262313 Generator Paralleling Cont seismic.pdf

UPGRADE EMERGENCY POWER IN BUILDING 138

VAMC, MARION, IN PROJECT: 610-16-104

01-01-17

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SECTION 26 23 13

GENERATOR PARALLELING CONTROLS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies the furnishing, installat ion, connection, and testing of indoor control components for medium-vol tage paralleling

Standby Electrical System generators.

B. The generator paralleling controls shall be comp atible and functional with the switchgear, engine generators, remote annu nciators, and all related components.

1.2 RELATED WORK

A. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL

COMPONENTS: Requirements for seismic restraint of n onstructural components.

B. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL IN STALLATIONS:

Requirements that apply to all sections of Division 26.

C. Section 26 05 26, GROUNDING AND BONDING FOR ELEC TRICAL SYSTEMS:

Requirements for personnel safety and to provide a low impedance path for possible fault currents.

D. Section 26 05 73, OVERCURRENT PROTECTIVE DEVICE COORDINATION STUDY:

Short circuit and coordination study, and requireme nts for a coordinated electrical system.

E. Section 26 13 13, MEDIUM-VOLTAGE CIRCUIT BREAKER SWITCHGEAR: Medium-voltage enclosures, busing, and circuit breakers fo r generator paralleling switchgear.

F. Section 26 32 13, ENGINE GENERATORS: Engine gene rators.

1.3 QUALITY ASSURANCE

A. Quality Assurance shall be in accordance with Pa ragraph, QUALIFICATIONS

(PRODUCTS AND SERVICES) in Section 26 05 11, REQUIR EMENTS FOR

ELECTRICAL INSTALLATIONS.

1.4 FACTORY TESTS

A. Factory Tests shall be required.

B. Factory Tests shall be in accordance with Paragr aph, MANUFACTURED

PRODUCTS in Section 26 05 11, REQUIREMENTS FOR ELEC TRICAL

INSTALLATIONS, and the following requirement:

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1. Generator paralleling controls shall be tested t o assure that there are no electrical or mechanical defects. Tests shal l be conducted in accordance with UL and ANSI standards.

1.5 SUBMITTALS

A. Submit in accordance with Paragraph, SUBMITTALS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, and the following requirements:

1. Shop Drawings:

a. Per the requirements of Section Section 26 13 13 , MEDIUM-VOLTAGE

CIRCUIT BREAKER SWITCHGEAR.

b. Include sequences of operation and interconnecti ng controls diagrams, showing connections to switchgear, genera tors, automatic transfer switches, and remote annunciator s.

c. Certification from the manufacturer that repre sentative generator paralleling controls have been seismically tested t o

International Building Code requirements. Certific ation shall be based upon simulated seismic forces on a shake tabl e or by analytical methods, but not by experience data or o ther methods.

2. Manuals:

a. When submitting the shop drawings, submit compan ion copies of complete maintenance and operating manuals, includi ng technical data sheets, wiring diagrams, and information for o rdering replacement parts.

1) The terminals of wiring diagrams shall be identi fied to facilitate installation, maintenance, and operation .

2) Wiring diagrams shall indicate internal wiring f or each piece of equipment and the interconnection between the pi eces of equipment, including related equipment specified in other sections.

3) Provide a clear and concise description of opera tion, including detailed information required to properly operate the equipment.

4) Approvals shall be based on complete submissions of manuals together with shop drawings.

b. If changes have been made to the maintenance and operating manuals originally submitted, submit updated mainte nance and operating manuals two weeks prior to the final insp ection.

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3. Test Reports:

a. Two weeks prior to the final inspection, submit certified field test reports and data sheets.

4. Certifications: Two weeks prior to the final ins pection, submit the following.

a. Certification by the manufacturer that the gener ator paralleling controls conform to the requirements of the drawing s and specifications.

b. Certification by the Contractor that the generat or paralleling controls have been properly installed, connected, a nd tested.

1.6 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specif ication to the extent referenced. Publications are referenced in t he text by the basic designation only.

B. International Code Council (ICC):

IBC-15..................International Building Code

C. National Fire Protection Association (NFPA):

70-17...................National Electrical Code (N EC)

99-15...................Health Care Facilities

110-16..................Emergency and Standby Power Systems

D. National Electrical Manufacturers Association (N EMA):

250-14..................Enclosures for Electrical E quipment (1000 Volts

Maximum)

ICS 6-11................Enclosures

E. Underwriters Laboratories Inc. (UL):

50-15...................Enclosures for Electrical E quipment

508A-13.................Industrial Control Panels

PART 2 – PRODUCTS

2.1 GENERATOR PARALLELING CONTROLS

A. Generator paralleling controls shall be integral to the switchgear housed in a separate cubicle. The functional requ irements are identical for all system topologies.

