CORE & SHELL SECTION TRANSFER SWITCHES

Transcription

1 SECTION PART 1 - GENERAL 1.1 SUMMARY A. This Section includes transfer switches rated 600 V and less, including the following: 1. Automatic transfer switches. 2. Bypass/isolation switches. 3. Remote annunciation. 1.2 PERFORMANCE REQUIREMENTS A. Overcurrent Protective Device Coordination: All overcurrent protective devices proposed for inclusion in the Work shall be selected to be selectively coordinated with the overcurrent protective devices installed on their supply side such that an overcurrent event (overload, shortcircuit, or ground-fault) occurring at the lowest level in the system (branch circuit) cannot cause the feeder protective device supplying the branch circuit panelboard to open. This coordination shall be carried through each level of distribution for all branches of emergency power. Refer to Division 26 Section "Overcurrent Protective Device Coordination Study" for additional requirements. B. Sequence of Operation for Automatic Transfer 1. Loss of Normal Source: a. After an adjustable time delay period of 0-10 seconds (default setting of 1 seconds), the Engine starting contacts shall close to initiate the starting of the standby engine-generator set when any of the following occur: 1) Voltage on any phase of the normal source drops below 80-percent of nominal or increases to 120-percent of nominal. 2) Frequency drops below 90-percent of nominal or increases to 110-percent of nominal. 3) Voltage differential between phases is greater than 20-percent. b. When the emergency source has reached a voltage value of 90-percent of nominal and achieved frequency within 95-percent of the rated value, the load shall be transferred to the emergency source based on the following: 1) Delayed Transition Switches: a) When the emergency source has reached the values listed above, the load shall be transferred to the neutral position for an adjustable time period of 0-10 seconds. Upon completion of this neutral time delay the switch shall be transferred to the emergency source. 2. Restoration of Normal Source: a. Upon restoration of normal power source on all phases to a preset value of 90- percent to 110-percent of rated voltage, 95-percent to 105-percent of rated frequency, and below 20-percent, voltage differential, the switch shall retransfer to the normal source based on the following: 1) Delayed Transition Switches: a) When the normal source has been restored to the values listed above, and the time delay transfer to normal has expired, the load shall be retransferred to the neutral position for an adjustable time period of 0-10 seconds. After which the switch shall be connected to the normal source

2 b. After retransfer to normal, the generator set shall be allowed to operate at no load for an adjustable period of 0-10 minutes (default setting at 5 minutes). The generator shall run unloaded for this time period and then automatically shut down. The generator shall be ready for automatic operation upon the next failure of the normal source. 3. Special Conditions and Failure Modes: a. If the engine generator should fail while carrying the load, retransfer to the normal source shall be made instantaneously upon restoration of proper voltage (90- percent) on the normal source. b. Bypass-isolation Switch: Switch shall be equipped with an independent engine start circuit. Should a utility outage occur while operating the bypass in normal or isolated modes, the engine will automatically start and allow immediate selection to emergency bypass. 1.3 SUBMITTALS A. Submit product data and shop drawings in accordance with Division 01 and Division 26 Section Common Work Results for Electrical for products specified under PART 2 - PRODUCTS. B. Simultaneous Action Submittals: Transfer Switch Product Data submittal shall be made in conjunction with action submittals required under Division 26 Section Overcurrent Protective Device Coordination Study. The release of electrical equipment submittals (panelboards, engine generators, switchgear, etc.) is dependent on the receipt of a complete and accurate overcurrent protective device coordination study. The Architect and Engineer require a full submittal review period as delineated in Division 01 Section Submittal Procedures to adequately review the OCPD study against the submitted electrical components prior to release of submittals for equipment procurement. The submittal schedule required by Division 01 requirements shall provide for this review time in the action submittal process. Delay claims arising due to Contractor s failure to coordinate simultaneous action submittals will not be considered by the Owner. C. Product Data: For each type of product indicated. Include rated capacities, weights, operating characteristics, furnished specialties, and accessories. 1. Indicate whether the transfer switch withstand and closing rating is based on Three- Cycle Testing or specific coordinated circuit breaker. a. Where a specific circuit breaker rating is used, the submittal data shall include information supporting the actual coordinated rating. Include the withstand and closing rating chart showing the transfer switches respective rating with the specific circuit breaker included in the Work to which the transfer switch is being connected to for this project. Coordinate this with the electrical power distribution equipment manufacturer to determine the actual circuit breaker proposed for inclusion in the Work and submit in conjunction with associated power distribution equipment. D. Shop Drawings: Dimensioned plans, elevations, sections, and details showing minimum clearances, conductor entry provisions, gutter space, installed features and devices, and material lists for each switch specified. 1. Single-Line Diagram: Show connections between transfer switch, bypass/isolation switch, power sources, and load; and show interlocking provisions for each combined transfer switch and bypass/isolation switch. 2. Control schematics and wiring diagrams. E. Coordination Drawings: Submit Coordination Drawings in accordance with Division 26 Section Common Work Results for Electrical for each location where transfer switches are included in the Work

