c.
Voltage protection threshold, line to neutral, starts at no more
than 211 volts peak on the 120 VAC line.
d.
The transient voltage surge suppressor must have an independent
secondary stage equal to or greater than the primary stage joule
rating.
e.
The primary suppression system components must be pure Silicon
Avalanche Diodes.
f.
Silicon Avalanche Diodes or Metal Oxide Varistors are acceptable
in the independent secondary suppression system.
g.
The Transient Suppression System shall incorporate an indication
light which denotes whether the primary and/or secondary transient
protection components is/are functioning.
h.
All system functions of the Transient Suppression System must be
individually fused and not short circuit the AC power line at any
time.
i.
The Transient Suppression System shall incorporate an EMI/RFI
noise filter with a minimum attenuation of 13 dB at 10 kHz to 300
MHz.
j.
The system must comply with IEEE C62.41, Class "B" requirements
and be tested according to IEEE C62.45.
k.
The system shall operate at -20 degrees C to +50 degrees C.
2.4.2.2
Telephone and Communication Line Surge Protection
Provide transient surge protection to protect the DDC controllers and LAN
related devices from surges that occur on the phone lines (modem or direct
connect) and on inter-unit LAN communications. Devices shall be UL listed.
a.
The surge protection shall be a rugged package with continuous,
non-interrupting protection and not use crowbar technology.
Instant automatic reset after safely eliminating transient surges,
induced lightning, and other forms of transient over voltages.
b.
Unit must react within 5 nanoseconds using only solid-state
silicone avalanche technology.
c.
Unit shall be installed at the proper distance as recommended by
the manufacturer.
2.4.2.3
Controller Input/Output Protection
Controller input/output points shall surge protection with optical
isolation, metal oxide varistors (MOV), or silicon avalanche devices.
Fuses are not permitted for surge protection.
2.4.3
Wiring
Provide complete electric wiring for DDC System, including wiring to
transformer primaries. Control circuit wiring shall not run in the same
conduit as power wiring over 100 volts. Circuits operating at more than 100
Volts shall be in accordance with Section 16402 INTERIOR DISTRIBUTION
SECTION 15910N
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