Q3 Flashcards
How many diesel generators fitted to a type 23
4
Output of generators on type 23
1.3MW
600V
61.2Hz
3 phase
Why do we use 600v on type 23
450v would have a large enough range of speeds
Breakers fitted to type 23s
- supply breaker
- interconnector breaker
- shore supply/ship alongside breaker
- electric motor breaker
- motor generator feeder breaker
- motor generator supply breaker
- diesels generator alternative supply breaker
What does a converter regulator do
Converts and regulated the voltage at 750v
Voltage required for type 23 services and how is it produced
450v
Generated by a motor generator
What are EDPs and how many types are fitted
Electrical distribution panels
3 are fitted
What are shedable services and why do we have them
They provide power to non essential equipment
What happens if we lose both motor generators and how does it happen
The 600v generator can be re configured to supply the 450v system using a switch
What services does the emergency switchboard supply
Steering motors
High pressure salt water pumps
Sickbay
Smoke clearance exhaust fans
Portable pump sockets
What are EMACB
Electric motor air circuit breaker supplies 600v to the converter regulator
Why is electric propulsion preffered in submarine warfare
To reduce noise
What SRPM and Knots do 2 diesel generators produce
65 SRPM
8-9 knots
What SRPM and knots do 3 diesel generators produce
80 SRPM
10-12 knots
What SRMPM and knots for 4 diesel generators produce
90 SRPM
14 knots
In the event of action damage how can motors be controlled
From LCPs
Describe the cooling system for the propulsion motors
Cooled by water cooled air
Describe the emergency cooling for the converter
2 emergency inlet panels are removed so the fan draws air in
What does IEP stand for on the type 45
Integrated electric propulsion system
What are the LV and HV filters used for on the type 45 distribution system
Harmonic filters are used to smooth out and filter the voltage supply
What is used to cool harmonic filters
Air to water heat exchanger
What’s the voltage supplied by the main GTAs
4160v
60Hz
3 phase
21MW
What does PMS and EPMS stand for
Platform management system
Electrical power management system
When are the navigation lights tested and by eho
Tested daily an hour before sunset
Tested by the duty ETME
Whose permission is needed to switch the lights on
OOW/OOD
