POWER FACTOR CORRECTION CAPACITORS
PART 1-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract apply to this Section.
1.02 SUMMARY
A. This Section includes automatic power factor correction equipment rated
600V and less.
B. Related Sections include the following:
1. Division 16 Section "Basic Electrical Materials and Methods".
2. Connection to BMS system, including interface elements detailed in
BMS schedules and/or shown on the drawings.
1.03 SUBMITTALS
A. Product Data: For each type of product indicated include dimensions shipping,
installed, and operating weights of multiple capacitor cells or elements and
data on features, ratings and performance.
B. Shop Drawings: Detail equipment assemblies and indicate dimensions,
weights, method of field assembly, components, and location and size of each
field connection. Show access and workspace requirements and required
clearances.
1. Wiring Diagrams: Detail internal and interconnecting wiring and
differentiate between manufacturer-installed and field-installed
wiring.
C. Factory Test Reports: Evidence of product's compliance with specified
requirements.
D. Field Test Reports: Indicate and interpret test results for compliance with
performance requirements.
E. Maintenance Data: For equipment to include in maintenance manuals as well
as the following:
1. Lists of spare parts and replacement components recommended for
storage at Project site.
2. Detailed instructions covering operation under both normal and
abnormal conditions.
1.04 QUALITY ASSURANCE
A. Comply with IEEE 18, IEC 60070A and NEMA CP 1.
2
1.05 EXTRA MATERIALS
A. Furnish extra materials described below that match products installed and that
are packaged with protective covering for storage and identified with labels
describing contents. Deliver extra materials to Employer.
1. Fuses: For every 12 Provide at least (3) of each type and rating.
PART 2-PRODUCTS
2.01 MANUFACTURERS
A. Approved Manufacturers: Subject to compliance with requirements under this
section.
2.02 CAPACITORS
A. Construction: Multiple capacitor cells or elements, factory wired in threephase
groups and mounted in metal enclosures.
B. Capacitor Cells: Dry, metallized-dielectric, self-healing type. Each cell shall
be encapsulated in thermosetting resin inside plastic container.
C. Cell Rupture Protection: Pressure-sensitive circuit interrupter for each cell.
D. Capacitor-Bank Fuses: Current limiting, non-interchangeable type; factory
installed in each phase and located within the equipment enclosure. Features
include the following:
1. Interrupting Capacity: 200,000 A minimum.
2. Fuse Ratings and Characteristics: As recommended by capacitor
manufacturer.
3. Neon Indicator Lamp for Each Fuse: Connect to illuminate when fuse
has opened, but is still in place, and locate so it is visible from outside
the enclosure.
E. Discharge Resistors: Factory installed and wired.
F. Enclosure: NEMA 250, steel or aluminum, arranged to contain the fluid
leakage from capacitor cells; factory equipped with mounting brackets suitable
for type of mounting indicated.
1. Indoor Enclosures: NEMA 250, Type 12 or as indicated.
2.03 FIXED CAPACITORS
A. Description: Integrally fused, unless otherwise indicated.
B. Internal Wiring: Factory wired, ready for field connection to external circuits
at a single set of pressure terminals.
2.04 AUTOMATIC POWER FACTOR CORRECTION UNITS
A. Comply with NEMA ICS 2.
B. Description: Capacitor banks, contactors, controls, and accessories factory
installed in independent enclosures. Units include a separately mounted
3
current transformer to sense current in the power circuit being corrected and to
provide input to unit controls.
C. Performance Requirements: Controls permit selection of a target power factor,
adjustable to any value between unity and 0.80 lagging. Controls continuously
sense the power factor on circuits being corrected and, when the power factor
differs from the target setting for more than 10 seconds, operate a contractor to
switch a capacitor bank into or out of the circuit. Contactors are opened or
closed as required to bring the corrected circuit power factor closer to the
target setting Switch only one capacitor bank at a time.
D. Controls: Solid-state, microprocessor-based controls, including the following:
1. Under voltage relay that interrupts capacitor switching and disconnects
capacitors for power supply interruptions longer than 15 minutes.
