SECTION 16289
TRANSIENT VOLTAGE SURGE SUPPRESSION
PART 1 - GENERAL
1.1
1.2
1.3
1.4
DESCRIPTION
A.
This section describes the materials and installation requirements for Surge Protective
Devices (SPDs) and includes all service entrance, distribution and branch panel type
surge protective devices suitable for use as Type 1 or Type 2 devices per UL1449 3rd
Edition, applied to the line or load side of the utility feed inside the facility.
B.
This section also includes materials and installation of Transient Voltage Surge
Suppressors (TVSS) for the protection of electronic circuits and equipment.
RELATED WORK
A.
Section 16010, "General Electrical Requirements"
B.
Section 16123, "Wire and Cable"
C.
Section 16130, "Raceway and Boxes"
D.
Section 16060, "Secondary Grounding"
E.
Section 16421, "Motor Control"
REFERENCES
A.
UL 1449 3rd Edition (2009 Revision effective 9/29/2009).
B.
UL 1283.
C.
ANSI/IEEE C62.41, Recommended Practice for Surge Voltages in Low-Voltage AC
Power Circuits.
D.
ANSI/IEEE C62.45, Guide for Surge Testing for equipment connected to Low-Voltage AC
Power Circuits.
E.
IEEE 1100 Emerald Book.
F.
NEMA LS-1, 1992-(R2000) Low-Voltage Surge Protection Devices.
G.
National Fire Protection Association (NFPA 70: National Electrical Code).
SUBMITTALS
A.
Submit shop drawings, product data and manufacturer's installation instructions.
B.
The surge suppression submittals shall also include:
1.
2.
Copies of Manufacturer’s catalog data, technical information and specifications
on equipment proposed for use.
Copies of documentation stating that the Surge Protection Device is listed from a
3.
4.
5.
6.
7.
1.5
1.6
Nationally Recognized Testing Laboratory (NRTL) (UL, ETL, etc.) and are tested
and multi-listed to UL 1449 and UL 1283.
Copies of actual let through voltage data in the form of oscillograph results for
both ANSI/IEEE C62.41 Category 3 (combination wave) and B3 (Ring wave)
tested in accordance with ANSI/IEEE C62.45.
Copies of Noise Rejection testing as outlined in NEMA LS1-1993 (R2000)
Section 3.11. Noise rejection is to be measured between 50kHZ and 100MHz
verifying the devices noise attenuation. Must show multiple attenuation levels
over a range of frequencies.
Copies of Surge Fuse Testing. Each unit shall be surge tested with fusing in
series to verify that a transient of maximum surge current capacity/magnitude is
fully suppressed without fuse failure, operation or degradation per NEMA LS11992 (R2000) Section 3.9.
Copies of test reports from a recognized independent testing laboratory, capable
of producing 200kA surge current waveforms, verifying the suppressor
components can survive published surge current rating on both a per mode and
per phase basis using the ANSI/IEEE C62.41 impulse waveform C3 (8 x 20
microsecond, 20kV/10kA). Test data on an individual module is not acceptable.
Copy of warranty statement clearly establishing the terms and conditions to the
building/facility owner/operator.
WARRANTY
A.
All TVSS units shall be guaranteed to be free of defects in materials and workmanship for
a period of five years from the date of installation.
B.
Any suppressor which fails or operates improperly, even as a result of a direct lightning
strike, will be replaced by the manufacturer at no expense to the owner.
QUALITY ASSURANCE
A.
All suppressors shall be manufactured in the United States by a company normally
engaged in the design, development, and manufacture of such devices for electrical and
electronics systems equipment for a minimum period of five years.
B.
All manufacturers will provide products which do not interrupt power to the protected
system in the event of a suppressor failure, for life safety applications, i.e., fire alarm.
Written certification of this parameter shall be provided by the suppressor manufacturer.
C.
The suppressors listed in this specification shall not impair the performance of the
protected systems, including, but not limited to, the following parameters: degradation of
signal quality or levels, attenuation, and distortion. The suppressors shall not initiate
conditions which jeopardize the life safety features of fire alarms, communications,
energy management, and other code related protection.
PART 2 - PRODUCTS
2.1
208 VOLT AND 480 VOLT SUB PANEL SUPPRESSORS
A.
Suppressors shall be listed in accordance with UL 1449, "Standard for Safety, Transient
Voltage Surge Suppressors", and UL 1283, "Electromagnetic Interference Filters".