3 F. Specification Compliance Certification: Submit a Specification Compliance Certification in accordance with Division 26 Section Common Work Results for Electrical. G. Source quality-control test reports. H. Extended Maintenance Offer: Priced service contract for Owner s consideration specified in this Section. I. Field quality-control test reports. J. Operation and Maintenance Data: For electrical equipment, accessories and components to be included in emergency, operation, and maintenance manuals. In addition to items specified in Division 01 Section "Operation and Maintenance Data," include the following: 1. Manufacturer's routine maintenance requirements for transfer switch and all installed components. 2. Features and operating sequences, both automatic and manual. 3. List of all factory settings of relays; provide relay-setting and calibration instructions, including software, where applicable. 4. Manufacturer's written instructions for testing and adjusting device settings. 5. Manufacturer's sample system checklists and log sheets. 6. Manufacturer's written instructions for sequence of operation. K. Warranty: Special warranty specified in this Section. 1.4 QUALITY ASSURANCE A. Manufacturer Qualifications: Maintain a service center available on a 24-hour a day, 365 days a year, on-call basis, via a toll-free call center, capable of providing training, parts, and emergency maintenance repairs within a response period of less than eight hours from time of notification. Maintain records of each transfer switch, by serial number, for service purposes. B. Source Limitations: Obtain bypass/isolation switches and remote annunciator and control panels through one source from a single manufacturer. C. 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. D. Comply with NEMA ICS 1. E. Comply with NFPA 70. F. Comply with NFPA 99. G. Comply with NFPA 110. H. Comply with UL 1008, unless requirements of these Specifications are stricter. 1. During the UL 1008 withstand and closing tests, there shall be no contact welding or damage. 2. The test shall verify that contacts separation has not occurred, and there is contact continuity across all phases. 3. The tests shall be performed without the use of current limiting fuses. 4. Where switch is coordinated with current limiting fuses, the switch shall have withstand and closing current ratings of 200,000 amperes at 480V. Use of current limiting fuses in

