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OM
2012
(4
(4
(9)
04
The
flJf7CtiW
d
the ph~g i:it:?rlock
relay
(:>
is to ccc!se 1.1;e output
load
contuctor
to
c\jen
in the cvont
the cat!e
plug corlnccio:
become;
accidental])
di;sonnectcd
from the aircraft
during
power delivery;
or if an citenpt
is
Made
to
defivar
power when the output
cable
is not connected
to the air-
craft.
Twenty-tight-volt,
direct
current
for operation
of the relay
is
supplied
from the aircraft
either
through
an on-boanl
tran=fom;cr-rectifier,
or from a twenty-eight-voIt,
c!ectrical
system.
Connection
from the air-
craft to the interlock
relcy
is made through
terminals
E a,nd F 0;; the
otltput
Cclbk
plug
connzct~x.
Test-bank
switch
-
Asp
st, toggle
switch
(18)~ rovides
a means of by-passing
the inter-
lock relay
(1)
when supplying
power
to
a
load bank
or
to
an aircraft
not equipped
with
a plug interlocl:
system.
.
Resistor
,
A Too-ohm,
25-w&t
resistor
(21)
is connected
in series with
the plug
interlock
reiay
to protect
the relay
in the event
that phase C contacts
in the load contactor
should
fail
to close when the generator
ON
switch
is operated.
Fuse-interlock
relay
The function
of the fuse-interlock
relay
'(2) is to interrupt
the load con-
tactor
holding
coil circuit
and remove
the load in case of a "blown!'
fuse (17)
in the protective
relay
coil
circuit.
Connector
A twenty-six
contact
connector
(19)
provides
a quick-disconnect
facility
for all wiring
to the tray electrical
components
so that the
COMplete
tray assembly
may be removed
quickly
and easily.
Aug
25185
l-l
Page 21
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