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Transcript
SECTION 263533
AUTOMATIC LOW-VOLTAGE POWER FACTOR CORRECTION CAPACITORS WITH AND
WITHOUT REACTORS
PART 1 – GENERAL
1.01
A.
1.02
A.
1.03
RELATED DOCUMENTS
Division-26 Basic Electrical Materials and Methods sections apply to the work of this
section.
SUMMARY
Section provides for automatic low-voltage (600V or less) power factor correction
capacitor systems (with or without Reactors)
REFERENCE STANDARDS
A.
ANSI/IEEE 18 – Standard for Shunt Power Capacitors; 2013
B.
NEMA CP 1 – Shunt Capacitors; National Electrical Manufacturers Association; 2000
(R2008)
C.
UL 810 – Capacitors; Current Edition, Including All Revisions
D.
NEC Compliance – Comply with NEC as applicable to location and installation of
power factor correction capacitor systems and associated equipment
E.
IEEE 519 Std – 2014 (for capacitor systems with reactors)
1.04
COORDINATION
A.
Coordinate the work with other trades to avoid placement of ductwork, piping,
equipment, or other potential obstructions within the dedicated equipment spaces
and working clearances required by NFPA 70.
B.
Coordinate arrangement of electrical equipment with the dimensions and clearance
requirements of the actual equipment to be installed.
C.
Coordinate the work with placement of supports, anchors, etc. required for mounting.
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D.
1.05
Notify Architect of any conflicts with or deviations from the contract documents.
Obtain direction before proceeding with work.
SUBMITTALS
A.
Product Data: Provide manufacturer’s standard catalog pages and data sheets for
capacitor assemblies, including ratings, configurations, materials, fabrication details,
dimensions, finishes, weights, and service condition requirements.
B.
Motor Overload Protective Device Calculations: Where capacitors are to be connected
on the load side of motor overload protective devices (when permitted), indicate
overload device ratings adjusted for reduced current.
C.
Specimen Warranty: Submit a sample of manufacturer’s warranty.
D.
Manufacturer’s Installation Instructions
E.
Operation and Maintenance Data
1.06
QUALITY ASSURANCE
A.
Manufacturer Qualifications: Company specializing in manufacturing the products
specified in this section with a minimum three years documented experience.
B.
Installer Qualifications: Company specializing in performing the work of this section
with a minimum of five years documented experience with power factor correction
systems of similar size, type, and capacity.
C.
Electrical Components, Devices, and Accessories: Listed and labeled as defined in
NFPA 70, Article 100, by a testing agency acceptable to authorities having
jurisdiction, and marked for intended use.
D.
Comply with IEEE 18 and NEMA CP 1.
E.
Comply with NFPA 70.
1.07
WARRANTY
A.
Capacitor Systems: Provide minimum two year manufacturer warranty covering repair
or replacement due to defective materials or workmanship.
B.
Capacitor Cells: Provide minimum two year manufacturer warranty covering repair or
replacement due to defective materials or workmanship.
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Low-Voltage Power Factor
Correction Capacitors
1.08
A.
DELIVERY, STORAGE AND HANDLING
Pack and crate capacitor systems as required to permit ease of handling and to
provide protection from damage during shipping, handling and storage.
PART 2 – PRODUCTS
2.01
A.
2.02
MANUFACTURERS
Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
1.
Myron Zucker, Inc.
2.
Or Approved Equal
GENERAL – CAPACITORS
A.
UL and cUL listed or recognized.
B.
Capacitor Cell Construction: Self-healing, metalized polypropylene film; dry (resinencapsulated) or liquid-impregnated with non-PCB, non-toxic, biodegradable dielectric
fluid; provide three-phase cells (configurations utilizing factory-wide single phase
capacitors are not acceptable). Each cell shall be hermetically sealed in a tin-plated
steel container.
C.
Cell Rupture Protection: UL listed pressure-actuated circuit interrupter shall
disconnect all three phases at the same time to maintain a balanced circuit and
prevent capacitor cell case rupture.
D.
Discharge Resistors: Factory installed and wired three-phase delta connected external
discharge resistor network. The resistors shall be sized to reduce residual voltage to
less than 50 volts within one minute of de-energization.
E.
Operating Conditions:
1.
Ambient Operating Temperatures: Between -40°C and 55°C (-40°F and 131°F)
2.
