Download section 16280

Chrysler LLC
Construction Standards
12/17/04
SECTION 16280 – STATIC VAR COMPENSATION
PART 1 - GENERAL
1.1
SUMMARY
A.
1.2
This Section includes automatic power factor correction equipment, with harmonic filters, rated
600 V and less.
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.
Operation and Maintenance Data: 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.
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.
B.
Comply with IEEE 18 and NEMA CP 1.
C.
Comply with NFPA 70.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
2.2
Manufacturers: Subject to compliance with requirements, provide products by one of the following:
1.
Automatic Power Factor Correction Units with Harmonic Filters:
a.
Cutler Hammer.
b.
General Electric Company.
c.
Square D Co.
d.
Siemens.
AUTOMATIC POWER FACTOR CORRECTION UNITS WITH HARMONIC FILTERS
A.
Description: Custom multi-step power factor control equipment to maintain a selected power
factor automatically, adjusting to the system load requirements in steps. The equipment will include reactors to filter harmonics and prevent capacitor overload.
STATIC VAR COMPENSATION
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Chrysler LLC
Construction Standards
12/17/04
B.
Cabinet construction:
1.
NEMA 250, Type 1, steel or aluminum, with hinged door and hand-operated catch.
2.
Steel cabinet enclosure with light gray paint, 12 gauge frame and 14 gauge panels.
3.
Removable lifting eyes.
4.
Top entry.
5.
Door shall be interlocked with controls or main circuit breaker to de-energize capacitors
when door is opened and to prevent entry while the system is energized.
6.
Lockable door handle.
7.
Convection cooling - no fans required.
8.
Modular construction to allow addition of cabinets in the field to accommodate future expansion.
C.
Main Disconnect Switch or Circuit Breaker:
1.
Operable from outside the enclosure to disconnect the unit.
2.
Operating handle with padlocking provisions.
D.
Controls:
1.
Solid-state microprocessor based controller with built-in voltage, temperature, and harmonic alarms to provide indication of potential or real failure.
2.
Digital display of power factor, current and capacitor step status.
3.
Controls to select a target power factor, adjustable to any value between unity and 0.80
lagging.
4.
Continuously sense the power factor and, when the power factor differs from the target
setting for more than 10 seconds, operate a contactor to switch a capacitor bank into or
out of the circuit.
a.
Contactors open or close to correct circuit power factor closer to the target setting.
b.
Switch only one capacitor bank at a time.
c.
Three pole contactors, rated for the repetitive high-inrush-switching duty in the capacitor application.
5.
Correction Step Size: 500 KVAR for 480 V transformers and 300 KVAR for 240 V transformers.
6.
Undervoltage relay that interrupts capacitor switching and disconnects capacitors for
power supply interruptions longer than 15 minutes.
7.
"Advance" and "Retard" push buttons on the control panel to permit manually controlled
capacitor-bank switching.
E.
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.
7.
LED lamps indicating energized capacitor banks.
F.
Bus:
1.
Plated copper
2.
75,000 AIC bracing
G.
Fuses:
1.
Rated to protect contactor, interconnecting wiring, and capacitors
2.
Three fuses for each step
3.
Blown fuse indication lights.
STATIC VAR COMPENSATION
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Chrysler LLC
Construction Standards
12/17/04
H.
Inductors:
1.
Air-core-type, connected in capacitor circuits; limit switching surges to within contactor
ratings.
2.
Harmonic filter reactors tuned to the 5th and 7th harmonics or as required to prevent capacitor overload.
I.
Capacitors:
1.
Industrial duty
2.
Three phase, self-healing metallized electrode capacitors
3.
Provide 200 KAIC rated current limiting fuses in all 3 phases.
J.
Capacitor Precharge Circuit:
1.
Resistive circuit to charge capacitors before switching to limit switching surges.
K.
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.
L.
Remote Alarm: Provide alarm relay contact for remote indication of the following conditions:
1.
Summary “Trouble” contact to activate if any of the local System Alarms specified are set.
M.
Current Transformer: Type, configuration, and ratio to suit sensing and mounting conditions.
N.
Remote Monitoring: 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 communicate with the Ethernet gateway device as specified
under Division 16 Section “480 Volt Unit Substations” to transmit the following data.
1.
System in alarm.
2.
Power factor set-point.
3.
Corrected power factor.
4.
Number of capacitor steps activated.
2.3
FACTORY FINISH
A.
2.4
Manufacturer's standard enamel over corrosion-resistant treatment or primer coat.
SOURCE QUALITY CONTROL
A.
Test power factor correction equipment before shipment. Comply with NEMA CP 1 and the following:
1.
Manufacturer’s standard capacitor and harmonic filter production tests, including shorttime overvoltage, capacitance, leak, and dissipation-factor tests.
2.
Functional test of all operations, controls, indicators, sensors, and protective devices.
STATIC VAR COMPENSATION
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Chrysler LLC
Construction Standards
12/17/04
PART 3 - EXECUTION
3.1
IDENTIFICATION
A.
3.2
Identify components according to Division 16 Section "Electrical Identification."
FIELD QUALITY CONTROL
A.
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.
B.
Testing: Perform the following and certify compliance with test parameters:
1.
Test insulation resistance between capacitor terminals and case. Follow manufacturer's
written instructions or those below:
a.
Use test voltages 500 V minimum, for equipment rated 250 V and less, and 1000 V
minimum, for equipment rated more than 250 V.
b.
Apply test voltage for 60 seconds.
c.
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 100 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 percent of manufacturer's nominal values.
C.
Correct deficiencies shown by inspections and tests on site where possible, and retest; otherwise, remove and replace with new units and retest.
D.
Report of Tests and Inspections: Written record.
3.3
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.
END OF SECTION
STATIC VAR COMPENSATION
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