B. The generator paralleling controls shall perform automatic and manual operation, synchronization, load management, monito ring, and alarm annunciation functions of the paralleled engine gen erator system.

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C. The control logic shall be distributed between t he generator paralleling controls and each engine generator such that each engine generator is capable of starting and paralleling to the bus, in the event of failure of the generator paralleling contr ols and receipt of a start signal from any automatic transfer switch.

D. The master control and display panel shall be a touchscreen panel, or a combination of digital and analog control, monitori ng, and alarm devices. The generator paralleling control logic a nd master control and display panel shall be such that the master con trols will continue to function in the event of a master control and di splay panel failure.

1. The master control and display panel shall indic ate the following status information:

a. Status of utility-source and generator-source bu ses.

b. Status of each utility- and generator-source cir cuit breaker, including protective relays if applicable.

c. Status of each engine generator, including start , run, stop, off, automatic operation, manual operation, speed in rot ations per minute (RPM), oil pressure, coolant temperature, ho urs of operation.

2. The master control and display panel shall indic ate and trend the following metering information on a per-phase, line -to-line, line-to-neutral, and summary basis as applicable.

a. Instantaneous and average volts, amperes, kilowa tts, kilovars, kilovolt-amperes, frequency, and power factor for e ach utility and generator bus, and for each utility and generat or source.

b. Demand amperes, kilowatts, and kilovolt-amperes for each utility and generator bus, and for each utility and generat or source.

3. The master control and display panel shall provi de the following control functions for each generator.

a. Automatic, manual, start, stop.

4. The master control and display panel shall provi de the following system control functions.

a. Automatic, manual, exercise, test with load, and test without load operation.

b. Load management functions that monitor bus loads and automatically or manually control generators to mee t system requirements, including prioritization of Essential and Normal

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Electrical System loads and groups of loads as show n on the drawings, and operation under failure conditions of one or more engine generators.

c. Password-protected means to alter the system pro gramming.

5. The master control and display panel shall provi de the following alarm functions.

a. All alarms annunciated by each engine generator.

b. All system alarms.

E. The master control and display panel shall be po wered by at least two sources, which may be from engine generator start b atteries and/or switchgear station batteries.

F. Interconnecting Communications Protocol and Medi a: The generator paralleling controls shall be interconnected to the switchgear, engine generators, by a dedicated fiber optic network. Th e network shall be per the requirements of Section 27 15 00, COMMUNICA TIONS HORIZONTAL

CABLING. Provide all necessary fiber optic and copp er media, raceways, hardware, software, and programming necessary to es tablish interconnection between all components. All equipme nt shall share a non-proprietary and open topology and communication s protocol.

2.2 REMOTE ANNUNCIATOR PANEL

A. A remote annunciator panel shall be installed at in the Boiler Plant as shown on drawings.

B. The annunciator shall indicate alarm conditions as required by NFPA 99 and 110.

C. Include control wiring between the remote annunc iator panel and the engine generator. Wiring shall be as required by th e manufacturer.

2.3 PARALLELING OPERATION

A. Emergency Mode:

1. Upon initiation of the automatic start sequence, all engine generators shall start. The first engine generator to achieve 90% of nominal voltage and frequency shall be connected to the bus. All first priority loads shall be transferred to the bu s upon sensing availability of power on the bus. As the remaining engine generators start, their respective synchronizers shall initiat e control of voltage and frequency of the oncoming set with the bus. Upon synchronizing with the bus, the oncoming engine gen erator shall be paralleled on the bus. Each time an additional engi ne generator is

26 23 13 - 6 added to the bus, the remaining loads shall be tran sferred in priority sequence, until all loads are connected to the bus. The generator paralleling controls shall prevent the au tomatic transfer of loads to the bus until there is sufficient capac ity to carry these loads. Provision shall be made to manually ov erride the load addition circuits for supervised operation.

2. Load management sensing shall be furnished to en sure that sufficient generating capacity is connected to the bus to carr y the load. The load management sensing shall also ensure that not more than the required capacity plus a limited reserve is connect ed to the bus at any time. The system in conjunction with the load m anagement shall ensure maximum efficiency in the utilization of eng ine generators to ensure maximum fuel economy.

3. Load management sensing shall ensure that the on -line reserve capacity does not fall to less than 10% or exceed m ore than 110% of a single engine generator. Upon sensing if the conn ected load exceeds the present limit for an established period of time, the next engine generator will be started and parallele d. If upon sensing, the connected load is determined to be les s than the preset limit for an established period of time, the last e ngine generator to be paralleled will be disconnected and shut down . Its controls will be automatically reset so that the engine gene rator will be ready for next operation.

