Attachment 3 - 263535 POWER-FACTOR CORRECTION JAN18.pdf

JUBA ELECTRICAL UPGRADE DEVELOPMENT July 13, 2020

JUBA SOUTH SUDAN Issued for Bid

POWER FACTOR CORRECTION EQUIPMENT SECTION 263535 - 1

SECTION 263535 - POWER FACTOR CORRECTION EQUIPMENT

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes power and automatic power factor correction equipment rated 600 V and less.

1.2 SUBMITTALS

A. Product Data: For each type of product indicated. Include dimensions, operating characteristics 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: Power, signal, and control wiring.

C. Field quality-control test reports.

D. Operation and Maintenance Data: For equipment to include in emergency, operation, and maintenance manuals. Include 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.

1.3 QUALITY ASSURANCE

A. Testing Agency Qualifications: Testing agency as defined by OSHA in 29 CFR 1910.7 or a member company of the InterNational Electrical Testing Association and that is acceptable to authorities having jurisdiction.

1. Testing Agency's Field Supervisor: Person currently certified by the InterNational

Electrical Testing Association or the National Institute for Certification in Engineering

Technologies to supervise on-site testing specified in Part 3.

B. Comply with IEEE 18 and NEMA CP 1.

C. Comply with requirements of the OBO Electrical Code (NFPA 70, “National Electrical Code” as amended by OBO).

1. Electrical Components, Devices, and Accessories: Listed and labeled as defined in

NFPA 70, Article 100 by a testing agency acceptable to Contracting Officer/COR based upon input from OBO/PDCS/DE/EE, and marked for intended use.

POWER FACTOR CORRECTION EQUIPMENT SECTION 263535 - 2

1.4 COORDINATION

A. Coordinate sensor-communication module package with data network and with monitoring equipment specified in Section 260913 "Electrical Power Monitoring" for successful transmission and remote readout of remote monitoring data specified in this Section.

1.5 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 Government.

1. Fuses: One for every 10 of each type and rating, but not less than three of each.

PART 2 - PRODUCTS

2.1 CAPACITORS, GENERAL

A. Unusual Service Conditions: Capacitor equipment suitable for the following conditions:

B. Construction: Multiple capacitor cells or elements, factory wired in three-phase groups and mounted in metal enclosures.

C. Capacitor Cells: Dry, metallized-dielectric, self-healing type. Each cell shall be encapsulated in thermosetting resin inside plastic container.

D. Cell Rupture Protection: Pressure-sensitive circuit interrupter for each cell.

E. Capacitor-Bank Fuses: Where required, current-limiting, noninterchangeable 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.

F. Discharge Resistors: Factory installed and wired. Resistors may be omitted if permitted by the

OBO Electrical Code.

G. 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. Outdoor Enclosures: NEMA 250, Type 4, equipped with watertight conduit connections.

2.2 FIXED CAPACITORS

POWER FACTOR CORRECTION EQUIPMENT SECTION 263535 - 3

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.

2.3 AUTOMATIC POWER FACTOR CORRECTION UNITS

A. Comply with NEMA ICS 2.

B. Description: Capacitor banks, contactors, controls, and accessories factory installed in independent enclosures and motor-control center, with a connection to motor-control center bus.

Units include a separately mounted 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 0.95 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. Install the capacitive kVAR throughout the distribution system by placing capacitors at major load centers such as motor control centers or large motors, rather than to concentrate it all at the service entrance. The power factor shall be corrected to 0.95 lag unless a higher level of correction is required to avoid power factor charges by the power company.

E. Controls: Solid-state, microprocessor-based controls, including the following:

1. Undervoltage 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.

F. Contactors: Three pole; rated for the repetitive high-inrush-switching duty in the capacitor application.

G. Buses: Plated copper.

H. Fuses for Protection of Capacitor Banks: Rated to protect contactor, interconnecting wiring, and capacitors.

I. Inductors: Air-core-type, connected in capacitor circuits; rated to limit switching surges to within contactor ratings.

