SECTION 16418
SURGE PROTECTIVE DEVICES
PART 1 - GENERAL
1.01
REQUIREMENTS
A.
1.02
SCOPE
A.
1.03
The general provisions of the Contract, including General and Supplementary
Conditions and General Requirements, apply to the work specified in this
Section.
The work under this Section shall include furnishing and installing Surge
Protective Devices (SPDs), formerly TVSS, for the protection of AC electrical
circuits as shown on the Drawings and herein specified.
QUALITY ASSURANCE
A.
All equipment, materials, and their installation shall conform to the requirements
of the National Electrical Code (NEC), local code requirements, and these
Specifications.
B.
SPD units and all components shall be designed, manufactured and tested in
accordance with the most recent editions of ANSI/UL 1449 and UL 1283.
C.
Equipment shall be constructed in accordance with National Electrical
Manufacturer's Association (NEMA) standards (NEMA LS-1).
D.
Submittals are required in accordance with SECTION 16010 of these
Specifications. The submittals shall contain, at a minimum, the following:
1.
Provide verification that the SPD complies with the required ANSI/UL
rd
1449 3 Edition listing by Underwriters Laboratories (UL) or other
Nationally Recognized Testing Laboratory (NRTL) acceptable to Fairfax
County Department of Public Works and Environmental Services.
Compliance may be in the form of a file number that can be verified on
UL’s website or on any other NRTL’s website, as long as the website
contains the following information at a minimum: model number, SPD
Type, system voltage, phases, modes of protection, Short Circuit Current
Rating (SCCR), Voltage Protection Ratings (VPRs) for all modes,
Maximum Continuous Operating Voltage rating (MCOV) and Nominal
Discharge Current (In). UL data and visual inspection takes precedence
over manufacturer’s published documentation.
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SURGE PROTECTIVE DEVICES
SECTION 16418
2.
For SPD external mounting applications include electrical/mechanical
drawings showing unit dimensions, weights, installation instruction
details, and wiring configuration.
3.
Where applicable the following additional information shall be included in
the submittals:
a.
Descriptive bulletins.
b.
Product sheets.
PART 2 - PRODUCTS
2.01
2.02
MANUFACTURERS
A.
Subject to compliance, the following SPD manufacturers are acceptable:
ADVANCED PROTECTION TECHNOLOGIES (APT) as listed herein or TOTAL
PROTECTION SOLUTIONS (TPS), or the switchboard manufacturers SPD’s for
internal or external mounting in or on switchboards shall also be acceptable.
Panelboard manufacturers SPD’s for external mounting only shall also be
acceptable.
B.
The listing of specific manufacturers above does not imply acceptance of their
products that do not meet the specified ratings, features, and functions.
Manufacturers listed above are not relieved from meeting these specifications in
their entirety.
VOLTAGE SURGE SUPPRESSION – GENERAL
A.
Electrical Requirements:
1.
Refer to Drawings for operating voltages and unit configurations.
2.
SPD’s shall be UL labeled with 200kA Short Circuit Current Rating
(SCCR). Fuse ratings shall not be considered in lieu of demonstrated
withstand testing SPDs.
3.
Maximum Continuous Operating Voltage (MCOV):
System Voltage
208Y/120
480Y/277
4.
Allowable System Voltage Fluctuation (%)
25%
15%
MCOV
150V
320V
The suppression system shall incorporate thermally protected metaloxide varistors (MOVs) as the core surge suppression component for the
service entrance and all other distribution levels. The system shall not
utilize silicon avalanche diodes, selenium cells, air gaps, or other
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SURGE PROTECTIVE DEVICES
SECTION 16418
components that may crowbar the system voltage leading to system
upset or create any environmental hazards.
5.
The SPD shall provide surge current path for all modes of protection:
L-N, L-G, and N-G for Wye systems; L-L, L-G in Delta and impedance
grounded Wye systems.
6.
All SPD’s applied to the distribution system shall have a 20kA Nominal
Discharge Current (In) rating regardless of their SPD Type (includes
Types 1 and 2) or operating voltage. SPDs having an In less than 20kA
shall not be acceptable.
7.
ANSI/UL 1449 Listed Voltage Protection Ratings (VPRs) shall not exceed
the following:
System Voltage
208Y/120
480Y/277
L-N
800V
1200V
L-G
800V
1200V
L-L
1200V
2000V
N-G
800V
1200V
(Numerically lower is allowed/preferred; old-style Suppressed Voltage
Ratings (SVRs) shall not be submitted, nor evaluated due to outdated
less-strenuous testing).