4 coordination with a switch is only acceptable if specifically designed as such and indicated on the Drawings. 5. Where switch is coordinated with current limiting circuit breakers, the switch shall have greater withstand and closing current ratings, from 85,000 amperes to 200,000 amperes at 480V, depending on switch size. Use of current limiting circuit breakers in coordination with a switch is only acceptable if specifically designed as such and indicated on the Drawings. 6. Where conducting temperature rise tests to UL-1008, include post-endurance temperature rise tests to verify the ability of the transfer switches to carry full rated current after completing the overload and endurance tests. 1.5 DELIVERY, STORAGE, AND HANDLING A. Prepare equipment for shipment. 1. Provide suitable crating, blocking, and supports so equipment will withstand expected domestic shipping and handling shocks and vibration. 2. Weatherproof equipment for shipment. Close connection openings to prevent entrance of foreign material during shipment and storage. B. Installation Pathway: Coordinate delivery of equipment to allow movement into designated space. 1. Deliver in shipping splits in sizes that can be moved past obstructions in delivery path. 2. Remove and replace access fencing, doors, lift-out panels, and structures to provide pathway for moving equipment into place. C. Store equipment indoors in clean dry space with uniform temperature in accordance with manufacturer s requirements to prevent condensation. Protect equipment from exposure to dirt, fumes, water, corrosive substances, and physical damage. D. Handle equipment components according to manufacturer's written instructions. Use factoryinstalled lifting provisions. E. Environmental Limitations: 1. Rate equipment for continuous operation under the following conditions, unless otherwise indicated: a. Ambient Temperature for Micro-Processor Based controls: Not less than 68 deg F (20 deg C) and not exceeding 104 deg F (40 deg C). b. Ambient Humidity for Micro-Processor Based controls: Zero percent to 99 percent relative humidity, non-condensing. c. Altitude: Not exceeding 6600 feet (2000 m). 1.6 COORDINATION A. Coordinate layout and installation of transfer switches and components with other construction that penetrates walls or is supported by them, including but not limited to electrical and other types of equipment, raceways, piping, and encumbrances to workspace clearance requirements. B. Coordinate size and location of concrete bases for floor mounted units. Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork requirements are specified in Division

5 1.7 WARRANTY A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of switchgear and associated auxiliary components that fail in materials or workmanship within specified warranty period. 1. Warranty Period: Two years from date of Substantial Completion. 1.8 MAINTENANCE SERVICE A. Initial Maintenance Service: Beginning at Substantial Completion, provide full inspection and maintenance by skilled employees of manufacturer's designated service organization during the Warranty period, including any special warranty period specified. 1. Include routine preventive maintenance and adjusting as required for proper operation as recommended by manufacturer. Provide number of visits recommended by manufacturer; but no less than semi-annual inspection service. 2. Provide parts and supplies same as those used in the manufacture and installation of the original equipment. 3. The contractor performing the contract services shall be qualified and listed to maintain ongoing certification and listing of the completed system. B. Extended Maintenance Service: Offer for the Owner s consideration and evaluation at the time of Product Data Submittal, a priced inspection, maintenance, testing, and repair contract in compliance with the manufacturer s recommended routine preventive maintenance program. 1. The services offered under this contract shall begin after the completion of the Initial Maintenance Service and Special Warranty Period. 2. The Owner shall have the option of renewing for single or multiple years, up to five years, at the price quoted upon completion of the Warranty period. 3. The contractor performing the contract services shall be qualified and listed to maintain ongoing certification and listing of the completed system. PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Basis-of-Design Product: Subject to compliance with requirements, provide Emerson; ASCO Power Technologies, LP; Series 7000 or a comparable product by one of the following: 1. Contactor Transfer Switches: a. Caterpillar; Engine Div; Series CTS / CBTS. b. GE Zenith Controls; Series ZTS / ZBTS. c. Kohler Power Systems; Generator Division;. d. Onan/Cummins Power Generation; Industrial Business Group; Series OTPC / BTPC. e. Russelectric, Inc; Series RMTD with Model 2000 Plus Control. 2.2 GENERAL TRANSFER-SWITCH PRODUCT REQUIREMENTS A. Indicated Current Ratings: Apply as defined in UL 1008 for continuous loading and total system transfer, including tungsten filament lamp loads not exceeding 30 percent of switch ampere rating, unless otherwise indicated

