Download Section [26 35 33.13] [16282]

Square D by Schneider Electric
LOW VOLTAGE ANTI-RESONANT AUTOMATIC CAPACITOR BANKS
THIS GUIDE SPECIFICATION IS WRITTEN IN ACCORDANCE WITH THE CONSTRUCTION SPECIFICATIONS INSTITUTE (CSI)
MASTERFORMAT. THIS SECTION MUST BE CAREFULLY REVIEWED AND EDITED BY THE ARCHITECT OR THE ENGINEER
TO MEET THE REQUIREMENTS OF THE PROJECT. COORDINATE THIS SECTION WITH OTHER SPECIFICATION SECTIONS
IN THE PROJECT MANUAL AND WITH THE DRAWINGS.
WHERE REFERENCE IS MADE THROUGHOUT THIS SECTION TO “PROVIDE”, “INSTALL”, “SUBMIT”, ETC., IT SHALL MEAN
THAT THE CONTRACTOR, SUBCONTRACTOR, OR CONTRACTOR OF LOWER TIER SHALL “PROVIDE”, “INSTALL”, “SUBMIT”,
ETC., UNLESS OTHERWISE INDICATED.
THIS SECTION IS WRITTEN TO INCLUDE THE 2004 MASTERFORMAT AND THE 1995 MASTERFORMAT VERSIONS. WHERE
APPLICABLE, THESE ITEMS ARE BRACKETED AND, IN EACH CASE, UNLESS OTHERWISE INDICATED, THE FIRST CHOICE
APPLIES TO THE 2004 MASTERFORMAT AND THE SECOND CHOICE APPLIES TO THE 1995 MASTERFORMAT.
NOTES TO USERS OF THIS SPECIFICATION:
1
NORMAL STEP SIZES UTILIZED AT VARIOUS VOLTAGES ARE LISTED BELOW:
a. FOR 208 VOLT SYSTEMS: 20 kVAR AND 40 kVAR.
b. FOR 480 VOLT SYSTEMS: 50 kVAR AND 100 kVAR.
c. FOR 600 VOLT SYSTEMS: 50 kVAR AND 100 kVAR.
d. OTHER VOLTAGE AND STEP SIZES ARE AVAILABLE.
NOTE THAT HAVING ONE SMALLER STEP IN A SYSTEM PROVIDES STEP RESOLUTION IN ACCORDANCE WITH THAT
SMALLER STEP. FOR INSTANCE, A 250 kVAR SYSTEM CAN BE CONSTRUCTED USING ONE 50 kVAR STEP AND TWO
100 kVAR STEPS BUT STEP SWITCHING RESOLUTION WILL BE 50:100:150:200:250. STEP SIZES IN ANY SYSTEM MUST BE
DESIGNED AS INTEGER MULTIPLES OF THE FIRST STEP TO ACCOMMODATE CONTROLLER PROGRAMMING. THE
EXAMPLE ABOVE HAS A 1:2:2 RATIO. STEPS SMALLER THAN THOSE LISTED ABOVE ARE POSSIBLE BUT NOT TYPICALLY
ECONOMICAL NOR NECESSARY TO MEET POWER FACTOR REQUIREMENTS IN NORTH AMERICA.
2.
NORMAL TUNING OF DETUNED SYSTEMS IS 4.2 X 60 HERTZ FOR NORTH AMERICAN VOLTAGES (480 VOLTS,
600 VOLTS). FILTER TUNING OF 3.8 X 50 HERTZ IS COMMON FOR 380 VOLT AND 415 VOLT SYSTEMS. WE DO NOT
RECOMMEND SPECIFYING HIGER TUNING POINTS WITHOUT A DETAILED NETWORK STUDY AS THE RISK OF FILTER
OVERLOAD INCREASES WITH INCREASING THE TUNING POINT.
CURRENT TRANSFORMER (CT) RATIOS COMMONLY AVAILABLE INCLUDE THE FOLLOWING: 500/5, 800/5, 1000/5,
1200/5, 1600/5, 2000/5, 2500/5, 3000/5, 4000/5, AND 5000/5. CT RATIO IS DETERMINED BY THE CURRENT RATING OF
THE UPSTREAM SWITCHGEAR TO WHICH THE CAPACITOR BANK IS CONNECTED. FOR INSTANCE, A CAPACITOR
BANK CONNECTED TO A 2000 AMPERE RATED SWITCHBOARD WOULD REQUIRE A 2000/5A CURRENT
TRANSFORMER. CT SIZING IS NOT A FUNCTION OF THE SIZE OF THE CAPACITOR BANK OR THE FEEDER BREAKER
TO THE CAPACITOR BANK. NORMAL SPLIT CORE CT’S HAVE A 4 INCH (102 MM) BY 7 INCH (178 MM) WINDOW WHICH
IS TYPICALLY SUITABLE FOR SWITCHGEAR CURRENT RATING UP TO 4000 AMPERES; 4 INCH (102 MM) BY11 INCH
(279 MM) WINDOW CT’S ARE ALSO AVAILABLE FOR HIGHER CURRENT RATING SWITCHGEAR.
