Chapter 9 



ELEaRICAL AND ELECTRONIC SYSTEMS 

 FOR THE SEALAB II HABITAT 



R. B. Porter 



U.S. Navy Mine Defense Laboratory 



Panama City, Florida 



INTRODUCTION 



The specifications for the electrical and electronic systems were divided into three sets 

 of specifications: Electrical, Communications, and Data Recording. A fourth specification 

 closely related to the electrical system was prepared for the electrical equipment to be used 

 in the Sealab II habitat. In general the material and equipment specified were standard Navy 

 items normally used in shipboard electrical systems. The use of commercial items was per- 

 mitted and in some cases specified. The short lead time available precluded the design, de- 

 velopment, and testing of any special items or equipment. The requirements specified for the 

 three systems and the electrical equipment are outlined in the following paragraphs. 



REQUIREMENTS FOR ELECTRICAL SYSTEM 



General 



The power and lighting distribution systems are as specified herein and shall be in general 

 accordance with Figs. 30 and 31. The system shall be ungrounded and insofar as practical 

 shall be in accordance with applicable sections of General Specifications for Ships of the U.S. 

 Navy. 



Supply Voltage 



The supply voltage will be 450-volt, 60-cycle, three-phase supplied from the staging vessel 

 or from shore through an underwater transformer bank and junction box installed at the test 

 site by Scripps Institution of Oceanography. A maximum of 75 kva will be available. 



Utilization Voltage 



All power-consuming equipment shall operate on one of the following: 



208-volt, three-phase or single-phase, 60 cycle 

 440-volt, three-phase, 60 cycle 

 115-volt, three-phase, 60 cycle 

 115-volt, single-phase, 60 cycle 



230/115-volt, single-phase, 60 cycle (alternate for range in case suitable 440-volt 

 range is not available) 



Electrical Load 



The estimated electrical load requirements as shown in Table 1 shall be used as a guide 

 in designing the electrical system. 



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