Specifications:
The document provides detailed specifications for the BTO3-2pole alternator series. It includes information on power ratings, efficiency, and mechanical protection standards. The alternators are available in both single-phase and three-phase configurations, with power ratings at 277/480 V and 230/400 V for 60 Hz and 50 Hz operations respectively.

Electrical Characteristics:
Key electrical parameters such as direct-axis synchronous reactance, transient reactance, and subtransient reactance are detailed. The document also specifies time constants for transient and subtransient conditions, as well as stator winding resistance.

Mechanical and Thermal Protection:
The alternators are equipped with various protection features including IP21, IP23, and IP45 mechanical protection, and thermal protection devices like PTC and bimetal devices.

Dimensions and Mounting:
Overall dimensions and mounting configurations are provided, including details for different forms such as B14, B9, J609b, and MD35. Specific measurements for flanges and coupling discs are also included.

Spare Parts List:
A comprehensive list of spare parts is provided, including part names, codes, and descriptions. This section emphasizes the importance of specifying the alternator type and code when requesting parts.

Additional Notes:
The document highlights the importance of quality assurance, mentioning that the company is certified by DNV ISO 9001.