standby protection switch], communication links, antenna systems,
communication links surge and overvoltage protection, and powerline surge
protection. Computing devices, as defined in 47 CFR 15, shall be certified
to comply with the requirements for Class A computing devices and labeled
as set forth in 47 CFR 15. [The system shall be compatible with the
existing two-way radio equipment shown.] [The system shall be interfaced
with the UMCS as shown.]
1.2.2
Environmental Requirements
Equipment to be utilized indoors shall be rated for continuous operation
All other equipment shall be rated for continuous operation under the
ambient environmental temperature, pressure, humidity, and vibration
conditions specified or normally encountered for the installed location.
1.2.3
Electrical Requirements
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power sources and UPS if required.
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The equipment shall operate from an AC voltage source as shown, plus or
minus 10 percent, at a frequency of 60 Hz, plus or minus 2 percent.
1.2.4
Power Line Surge Protection
Power Line Surge Protection Equipment connected to AC circuits shall be
protected from power line surges. Equipment shall meet the requirements of
IEEE C62.41. Fuses shall not be used for surge protection.
1.2.5
Communications Links Surge Protection
protected against surges induced on any communications link. Cables and
conductors which serve as communications links shall have surge protection
circuits installed at each end. Protection shall be furnished at equipment
and additional triple electrode gas surge protectors rated for the
application on each circuit shall be installed within 1 meter 3 feet of the
building cable entrance. Surge protection shall meet the requirements of
NFPA 780 guidelines and specifications and shall be able to withstand the
following:
a. A 10 microsecond by 1000 microsecond waveform with a peak voltage of
1500 volts and a peak current of 60 amperes.
b. An 8 microsecond by 20 microsecond waveform with a peak voltage of
1000 volts and a peak current of 500 amperes. Fuses shall not be used
for surge protection.
1.2.6
Communications Links Overvoltage Protection
conductors which serve as communications links shall have overvoltage
protection for voltages up to 480 Vac rms, 60 Hz installed. Instrument
fuses or fusible resistors are acceptable for this application.
SECTION 16798A
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