2. “Advance" and "Retard" push buttons on the control panel to permit
manually controlled capacitor-bank switching.
E. Contactors: three pole; rated for the repetitive high-inrush-switching duty in
the capacitor application.
F. Buses: Plated copper.
G. Fuses for Protection of Capacitor Banks: Rated to protect contactor,
interconnecting wiring, and capacitors.
H. Inductors: Air-core-type, connected in capacitor circuits; rated to limit
switching surges to within contactor ratings.
I. Mechanical Bracing for Current-Carrying Parts: Adequate to withstand the
maximum fault current to which they may be exposed.
J. Identification of Energized Capacitor Banks: LED indicating lamps on front
panel.
K. Enclosure Access: Hinged door with hand-operated catch. Door is interlocked
with controls or main circuit breaker to de-energize capacitors when door is
opened.
L. Local Display: LED or liquid-crystal digital type, mounted in door of
enclosure.
1. Indicated target and actual power factors.
2. Accuracy: -/+ 1%.
3. Mounting: Flush or semi flush in unit door.
M. Current Transformer: Type, configuration, and ratio to suit sensing and
mounting conditions.
N. Main Circuit Breaker: Operable from outside the enclosure to disconnect the
unit.
1.Operating handle can be padlocked.
O. Power factor capacitor units shall be disconnected in case of generator
operation.
4
2.05 FACTORY FINISH
A. Manufacturer’s standard enamel over corrosion-resistant treatment or primer
coat.
2.06 SOURCE QUALITY CONTROL
A. Factory test power factor correction equipment before shipment. Comply with
NEMA CP 1. Include the following:
1. Routine capacitor production tests, including short-time overvoltage,
capacitance, leak, and dissipation- factor tests.
2. Functional test of all operations, controls, indicators, sensors, and
protective devices.
PART 3-EXECUTION
3.01 INSTALLATION
A. Install freestanding equipment on cable trenches.
B. Maintain minimum workspace according to manufacturer's written
instructions.
3.02 IDENTIFICATION
A. Identify components according to Division 16 Section “Basic Electrical
Materials and Methods.”
3.03 FIELD QUALITY CONTROL
A. Manufacturer's Field Service: Engage a factory-authorized service
representative to inspect automatic power factor correction equipment
installation and connections. Report results in writing. Include the following:
1. Operational Test: After electrical circuits have been energized, connect
and observe units to confirm proper operation.
2. Replace damaged and malfunctioning controls and equipment.
B. Inspection: Perform external and internal inspections of capacitor equipment for
damage and for compliance with the Contract Documents and manufacturer's
documentation. Check electrical and mechanical bolted connections for required
torquing.
C. Testing: Perform the following and certify compliance with test parameters:
1. Test insulation resistance between capacitor temlinals and case. Follow
manufacturer's written instructions or those below:
i. Use test voltages 500 V minimum, for equipment rated 250 V and less,
and 1000 V minimum, for equipment rated more than 250 V.
5
ii. Apply test voltage for 60 seconds.
iii. Investigate, report, and resolve insulation resistance less than that
stated by manufacturer's literature or less than allowable 25 megohms
for equipment rated 250 V and less and l00 megohms for equipment
rated more than 250 V.
2. Measure capacitance of pole-to-pole capacitor combinations and compare
with manufacturer's published values. Report readings, and investigate and
resolve discrepancies more than 10% of manufacturer's nominal values.
3. Energize circuits and demonstrate electrical operating features of
automatic power factor correction units according to manufacturer's
written instructions.
D. Correct deficiencies shown by inspections and tests on site where possible, and
retest; otherwise, remove and replace with new units and retest.
E. Report of Tests and Inspections: Written record including adjustment settings.
3.04 ADJUSTING
A. Adjust for optimum automatic power factor correction.
3.05 CLEANING
A. After completing equipment installation, inspect unit components. Remove
paint splatters and other spots, dirt, and debris. Repair damaged finish to
match original finish.
B. Clean components internally, on completion of installation, according to
manufacturer's written instructions.
3.06 DEMONSTRATION
A. Train Employer's maintenance personnel to adjust, operate, and maintain the
system installation.
