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API STD 546-2022 pdf free download

API STD 546-2022 pdf free download.Brushless Synchronous Machines— 500 kVA and Larger.
1.1 Scope 1.1.1 This standard covers the minimum requirements for form-wound and bar-wound brushless synchronous machines 500 kVA and larger for use in petroleum, chemical, and other industrial applications. This standard includes synchronous motors and generators with two different rotor designs: a) salient-pole type rotors with solid or laminated poles; b) cylindrical type rotors with solid or laminated construction. Notes following a paragraph in Section 1 through Section 8 are informational only and are not enforceable as part of this standard. Some paragraphs have intentionally been left blank to align paragraph numbers with API 541. A round bullet (l) at the beginning of a paragraph indicates that either a decision is required or further information is to be provided by the purchaser. This information shall be indicated on the datasheets (see Annex A or Annex B); otherwise, it shall be stated in the quotation request or in the order. A diamond bullet ( ♦ ) at the start of a paragraph indicates additional requirements for motors applied with an adjustable speed drive (ASD). 1.1.2 The purchaser specifies machine details and features by completing the associated sections of the datasheets in Annex A or Annex B. NOTE Guidance for completion of the datasheets is provided in Annex D and Annex E. 1.1.3 The vendor completes the details and features in the vendor section of the datasheets (see Section 8 and Annex A or Annex B). 1.1.4 Within this standard, the term “motor” addresses synchronous motors as well as synchronous motor-generators that are subjected to an asynchronous start. The term “machine” addresses the three types of machines: motors, generators, and motor-generators. 1.1.5 Super synchronous motor applications are addressed in Annex I. 1.2 Alternative Designs The vendor may offer alternative designs in accordance with 8.4. 1.3 Dimensions and Standards 1.4 Conflicting Requirements In case of conflict between the inquiry, order and datasheets, this document, and any referenced standards, the order of precedence shall be as follows: 1) inquiry or purchase order; 2) datasheets; 3) purchaser’s specifications; 4) this API 546 standard; 5) referenced publications. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API Standard 614, Lubrication, Shaft-sealing, and Oil-Control Systems and Auxiliaries API Standard 618, Reciprocating Compressors for Petroleum, Chemical, and Gas Industry Services API Standard 670, Machinery Protection Systems API Standard 671, Special-purpose Couplings for Petroleum, Chemical, and Gas Industry Services API Recommended Practice 684, Standard Paragraphs Rotordynamic Tutorial: Lateral Critical Speeds, Unbalance Response, Stability, Train Torsionals, and Rotor Balancing API Recommended Practice 691, Risk-based Machinery Management ABMA 7 1 , Shaft and Housing Fits for Metric Radial Ball and Roller Bearings (Except Tapered Roller Bearings) Conforming to Basic Boundary Plan ABMA 20, Radial Bearings of Ball, Cylindrical Roller and Spherical Roller Types—Metric Design AGMA 9002 2 , Bores and Keyways for Flexible Couplings (Inch Series) ASA S12.54 3 , Acoustics—Determination of Sound Power Levels and Sound Energy Levels of Noise Sources Using Sound Pressure—Engineering Methods for an Essentially Free Field Over a Reflecting Plane ASME B106.1M 4 , Design of Transmission Shafting
3.1.25 service factor A multiplier applied to the rated power of an AC motor, which indicates an increased power loading that may be carried under the conditioning specified for the service factor (see NEMA MG 1). NOTE For service factors above 1.0, the motor will run at an increased temperature and insulation life will be adversely affected. 3.1.26 soleplate Plate attached to the foundation, with a mounting surface for equipment or for a baseplate. 3.1.27 special tool Tool that is not a commercially available catalog item. 3.1.28 stator shift A mechanical design where the stator assembly is axially relocated on the soleplate or base without bearing removal. This exposes the rotor poles to facilitate maintenance or removal. 3.1.29 torsional critical speeds Correspond to resonant frequencies of the complete mass-elastic system in the drive train including couplings and driven equipment. NOTE The first torsional natural frequency of synchronous motor/driven equipment combinations normally lies between twice the line frequency and zero frequency and could be excited from the motor or driven equipment. This means that at least the first torsional critical speed is traversed each time such a drive train is started. Depending on the mechanical characteristics of the drive train, at the resonant speed defined by the intersection of the natural torsional frequency and the frequency of the torque oscillations, the torque oscillation could be escalated to a point at which unacceptably high torsional stress occurs in the rotating system if there is not sufficient damping within the system.

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