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REPAIR P ELECTRICIAN
| Question | Answer |
|---|---|
| What does AEL stand for? | Allowed Equipment List |
| What is the procedure/ reference by which the electrical repair kit is inventerd? | AEL |
| What is the procedure/ reference by which electrical safety equipment is dond and de-metalization is conducted? | NSTM300 |
| What is the reference by which electrical distribution systems and components are located and an assigned space is electrically isolated? | RPM |
| By what reference(s) is an electrical damage survey conducted and ETR (expected time of repair) is provided? | RPM & NSTM300 |
| By what reference is checking and assessing installed ventilation systems conducted prior to their use in desmoking operation? | RPM |
| What reference(s) do you use to don SCBA/toxic gas and electrically investigate/repair circuits inside smoke/ fire boundaries? | NSTM 077 & NSTM 300 |
| By what reference(s) do you Rig/Unrig casualty power system? | RPM & NSTM 300 |
| By what reference do you conduct emergency repairs to vital circuits? | NSTM 300 |
| How do you respond to dark ship? | Verify breakers are fully opened. Check cables and connections from shore power source. Standby for the start of standby GTG and parallel IAW GTPG. |
| How to respond to a class ”C” fire in a switchboard. | CCS Operator isolates switchboard. Attempt to distinguish fire IAW MCFED. Apply CO2 through vents. Remove BUS Disconnects from the back of the switchboard. |
| How to respond to loss of 400Hz Converter/MG sets. | 400Hz converters and switchboards are located in CSER 2, Berthing 4 & CSMC. Check the breakers on those switch boards. |
| How to respond to a ground in the electrical distribution system. | Bus splitting from the EPCC to identify faulty zone. Isolate Load Centers starting with none vital loads via switchbords in the faulty zones. Once faulty Load center has been identified check associated equipment breakers. |
| How to monitor shore power cables. | Shore power cable - 400A THOF:Three phase: Heat & Oil resistant: Flexible. Connected to pigtails that connect to terminals on shore power source and ships receptacles. Light indications on 2SP SWBD breakers to show that the cables are energized. |
| How to monitor shore power cables. (ctd) | Open/Closed blue and yellow light indicators on switchboard. Use Phase sequence selector switches and meter to ensure correct phase connections. |
| What does RPM stand for? | Repair Party’s Manual |
| What does NSTM stand for? | Naval Ships’ Technical Manual |
| What does the term Insulation Resistance mean? | The resistance to current leakage through and over the surface of insulation. Represented by Meg-ohm. |
| What does the term Dielectric strength means? | The ability to withstand potential difference and is usually expressed in terms of voltage at which the insulation fails due to electrostatic stress. Maximum dielectric strength values can be measured only by testing to destruction. |
| How do you locate a ground in a circuit? | It is usually necessary to begin at the main distribution panel containing the ground indicator that shows the ground. By selectively opening and closing the protective devices in this distribution panel. |
| How do you locate a ground in a circuit? (cont’d) | Troublesome circuit can then be further isolated by selectively opening and closing individual protective devices in the subpanel while someone observes the ground indicator at the main panel. |
| What is the primary purpose of making insulation resistance measurements of shipboard cable installations? | To determine the condition of the cable so that deterioration and incipient failure may be discovered and remedied. |
| What considerations should you make before taking insulation resistance measurements? | Other Apparatus or equipment is connected in the circuit when the measurement is made. |
| When taking insulation resistance readings of a Motor Windings where should the test voltage be applied? | Between the copper conductors and a metallic part of the rotor rather than the stator in order to eliminate the insulating effect of oil in the bearings. |
| Describe the Gas Turbine Generator on board Stockdale. | The Rolls Royce 501-K34 GTG is a single shaft engine with a fourteen stage axial flow compressor, can-annular combustor, and four stage turbine. The engine rotates at 14,340 RPM to output 1800 rpm in the generator (60 Hz). |
| Describe the Gas Turbine Generator on board Stockdale. (Cont’d) | Each GTG is capable of supplying 3000 KW of electrical power at 450 VAC, 4800 amps, 60 Hz, 3 phase, with a 0.8 power factor. |
| Describe the Gas Turbine Generator on board Stockdale. (Cont’d)2 | The GTG has 12 thermocouples that measure Turbine Outlet Temperature (TOT), which is converted to Calculated Turbine Inlet Temperature (CTIT) by a microprocessor in the Full Authority Digital Control (FADC)/Local Control Operating Panel (LOCOP). |
| Describe the Gas Turbine Generator on board Stockdale. (Cont’d)3 | CTIT is used in all alarm and shutdown set points. The compressor is a 14 stage axial flow fixed geometry compressor. It compresses combustion air before the air enters the combustor. |
| Describe the Gas Turbine Generator on board Stockdale. (Cont’d)4 | The combustor is a can-annular design consisting of 6 annular combustion chambers called cans. Each can contains a fuel nozzle. Cans NR 2 and NR 5 each contain an igniter. Flame spreads to the other four cans via crossover tubes. |
Created by:
FlashClaude