PSG Section 16280E

SWITCHED POWER FACTOR AND Optional HARMONIC CORRECTION EQUIPMENT MEDIUM VOLTAGE

SECTION 16280E

section 16280E

SWITCHED POWER FACTOR AND HARMONIC CORRECTION equipment MEDIUM voltage

PART 1 General

1.01 Scope

A. The Contractor shall furnish and install Metal Enclosed Capacitor equipment as specified herein and as shown on the contract drawings.

B. This specification contains the minimum requirements for the design, manufacture and testing of three phase, 50 or 60 Hertz self contained padmounted Metal Enclosed Capacitor Banks rated 15 kV and below used for power factor improvement and harmonic mitigation.

C. Should the manufacturer or supplier of the equipment specified under this section take exception to any part of this specification, he shall so state in his bid, by reference to each item number.

1.02 Related Sections

1.03 References

A. The Metal Enclosed Capacitor equipment shall be designed and tested in accordance with the latest standards of NEMA, NEC, IEC, IEEE and ANSI.

1.04 Submittals for review/Approval

A. The following information shall be submitted to the Engineer:

1. Master drawing index

2. Front view elevation

3. Floor plan

4. Top view

5. Nameplate schedule

6. Conduit entry/exit locations

7. Equipment ratings including:

a. Short-circuit rating

b. Voltage

c. Continuous current

8. Major component ratings including:

a. Voltage

b. Continuous current Interrupting ratings

c. Cable terminal sizes

9. Product data sheets.

1.05 Submittals for construction

A. The following information shall be submitted for record purposes:

1. Final as-built drawings and information for items listed in Paragraph 1.04, and shall incorporate all changes made during the manufacturing process

2. Certified production test reports

3. Installation information

1.06 Qualifications

A. The manufacturer of the assembly shall be the manufacturer of the major components within the assembly.

B. For the equipment specified herein, the manufacturer shall be ISO 9001 or 9002 certified.

C. The manufacturer of this equipment shall have produced similar electrical equipment for a minimum period of five (5) years. When requested by the Engineer, an acceptable list of installations with similar equipment shall be provided demonstrating compliance with this requirement.

1.07 Delivery, Storage and Handling

A. Equipment shall be handled and stored in accordance with manufacturers instructions. One (1) copy of these instructions shall be included with the equipment at time of shipment.

1.08 Operation and Maintenance Manuals

A. Equipment operation and maintenance manuals shall be provided with each assembly shipped and shall include instruction leaflets, instruction bulletins and renewal parts lists where applicable, for the complete assembly and each major component.

PART 2 products

2.01 manufacturers

A. Eaton

B. (_______________

C. (_______________

The listing of specific manufacturers above does not imply acceptance of products that do not meet the specified ratings, features and functions. Manufacturers listed above are not relieved from meeting these specifications in their entirety. Products in compliance with the specification and manufactured by others not named will be considered only if pre-approved by the Engineer ten (10) days prior to bid date.

2.02 ratings

A. The system operating voltage shall be as indicated on the contract drawings.

B. The total capacity of the Metal Enclosed Capacitor unit shall be (________ kvar. The total kvar capacity shall be divided into (________ kvar non-switched (fixed) and (_______ kvar automatically switched in steps of (_______ kvar

C. The Metal Enclosed Capacitor bank unit shall utilize a modular design with provisions for expansion to (_______.kvar

D. The capacitor shall be rated for continuous duty at 40 degree C ambient at 3,300 ft. (1,000 meters) and below. The nominal rating if the capacitor cell shall be 1.08 times the voltage rating of the system

E. Total Harmonic Distortion (THD) of 5% of voltage waveforms shall not affect the life of capacitors, contactors or controller.

F. A +/- 10% variation in line voltage shall not affect the life of the capacitor.

2.03 construction

A. ENCLOSURE

1. Provide ([NEMA 1A GASKETED Enclosure for INDOOR application] [NEMA 3R OUTDOOR enclosure] as shown on the contract drawings. The structure shall be front accessible, free standing with necessary provisions for ventilation and handling.

2. Provide thermostatically controlled heaters for condensation control.

3. Filters shall be provided to prevent dust and insect entry. Filters shall be removable for replacement or cleaning purposes.

4. Structures shall consist of a bolted steel frame with formed steel doors and side sheets. Top and rear covers shall be sheet steel sloped from front to rear.

5. Thermostatically controlled forced air ventilation shall be provided in all compartments.

6. Copper bus shall be properly sized to handle continuous current rating of capacitor bank as well as a minimum of 25% future expansion.

