system outside the building, and the arrangement of the
Large generator units may have, connected or
attached to them, engine equipment that requires extra
space and working area. Included in this equipment are
air-intake filters, silencers for air intake and exhaust,
fuel and lubricating oil pumps, tanks, filters, and
strainers. Also included are starting gear, isochronous
regulating governors with over-speed trips, safety alarm
and shutdown devices, gauges and thermometers,
turning gear, along with platforms, stairs, and railings.
An even larger and more complete power plant may
require separate equipment, such as a motor-driven
starting air compressor and air storage tanks; motor-
driven pumps for jacket water and lubricating oil
cooling, or heat exchangers with raw cooling water
pumps and lubricating oil coolers; and tanks that
include day-fuel storage.
Be sure to provide enough working space around
each unit for repairs or disassembly and for easy access
to the generator control panels.
Installation specifications are available in the
manufacturers instruction manual that accompanies
each unit. Be sure to use them. Consulting with the
Builder about these specifications may help cut
installation costs and solve future problems affecting
the shelter of the generator.
SERVICING THE GENERATOR
Before the set is operated, it must be serviced. We
will use the 60-kW generator set as an example for
discussing the servicing of the set after you receive it.
As you read this discussion, refer to figure 3-1 for
locating fill and drain points and drain valves.
All 5-kW through 750-kW generator sets are
furnished with dry-charged batteries less the
electrolyte. Battery electrolyte must be requisitioned
You must be cautious when installing, activating, or
Before we discuss connecting
Do not smoke or use an open flame in the
vicinity of batteries when servicing them.
Batteries generate hydrogen a highly
explosive gas. When removing batteries,
always remove both negative cables before
removing the positive cables (fig. 3-2).
Battery electrolyte contains sulfuric acid and can
cause severe burns. It is highly toxic to the skin, eyes,
and respiratory tract. Skin, eyes, and face (chemical
splash goggles, face shields) and respiratory protection
are required. Whenever electrolyte comes into contact
with the body, the eyes, or the clothing, you must rinse
immediately with clean water, remove contaminated
clothing, and then go to sickbay or the medical clinic for
a thorough examination.
The 60-kW generator set is equipped with two 12-
volt, 100-ampere-hour batteries. The batteries are
located under the radiator (fig. 3-1, view A) on aroll-out
tray (fig. 3-3). They are connected in series to supply 24
volts dc for starting the generator set and operating
direct current components. Two slave receptacles (fig.
3-2), connected in parallel, permit easy connection to
the batteries to supply or obtain battery power. As we
and servicing batteries, lets look at a few safety points
you must know about.
Figure 3-2.Battery cable connections and slave receptacles.