J. Precharge Capacitor Circuit: Resistive, precharge circuit to charge capacitors prior to switching and to limit switching surges to within contactor ratings.

K. Mechanical Bracing for Current-Carrying Parts: Adequate to withstand the maximum fault current to which they may be exposed.

L. Identification of Energized Capacitor Banks: LED indicating lamps on front panel.

POWER FACTOR CORRECTION EQUIPMENT SECTION 263535 - 4

M. Enclosure Access: Steel or aluminum, with hinged door and hand-operated catch. Door shall be interlocked with controls or main circuit breaker to de-energize capacitors when door is opened.

N. Local Display: LED or liquid-crystal digital type, mounted in door of enclosure, indicating the following:

1. Target and actual power factors accurate to plus or minus 1 percent of reading.

2. Steps energized.

3. Step reconnection delay.

4. Real and reactive currents.

5. Voltage THD.

6. Alarm codes.

O. System Alarms: Alarm relay and local display indication of the following conditions:

1. Low power factor.

2. Leading power factor.

3. Frequency not detected.

4. Overcurrent.

5. Overvoltage.

6. Overtemperature.

7. Excessive voltage THD.

8. Capacitor overload.

9. Loss of capacitance.

P. Current Transformer: Type, configuration, and ratio to suit sensing and mounting conditions.

Q. Main Circuit Breaker: Operable from outside the enclosure to disconnect the unit.

1. Operating handle can be padlocked.

R. Remote Monitoring Components: Sensors, associated communication modules, and network interface units, matched to and compatible with electrical power monitoring and control network. Communication module shall have capability to transmit the following data to remote monitoring devices:

1. System in alarm.

2. Power factor set-point.

3. Corrected power factor.

4. Number of capacitor steps activated.

S. Transient Voltage Surge Suppression: Provide the TVSS protection with “sine wave tracking” capability to minimize equipment damage. Maximum lead length of the TVSS is 460 mm.

2.4 FACTORY FINISH

A. Manufacturer's standard enamel over corrosion-resistant treatment or primer coat.

POWER FACTOR CORRECTION EQUIPMENT SECTION 263535 - 5

2.5 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

3.1 INSTALLATION

A. Install freestanding equipment on concrete bases. Cast-in-place concrete is specified in Section

033000 “Cast-in-Place Concrete.”

B. [Comply with mounting and anchoring requirements specified in Division 26 Section on

Vibration and Seismic Controls for Electrical Systems.]

C. Maintain minimum workspace according to manufacturer's written instructions.

D. Connect remote monitoring communication module to electrical power monitoring and control data network through appropriate network interface unit.

E. Identify components according to Division 26 Section on Identification for Electrical Systems.

3.2 FIELD QUALITY CONTROL

A. Prepare for acceptance tests as follows:

1. Test insulation resistance for each power factor correction capacitor element, bus, component, connecting supply, feeder, and control circuit.

2. Test continuity of each circuit.

B. Manufacturer's Field Service: Engage a factory-authorized service representative to perform the following:

1. Inspect capacitors, wiring, components, connections, and equipment installation.

2. Assist in field testing of equipment including pretesting and adjusting of automatic power factor correction units.

3. Report results in writing.

C. Testing Agency: Engage a qualified independent testing and inspecting agency to perform field tests and inspections and prepare test reports.

D. Perform the following field tests and inspections and prepare test reports:

POWER FACTOR CORRECTION EQUIPMENT SECTION 263535 - 6

1. Perform each electrical test and visual and mechanical inspection, except optional tests, stated in NETA ATS, "Capacitors and Reactors - Capacitors." Certify compliance with test parameters.

E. Correct malfunctioning units on-site, where possible, and retest to demonstrate compliance;

otherwise, replace with new units and retest.

3.3 ADJUSTING

A. Adjust for optimum automatic power factor correction.

3.4 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.

3.5 DEMONSTRATION

A. Engage a factory-authorized service representative to train Government's maintenance personnel to adjust, operate, and maintain automatic power factor correction units. Demonstrate method of determining optimum settings for system controls.

B. Conduct a minimum of two hours' training.

END OF SECTION 263535