B.
Declared Maximum Continuous Operating Voltage (MCOV) shall be greater than 115
percent of the nominal system operating voltage and in compliance with test and
evaluation procedures outlined in the nominal discharge surge current test of UL1449 3rd
Edition, section 37.7. MCOV values claimed based on the component’s value or on the
30-minute 115% operational voltage test, section 38 in UL1449 will not be accepted.
C.
Unit shall have not more than 10% deterioration or degradation of the UL1449 3rd
Edition Voltage Protective Rating (VPR) due to repeated surges. Unit shall have a
monitoring option available to be able to test and determine the percentage of protective
available at all times.
D.
Suppressors shall be independently tested with the category C3 high exposure
waveform (20 kV, 10kA, 8/20 micro-second waveform) clamp voltage test results.
E.
Suppressors shall incorporate copper bus bars for the surge current path. Small round
wiring or plug-in connections shall not be used in the path for surge current diversion.
Surge current diversion modules shall use bolted connections to the bus bars for reliable
low impedance connections.
F.
The unit shall include an engineered solid-state high performance suppression filter
system, utilizing metal oxide varistors, and polypropylene capacitors.
G.
The unit shall contain 200,000 AIC fuses on each phase.
H.
The status of each phase shall be monitored on the front of the suppressor's enclosure.
I.
For three phase, four wire plus ground configurations, the unit shall provide protection in
all modes, Line to Neutral, Line to Ground, and Neutral to Ground.
J.
Suppressors shall be equipped with an audible alarm which shall activate upon device
failure. An alarm on/off switch shall be provided to silence the alarm and an alarm pushto-test switch shall be provided to test the alarm. The switches and alarm shall be
located on the front cover of the suppressor's enclosure.
K.
Suppressor shall meet or exceed the following criteria:
1.
Tested maximum single impulse surge current rating per mode shall be;
Line to Line
Line to Neutral
Line to Ground
Neutral to Ground
80,000A
80,000A
80,000A
80,000A
2.
Pulse life test: Capable of protecting against and surviving 2500 ANSI/IEEE
C62.41 Category C3(20kV, 10 kA) transients without failure or degradation of UL
1449 suppression rating by more than 10%.
3.
Protection Modes: SVR(6kV, 500A) and UL1449 3rd Edition VPR(6kV, 3kA) for
grounded WYE/delta and High Leg Delta circuits with voltages of (480Y/277),
(208Y/120), (600Y/347) 3-Phase/4 wire and (120/240) Split phase/3 wire circuits
shall be as follows and comply with test procedures outlined in UL1449 3rd
Edition section 37.6. Ratings shall not exceed the following:
System
Voltage
120/208
Mode
MCOV
L-N
L-G
150
150
UL 1449
UL 1449
2nd Ed. SVR
3rd Ed. VPR
400/400
700/700
500/500
700/700
N-G
150
400/400
L-L
277/480
L-N
L-G
320
320
800/800
1000/1000
N-G
L-L
4.
L.
300
550
900/900
700/700
900/1000
900/1000
1200/1200
320
800/800
1200/1200
1800/1800
1800/1800
The suppressor shall have a response time no greater than five nanoseconds for
any of the individual protection modes.
The unit shall include a high-frequency extended range tracking filter and shall be UL
1283 listed as an electromagnetic interference filter. The filter shall reduce fast rise-time,
high frequency, error producing transients. The filter shall provide minimum noise
attenuation as follows:
Attenuation Frequency 100KHz 1 MHz
Atttenuation dB 41
31
31
10MHz 100MHz
31
M.
The unit shall incorporate solid state, long life, externally mounted LED visual status
indicators that indicate the on line status of each phase of the unit.
N.
The unit shall incorporate an integral test point allowing easy off line diagnostic testing
which verifies the operational integrity of the unit's suppression filter system.
O.
The unit shall include mechanical lugs for each phase, neutral and ground. The lugs
shall accommodate up to #4 AWG copper conductor with integral fused disconnect
switch, and up to 1/0 AWG copper conductor without an integral fused disconnect switch.
P.
Suppressor manufacturer shall provide certified test data confirming a "fail-short" failure
mode.
Q.
Acceptable manufacturers:
Current Technology
Eaton Innovative Technology
Square D Surge Logic
2.2
TERMINAL STRIP HARD-WIRED (120 VAC) SUPPRESSORS
A.