4. While one engine generator is connected to the b us, and if the connected load exceeds the capacity of the bus, res ulting in a decrease in system frequency to 58 Hz or less, load dumping will be initiated to reduce the connected load within the c apacity of the bus. Similarly, with increased loading, the remaini ng engine generator will be signaled to start and be parallel ed to the engine generator already connected to the bus, and the loa d dump signal will be automatically cancelled. Upon restoration o f the normal source of power supply, as defined in the generator paralleling controls for an adjustable period of 0 to 30 minute s, the loads shall be transferred back to the normal power sourc e. Subsequently, the engine generator shall be disconnected from the bus, run for an adjustable period of time up to 15 minutes maximum for cool down, and then shut down. All controls associated with op eration of the

26 23 13 - 7 engine generator shall automatically reset for the next automatic operation.

B. Manual Mode: The engine generators and automatic transfer switch(es) can be operated manually.

C. Exercising Mode: Incorporate controls so as to a llow automatic and manual testing of each engine generator and remotel y located transfer switch.

D. Utility Peak Demand Reduction Mode:

The system shall include control equipment which w ill operate the standby power system to reduce utility peak demand in the following way:

1. Upon initiation of an automatic sequence for uti lity peak demand reduction operation, all engine generators shall be started. The first engine generator to achieve 90% of nominal vo ltage and frequency shall be connected to the bus. The first peak reduction transfer switch shall then be signaled to transfer its load to the bus. As the remaining engine generators start and a chieve 90% of nominal voltage and frequency, their individual aut omatic synchronizers shall initiate control of voltage and frequency to bring the oncoming engine generators into synchroni sm with the bus.

Upon achieving synchronism, the oncoming engine gen erators shall be paralleled. As these oncoming engine generators are paralleled, the system shall signal additional peak reduction trans fer switches to connect their loads to the bus.

2. The system shall prevent load transfer to the bu s until there is sufficient capacity to carry the additional loads. Provisions shall be included to manually override the load addition circuits for supervised operation.

3. Upon termination of the utility peak demand redu ction operation, the loads shall be retransferred to the normal power so urce. The engine generators shall be disconnected from the bus, run for a cool down period, and shut down.

4. If while operating in the utility peak demand re duction mode, a normal source of failure occurs at any Essential El ectrical System automatic transfer switch, then the peak demand red uction operation shall be terminated. Upon receipt of signal that th e normal source

26 23 13 - 8 has failed, all peak loads shall be shed and the sy stem shall return to Emergency Mode.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Installation shall be as shown on the drawings, manufacturer’s instructions, and per Section 26 13 13, MEDIUM-VOLT AGE CIRCUIT BREAKER

SWITCHGEAR.

B. In seismic areas, generator paralleling controls shall be adequately anchored and braced per details on structural contr act drawings to withstand the seismic forces at the location where installed.

3.2 ACCEPTANCE CHECKS AND TESTS

A. An authorized representative of the generator pa ralleling controls manufacturer shall technically supervise and partic ipate during all of the field adjustments and tests. Major adjustments and field tests shall be witnessed by the COR. The manufacturer’s representative shall certify in writing that the equipment has been inst alled, adjusted, and tested in accordance with the manufacturer’s recomm endations.

B. Perform in accordance with the manufacturer's re commendations. In addition, include the following:

1. Visual Inspection and Tests:

a. Compare equipment nameplate data with specificat ions and approved shop drawings.

b. Inspect physical, electrical, and mechanical con dition.

c. Vacuum-clean enclosure interior. Clean enclosur e exterior.

d. Verify appropriate equipment grounding.

e. Verify appropriate anchorage and required area c learances.

2. Systems Tests:

a. Verify proper operation of all control, monitori ng, trending, and alarm functions.

b. Verify undisrupted operation of the system under conditions of loss of the generator paralleling controls.

c. Test and verify continuity of all interconnectin g copper and fiber optic control media.

C. Perform all acceptance checks and tests specifie d in Section 26 13 13, MEDIUM-VOLTAGE CIRCUIT BREAKER SWITCHGEAR, Section 26 32 13 and ENGINE

GENERATORS.

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3.3 FOLLOW-UP VERIFICATION

A. Upon completion of acceptance checks, settings, and tests, the

Contractor shall demonstrate that the generator par alleling controls are in good operating condition and properly perfor ming the intended function.

3.4 INSTRUCTION

A. Furnish the services of a factory-trained techni cian for two 4-hour periods to instruct personnel in the operation and maintenance of the generator paralleling controls and related equipmen t on the date requested by the COR.

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