Specifications - State of Delaware

SECTION 264300 - TRANSIENT VOLTAGE SURGE SUPPRESSION (TVSS): continued
2. Documentation of UL 1449 testing including suppression ratings. For units supplied with
a fused disconnect, submit the UL 1449 voltage suppression rating with a fused
disconnect.
3. Documentation of minimum repetitive surge current capacity testing and documentation
of single pulse surge current capacity testing in accordance with ANSI/IEEE C62.41.
4. Documentation of short circuit fuse testing in accordance with the following: Each
design configuration shall be short circuit tested in accordance with the type of fusing
used in the suppression path. Testing shall include application of a sustained overvoltage
that causes the unit to enter a bolted fault condition. This bolted fault condition shall
occur with the full rated AIC current of the fuse available. The fuse shall fail in a safe
manner with no physical or structural damage to the unit and any failure shall be selfcontained
within the unit.
5. Documentation of surge current fuse testing in accordance with the following: Each
design configuration shall be surge tested with the fusing in series to verify that a surge of
maximum surge current capacity magnitude is fully suppressed. This testing shall also
verify that, in the event of fuse failure, the full magnitude of the event shall be suppressed
prior to fuse failure.
1.04 WARRANTY:
A. The manufacturer shall provide a five-year limited warranty from the date of shipment against
failure when installed in compliance with applicable national/local electrical codes, and the
manufacturer's installation, operation, and maintenance instructions.
PART 2 - PRODUCTS
2.01 MANUFACTURERS:
A. Subject to compliance with requirements, provide TVSS units manufactured by one of the
following:
1. Current Technology, Inc.
2. Liebert Corp.
3. L.E.A. International.
B. All other manufacturers shall submit detailed compliance or exception statements to all
provisions of this Specification, at least 10 days prior to Bid opening to allow consideration.
Additionally, manufacturers shall submit independent test data from a nationally recognized
testing laboratory verifying the following: life cycle testing, overcurrent protection, UL 1449,
noise attenuation, and surge current capacity.
2.02 TVSS GENERAL:
A. TVSS units shall be compatible with the electrical system, voltage, current, and distribution
configuration indicated. Service entrance rated units shall contain an integral fused disconnect
switch. The unit enclosures shall be NEMA 12.
B. The unit shall include an engineered suppression system, using arrays of individually fused
nonlinear voltage dependent metal oxide varistors (MOVs) with matched operating
characteristics.
1. The suppression system shall not use gas tubes, spark gaps, or silicon avalanche diodes
(SADs).
2. The modules shall be constructed in a manner that ensures surge current sharing.
3. All internal connections associated with the suppression filter system and subject to surge
currents shall use low-impedance copper bus bar and appropriately sized copper wire.
264300-2 DEAN264300.DOC