Suppressors shall be listed in accordance with UL 1449, "Standard for Safety, Transient
Voltage" "Surge Suppressors".
B.
Suppressors shall consist of a three stage hybrid design: first stage - MOV, second
stage - inductor, third stage - silicon avalanche diode or MOV.
C.
Suppressors shall be internally fused in such a manner that power to protected
equipment is not interrupted in the event of a suppressor failure.
D.
Suppressors shall provide three suppression paths: line to neutral, line to ground, and
neutral to ground.
E.
Suppressors shall provide a maximum single impulse current rating of 25 kA (8/20 micro-
second waveform) per mode.
F.
Pulse life rating: Capable of protecting against and surviving 500 Category B3 transients
(6 kV - 1.2/50 micro-second, 3 kA - 8/20 micro-second waveform).
G.
Suppressors' maximum clamping voltage when subjected to Category B3 transients shall
not exceed 350 V peak.
H.
Visible indication of proper suppressor connection and operation shall be provided.
I.
The suppressor shall have a two year warranty.
J.
Acceptable manufacturers: Advanced Protection Technologies, Inc., Model TE/AC03UL,
or approved equal.
PART 3 - EXECUTION
3.1
3.2
3.3
GENERAL
A.
Install TVSS equipment according to manufacturer's recommendations.
B.
Contractor shall properly match TVSS equipment to equipment being protected, including
wire sizes, operating voltages and currents.
C.
Contractor shall coordinate with providers of all equipment being protected and provide
TVSS equipment which meets these specifications.
D.
Provide required NEMA 1 (indoor) or NEMA 3R (outdoor) enclosures for suppressors
adjacent to each electronic system cabinet, or coordinate with each electronic system
supplier to provide oversized cabinets to incorporate suppressors into electronic systems
cabinet.
E.
Electronic system equipment shall be protected by treating groups of related devices as a
"cluster" and protecting all hard wire circuits which enter and leave the cluster. All
equipment chassis within a protected cluster shall be bonded to a ground bar at the
"window" location for the cluster, the window being the common point where all hard wire
circuits enter or leave the cluster.
208 VOLT AND 480 VOLT SUB PANELS
A.
Install one secondary suppressor at each sub panel location, according to manufacturer's
recommendations.
B.
Conductors between suppressor and point of attachment shall be kept short and straight.
C.
Neutral and ground shall not be bonded together at secondary panelboard locations.
D.
Provide suitable three pole breaker in all panels as recommended by suppression
manufacturer to connect unit.
GROUND INSTALLATION
A.
Ground Bus Connections
1.
Provide local ground bus in each terminal cabinet housing surge protection
2.
3.
4.
B.
Surge Suppression Equipment Grounding
1.
2.
C.
Connect each suppressor to local ground bus in terminal cabinet with wire sized
as recommended by manufacturer. Where M block type
terminations/suppressors are used, bond ground rail to local ground bar with wire
as recommended by manufacturer.
Ensure that 120 VAC power source/supply suppressor is also grounded to same
local ground bus as suppressors provided in this section for same system (i.e.,
fire alarm, intercom, television, etc.).
Grounding Conductors
1.
2.
3.
4.
5.
6.
D.
equipment (with other materials as required).
Bond local ground bus to terminal cabinet with minimum #6 copper wire.
Connect terminal cabinet local ground bus to systems ground bus with minimum
#6 copper insulated wire (unless otherwise noted) in conduit.
Note that the systems ground bar is also to be used for power transformation
ground (480 V to 208 V) where applicable.
Conductors shall be a minimum size of #12 THWN (in conduit, insulated) unless
otherwise noted or otherwise recommended by the manufacturer.
Conductors shall be as short as possible.
No bend radius shall be less than 6 inches or more than 90 degrees.
Conductors shall be secured at 12 inch intervals with an approved copper clamp.
Grounding conductors shall be properly connected to the building service ground
by approved clamps.
Do not bundle unprotected conductors with protected conductors.
Grounding Connectors
1.
2.
3.
Connectors, splicers, and other fittings used to interconnect grounding
conductors, or bond to equipment or grounding bars, shall be approved by UL or
NEC for the purpose.
All connectors and fittings shall be of the one time crimp or compression setscrew type solderless connection.
Special treatment to fittings, lugs, or other connectors of dissimilar material shall
be applied to prevent electrogalvanic action.
END OF SECTION