Section 9 Rotating machines
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 6 Control and Electrical Engineering - Chapter 2 Electrical Engineering - Section 9 Rotating machines

Section 9 Rotating machines

Parent topic: Chapter 2 Electrical Engineering

9.1 Construction, performance, control and testing

9.1.1 The requirements for construction, performance, control and testing of rotating machines are given in IEC 61892-3:2012, Mobile and fixed offshore units – Electrical installations – Part 3: Equipment, Section 5 and Pt 6, Ch 2, 9 Rotating machines of the Rules for Ships, which are to be complied with.

9.1.2 Additions or amendments to these requirements are given in Pt 6, Ch 2, 9.2 Temperature rise.

9.2 Temperature rise

9.2.1 The limits of temperature rise specified in Pt 6, Ch 2, 9.4 Generator control 9.4.3 in Pt 6, Ch 2, 9.3 Temperature rise of the Rules for Ships are based on the cooling air temperature and cooling water temperature given in Pt 6, Ch 2, 1.9 Ambient reference and operating conditions 1.9.2.(a).

9.2.2 If it is known that the temperature of cooling medium exceeds the values given in Pt 6, Ch 2, 1.9 Ambient reference and operating conditions 1.9.2.(a) the permissible temperature rise is to be reduced by an amount equal to the excess temperature of the cooling medium.

9.2.3 If it is known that the temperature of cooling medium will be permanently less than the values given in Pt 6, Ch 2, 1.9 Ambient reference and operating conditions 1.9.2.(a) the permissible temperature rise may be increased by an amount equal to the difference between the declared temperature and that given in Pt 6, Ch 2, 1.9 Ambient reference and operating conditions 1.9.2.(a), up to a maximum of 15°C.

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