Maximum Altitude: 1800 meters (6000 feet)
3.
Humidity: 0 to 95 percent, non-condensing
F.
Losses: Not greater than 0.5 W per kVAr.
G.
Capacitor cell shall be designed for a 20-year life continuous duty.
H.
Individual capacitor cells shall be covered by a two-year warranty.
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Low-Voltage Power Factor
Correction Capacitors
2.03
AUTOMATIC POWER FACTOR CORRECTION CAPACITOR SYSTEMS
A.
Manufactured systems consist of capacitor cells, enclosures, and associated
components specifically designed for three-phase power factor correction
applications. Comply with IEEE and NEMA CP 1, and list and label as complying with
UL 508A or UL 810 as applicable. Factory wired, ready for field connection to
external circuits at a single set of terminals. Capacitor system shall not contain any
fillers (such as Vermiculite) so that all capacitor cells can be accessed for visual
inspection.
B.
Provide complete power factor correction capacitor system consisting of all required
equipment, conduit, boxes, wiring, supports, accessories, system programming, etc.,
as necessary for a complete operating system that provides power factor correction
as indicated.
C.
Description: Automatic Capacitor systems that supply a variable amount of reactive
power (kVAr) in discrete kVAr steps by switching capacitor cell groups using
contactors and microprocessor-based controllers as required to maintain a target
power factor.
1.
Service entrance automatic power factor correction system:
a.
Total System Power Factor: Achieve corrected total system power factor
of ___.
1)
Voltage/frequency as indicated on drawings
2)
Capacitance: ____ kVAr
3)
Steps: Not greater than _____kVAr each
b.
VAR Controller features: confirm
1)
HMI key pad with back lit LCD display indicating all relevant PQ
parameters
2)
Quick CT programming function with automatic CT orientation
recognition
3)
Balanced used of steps and step count recording
4)
Capacitor overload protection and step failure indication
5)
10 standard system alarms with 11 optional additional alarms
6)
Internal panel temperature sensor for over temperature
7)
Communication interfaces of various protocols (OPTIONAL)
(Autocapacibank™ ACIM Model)
2.
c.
Provide integral circuit breaker/disconnect (OPTIONAL)
Service entrance automatic power factor correction system with Reactors – for
use in harmonic-rich environments:
a.
Total System Power Factor: Achieve corrected total system power factor
of __.
1)
Voltage/frequency as indicated on drawings
2)
Capacitance: ____ kVAr
3)
Steps: Not greater than _____kVAr each
b.
System shall be tuned to the ____ harmonic (____Hz).
c.
VAR Controller features:
1)
HMI key pad with back lit LCD display indicating all relevant PQ
parameters
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2)
3)
4)
5)
6)
7)
d.
Quick CT programming function with automatic CT orientation
recognition
Balanced used of steps and step count recording
Capacitor overload protection and step failure indication
10 standard system alarms with 11 optional additional alarms
Internal panel temperature sensor for over temperature
Communication interfaces of various protocols (OPTIONAL)
(Autocapacitrap™ ACIM Model)
Provide integral circuit breaker/disconnect (OPTIONAL)
D.
Performance requirements: Controller permits selection of target power factor,
adjustable to any value between 0.80 lagging and unity. Controller continuously
monitors the power factor on circuits being corrected. Contactors open or close as
required to bring the corrected circuit power factor closer to the target setting.
E.
Fuses:
1.
Current-limiting, fast-acting with 200,000 ampere interrupting capacity.
2.
Provide industry standard brand fuses that are completely accessible and
replaceable. Inaccessible fuse links are not acceptable.
3.
Provide fusing for all three phases. Two-line fusing is not acceptable.
F.
Short Circuit Current Rating: Provide capacitor systems with listed short circuit
current rating not less than the available fault current at the installed locations as
indicated on the drawings.
G.
Contactors: Suitable for high inrush currents associated with capacitor switching.
Comply with UL508 and IEC60947-4-1.
H.
Enclosures:
1.
Provide steel enclosures with ground lug and without knockouts.
2.
Environment Type per NEMA 250: Unless otherwise indicated, as specified for
the following installation locations:
3.
Indoor Clean, Dry Locations: Type 1 or Type 12.
4.
Outdoor Locations: Type 3R or Type 4.