3
SECTION [26 35 33.13] [16282]
LOW VOLTAGE ANTI-RESONANT AUTOMATIC CAPACITOR BANKS
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General Conditions,
[Division 01 - GENERAL REQUIREMENTS] [Division 1 - GENERAL REQUIREMENTS], and other
applicable specification sections in the Project Manual apply to the work specified in this Section.
SUMMARY
Scope: Provide design and engineering, labor, material, equipment, related services, and
supervision required, including, but not limited to, manufacturing, fabrication, erection, and
installation for low voltage anti-resonant automatic capacitor banks as required for the complete
performance of the work, and as shown on the Drawings and as herein specified.
Section [26 35 33.13] [16282]
Low Voltage Anti-Resonant Automatic Capacitor Banks
01/24/12 - 1
B.
1.3
Section Includes: The work specified in this Section includes, but shall not be limited to, low
voltage anti-resonant automatic capacitor banks as specified herein and as indicated or scheduled
on the Drawings.
REFERENCES
A.
General: The publications listed below form a part of this Specification to the extent referenced. The
publications are referred to in the text by the basic designation only. The edition/revision of the
referenced publications shall be the latest date as of the date of the Contract Documents, unless
otherwise specified.
B.
American National Standards Institute (ANSI):
1. ANSI C37.51, "Switchgear - Metal-Enclosed Low Voltage AC Power Circuit Breaker Switchgear
Assemblies - Conformance Test Procedures."
C.
ASTM (ASTM):
1. ASTM E 329, "Standard Specification for Agencies Engaged in the Testing and/or Inspection of
Materials Used in Construction."
D.
Canadian Standards Association (CSA):
1. CSA C.22.2 No. 190, “Capacitors for Power Factor Correction.”
E.
National Electrical Manufacturers Association (NEMA):
1. NEMA 250, "Enclosures for Electrical Equipment (1000 Volts Maximum)" (copyrighted by
NEMA, ANSI approved).
F.
National Fire Protection Association (NFPA):
1. NFPA 70, "National Electrical Code" (copyrighted by NFPA, ANSI approved) - hereinafter
referred to as NEC.
2. NFPA 70E, "Standard for Electrical Safety Requirements for Employee Workplaces"
(copyrighted by NFPA, ANSI approved).
G.
Underwriters Laboratories, Inc. (UL):
1. UL 508, "Standard for Industrial Control Equipment" (copyrighted by UL, ANSI approved).
2. UL 810, "Standard for Capacitors."
H.
Institution of Electronic and Electrical Engineers (IEEE)
1. IEEE 18, “Standard for Shunt Power Capacitors”
2. IEEE Std 1531, “IEEE Guide for Application and Specification of Harmonic Filters”
1.4
SYSTEM DESCRIPTION
A.
General: The complete equipment shall be manufactured per UL 508, and CSA 22.2 No. 190.
B.
Performance Requirements:
1. General: Capacitor bank shall be able to select a target power factor, adjustable to any value
between 0.80 lagging and unity. When the power factor differs from the target setting for more
than 10 to 30 seconds, capacitor bank shall bring the corrected circuit power factor to the
closest target setting.
2. Service Conditions: Capacitor equipment shall be suitable for the following conditions:
a. Operating ambient temperature range shall be 23 °F (-5 °C) to 104 °F (40 °C) maximum.
b. Highest mean over any period of 24 hours shall be 104 °F (40 °C).
c. Highest mean over one year shall be 95 °F (35 °C).
3. Maximum Altitude: 6000 feet (1829 m).
4. Humidity: 0 percent to 95 percent, non-condensing.
Section [26 35 33.13] [16282]
Low Voltage Anti-Resonant Automatic Capacitor Banks
01/24/12 - 2
1.5
SUBMITTALS
A.
General: See [Section 01 33 00 - SUBMITTAL PROCEDURES] [Section 01300 - SUBMITTALS].
B.
Product Data: Submit product data showing material proposed. Submit sufficient information to
determine compliance with the Drawings and Specifications.
C.
