USACE / NAVFAC / AFCESA / NASA UFGS-26 18 23.00 40 (August 2008)
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Preparing Activity: NASA Superseding
UFGS-26 18 23.00 40 (July 2007)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 26 18 23.00 40
MEDIUM-VOLTAGE SURGE ARRESTERS
08/08
NOTE: This specification covers the requirements for surge and lightning arresters
of the distribution, intermediate, and station types. Show type, voltage, mounting,
and connection details on drawings.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome. Direct them
to the technical proponent of the specification. A listing of technical proponents
, including their organization designation and telephone number, is on the Internet.
Submit recommended changes to a UFGS as a Criteria Change Request (CCR).
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text are automatically deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[ASTM INTERNATIONAL (ASTM)ASTM A 123/A 123M(2008) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel ProductsASTM A 153/A 153M(2005) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware][INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)IEEE C62.11(2005; Amendment A 2008) Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits (>1kV)IEEE Std 386(2006) Standard for Separable Insulated Connector Systems for Power Distribution Systems Above 600V][NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA LA 1(1992; R 1999) Standard for Surge Arresters][NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70(2007; AMD 1 2008) National Electrical Code - 2008 Edition]1.2 GENERAL REQUIREMENTS
NOTE: If Section 26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS is not
included in the project specification, insert applicable requirements therefore
and delete the following paragraph.
Section 26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS applies to work specified in this section.
Submit Equipment and Performance Data for surge arresters including life, test, system functional flows, safety
features, and mechanical automated details.
1.3 SUBMITTALS
NOTE: Review Submittal Description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Keep submittals to the minimum required for adequate quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, use a code of
up to three characters within the submittal tags following the "G" designation
to indicate the approving authority. Codes for Army projects using the Resident
Management System (RMS) are: "AE" for Architect-Engineer; "DO" for District
Office (Engineering Division or other organization in the District Office);
"AO" for Area Office; "RO" for Resident Office; and "PO" for Project Office.
Codes following the "G" typically are not used for Navy, Air Force, and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that reviews the submittal for the Government.] Submit the following in
accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-02 Shop Drawings
Provide the following shop drawings according to requirements set forth in this section:
Fabrication Drawings
Installation Drawings
SD-03 Product Data
Submit Equipment and Performance Data for surge arresters in accordance with paragraph entitled,
"General Requirements," of this section.
Submit Manufacturer's product data for the following items:
Surge Arresters
Mounting Brackets
SD-08 Manufacturer's Instructions
Installation Instructions
Surge Arresters
SD-10 Operation and Maintenance Data
O & M Manuals
Surge Arresters
PART 2 PRODUCTS
2.1 EQUIPMENT
Provide design, fabrication, testing, and performance of arresters that complies with IEEE C62.11, NEMA LA 1.
NOTE: Provide a voltage rating of arresters in accordance with manufacturer's
recommendations to meet the maximum continuous line-to-ground operating voltage
(MCOV). Consider system neutral, whether grounded, ungrounded, or effectively
grounded for all possible conditions of operations, including Phase-to-ground
faults, when selecting arrestors.
Provide arresters that utilize metal oxide varistor and gapped arrester technologies.
Provide arresters that are contained within a polymer housing. Provide arrester that is designed to be non-fragmenting
to provide extra safety to personnel and equipment. For arresters utilizing a hanger frame type mounting bracket,
provide a frame that is non-corrosive track resistant glass filled polyester or other suitable non-corrosive/non-conductive
material providing high mechanical strength. Provide arrester mounting hardware that is designed for installation
in severe salt-spray atmosphere and that is of a corrosion-resistant metal or zinc-coated in accordance with
[ASTM A 123/A 123M] [ASTM A 153/A 153M].
The arrester housing is molded of EPDM insulating rubber which provides deadfront safety and overvoltage system
protection in an insulated, fully shielded, submersible, deadfront device that conforms to IEEE Std 386.
2.2 FABRICATION DRAWINGS
Submit fabrication drawings in accordance with paragraph entitled, "Equipment," of this section. Provide drawings
that show assembly and fabrication details performed in the factory.
2.3 SURGE ARRESTERS
2.3.1 O & M Manuals, Surge Arresters
Provide O & M Manuals for surge arresters specified within these plans and specifications.
2.3.2 Distribution
Provide combination spark gap and metal oxide varistor type distribution arresters. Provide corrosion resistant
mounting hardware.
2.3.2.1 Distribution - Riser-Pole Class
Distribution - Provide combination spark gap and metal oxide varistor type riser-pole class. Provide corrosion
resistant mounting hardware.
2.3.2.2 Distribution - Underground
Provide arresters that are combination spark gap and metal oxide varistor type technology in a premolded rubber
elbow.
2.3.3 Intermediate
Provide single-phase, single-pole, self-supporting type arresters for pedestal, platform, or bracket mounting.
2.3.4 Station
Provide single-phase, single-pole, self-supporting type arresters for pedestal, platform, or bracket mounting.
2.4 SURGE PROTECTION FOR ROTATING AC MACHINES
Provide arresters installed on rotating alternating current equipment that are the type and rating as recommended
by the manufacturer of the equipment.
2.5 MOUNTING BRACKETS
Provide arresters that are equipped with suitable mounting brackets for the applicable method of mounting.
PART 3 EXECUTION
3.1 INSTALLATION
Install and connect arresters in accordance with the manufacturer's installation instructions.
Make ground connection to a driven ground rod, counterpoise, or station grounding system and meet the intent
of the National Electrical Code, NFPA 70.
Connect lightning arresters as close as practicable to the apparatus being protected. When connecting arresters
to overhead conductors, use a hot line clamp. Provide a hot line clamp that is designed to be compatible to
the type of conductor material being used, i.e. aluminum or copper.
3.1.1 Installation Instructions, Surge Arresters
Submit Manufacturer's instructions for surge arresters including special provisions required to install equipment
components and system packages. Provide special notices that detail impedances, hazards and safety precautions.
3.1.2 Installation Drawings
Submit installation drawings in accordance with paragraph entitled, "Installation," of this section.
3.2 ARRESTERS
3.2.1 Distribution Type
Install distribution class arresters on all overhead lines, riser poles, pad mounted transformers and where applicable
installed on distribution load break switches, sectionalizers and fault interrupters.
3.2.1.1 Distribution - Riser-Pole Class
Distribution - Install riser-pole class arrestors on all riser poles.
3.2.2 Intermediate Type
NOTE: Where additional protection is necessary, install intermediate class
arresters. Make the utilization of intermediate class arresters take into consideration
the increased size, weight and mounting constraints. Typical areas of consideration
are unit substations, primary switches and switching stations.
Install intermediate type arrestors on grounded support brackets/structures
suitable to adequately support the weight of the arrestor.
Install intermediate type arrestors on grounded support brackets/structures suitable to adequately support the
weight of the arrestor.
3.2.3 Station Type
NOTE: Where maximum protection is required utilize the station class arrester.
Use these arresters where switching surge durability is required. A typical
area of utilization is utility substations where the medium voltage distribution
system interfaces to the high voltage commercial power provider. Make utilization
of station class arresters take into consideration the increased size, weight
and mounting constraints.
Install station type arrestors on grounded structures suitable to adequately support the weight of the arrestor.