What are the requirement of installation of rotating electrical machine?
A solid foundation of concrete is provided for the installing of rotating machine. To avoid misalignment of plate proper mounting of the machines, the motor or prime mover and the driven machines are mounted on the common foundation. Usually the manufacturer put both the machines on common steel base.
What are the classifications of a rotating electrical machines?
The classification of a rotating machine is the following: DC machines: direct-current machines; Synchronous machines: here the DC current goes through one winding, and AC current through the other winding; Induction machine: here AC current goes through both.
Is 4722 a standard?
This standard specifies the methods of measurements and the limits of temperature-rise for rotating electrical machines of all types covered by IS 4722 : 1968. The standards given in Annex A are necessary adjuncts to this standard.
What are the main dimensions of rotating machine?
In rotating machine the active part is cylindrical in shape. The volume of the cylinder is given by the product of area of cross section and length. If D is the diameter and L is the length of cylinder, then the volume is given by πD2L/4. Therefore D and L are specified as main dimensions.
What are AC rotating machines?
Rotating electrical machines are also of two types: DC and AC machines. Electrical machines are widely used. In DC machines the stator is used as a field and the rotor is used as an armature, while reverse is the case for AC machines, that is, synchronous generators and synchronous motors.
What is IEC size?
IEC Quick Reference Chart
| Frame Size | A | E |
|---|---|---|
| 71 | 112 mm | 30 mm |
| 80 | 125 mm | 40 mm |
| 90S 90L | 140 mm | 50 mm |
| 100S 100L | 160 mm | 60 mm |
What are the two types of electrical machines?
Electrical Machines can also be categorized as static machine and dynamic machine. The transformer is an example of static electrical machine. Motor and generator both are dynamic electrical machine.
How many types of rotating machines are there?
What is en60034?
IEC 60034-1:2010 is applicable to all rotating electrical machines except those covered by other IEC standards, for example, IEC 60349. Machines within the scope of this standard may also be subject to superseding, modifying or additional requirements in other publications, for example, IEC 60079 and IEC 60092.
Is induction motor a standard?
The dimensions of the motors shall be as specified in IS 1231, IS 2223 and IS 2254 as applicable. The method of measurement and the requirement Page 9 IS 12615 : 2011 4 shall be as given in 8.6 of IS/IEC 60034-1 and 5.7 of IS 15999 (Part 2/Sec 1).
What is the formula of the core length?
What is the formula of the core length? Explanation: Core length is one of the factors used in the separation of D and L of the DC machines. It is the ratio of the pole length to the pole pitch. 2.
What is the formula for rotor turns per phase?
8. What is the formula for rotor turns per phase? Explanation: Firstly, the winding factor for stator is obtained along with the winding factor for stator. Next the ratio of the rotor voltage per phase to the stator voltage per phase.
How do rotating machines produce voltage?
In rotating machines, voltages are generated in windings or groups of coils by rotating these windings mechanically through a magnetic field, by mechanically rotating a magnetic field past the winding, or by designing the magnetic circuit so that the reluctance varies with rotation of the rotor.
How can I become a member of IEC?
Participation. Individuals or companies can’t become a member of the IEC. They can only participate in the IEC via their National Committee. If you are interested to contribute to IEC work in standardization or conformity assessment in an IEC Member country, contact your NC.
What are rotating machines?
Rotating machinery or turbomachinery is a machine with a rotating component that transfers energy to a fluid or vice versa. Consequently, in a turbomachine there is energy transfer between the fluid and the rotor through dynamic interaction.
What are the basics of electrical machines?
The electric machines are of three main types, transformer, generator, and motor. Electrical Transformer: In the transformer, both input and output are electrical power. Electrical Generator: In a generator, the input is mechanical power and the output is electrical power.