Shop Drawings: Submit shop drawings for each product and accessory required. Include
information not fully detailed in manufacturer’s standard product data.
D.
Wiring Diagrams: Submit wiring diagrams detailing power, signal, and control systems, clearly
differentiating between manufacturer-installed wiring and field-installed wiring, and between
components provided by the manufacturer and those provided by others.
1.6
QUALITY ASSURANCE
A.
Qualifications:
1. Manufacturer Qualifications: Manufacturer shall be a firm engaged in the manufacture of low
voltage anti-resonant automatic capacitor banks of types and sizes required, and whose
products have been in satisfactory use in similar service for a minimum of 20 years.
2. Installer Qualifications: Installer shall be a firm that shall have a minimum of five years of
successful installation experience with projects utilizing low voltage anti-resonant automatic
capacitor banks similar in type and scope to that required for this Project.
3. Inspecting and Testing Agency Qualifications: To qualify for acceptance, an independent
inspecting and testing agency hired by the Contractor or manufacturer to test products shall
demonstrate to the Architect/Engineer’s satisfaction that they are qualified according to
ASTM E 329 to conduct testing indicated.
B.
Regulatory Requirements: Comply with applicable requirements of the laws, codes, ordinances,
and regulations of Federal, State, and local authorities having jurisdiction. Obtain necessary
approvals from such authorities.
C.
Electrical Components, Devices, and Accessories: Electrical components, devices, and
accessories shall be listed and labeled as defined in NEC, Article 100, by an inspecting and testing
agency acceptable to authorities having jurisdiction, and marked for intended use.
D.
Pre-Installation Conference: Conduct pre-installation conference in accordance with
[Section 01 31 19 - PROJECT MEETINGS] [Section 01200 - PROJECT MEETINGS]. Prior to
commencing the installation, meet at the Project site to review the material selections, installation
procedures, and coordination with other trades. Pre-installation conference shall include, but shall
not be limited to, the Contractor, the Installer, and any trade that requires coordination with the work.
Date and time of the pre-installation conference shall be acceptable to the Owner and the
Architect/Engineer.
1.7
DELIVERY, STORAGE, AND HANDLING
A.
Deliver materials to the Project site in supplier’s or manufacturer’s original wrappings and containers,
labeled with supplier’s or manufacturer’s name, material or product brand name, and lot number, if
any.
B.
Store materials in their original, undamaged packages and containers, inside a well-ventilated area
protected from weather, moisture, soiling, extreme temperatures, and humidity.
1.8
A.
PROJECT CONDITIONS
Environmental Requirements: Do not install low voltage anti-resonant automatic capacitor banks
until space is enclosed and weatherproof, wet work in space is completed and nominally dry, work
Section [26 35 33.13] [16282]
Low Voltage Anti-Resonant Automatic Capacitor Banks
01/24/12 - 3
above ceilings is complete, and ambient temperature and humidity conditions are and will be
continuously maintained at values near those indicated for final occupancy.
1.9
WARRANTY
A.
General: See [Section 01 77 00 - CLOSEOUT PROCEDURES] [Section 01770 - CLOSEOUT
PROCEDURES].
B.
Additional Owner Rights: The warranty shall not deprive the Owner of other rights the Owner may
have under other provisions of the Contract Documents and shall be in addition to and run
concurrent with other warranties made by the Contractor under requirements of the Contract
Documents.
PART 2 - PRODUCTS
2.1
A.
2.2
A.
MANUFACTURERS
Basis of Design: Products specified shall be manufactured by Square D by Schneider Electric.
Items specified are to establish a standard of quality for design, function, materials, and appearance.
Equivalent products by other manufacturers are acceptable. The Architect/Engineer will be the sole
judge of the basis of what is equivalent.
EQUIPMENT SIZE/RATINGS
Operating voltage shall be [208 volts] [240 volts] [380 volts] [400 volts] [ [415 volts] [480 volts]
[600 volts] (line-to-line), three-phase, [50 hertz] [60 hertz].
SELECT APPLICABLE VOLTAGE AND HERTZ ABOVE. SELECT APPLICABLE NETWORK BELOW.
B.
Rated capacitor cell voltage shall be minimum of [260 volts for 208 volt networks] [400 volts for
240 volt networks] [480 volts for 380/400/415 volt networks] [570 volts for 480 volt networks]
[690 volts for 600 volt networks] (line-to-line).
C.
Total kVAR size shall be [_____] kVAR at operating voltage.
INSERT kVAR ABOVE. SELECT APPLICABLE NETWORK BELOW AND INSERT APPLICABLE kVAR VALUES.