B.
SPD Design:
1.
SPD shall be UL listed Type 1 or Type 2, intended for use without need
for external or supplemental overcurrent controls. Every suppression
component of every mode, including N-G, shall be protected by internal
overcurrent and thermal over temperature controls. SPD’s relaying upon
external or supplementary installed safety disconnects do not meet the
intent of this specification.
2.
The SPD shall be maintenance free and shall not require any user
intervention throughout its life.
SPDs containing items such as
replaceable modules, replaceable fuses, or replaceable batteries shall
not be accepted. SPDs requiring any maintenance of any sort such as
periodic tightening of connections shall not be accepted. SPDs requiring
user intervention to test the unit via a diagnostic test kit or similar device
shall not be accepted.
3.
The surge current shall be equally distributed to all MOV components to
ensure equal stressing and maximum performance. The surge
suppression platform must provide equal impedance paths to each
matched MOV. Designs incorporating replaceable SPD modules shall not
be accepted.
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SURGE PROTECTIVE DEVICES
C.
2.03
SECTION 16418
4.
SPD shall have UL 1283 EMI/RFI filtering with minimum attenuation of
50dB at 100kHz.
5.
SPD shall include visual LED diagnostics including a minimum of one
green LED indicator per phase, and one red service LED. SPD shall
include an audible alarm with on/off silence function and diagnostic test
function. SPDs for branch circuit panels not employing an on/off silence
function will be acceptable.
6.
The SPD must include Form C dry contacts (one NO and one NC) for
remote monitoring of its status. Both the NO and NC contacts shall
change state under any fault condition or if power is removed from the
SPD. Service entrance locations shall have two sets of NO and NC
contacts for building power monitoring.
7.
SPDs at service entrance locations shall be provided with a surge event
counter with a reset button allowing the surge counter to be zeroed. The
surge event count shall have a lithium battery backup or be stored in nonvolatile memory and displayed after power is restored.
8.
Internally mounted SPDs in switchboards shall be designed to interface
with the electrical assembly via factory installed conductors only and not
mounted directly to bus bars.
9.
Sidemount SPDs shall be factory sealed in order to prevent access to the
inside of the unit. Sidemount SPDs shall have factory installed phase,
neutral, ground and remote status contact conductors factory installed
and shall have a pigtail of conductors protruding outside of the enclosure
for field installation. Top mount SPDs for switchboards where sidemount
is not feasible due to space constrictions or space allowed for future
expansion.
SPDs shall have NEMA 1 general purpose enclosures, unless otherwise noted or
required for the environment. SPDs located in kitchens or other areas subject to
possible water exposure shall be NEMA 4X.
SYSTEM APPLICATION
A.
The SPD applications covered under this section include switchboard
assemblies, motor control centers (if present), distribution and branch circuit
panelboards. All SPDs shall be tested and demonstrate suitability for application
within ANSI/IEEE C62.41 Category C, B, and A environments.
B.
The minimum current capability (single pulse rated) per phase shall be:
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SURGE PROTECTIVE DEVICES
SECTION 16418
Service Entrance or Automatic Transfer Switch:
Distribution Panelboards & MCC:
Branch Circuit Panelboards:
C.
2.04
250kA
150kA
100kA
SPDs installed on the load side of the service entrance disconnect shall be Type
1. Other SPD locations beyond the service entrance shall be Type 1 or Type 2.
SERVICE ENTRANCE SWITCHBOARD/PANELBOARD LOCATIONS [Engineer to
edit. Delete SE Distribution Panels if not using. These are used mostly for ball
fields]
A.
The SPD application covered under this section is for service entrance
switchboard(s) and service entrance distribution panelboard(s).
Service
entrance located SPDs shall be tested and demonstrated suitability for
application within ANSI/IEEE C62.41 Category C environments.
B.
The SPD shall be from the same manufacturer as the switchboard. The SPD
shall be internal and panel mounted in the front face of the switchboard at the
assembly point by the original equipment manufacturer. Alternatively, the SPD
from the same or different manufacturer may be mounted external to the
switchboard.
C.
The SPD for service entrance distribution panelboards shall be mounted external
and adjacent to the panelboard.
D.
Locate the SPD (Type 1) on the load side of the main disconnect device, as
close as possible to the phase conductors and the ground neutral bar.
