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 LANTNAVFACENGCOM A&E GUIDE
3/93
c. Fuse link type and ampere rating
A.3.6
SWITCHGEAR
a. Circuit Breakers: Provide batteries for dc tripping. Do not use direct
trip, ac trip, or capacitor trip.
b. Show bus size and instrumentation on one-line diagram.
c. Provide elevation drawings showing compartments, their intended use,
and instruments and controls.
A.4
METERING, PT'S AND CT'S, INSTRUMENTATION, RELAYING
A.4.1
WATTHOUR METER
a. Provide watthour meters with 15-minute interval sweep-hand type kW
demand register for all buildings, except housing units.
b. Supply housing units with meter sockets only. Sockets shall be single
phase, four terminal, ringless with manual bypass device and
polycarbonate blank cover plate.
c. Place meters and meter sockets in accessible locations.
A.4.2
PT'S AND CT'S
a. Show potential and current transformer ratios on one-line diagrams.
b. Carefully coordinate connection and ratio of potential transformers
with relay and meter requirements.
c. Provide separate current transformers for relaying and metering.
Metering current transformers shall be single ratio.
A.4.3
INSTRUMENTATION
Specify complete characteristics of instrumentation.
A.4.4
RELAYING
Provide the following minimum information on the one-line diagram/
drawings:
Attachment A-21
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