D.
Capacitor steps shall be [[_____] kVAR or [_____] kVAR each for 208 volt networks] [[_____] kVAR
or [_____] kVAR each for 240 volt networks] [[_____] kVAR or [_____] kVAR each for 480 volt
networks] [[_____] kVAR or [_____] kVAR each for 600 volt networks].
E.
[Main terminal lugs] shall be copper and all copper buswork shall be braced to withstand fault level at
either 42 kA, 50 kA, or 65 kA RMS amperes symmetrical plus 10 percent for four cycles per
ANSI C37.51.
RETAIN OR REVISE “MAIN TERMINAL LUGS” ABOVE AND/OR “MAIN CIRCUIT BREAKER” BELOW..
F.
[Main circuit breaker] shall withstand fault level of 125 kA at 240 volts, 100 kA at 480 volts, and 65 kA
at 600 volts RMS amperes symmetrical where applicable.
RETAIN PARAGRAPH BELOW IF APPLICABLE TO THE PROJECT.
G.
Main circuit breaker shall be rated for a minimum of 135 percent of the capacitor system full load
current at operating voltage.
Section [26 35 33.13] [16282]
Low Voltage Anti-Resonant Automatic Capacitor Banks
01/24/12 - 4
2.3
CAPACITORS
A.
Internal capacitor cells shall be UL and CSA recognized in compliance with UL 810 and CSA22.2,
No. 190.
B.
Liquid-filled or impregnated capacitors are not acceptable. Individual capacitor elements shall be of
a self-healing design utilizing a low loss metalized film dielectric system with a pressure-sensitive
circuit interrupter. Electrical losses, including, but not limited to, contribution of discharge resistors,
shall average less than 0.5 watts per kVAR.
C.
Capacitor shall be rated for 130 percent continuous overcurrent, and 110 percent continuous
overvoltage at rated voltage (8 hours over a 24 hour period).
D.
Capacitor elements shall be Delta connected at rated voltage. Wye connected capacitor elements
shall not be acceptable.
E.
Discharge resistors shall be provided to meet UL/CSA requirement (reduce voltage on the cells to
50 volts or less within one minute after the capacitor has been switched off).
2.4
A.
POWER FACTOR CORRECTION UNITS
Enclosure:
SELECT COLOR BELOW.
1.
2.
3.
Enclosure(s) shall be freestanding, and frame shall be constructed of minimum 12 gage
(0.1046 inch [2.66 mm]) steel, including, but not limited to a hinged door, ground lug, and
removable lifting eyes, finished with standard [ANSI/ASA 49 gray] [ANSI/ASA 61 gray]
[_________] paint.
Enclosure(s) shall meet NEMA 250 Type 1 for indoor application.
Enclosure door(s) shall be full height, key lockable with door mounted controller, to comply with
NFPA70E requirements.
B.
Individual Capacitor Stage:
1. Each capacitor/inductor stage shall consist of hermetically sealed three-phase capacitor cell(s)
on a modular assembly with the contactor, three-phase thermal magnetic molded case current
limiting breaker.
2. Each module shall be designed to facilitate maintenance if replacement should ever become
necessary.
C.
Internal Overcurrent Protective Device: Thermal magnetic molded case current limiting circuit
breaker shall be provided on the line side of each contactor. Circuit breaker shall be UL/CSA listed,
shall have inverse time-current element for low level overloads, and shall have adequate short circuit
current interrupting rating.
D.
Contactors: Contactors shall be three pole; rated for the repetitive high inrush switching duty in the
capacitor application. Contactors shall be designed for capacitor switching duty, UL/CSA listed and
rated 600 volts AC with 120 volts AC operating coils.
E.
Tuning Reactors:
SELECT APPLICABLE VALUE AND HERTZ BELOW.
1.
2.
Tuning reactors for each capacitive stage shall be selected such that filter tuning of each stage
shall be equal to [3.8] [4.0] [4.2] [4.4] [4.7] [_____] by [50 hertz] [60 hertz].
Reactor shall be constructed of EI laminated low hysteresis core with a controlled air gap and
three copper windings of rectangular cross section glass insulated copper conductor.
Section [26 35 33.13] [16282]
Low Voltage Anti-Resonant Automatic Capacitor Banks
01/24/12 - 5
3.
4.
Reactor assembly shall be impregnated with high temperature thermosetting material. Reactor
insulation shall be rated for 239 °F (115 °C) rise over a 104 °F (40 °C) ambient.
Center leg of tuning reactor shall have an embedded thermistor wired to a thermistor relay for
the stage to deenergize the associated contactor in the event of reactor overheating.
