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Electrically powered IDS equipment shall operate on 120 or 240 volt [60]
[50] Hz AC sources as shown. Equipment shall be able to tolerate
variations in the voltage source of plus or minus 10 percent, and
variations in the line frequency of plus or minus 2 percent with no
degradation of performance.
1.3.7
Power Line Surge Protection
Equipment connected to alternating current circuits shall be protected from
power line surges. Equipment protection shall withstand surge test
waveforms described in IEEE C62.41. Fuses shall not be used for surge
protection.
1.3.8
Sensor Wiring and Communication Circuit Surge Protection
Inputs shall be protected against surges induced on sensor wiring. Outputs
shall be protected against surges induced on control and sensor wiring
installed outdoors and as shown. All communications equipment shall be
protected against surges induced on any communications circuit. All cables
and conductors, except fiber optics, which serve as communications circuits
from the console to field equipment, and between field equipment, 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 wireline circuit shall be
installed within 900 mm 3 feet of the building cable entrance. Fuses shall
not be used for surge protection. The inputs and outputs shall be tested
in both normal mode and common mode using the following two waveforms:
a.
A 10 microsecond rise time by 1000 microsecond pulse width
waveform with a peak voltage of 1500 volts and a peak current of
60 amperes.
b.
An 8 microsecond rise time by 20 microsecond pulse width waveform
with a peak voltage of 1000 volts and a peak current of 500
amperes.
1.3.9
System Reaction
All alarms shall be annunciated on the displays within 1 second of their
occurring at a local processor.
1.3.10
Environmental Conditions
1.3.10.1
Interior, Controlled Environment
All system components, except the console, installed in interior locations
having controlled environments shall be rated for continuous operation
under ambient environmental conditions of 2 to 50 degrees C 36 to 122
degrees F dry bulb and 20 to 90 percent relative humidity, noncondensing.
1.3.10.2
Interior, Uncontrolled Environment
All system components installed in interior locations having uncontrolled
environments shall be rated for continuous operation under ambient
environmental conditions of minus 18 to plus 50 degrees C 0 to 122 degrees F
dry bulb and 10 to 95 percent relative humidity, noncondensing.
SECTION 13721A
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