MIL-DTL-16036M(SH)
m. Test receptacles with test plugs for connecting portable instruments to the metering current and potential
circuits. Removal of the receptacle protective cover shall automatically short circuit the secondary winding of
metering current transformers so that only the meters are electrically removed from the circuit.
n. One temperature indicator with select switch and accessories, when temperature detectors are provided with
the generator as specified (see 6.2).
o.
One indicator light (blue) to indicate that the generator circuit breaker is closed.
p. One AC ammeter for each casualty power terminal furnished for reading one phase of casualty power
current.
3.4.1.1.2 AC bus tie unit for switchgear groups on ships provided with a centralized machinery control system
including an EPCC, but not an EPCP. The following shall be mounted within the unit:
a.
One electrically-operated bus tie circuit breaker.
b.
One feeder circuit breaker.
c.
Necessary disconnecting devices for performing isolating functions as may be required (see 6.2).
d. Potential transformers, for metering and relaying, and for synchronizing, in number as required for the bus
connections of the switchgear group.
e.
One current transformer for metering the current interchange through the bus tie circuit breaker.
f. Dead-front fuse panel for fusing the potential and control power transformer primary circuits. Dead-front
fuseholders shall be of the type listed in 3.14.2.1 in accordance with MIL-PRF-19207.
g. Transfer relays to automatically transfer the source of circuit breaker closing power between the
switchboard bus and bus tie.
h.
Relays for remote control of the bus tie circuit breaker. Relays shall be energized from EPCC power.
Bus tie units of the switchgear group containing the shore power connection shall be designated as a "bus tie and
shore power unit". In addition, this unit shall substitute item (i) for the feeder circuit breaker, and items (j), (k), and
(1) as follows shall be added:
i. Circuit breakers, Type AQB-LF, motor operated, 400-ampere frame size, to be furnished on only one bus
tie unit of any switchgear group. One shall be provided for each shore power receptacle. Shore power circuit shall
be connected to the bus tie circuit so that power may be fed to either the local or remote switchboard through a bus
tie circuit breaker. Where more than four circuit breakers are required, a separate switchgear unit may be provided.
j.
Current transformers for metering the total shore power current.
k.
Potential transformers for metering and synchronizing, in number as required.
l. Relays for remote control of the shore power circuit breaker motor operators. Motor operators shall be
controlled from the local switchboard.
3.4.1.1.2.1 Front panel. The following shall be mounted on the front panel of the bus tie unit:
a.
One control switch for control of the bus tie circuit breaker.
b. Indicator lights (blue) to show the closed position of the bus tie circuit breaker and the Type ACB (see
3.12) feeder circuit breaker.
c. One set of three ground indicator lights (clear) with a control switch to indicate ground conditions on the
main bus or any of its connected feeders.
d.
One AC ammeter for indicating the bus tie current.
e.
One zero neutral wattmeter for reading bus tie power and direction of power flow.
3.4.1.1.2.2 Bus tie and shore power unit. When this unit is designated a bus tie and shore power unit, the
following additional devices shall be mounted on the front panel of the unit:
a. One shore power circuit breaker control switch for operating all shore power circuit breakers
simultaneously.
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