F.
Control Power Requirements:
1. 120 volt AC control circuit transformer shall be provided within the enclosure.
2. Major components, including, but not limited to, both primary and secondary winding of the
transformer, shall be fused.
3. The control circuit shall be protected by a resettable Class A ground fault protection breaker.
G.
Power Factor Controller:
1. The standard controller shall be a programmable unit with a single current input and single
line-to-line voltage input. The controller shall measure power factor in the distribution system,
and according to programmed control logic, shall connect or disconnect the required amount of
capacitor stages needed to maintain the preset power factor.
2. The controller shall utilize a switching logic that shall optimize the use of capacitor elements and
contactors in the bank.
3. A backlit display for direct viewing of power factor and alarms shall be provided. Indication of
stage energization and inductive/capacitive condition shall be provided.
4. Backlit display shall light up when unit is energized.
5. Maintenance mode (for maintenance override of auto mode, five minutes maximum override
time) shall be provided.
6. A common alarm dry contact shall be provided to signal internal cubical overtemperature
(factory set at 122 °F [50 °C] maximum).
7. A common alarm dry contact shall be provided to signal high harmonic voltage distortion limit
(THD (V) >7 percent).
8. The controller shall automatically select the system frequency (50 hertz or 60 hertz).
9. C/K ratio and reversed CT polarity shall be adjustable by the controller.
10. The controller shall permit programming of the switching stage response time, number of
stages (12 maximum), and various stepping programs depending on system design.
IN SUBPARAGRAPH BELOW, SELECT WHETHER OR NOT DEVICE IS OPTIONAL.
11. [A NRC12] [An optional NRC12] power factor controller shall provide alarms and indications,
including, but not limited to, the following:
a. Low power factor.
b. Hunting.
c. Abnormal power factor.
d. Undervoltage.
e. Overvoltage.
f. Overcurrent.
g. Overcompensation.
h. Wrong frequency.
i. Capacitor overload.
j. Capacitor output low.
H.
External Current Transformer (CT):
IN SUBPARAGRAPH BELOW, SELECT WHETHER OR NOT DEVICE IS OPTIONAL AND INSERT AMPERES.
1.
2.
[A single] [An optional single] current transformer to be installed upstream of where the
automatic capacitor is attached to the electrical distribution system, shall be provided with a
ratio of [____] amperes to 5 amperes. The field installable CT shall be split core type with an
opening large enough to facilitate installation on the cable or buss.
A shorting terminal shall be provided for two incoming current transformer wires.
Section [26 35 33.13] [16282]
Low Voltage Anti-Resonant Automatic Capacitor Banks
01/24/12 - 6
2.5
A.
SOURCE QUALITY CONTROL
Standard tests shall be performed in the factory to confirm proper operation of the complete
equipment, including, but not limited to, operation of control circuits, functioning of the controller, full
voltage and current stage testing, confirming of kVAR power rating, and high pot testing per UL/CSA
requirements.
PART 3 - EXECUTION
3.1
A.
3.2
A.
3.3
A.
EXAMINATION
Verification of Conditions: Examine areas and conditions under which the work is to be installed,
and notify the Contractor in writing, with a copy to the Owner and the Architect/Engineer, of any
conditions detrimental to the proper and timely completion of the work. Do not proceed with the work
until unsatisfactory conditions have been corrected.
1. Beginning of the work shall indicate acceptance of the areas and conditions as satisfactory by
the Installer.
INSTALLATION
Preparation and installation shall be in accordance with reviewed product data, final shop drawings,
manufacturer’s written recommendations, and as indicated on the Drawings.
1. Install low voltage anti-resonant automatic capacitor banks in accordance with the NEC and
applicable local codes.
FIELD QUALITY CONTROL
See [Section 01 45 23 - INSPECTING AND TESTING SERVICES] [Section 01410 - INSPECTING
AND TESTING SERVICES].
SELECT WHO DOES THE INSPECTING AND TESTING BELOW.
B.
Field inspection and testing shall be performed by certified technician from [the Owner] [the
Contractor] [the manufacturer].
C.
Perform start-up tests in accordance with manufacturer's instruction manual.
D.
Document equipment nameplate and test data on the test report.
3.4
A.
PROTECTION
Provide final protection and maintain conditions in a manner acceptable to the Installer, that shall
ensure that the low voltage anti-resonant automatic capacitor banks shall be without damage at time
of Substantial Completion.
END OF SECTION
Section [26 35 33.13] [16282]
Low Voltage Anti-Resonant Automatic Capacitor Banks
01/24/12 - 7