lockout relay, device 86T located in the [associated metal-clad
switchgear] [instrument and relay cabinet].
h.
[Single] [Three] phase secondary potential test blocks with
associated test plug, quantity as shown.
i.
[Single] [Three] phase secondary current test blocks with
associated test plug for [each current transformer circuit] [each
three-phase set of current transformers], as indicated.
j.
[_____]
2.11.2
Line Tie Circuit Breakers for Substations
**************************************************************************
NOTE: Delete either 86B or 87B relays if not
required.
**************************************************************************
The line tie circuit breaker shall be rated [as shown] [the same as the
incoming line units], and shall be electrically and mechanically
interlocked with other high-voltage items of equipment as shown. The line
tie circuit breaker shall be equipped with control and monitoring system
items the same as described for the incoming line circuit breaker. The
instrument and relay cabinet shall house the same equipment listed for the
incoming line circuit breaker cabinet except [_____]. The cabinet shall
also house three bus differential relays, device 87B, and an auxiliary
lockout relay, device 86B.
2.12
SUBSTATION AND SWITCHGEAR PROTECTIVE RELAYS
**************************************************************************
NOTE: Ranges selected will be based on the
coordination study. Refer to TM 5-811-1 and TM
5-811-14 for guidance regarding protective relays.
**************************************************************************
[Solid-state] [and] [Electromechanical] [and] [Microprocessor-based]
protective relays shall be as shown and shall be of a type specifically
designed for use on power switchgear or associated electric power
apparatus. Protective relays shall conform to IEEE C37.90. Relays and
auxiliaries shall suitable for operation with the instrument transformer
ratios and connections provided.
2.12.1
Construction
Relays for installation in metal-clad switchgear shall be of the
semi-flush, rectangular, back-connected, dustproof, switchboard type.
Cases shall have a black finish and window-type removable covers capable of
being sealed against tampering. Relays shall be of a type that can be
withdrawn, through approved sliding contacts, from fronts of panels or
doors without opening current transformer secondary circuits, disturbing
external circuits, or requiring disconnection of any relay leads.
Necessary test devices shall be incorporated within each relay and shall
provide a means for testing either from an external source of electric
power or from associated instrument transformers. Each relay shall be
provided with an operation indicator and an external target reset device.
Relays shall have necessary auxiliaries for proper operation. Relays and
auxiliaries shall be suitable for operation with the instrument transformer
SECTION 16475A
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