5.
Hinged Doors: Lockable, with all locks keyed alike.
6.
Provide lifting eyes for free-standing enclosure types; provide built-in mounting
brackets for wall or shelf-mounting enclosure types.
7.
Finish: Manufacturer’s standard unless otherwise indicated.
I.
Capacitor systems with Reactors:
1.
Furnished with three-phase iron core reactors and harmonic-duty capacitor
cells, specifically designed for power factor correction in harmonic
environments.
2.
Furnish Class H (180°C), 600 Volt insulation.
3.
Hi-pot testing required on all reactors.
4.
System tuning: Tuned below the 5th harmonic unless otherwise indicated.
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5.
Furnish reactors with an integral thermistor wired to a relay for an overtemperature light indication.
J.
Provide current transformers (CTs) with appropriate ratio, type and configuration as
required for system measurement.
K.
VAR
1.
2.
3.
4.
5.
6.
L.
Status Indications:
1.
Power factor.
2.
Voltage.
3.
Current.
4.
Real power (kW).
5.
Reactive power (kVAr).
6.
Apparent power (kVA).
7.
Frequency.
8.
Number of energized steps.
9.
Step reconnection delay.
10. Voltage total harmonic distortion.
11. _______________________.
M.
Alarm indications:
1.
Blown fuse, visible from exterior of enclosure.
2.
Over compensation.
3.
Under compensation.
4.
Overcurrent.
5.
Undercurrent.
6.
Undervoltage.
7.
Overvoltage.
8.
Capacitor overload.
9.
No voltage release.
10. Step failure.
11. High voltage total harmonic distortion (THD) (OPTIONAL).
12. ________________________.
N.
All output contacts shall be disabled within 8 milliseconds of main power interruption.
The controller shall retain its programming after the restoration of supply voltage.
The controller shall bring the capacitor bank back on line in a step, phased, normal
sequence.
O.
Options:
Controller: Solid-state, microprocessor-based controls, including the following:
Built-in power factor meter.
Manual and automatic modes.
Step and power factor display.
Adjustable target power factor with range of 0.80 inductive to unity.
Adjustable step time delay.
______________________.
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Low-Voltage Power Factor
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1.
2.
3.
4.
2.04
A.
Integral circuit breaker or disconnect where indicated or required – 50kAIC or
65kAIC
Capacitor system may be expandable to accommodate future capacitance and /
or reactors
Integral surge protective device
Remote monitoring capability via PC
SOURCE QUALITY CONTROL
Factory test power factor correction equipment before shipment. Comply with NEMA
CP 1. Include the following production tests on each system:
1.
Short-time overvoltage test
2.
Capacitance test
3.
Loss determination test
4.
Discharge resistor test
5.
Leak test
6.
Functional test of all operations, controls, indicators, sensors, and protective
devices
PART 3 – EXECUTION
3.01
INSTALLATION
A.
Install capacitor systems in accordance with manufacturer’s written instructions.
B.
Provide required supports, mounting pads, and attachments.
C.
Arrange equipment to provide minimum clearances and required maintenance access.
D.
Automatic Capacitor Systems:
1.
Locate current transformers (CTs) on line side of capacitor connection so that
measurements include power factor correction.
2.
Power factor controller will be pre-programmed to maintain desired power
factor
E.
Remove capacitor fuses prior to bumping motors for testing purposes to prevent
blowing fuses caused by energizing capacitor that has not yet discharged.
3.02
FIELD QUALITY CONTROL
A.
Perform tests and inspections: Test system functions, operations, and protective
features according to manufacturer’s written instructions.
B.
Prepare and start system in accordance with manufacturer’s instructions.
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Low-Voltage Power Factor
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3.03
A.
3.04
A.
STARTUP SERVICE
Optional: Supervision of energizing power factor correction capacitor systems as well
as performance tests as determined by the manufacturer shall be performed.
DEMONSTRATION
Training: Train Owner’s personnel on operation, adjustment, and maintenance of
automatic capacitor systems.
1.
Use operation and maintenance manual as training reference, supplemented
with additional training materials as required.
2.
Provide minimum two hours of training.
3.
Instructor: Manufacturer’s authorized representative.
4.
Location: At project site.
END OF SECTION 263533
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Low-Voltage Power Factor
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