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service factor of motor is 1.00 or 1.15 .
almost all electric motors rated at 1.5 horsepower or more have a service factor of 1.15 or greater. a motor with a 1.00 service factor is usually a very small motor like an exhaust fan in residential bathroom. if a motor has 1.00 service factor all that means is that it can only operate at 100% of its rated amperage. a motor with a 1.15 service factor can periodically be run at 115% of its rated amperage without damaging the motor.
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Where is the best place to look to find specific information about a motor such as horsepower voltage full load current service factor and full load speed?
Index or Glossary
What is the effect of induction motor on power factor?
An induction motor has a lagging power factor. Motors of more than about 2 HP are designed to have a power factor of 0.85 or higher.
When a load on a normally excited synchronous motor is increased its power factor tends to?
power factor normally goes to the lagging
How do you control speed of a motor?
first do you reduce the voltage level or increase the load factor
Load test on 3 phase induction motor?
When you do a load test on a 3-phase induction motor you are checking the power factor, viz slip, and efficiency of the motor. You can test various loads with this test.
What is the relationshi between a motors service factor and amperage rating?
A motor's service factor is a multiplier applied to a motor's horsepower rating to indicate the level of overload it can handle. The motor's nameplate amperage rating indicates the maximum current it should draw under normal operating conditions. The service factor does not directly impact the amperage rating, but motors with a higher service factor may be capable of handling higher loads and thus draw more current.
How do you calculate gearbox service factor?
Service factor is gearbox horsepower rating over motor horsepower.
What is the difference between Full load Amps and Service Factor Amps on an electric motor?
Full load amps is the amperage at which the motor was designed to work at to achieve its rated horsepower. Service factor amps is the amount of a periodic overload at which a motor can operate without overload or damage. Continuous operation within the service factor amps will shorten the insulation and motor bearing life of the motor as the motor will be operating at a higher temperature than it was designed to.
How do you calculate service factor of a motor?
The motor's manufacturer is the one who decides how much overloading can be done to their product. As different motors are wound for different applications the motor's engineering department decides what the specifications of each motor type should be. The most common service factor is 1.15. On the motor's nameplate it will be shown as SF 1.15.
By how many amps may a three phase motor exceed its data plate rating?
On a normal three phase motor on the nameplate there is a value in the S.F. box. This is the service factor. Depending on the size of the motor this value will vary. Smaller size motors usually have a service factor of 1.15.See related links below.
Minimum acceptable value of power factor FOR LIGHTING and MOTOR CIRCUITS?
Usually for a power factor lower that 90% a service charge will be added to the monthly electrical bill. On power factor correction calculations try to get the power factor up to 95%.
What is the power factor of an induction motor?
Induction motor comprised inductor as the most part in it and an inductor has the characteristic to oppose the change of current, i.e., it has lagging power factor as current lags behind the voltage. Hence, an induction motor works on lagging power factor.
Where is the best place to look to find specific information about a motor such as horsepower voltage full load current service factor and full load speed?
Index or Glossary
What is the effect of induction motor on power factor?
An induction motor has a lagging power factor. Motors of more than about 2 HP are designed to have a power factor of 0.85 or higher.
What are the Factors increase in service businesses?
Labor productivity, quality of the service rendered, and machinery are the factor increase in service businesses. Customer service is another factor.
What is the most important factor to consider when replacing a motor with a different motor?
Frame
Where would power factor capacitors be installed on a 3 phase motor?
Power factor capacitors can be installed on a three phase motor between the motor contactor and the overload heater block.
