| The AC electrical system is a 3-phase 120/208 volt distribution system with a maximum capacity of 60 kW. Power is supplied from two Onan generators and through one 100 amp shore power connection. The vessel is fitted with a 35kVA shore power converter allowing connection to any shore connection worldwide. Provisions have been made for the seamless transfer of power from generator to generator, or generator to shore side power connection |
| Atlas 35kVA shore power converter with seamless transfer |
| 120 volt AC inverter system for emergency power, control power to the helm station and for refrigeration during times when the generators are offline |
| AC Outlets are standard US format 120 volt AC. Location shown on drawing |
| All outlets in head compartments, mechanical spaces, exterior and galley are GFCI type. All external outlets have water proof covers |
| One (1) Glendinning shore power cord retrieval system provided for the 120/208 volt AC, 100 amp. ships shore power connection. The system to be provided with 100' (30.48 m) of shore power cable. Shore power inlet to be located at the stern of the vessel |
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| The DC electrical system is a 24 volt distribution system with a maximum capacity of 765 amp/hours. The DC system is to provide limited power the ships inverter system and provide power to the helm station DC equipment |
| Standard batteries are located per PAE machinery drawing and are provided as follows: |
| 24 volt DC house battery bank - Consists of six (6) 8D, 12 volt "Lifeline" AGM batteries @ 255 Ah each. connected in series/parallel. A total battery bank capacity of 765 amp/hours is provided for emergency, control, ships equipment and limited operation without operation of a generator or shore power connection |
| 12 volt DC helm power is drawn from one (1) 4D battery |
| Port main engine starting - two (2) 4D "Lifeline" AGM connected in series for 24 volt starting. Switching logic to parallel with 24 volt house bank for emergency starting |
| Starboard main engine starting - two (2) 4D "Lifeline" AGM connected in series for 24 volt starting. Switching logic to parallel with 24 volt house bank for emergency starting |
| #1 Generator starting- two (2) Group 31 “Lifeline” AGM connected in series for 24 volt starting. Switching logic to parallel with 24 volt house bank for emergency starting |
| #2 Generator starting- two (2) Group 31 “Lifeline” AGM connected in series for 24 volt starting. Switching logic to parallel with 24 volt house bank for emergency starting |
| 24 volt battery charging is provided in the following ways: |
| Inverter/charger provides a total of 70 amps at 24 volts for the house battery bank |
| Main engine starting battery bank is charged from the respective engine alternator |
| Generator starting battery bank is charged from the respective engine alternator |
| Each charging source can be switched to accommodate any single failure of a charging device |
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| All wire to be marine grade, tinned conductor, 600 volt insulation type and sized according to the ABYC Standards |
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| When possible wiring to be color coded per ABYC standards |
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| Connectors to be ring type with closed end seamless construction |
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| SSB radio round plane and lightning ground systems per PAE drawing |
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| Electrolysis control per PAE drawing |
| All thru hulls to be bonded together with a #6 green wire and tied into the DC grounding system |
| All hardware mounted below water line - i.e. stuffing box, rudder shoe, rudder frame, all thru hulls, engines, and strainers to be connected to bonding system |
| Zinc plates to be tied into the bonding system based on the hull potential requirements of the vessel |
| One (1) "Perry nut" zinc on the end of each main engine propeller shaft |
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| Electrical Panels |
| Main AC distribution and control panel located in E/R, sub panels located fore and aft on each deck as required |
| Main DC distribution and control panel located in E/R, sub panels located fore and aft on each deck as required |
| AC/DC distribution panel in wheel house for helm instrumentation and equipment |
| House battery control panel in Lazarette, control of the panel at the helm station |
| Engine/gen start battery and emergency parallel control panel at entrance to engine room, control of the panel at the helm station |
| Generator start/stop panel in wheel house |
| Helm station control and monitoring panel for bilge pumps, engine room ventilation, navigation lights, high water alarms, pump monitoring and other shipboard systems |
