8.
[Fixed] [Adjustable] ground-fault delay.
9.
[Ground-fault I2t switch.]
10. [Overload] [and] [short-circuit] [and] [ground-fault] trip
indicators shall be provided.
2.10.1.2
Molded-Case Circuit Breakers
NEMA AB 1 and UL 489.
2.10.2
Fuses, Medium-Voltage, Including Current-Limiting
2.10.2.1
Construction
Units shall be suitable for outdoor use. Fuses shall have integral
blown-fuse indicators. All ratings shall be clearly visible.
2.10.2.2
Ratings
[Expulsion-type] [Current-limiting] power fuses shall have ratings in
accordance with ANSI C37.46 and as follows:
Nominal voltage.................................................[_____].
Rated maximum voltage...........................................[_____].
Maximum symmetrical interrupting capacity.......................[_____].
Rated continuous current........................................[_____].
BIL.............................................................[_____].
2.10.2.3
E-Rated, Current-Limiting Power Fuses
E-rated, current-limiting, power fuses shall conform to ANSI C37.46.
2.10.2.4
C-Rated, Current-Limiting Power Fuses
C-rated, current-limiting power fuses shall open in 1000 seconds at
currents between 170 and 240 percent of the C rating.
2.10.3
Fuses, Low-Voltage, Including Current-Limiting
Low-voltage fuses shall conform to NEMA FU 1. Time delay and nontime delay
options shall be as [shown] [specified]. Equipment provided under this
contract shall be provided with a complete set of properly rated fuses when
the equipment manufacturer utilizes fuses in the manufacture of the
equipment, or if current-limiting fuses are required to be installed to
limit the ampere-interrupting capacity of circuit breakers or equipment to
less than the maximum available fault current at the location of the
equipment to be installed. Fuses shall have a voltage rating of not less
than the phase-to-phase circuit voltage, and shall have the time-current
characteristics required for effective power system coordination.
2.10.3.1
Cartridge Fuses
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NOTE: Class RK1 provides high current limitation
SECTION 16375A
Page 39
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