meters shall be of the [drawout switchboard type] [socket mounted [outdoor]
[indoor] type] having a [15] [30] [60] [_____] minute, cumulative form,
demand register meeting ANSI C12.4 and provided with not less than 2-1/2
stators. [Watthour demand meters shall have factory-installed electronic
pulse initiators. Pulse initiators shall be solid-state devices
incorporating light-emitting diodes, phototransistors, and power
transistors, except that mercury-wetted output contacts are acceptable.
Initiators shall be totally contained within watthour demand meter
enclosures, shall be capable of operating up to speeds of 500 pulses per
minute with no false pulses, and shall require no field adjustments.
Initiators shall be calibrated for a pulse rate output of 1 pulse per 1/4
disc revolution of the associated meter and shall be compatible with the
indicated equipment].
2.10.6
Protective Relaying
**************************************************************************
NOTE: Ranges selected will be based on the
coordination study. Refer to TM 5-811-1/AF AFJMAN
32-1080 and TM 5-811-14 for guidance regarding
protective relays.
**************************************************************************
2.10.6.1
General
[Solid-state] [Microprocessor-based] protective relays shall be provided 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 be suitable for
operation with the instrument transformer ratios and connections provided.
2.10.6.2
Construction
Relays shall be dustproof and moisture resistant. 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 ratios and connections
provided.
2.10.6.3
Ratings
Relays shall be the manufacturer's standard items of equipment with
appropriate ranges for time dial, tap, and other settings. Relay device
numbers shall correspond to the function names and descriptions of IEEE
C37.2.
2.11
SURGE ARRESTERS
**************************************************************************
NOTE: Surge arresters should be located at both the
riser pole and at the equipment. Dead front
transformer primary compartments may require special
provisions to accommodate the arresters.
**************************************************************************
Surge arresters shall comply with NEMA LA 1, IEEE C62.1, ANSI C62.2, and
SECTION 16375A
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