MIL-DTL-16036M(SH)
3.3.1.3 Mercury. Mercury shall not be used in any process of manufacture or test of switchgear and its
components.
3.3.1.4 Polyvinyl chloride (PVC). PVC material shall not be used. Unless otherwise specified (see 6.2), PVC
use will be allowed only if it is a part of or integral to the leads of a component or as a constituent or integrated
element of a component.
3.3.1.5 Chemical conversion coatings. Chemical conversion coatings may be used as a protective coating for
aluminum frame and aluminum components internal to the switchboard. Coatings may also be used as a preparation
for the paint process. Electrically conductive Class 3 coating may be used in grounding. When used, coatings shall
meet requirements of MIL-DTL-5541, visually discernible color.
3.3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.3.3 Component derating. Components shall be derated in accordance with applicable paragraphs of this
specification. SD-18 may be used as a derating guideline.
3.4 Construction. Unless otherwise specified (see 6.2), the equipment shall conform to the general
requirements of MIL-E-917 and be designed for operation, maintenance, and repair by the 5th through the 95th
percentile user as described in MIL-STD-46855. Whether or not specifically mentioned for the various units,
switchgear groups shall be complete with all devices required to accomplish the functions specified herein.
3.4.1 Ship s service power switchgear group (see 6.3.12) for ships having AC power.
3.4.1.1 AC generator control unit for switchgear groups having an electric plant control panel (EPCP) or having
both an EPCP and an electric plant control console (EPCC). (see figure 1 for a typical one-line diagram) The
following shall be mounted on or within the unit:
a.
One generator circuit breaker.
b. One control power transformer (450/120 volts), connected to generator side of circuit breaker, for generator
circuit breaker and governor motor control circuits, if required.
c. Potential transformers for metering and relaying, electric governor, and synchronizing, in number as
required.
d. Current transformers for metering and relaying and for electric governor, in number as required. Protective
device when metering is remote.
e.
One current transformer with protective device for remote metering, where remote metering is required.
f. Dead-front fuse panel for fusing of the potential and control transformer primary circuits and any control
circuits extending outside of the section. Dead-front fuseholders shall be of the type listed in 3.14.2.1 in accordance
with MIL-PRF-19207.
g. Space, mounting, and wiring for the voltage regulator equipment, including associated current and potential
transformers as specified (see 6.2). Equipment shall be furnished with the generators.
h. One circuit breaker (see 3.12), Type AQB-A or AQB-LF, 250-ampere frame size. The casualty power
circuit breaker shall be connected to the generator side of the generator circuit breaker. When the generator capacity
is 500 kilowatts or greater, two casualty power circuit breakers shall be furnished.
i. One casualty power terminal, back-connected type, conforming to MIL-DTL-24552, connected through the
AQB-A or AQB-LF circuit breaker, item (h). When the generator capacity is 500 kilowatts or greater, two casualty
power terminals, back-connected type, shall be furnished.
j. One reverse power relay, conforming to MIL-M-24350, to prevent the generator from motoring on the bus
after loss of driving power from the prime mover.
k.
One indicator light (blue) to indicate that the generator circuit breaker is closed.
l.
One generator running and voltage available auxiliary relay for control of associated indicator lights.
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