Q3 Flashcards

1
Q

How many diesel generators fitted to a type 23

A

4

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2
Q

Output of generators on type 23

A

1.3MW
600V
61.2Hz
3 phase

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3
Q

Why do we use 600v on type 23

A

450v would have a large enough range of speeds

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4
Q

Breakers fitted to type 23s

A
  • 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
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5
Q

What does a converter regulator do

A

Converts and regulated the voltage at 750v

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6
Q

Voltage required for type 23 services and how is it produced

A

450v
Generated by a motor generator

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7
Q

What are EDPs and how many types are fitted

A

Electrical distribution panels
3 are fitted

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8
Q

What are shedable services and why do we have them

A

They provide power to non essential equipment

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9
Q

What happens if we lose both motor generators and how does it happen

A

The 600v generator can be re configured to supply the 450v system using a switch

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10
Q

What services does the emergency switchboard supply

A

Steering motors
High pressure salt water pumps
Sickbay
Smoke clearance exhaust fans
Portable pump sockets

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11
Q

What are EMACB

A

Electric motor air circuit breaker supplies 600v to the converter regulator

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12
Q

Why is electric propulsion preffered in submarine warfare

A

To reduce noise

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13
Q

What SRPM and Knots do 2 diesel generators produce

A

65 SRPM
8-9 knots

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14
Q

What SRPM and knots do 3 diesel generators produce

A

80 SRPM
10-12 knots

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15
Q

What SRMPM and knots for 4 diesel generators produce

A

90 SRPM
14 knots

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16
Q

In the event of action damage how can motors be controlled

A

From LCPs

17
Q

Describe the cooling system for the propulsion motors

A

Cooled by water cooled air

18
Q

Describe the emergency cooling for the converter

A

2 emergency inlet panels are removed so the fan draws air in

19
Q

What does IEP stand for on the type 45

A

Integrated electric propulsion system

20
Q

What are the LV and HV filters used for on the type 45 distribution system

A

Harmonic filters are used to smooth out and filter the voltage supply

21
Q

What is used to cool harmonic filters

A

Air to water heat exchanger

22
Q

What’s the voltage supplied by the main GTAs

A

4160v
60Hz
3 phase
21MW

23
Q

What does PMS and EPMS stand for

A

Platform management system
Electrical power management system

24
Q

When are the navigation lights tested and by eho

A

Tested daily an hour before sunset
Tested by the duty ETME

25
Q

Whose permission is needed to switch the lights on

A

OOW/OOD