END OF SECTION 16280
PART 1-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract apply to this Section.
1.02 SUMMARY
A. This Section includes automatic power factor correction equipment rated
600V and less.
B. Related Sections include the following:
1. Division 16 Section "Basic Electrical Materials and Methods".
2. Connection to BMS system, including interface elements detailed in
BMS schedules and/or shown on the drawings.
1.03 SUBMITTALS
A. Product Data: For each type of product indicated include dimensions shipping,
installed, and operating weights of multiple capacitor cells or elements and
data on features, ratings and performance.
B. Shop Drawings: Detail equipment assemblies and indicate dimensions,
weights, method of field assembly, components, and location and size of each
field connection. Show access and workspace requirements and required
clearances.
1. Wiring Diagrams: Detail internal and interconnecting wiring and
differentiate between manufacturer-installed and field-installed
wiring.
C. Factory Test Reports: Evidence of product's compliance with specified
requirements.
D. Field Test Reports: Indicate and interpret test results for compliance with
performance requirements.
E. Maintenance Data: For equipment to include in maintenance manuals as well
as the following:
1. Lists of spare parts and replacement components recommended for
storage at Project site.
2. Detailed instructions covering operation under both normal and
abnormal conditions.
1.04 QUALITY ASSURANCE
A. Comply with IEEE 18, IEC 60070A and NEMA CP 1.
2
1.05 EXTRA MATERIALS
A. Furnish extra materials described below that match products installed and that
are packaged with protective covering for storage and identified with labels
describing contents. Deliver extra materials to Employer.
1. Fuses: For every 12 Provide at least (3) of each type and rating.
PART 2-PRODUCTS
2.01 MANUFACTURERS
A. Approved Manufacturers: Subject to compliance with requirements under this
section.
2.02 CAPACITORS
A. Construction: Multiple capacitor cells or elements, factory wired in threephase
groups and mounted in metal enclosures.
B. Capacitor Cells: Dry, metallized-dielectric, self-healing type. Each cell shall
be encapsulated in thermosetting resin inside plastic container.
C. Cell Rupture Protection: Pressure-sensitive circuit interrupter for each cell.
D. Capacitor-Bank Fuses: Current limiting, non-interchangeable type; factory
installed in each phase and located within the equipment enclosure. Features
include the following:
1. Interrupting Capacity: 200,000 A minimum.
2. Fuse Ratings and Characteristics: As recommended by capacitor
manufacturer.
3. Neon Indicator Lamp for Each Fuse: Connect to illuminate when fuse
has opened, but is still in place, and locate so it is visible from outside
the enclosure.
E. Discharge Resistors: Factory installed and wired.
F. Enclosure: NEMA 250, steel or aluminum, arranged to contain the fluid
leakage from capacitor cells; factory equipped with mounting brackets suitable
for type of mounting indicated.
1. Indoor Enclosures: NEMA 250, Type 12 or as indicated.
2.03 FIXED CAPACITORS
A. Description: Integrally fused, unless otherwise indicated.
B. Internal Wiring: Factory wired, ready for field connection to external circuits
at a single set of pressure terminals.
2.04 AUTOMATIC POWER FACTOR CORRECTION UNITS
A. Comply with NEMA ICS 2.
B. Description: Capacitor banks, contactors, controls, and accessories factory
installed in independent enclosures. Units include a separately mounted
3
current transformer to sense current in the power circuit being corrected and to
provide input to unit controls.
C. Performance Requirements: Controls permit selection of a target power factor,
adjustable to any value between unity and 0.80 lagging. Controls continuously
sense the power factor on circuits being corrected and, when the power factor
differs from the target setting for more than 10 seconds, operate a contractor to
switch a capacitor bank into or out of the circuit. Contactors are opened or
closed as required to bring the corrected circuit power factor closer to the
target setting Switch only one capacitor bank at a time.
D. Controls: Solid-state, microprocessor-based controls, including the following:
1. Under voltage relay that interrupts capacitor switching and disconnects
capacitors for power supply interruptions longer than 15 minutes.
2. “Advance" and "Retard" push buttons on the control panel to permit
manually controlled capacitor-bank switching.