E.
The SPD shall be connected through a three pole, 60A circuit breaker to serve
as the disconnecting means for the SPD. This disconnect shall be located in
immediate proximity to the SPD. Connections shall be made via conductors
originating in the SPD and shall be kept as short as possible.
1.
As an option, internal mounted SPD’s in switchboards may be provided
with an integral disconnect switch in lieu of using a 60A circuit breaker to
serve as the SPD disconnecting means. Connections shall be made via
conductors originating in the SPD and connected to the bus bars with
suitably sized tap lugs, factor installed. Conductors shall be kept as short
as possible.
F.
All monitoring and diagnostic features shall be visible from the front of the
equipment.
G.
The service entrance distribution panelboard external SPD shall be ADVANCED
PROTECTION TECHNOLOGIES (APT) Model No.: [Engineer to edit]
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SURGE PROTECTIVE DEVICES
2.05
SECTION 16418
•
TE02XAS25E1X for 120/208V SE distribution panelboards
•
TE04XAS25E1X for 277/480V SE distribution panelboards
POWER DISTRIBUTION AND BRANCH CIRCUIT PANELBOARD LOCATIONS
A.
The SPD application covered under this section includes distribution and branch
circuit panelboards. The SPD units shall be tested and demonstrate suitability
for application within ANSI/IEEE C62.41 Category B environments.
B.
The SPD shall be mounted externally and adjacent to the panelboard. The SPD
shall be connected through a three pole, 30A circuit breaker to serve as the
disconnecting means for the SPD. Connections shall be made via conductors
originating in the SPD and shall be kept as short as possible.
C.
SPDs shall be flush mounted adjacent flush mounted panelboards and surface
mounted adjacent to or attached to surface mounted panelboards.
D.
The external SPD shall be ADVANCED PROTECTION TECHNOLOGIES (APT)
Model No.: [Engineer to edit]
E.
•
TE02XDS154XA for 120/208V distribution panelboards
•
TE04XDS154XA for 277/480V distribution panelboards
•
TE02XDS104XA for 120/208V branch circuit panelboards
•
TE04XDS104XA for 277/480V branch circuit panelboards
SPDs for motor control centers (MCC) shall be from the same manufacturer as
the MCC. The SPD shall be internal and panel mounted in the front face of the
MCC at the assembly point by the original equipment manufacturer.
Alternatively, the SPD from the same or different manufacturer may be mounted
external to the MCC. All monitoring and diagnostic features shall be visible from
the front of the equipment. [Engineer edit out if not using MCCs]
PART 3 - EXECUTION
3.01
INSTALLATION
A.
SPD shall be installed per manufacturer’s installation instructions with lead
lengths as short (less than 24”) and straight as possible. Gently twist conductors
together.
B.
This Contractor may reasonably rearrange the circuit breaker locations to ensure
the shortest and straightest possible leads for the SPD connections.
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SURGE PROTECTIVE DEVICES
3.02
3.03
SECTION 16418
C.
Before energizing, this Contractor shall verify service and separately derived
system neutral to ground bonding jumpers per the National Electrical Code.
D.
Repaint marred and scratched surfaces with touch-up paint to match original
finish.
TRAINING
A.
This Contractor shall provide four (4) hours of technical service training to the
Owner’s technical and maintenance staff.
B.
The training session shall be conducted by a manufacturer’s qualified
representative. The training program shall consist of instruction on operation of
the assembly.
WARRANTY
A.
SPDs and supporting components and accessories shall be guaranteed by the
manufacturer to be free of defects in material and workmanship for a period of
ten (10) years from the date of substantial completion of service and activation of
the system to which the suppressor is attached. Additionally, during the
applicable warranty period, and SPD which fails due to any electrical anomaly,
including lightning, shall be replaced by the manufacturer without charge.
Special or optional warranties in excess of the warranty period for purposes of
this bid are not acceptable. Standard unit warranties in excess of the warranty
period stated herein are acceptable. Refer to SECTION 01740 for the start of
the warranty period.
B.
Since “Acts of Nature” or similar statements typically include the threat of
lightning to which the SPDs shall be exposed, any such clause limiting warranty
responsibility in the general conditions of this specification shall not apply to this
particular section. The warranty must specifically provide for unlimited free
replacements of the SPD in the event of failure caused by the effects of lightning
and all other electrical anomalies. The warranty shall cover the entire device, not
just various components, such as modules only.
END OF SECTION
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