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312 - Generation distribution of electrical power systems (Outcome 1 -…
312 - Generation distribution of electrical power systems
Outcome 1 - Understand power distribution systems
2 Understand insulated and earthed neutral systems
2.1 explain the operation of an insulated LV shipboard system
2.2 explain the operation of an earthed HV system
2.3 explain the effects of faults on distribution systems
faults: HV, LV, earth fault, short-circuit fault, open-circuit fault.
distribution systems: insulated system, earthed system.
2.4 describe the application of components used to monitor distribution systems.
components: current transformers, Earth fault relays, voltage transformers
3 Understand shore supply connections
3.1 describe the purpose of shore supply connections
3.2 describe the type of connection used for shore power
connection
connection box
location
earthing provision
data plate
phase-sequence
indicator
supply protection interlocks
3.3 explain how to address compatibility of differences between shore and ship supplies.
differences:
frequency
voltage
continuity of the weld
!EXAM!
1.1
High Voltage (HV)
Low Voltage (LV)
AC systems
switchboards
power sources
distribution boards
generators
1.2
services
essential, non-essential
1.3 explain the function of distribution switchgear
1.4
system
protection
fuse discrimination
relays, interlocks
local shedding
undervoltage protection v overvoltage protection
1.5
emergency supplies
lighting
alarms
communication
watertight doors
power sources (generator, battery)
testing