CHAPTER 1 INTRODUCTION
Purpose. This Technical Manual (TM) describes the operation and maintenance of electrical power systems on the
Water Purification Barges. Information about other systems installed onboard is in TMs 55-1930-209-14&P-1 thru P-8 and
P-10 thru P-1 7. TM 55-1930-209-14&P-18 and TM 55-1930-209-14&P-20 contain appendices common to all TMs.
Equipment location on the barge is shown in Figure 1-1.
Scope. Two electrical systems, normal and emergency, are installed onboard. The normal electrical system
generates, controls, and distributes all electrical power onboard for operating the water purification system and its auxiliary
systems. The emergency electrical system supplies 24 Vdc from a battery bank to 24 Vdc equipment and converts 24 Vdc
through an inverter to 120 Vac to power emergency lighting and equipment.
Normal electrical system
1-2.1.1 Electrical power is generated by three diesel-powered generator sets, located in voids 4 port and starboard, or is
acquired from an onshore power source or another vessel through an external power receptacle. In addition, power can be
transmitted off the barge through another external power receptacle.
1-2.1.2 Power from these various sources is controlled and initially distributed by a master switchboard in the Reverse
Osmosis Water Purification Unit (ROWPU) space.
1-2.1.3 Distribution from the switchboard goes directly to either the equipment, such as seawater pumps, or to three
intermediate distribution power panels.
Emergency electrical system. This system obtains 24 Vdc power from a battery bank on the deckhouse top. It
distributes it through a 24 Vdc power panel for operation of navigation lights and other equipment. It also supplies power to
an inverter that converts 24 Vdc to 115 Vac for the emergency lighting system.
Warranties and guarantees. Warranty/guarantee information is contained in Section VII of Chapters 2, 3, 4, and
Maintenance forms and records. Required maintenance forms and records are explained in DA PAM 738-750,
The Army Maintenance Management System (TAMMS).
Destruction of Army materiel to prevent enemy use. This shall be as directed in TM 750-244-3.
Storage. For storage of this equipment, refer to Section V of Chapters 2, 3, 4, and 5.