transformer neutral [grounding resistor] current transformer].
m.
Directional overcurrent relay, device 67N.
n.
One three-phase or three single-phase transformer differential
relays, device 87T, and an auxiliary lockout relay, device 86T,
arranged to trip and to lock out this circuit breaker and the
associated transformer primary circuit breaker.
o.
One three-phase or three single-phase bus differential relays
device 87B, and an auxiliary lockout relay, device 86B, arranged
to trip and lock out the associated circuit breaker and other
circuit breakers as indicated.
p.
[Single-] [Three-] phase secondary potential test blocks with
associated test devices, quantity as shown.
q.
[Single-] [Three-] phase secondary current test blocks with
associated test devices, quantity as shown.
r.
Key-interlocking shall be provided with the primary disconnecting
switch serving the associated transformer.
s.
[_____].
2.7.11.2
Auxiliary Compartments
**************************************************************************
NOTE: Where switchgear aisle space of sufficient
area is available, the station battery installation
will be mounted there. Coordinate with NFPA 70 and
IEEE C2 for clearances. The designer should
indicate the panelboard requirements on the project
drawings.
**************************************************************************
Control and instrument transformers and panelboards shall be provided and
housed in compartments, [unless otherwise noted,] and shall supply control
power and instrument voltage to each bus section of the switchgear lineup
and remote devices as required. Compartments shall be provided with a
hinged door. Any interconnection wiring and conduit needed to connect the
switchgear lineup or other devices requiring control power or instrument
voltage shall be provided and indicated on the detail drawings. Equipment
items shall include the following:
a.
[Three] [_____] potential transformers.
b.
[_____] control power transformers.
c.
[_____] low-voltage alternating-current panelboards and [_____]
low-voltage direct-current panelboards with main and branch
circuits as shown [, located in the switchgear aisle where
indicated] [, and with equipment as specified in paragraph
AUXILIARY SUBSTATION EQUIPMENT].
d.
[_____].
SECTION 16311A
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