IEEE Electrification Magazine - September 2017 - 42

16 MW

16 MW

16 MW

16 MW

G

G

G

G

11 kV
60 Hz

11 kV
60 Hz

M

M

Thruster
2.5 MW

M

M

Other HV
Loads

Other HV
Loads

LV
Loads
690 V
230 V
440 V

M
Main
Propulsion
16.5 MW

LV
Loads
690 V
230 V
440 V

Thruster
2.5 MW

Main
Propulsion
16.5 MW

Figure 1. The typical all electric cruise ship IPS. LV: low voltage; HV: high voltage; G: generator; M: motor.

Superstructure

Hull
Waterline

MVZ 7

MVZ 6

MVZ 5

MVZ 4

MVZ 3

MVZ 2

MVZ 1

Figure 2. The typical passenger ship's structure subdivision.

A-class boundaries (both bulkheads and decks). If the system is not present, then the represented casualty also
includes the adjacent spaces, as far as A-class boundaries
are reached (Figure 3). Concerning flooding casualties, the
threshold is determined by the loss of any single main
watertight compartment. As a result, three possible scenarios shall be considered:
a) a safe return to port in the presence of flooding in one
watertight compartment (Regulation II-1/8-1)
b) a safe return to port in the event of a fire in a limited
space within an MVZ (Regulation II-2/21)
c) the need for evacuation and to abandon ship when a
fire exceeds the casualty thresholds shown in Figure 3
(Regulation II-2/22).
In addition, in the SRtP perspective, casualties are to be
considered as not occurring at the same time.

42

I E E E E l e c t r i f i c ati o n M agaz ine / SEPTEMBER 2017

Regarding the essential systems, these shall remain
operational after a fire or flooding casualty to allow a
ship's safe return to port or to support an orderly evacuation and abandon ship if needed. In particular, the power
supply to the essential systems must be guaranteed, as
well as cooling and all the other accessory services needed to keep them operational. Examples of systems that
are considered essential are as follows:
xx
propulsion, steering, and control systems
xx
navigational systems
xx
fuel oil systems
xx
internal and external communication
xx
fire main system, fixed fire-extinguishing systems, fire
and smoke detection systems
xx
bilge and ballast systems
xx
power-operated watertight and semiwatertight doors



Table of Contents for the Digital Edition of IEEE Electrification Magazine - September 2017

IEEE Electrification Magazine - September 2017 - Cover1
IEEE Electrification Magazine - September 2017 - Cover2
IEEE Electrification Magazine - September 2017 - 1
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IEEE Electrification Magazine - September 2017 - Cover3
IEEE Electrification Magazine - September 2017 - Cover4
https://www.nxtbook.com/nxtbooks/pes/electrification_december2022
https://www.nxtbook.com/nxtbooks/pes/electrification_september2022
https://www.nxtbook.com/nxtbooks/pes/electrification_june2022
https://www.nxtbook.com/nxtbooks/pes/electrification_march2022
https://www.nxtbook.com/nxtbooks/pes/electrification_december2021
https://www.nxtbook.com/nxtbooks/pes/electrification_september2021
https://www.nxtbook.com/nxtbooks/pes/electrification_june2021
https://www.nxtbook.com/nxtbooks/pes/electrification_march2021
https://www.nxtbook.com/nxtbooks/pes/electrification_december2020
https://www.nxtbook.com/nxtbooks/pes/electrification_september2020
https://www.nxtbook.com/nxtbooks/pes/electrification_june2020
https://www.nxtbook.com/nxtbooks/pes/electrification_march2020
https://www.nxtbook.com/nxtbooks/pes/electrification_december2019
https://www.nxtbook.com/nxtbooks/pes/electrification_september2019
https://www.nxtbook.com/nxtbooks/pes/electrification_june2019
https://www.nxtbook.com/nxtbooks/pes/electrification_march2019
https://www.nxtbook.com/nxtbooks/pes/electrification_december2018
https://www.nxtbook.com/nxtbooks/pes/electrification_september2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2018
https://www.nxtbook.com/nxtbooks/pes/electrification_december2017
https://www.nxtbook.com/nxtbooks/pes/electrification_september2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2018
https://www.nxtbook.com/nxtbooks/pes/electrification_june2017
https://www.nxtbook.com/nxtbooks/pes/electrification_march2017
https://www.nxtbook.com/nxtbooks/pes/electrification_june2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2016
https://www.nxtbook.com/nxtbooks/pes/electrification_september2016
https://www.nxtbook.com/nxtbooks/pes/electrification_december2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2016
https://www.nxtbook.com/nxtbooks/pes/electrification_march2015
https://www.nxtbook.com/nxtbooks/pes/electrification_june2015
https://www.nxtbook.com/nxtbooks/pes/electrification_september2015
https://www.nxtbook.com/nxtbooks/pes/electrification_march2014
https://www.nxtbook.com/nxtbooks/pes/electrification_june2014
https://www.nxtbook.com/nxtbooks/pes/electrification_september2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2014
https://www.nxtbook.com/nxtbooks/pes/electrification_december2013
https://www.nxtbook.com/nxtbooks/pes/electrification_september2013
https://www.nxtbookmedia.com