E. Contactors: three pole; rated for the repetitive high-inrush-switching duty in
the capacitor application.
F. Buses: Plated copper.
G. Fuses for Protection of Capacitor Banks: Rated to protect contactor,
interconnecting wiring, and capacitors.
H. Inductors: Air-core-type, connected in capacitor circuits; rated to limit
switching surges to within contactor ratings.
I. Mechanical Bracing for Current-Carrying Parts: Adequate to withstand the
maximum fault current to which they may be exposed.
J. Identification of Energized Capacitor Banks: LED indicating lamps on front
panel.
K. Enclosure Access: Hinged door with hand-operated catch. Door is interlocked
with controls or main circuit breaker to de-energize capacitors when door is
opened.
L. Local Display: LED or liquid-crystal digital type, mounted in door of
enclosure.
1. Indicated target and actual power factors.
2. Accuracy: -/+ 1%.
3. Mounting: Flush or semi flush in unit door.
M. Current Transformer: Type, configuration, and ratio to suit sensing and
mounting conditions.
N. Main Circuit Breaker: Operable from outside the enclosure to disconnect the
unit.
1.Operating handle can be padlocked.
O. Power factor capacitor units shall be disconnected in case of generator
operation.
4
2.05 FACTORY FINISH
A. Manufacturer’s standard enamel over corrosion-resistant treatment or primer
coat.
2.06 SOURCE QUALITY CONTROL
A. Factory test power factor correction equipment before shipment. Comply with
NEMA CP 1. Include the following:
1. Routine capacitor production tests, including short-time overvoltage,
capacitance, leak, and dissipation- factor tests.
2. Functional test of all operations, controls, indicators, sensors, and
protective devices.
PART 3-EXECUTION
3.01 INSTALLATION
A. Install freestanding equipment on cable trenches.
B. Maintain minimum workspace according to manufacturer's written
instructions.
3.02 IDENTIFICATION
A. Identify components according to Division 16 Section “Basic Electrical
Materials and Methods.”
3.03 FIELD QUALITY CONTROL
A. Manufacturer's Field Service: Engage a factory-authorized service
representative to inspect automatic power factor correction equipment
installation and connections. Report results in writing. Include the following:
1. Operational Test: After electrical circuits have been energized, connect
and observe units to confirm proper operation.
2. Replace damaged and malfunctioning controls and equipment.
B. Inspection: Perform external and internal inspections of capacitor equipment for
damage and for compliance with the Contract Documents and manufacturer's
documentation. Check electrical and mechanical bolted connections for required
torquing.
C. Testing: Perform the following and certify compliance with test parameters:
1. Test insulation resistance between capacitor temlinals and case. Follow
manufacturer's written instructions or those below:
i. Use test voltages 500 V minimum, for equipment rated 250 V and less,
and 1000 V minimum, for equipment rated more than 250 V.
5
ii. Apply test voltage for 60 seconds.
iii. Investigate, report, and resolve insulation resistance less than that
stated by manufacturer's literature or less than allowable 25 megohms
for equipment rated 250 V and less and l00 megohms for equipment
rated more than 250 V.
2. Measure capacitance of pole-to-pole capacitor combinations and compare
with manufacturer's published values. Report readings, and investigate and
resolve discrepancies more than 10% of manufacturer's nominal values.
3. Energize circuits and demonstrate electrical operating features of
automatic power factor correction units according to manufacturer's
written instructions.
D. Correct deficiencies shown by inspections and tests on site where possible, and
retest; otherwise, remove and replace with new units and retest.
E. Report of Tests and Inspections: Written record including adjustment settings.
3.04 ADJUSTING
A. Adjust for optimum automatic power factor correction.
3.05 CLEANING
A. After completing equipment installation, inspect unit components. Remove
paint splatters and other spots, dirt, and debris. Repair damaged finish to
match original finish.
B. Clean components internally, on completion of installation, according to
manufacturer's written instructions.
3.06 DEMONSTRATION
A. Train Employer's maintenance personnel to adjust, operate, and maintain the
system installation.
END OF SECTION 16280
No comments:
Post a Comment