3.2.1 The power system should have an adequate
response time to power demand changes.
3.2.2 For equipment class 1 the power system need
not be redundant.
3.2.3 For equipment class 2, the power system
should be divisible into two or more systems such that in the event
of failure of one system at least one other system will remain in
operation. The power system may be run as one system during operation,
but should be arranged by bus-tie breakers to separate automatically
upon failures which could be transferred from one system to another,
including overloading and short-circuits.
3.2.4 For equipment class 3, the power system
should be divisible into two or more systems such that in the event
of failure of one system, at least one other system will remain in
operation. The divided power system should be located in different
spaces separated by the A.60 class division. Where the power systems
are located below the operational waterline, the separation should
also be watertight. Bus-tie breakers should be open during equipment
class 3 operations unless equivalent integrity of power operation
can be accepted according to 3.1.3.
3.2.5 For equipment classes 2 and 3, the power
available for position keeping should be sufficient to maintain the
vessel in position after worst case failure according to 2.2.
3.2.6 If a power management system is installed,
adequate redundancy or reliability to the satisfaction of the Administration
should be demonstrated.