B. Incoming Section

1. Unit shall have an integrally mounted, assembled isolation disconnect rated 7.2kV 200A with current limiting fuses, grounding contacts, a 3 pole vacuum contactor, and 500 VA control transformer.

2. ([Distribution class arresters shall be provided for lightning protection.]

3. ([Current limiting line fuses shall be provided for equipment short circuit protection sized a minimum of 125% of required amperage.]

C. Capacitor Section

1. Capacitors shall be low loss, 2 or 3 bushing, properly sized and connected per the specification. The capacitors shall have the following features:

a. Internal discharge resistors to drain voltage to 50 volts or less in five minutes.

b. Suitable for operation at 110 percent of rated voltage, and 135 percent of rated current minimum.

c. Capacitors shall be rated [60 kV/95 kV] BIL.

d. Capacitors shall be configured in [delta/wye] arrangement.

2. Current limiting capacitor fuses with current and voltage ratings appropriate for the capacitor shall protect stage and capacitors.

D. Reactors 1. The reactor shall be tuned to the (________th harmonic for harmonics mitigation. The reactor shall have copper windings, Class H 220 degrees C insulation system, and be designed with open frame construction. 2. Thermal protection shall be three normally closed auto reset thermostats.

E. Contactors1. Contactors shall be rated for switching of capacitors by the contactor manufacturer.

F. Control Section Features:

1. The control section shall include a power factor controller with a digital power factor meter.

2. Programmable set points for all functions.

3. Stage anti-cycling timers programmable to not less than 5 minutes.

4. Power Factor 'Out-of-Range' alarm.

5. High harmonic content (>5% THD voltage) alarm.

6. On-Off-Auto switches for operation of the switched steps.

7. 'Power On' and 'Unit Alarm' indicating lights.

8. Capacitor "Stage Ready and Stage On" indicating lights .

9. Terminal block for interface to external control systems.

G. Key Interlock System

1. Unit main disconnect shall be key interlocked with unit ground switch and enclosure doors.

2. Interlocking system shall utilize a single key. Key shall be held captive in unit main disconnect lock until unit main disconnect is opened. After locking the unit main disconnect in the open position, key may be removed and inserted in unit ground switch lock. The ground switch can then be closed and locked. Key may then be removed with ground switch in closed position to allow for unlocking unit enclosure doors.

3. Interlock system shall prohibit ground switch closure unless the unit main disconnect switch is locked open. Ground switch opening shall not be permitted unless all the capacitor section doors have been locked closed.

H. Bank Protection

1. Unit shall have a weatherproof alarm strobe light and dry contacts for customer remote alarm.

2.04 nameplates

A. Each unit will have a 1.0 x 2.5-inch nameplate. The lettering shall be black 3/16-inch high, on a silver background.

2.05 finish

A. Metal Enclosed capacitor equipment enclosures shall be provided with a powder coat paint finish. Exterior color shall be ANSI 61.

2.06 SYSTEM COMPATIBILITY

A. A system compatibility analysis shall be performed by the automatic capacitor bank manufacturer. The contractor shall provide the capacitor bank manufacturer, at the time of request for quote, the data listed below.B. This analysis shall be done to identify any potential or existing harmonics current sources. The data will be used to determine if the capacitor bank can be installed without the addition of chokes or filters.

1. Total kvar to be added (____________ kvar

2. kvar currently on the system (____________ kvar

3. Main transformer impedance (____________%; (____________ KVA

4. Primary transformer voltage (____________ V

5. Secondary transformer voltage (____________ V

6. Nominal load information: (____________KW, (____________KVA, (____________Power Factor

7. Desired power factor (____________%

8. The following list summarizes major non-linear loads (in HP). (List major non-linear loads for the facility.)

PART 3 execution

3.01 factory testing

A. All capacitors shall be tested in compliance with NEMA, and ANSI requirements for capacitance, dissipation factor, terminal to terminal and terminal to case dielectric strength, and oil leaks. All capacitor cells shall be traceable through construction and testing.

B. The automatic power factor capacitor correction unit shall be tested for proper operation prior to leaving the factory. The following checks, measurements, and operations must be confirmed and recorded for each stage. A certified test report shall be provided with each automatic capacitor bank.

1. Wire connections

2. Torque connections

3. Phase to Phase resistance checks

4. Phase to Phase capacitance checks

5. Controller operation, manual operation

6. Controller operation, automatic operation

3.02 examination

A. Contractor shall fully inspect shipments for damage. If units are damaged in transit, contractor shall refuse delivery, file claim with carrier and report damage to the manufacturer.

3.03 installation

A. The Contractor shall follow the installation instructions supplied by the manufacturer.

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16280E-5

08/23/11