MIL-DTL-16036M(SH)
c. Remote control switches or rheostats, and indicator lights (white), as required, to control the speed of the
prime movers of the remote generators. The control switch power shall be connected through the transfer switches
[see 3.4.1.2.1(h)] on the generator units of the remote switchgear groups, and the indicating lamps shall be
connected to indicate when the transfer of control is accomplished. This shall be provided when the unit has control
of a remote generator.
d. One composite transfer switch for reading the power and current of each remote generator by means of (a)
and (b) above and the shore power current by means of (b) above.
e.
One control switch for control of the bus tie circuit breaker where an electrically-operated circuit breaker is
used.
f. Indicator lights (blue) to show the closed position of the bus tie circuit breaker and the Type ACB feeder
circuit breaker.
g.
One frequency meter for reading the frequency of the bus tie circuit.
h. One transfer switch, with two white indicator lights, for connecting the switchboard control bus to the local
450-volt ship s service bus, or the 450-volt bus of the corresponding (forward or aft) emergency switchboard.
Transfer may be accomplished automatically; however, in such cases one source of power shall be the local 450-volt
ship s service bus and the second source shall be a 450-volt bus tie supply.
i. One set of three indicator lights (clear) with a control switch to indicate ground conditions on the main bus
or any of its connected feeders.
j.
One zero neutral wattmeter for reading bus tie power and direction of power flow.
3.4.1.4.2 Bus tie and shore power unit. One bus tie unit of the switchgear group containing the shore power
connection shall be designated as a "bus tie and shore power unit". In addition to the devices specified in 3.4.1.4
and 3.4.1.4.1, this unit shall substitute item (a) for the feeder circuit breaker, and the additional items (b) through (h)
shall be provided.
a. Circuit breakers, Type AQB-LF, electrically-operated, 400-ampere frame size shall be furnished on only
one unit of the switchgear group. One shall be provided for each shore power receptacle. The 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.
b. One shore power circuit breaker control switch for operating all shore power circuit breakers
simultaneously.
c. One indicator light (white) per shore power receptacle to indicate the shore power feeder is energized. One
indicator light (white) to indicate the bus feeder is energized. These indicator lights shall be mounted near the shore
power circuit breakers.
d.
Indicator lights (blue) to indicate that each shore power circuit breaker is closed.
e.
Current transformers for metering the total shore power current.
f. One switchboard type phase sequence indicator with a multiposition selector switch for use in checking
phase rotation and orientation of shore power connections.
g.
Potential transformers for metering and synchronizing, in number as required.
h. One transfer switch for use with item (g) of 3.4.1.4.1 for reading the frequency of the bus tie circuit and
shore power (see figure 2).
i.
One reference selector switch for use in checking phase orientation of shore power connections.
j.
Two indicator lights (green) for use with (f) and (i) above.
k. For shore power switchboard units with more than four (4) shore power breakers installed, one multi -
position selector switch to allow one of a selected number of different shore power receptacles to act as the master
circuit. Necessary devices, including potential transformers, shall be provided on this receptacle circuit for metering
and synchronizing of shore power and the switchboard bus across the shore power breakers.
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