA certification label attached.
What is a75hp 2pole 550v electric motor?
An electrical motor is a device that turns electrical energy into mechanical energy.
Which electrical device change electrical energy into mechanical energy?
electric motor
What electric motor?
A electric motor is a device that converts electrical energy into mechanical energy.
What device transforms electrical energy into mechanical energy?
An electric motor, such as a starting motor
Can you start 20kw motor on direct on line circuit?
No, the motor has to be connected to the line voltage through a set of fuses and then an electrical contactor. Also the motor must be thermally protected against overloads by using an overload block or heaters. This is to allow the motor contactor to drop out is a overload fault should occur.
Which electrical device changes electrical energy into mechanical energy?
The motor changes electrical energy into mechanical (torque) energy.