6 B. Tested Fault-Current Closing and Withstand Ratings: Adequate for duty imposed by protective devices at installation locations in Project under the fault conditions indicated, based on testing according to UL Where transfer switch includes internal fault-current protection, rating of switch and trip unit combination shall exceed indicated fault-current value at installation location. C. Solid-State Controls: Repetitive accuracy of all settings shall be plus or minus 2 percent or better over an operating temperature range of minus 20 to plus 70 deg C and 0 to 99 percent relative humidity, non-condensing. D. Resistance to Damage by Voltage Transients: Components shall meet or exceed voltage-surge withstand capability requirements when tested according to IEEE C Components shall meet or exceed voltage-impulse withstand test of NEMA ICS 1. Micro-Processor capable of withstanding surges in accordance with ANSI/IEEE C-37.90A E. Electrical Operation: Accomplish by a nonfused, momentarily energized solenoid or electricmotor-operated mechanism, mechanically and electrically interlocked in both directions. F. Switch Characteristics: Designed for continuous-duty repetitive transfer of full-rated current between active power sources. 1. Limitation: Switches using molded-case switches or circuit breakers or insulated-case circuit-breaker components are not acceptable. 2. Switch Action: Double throw; mechanically held in both directions. 3. Contacts: Silver composition or silver alloy for load-current switching. Conventional automatic transfer-switch units, rated 225 A and higher, shall have separate arcing contacts. G. Neutral Switching: Where four-pole switches are indicated, provide neutral pole switched simultaneously with phase poles. H. Lugs: Mechanical style, one or two hole style to suit conditions, suitable for quantity annd size of conductor, dual rated for use with copper- or aluminum conductors; UL 486 B listed, marked AL7CU for 75 degrees C rated circuits and AL9CU for 90 degrees C rated circuits. I. Annunciation, Control, and Programming Interface Components: Devices at transfer switches for communicating with remote programming devices, annunciators, or annunciator and control panels shall have communication capability matched with remote device. J. Factory Wiring: Train and bundle factory wiring and label, consistent with Shop Drawings, either by color-code or by numbered or lettered wire and cable tape markers at terminations. Color-coding and wire and cable tape markers are specified in Division 26 Section "Identification for Electrical Systems." 1. Designated Terminals: Pressure type, suitable for types and sizes of field wiring indicated. 2. Power-Terminal Arrangement and Field-Wiring Space: Suitable for top, side, or bottom entrance of feeder conductors as required to meet field conditions. 3. Control Wiring: a. Equipped with lugs suitable for connection to terminal strips. b. Wire auxiliary contacts to terminal strips. 2.3 ENCLOSURES A. NEMA ICS 6 and UL 508 to meet environmental conditions of installed location as follows, unless otherwise indicated:

7 1. Indoor Locations: NEMA 250, Type AUTOMATIC A. Comply with Level 1 equipment according to NFPA 110. B. Manual Switch Operation: Unloaded. Control circuit automatically disconnects from electrical operator during manual operation. C. Signal-Before-Transfer Contacts: Two sets of normally open/normally closed dry contacts operates in advance of retransfer to normal source. Interval is adjustable from 1 to 300 seconds. D. Digital Communication Interface: Matched to capability of remote annunciator or annunciator and control panel. E. Automatic Transfer Switches using In-Phase Monitor: Factory-wired, internal relay controls transfer so it occurs only when the two sources are synchronized in phase. Relay compares phase relationship and frequency difference between normal and emergency sources and initiates transfer when both sources are within 15 electrical degrees, and only if transfer can be completed within 60 electrical degrees. Transfer is initiated only if both sources are within 2 Hz of nominal frequency and 70 percent or more of nominal voltage. F. Automatic Transfer-Switch Features: 1. Undervoltage Sensing for Each Phase of Normal Source: Sense low phase-to-ground voltage on each phase. Pickup voltage shall be adjustable from 85 to 100 percent of nominal, and dropout voltage is adjustable from 75 to 98 percent of pickup value. Factory set for pickup at 90 percent and dropout at 85 percent. 2. Overvoltage Sensing for Each Phase of Normal Source: Sense high phase-to-ground voltage on each phase. Pickup shall be adjustable from 110 to 120 percent of nominal, and dropout voltage is adjustable from 75 to 98 percent of pickup value. Factory set for pickup at 120 percent and dropout at 110 percent. 3. Under-frequency Sensing of Normal Source: Sense low frequency. Pickup frequency shall be adjustable from 85 to 100 percent of nominal, and dropout voltage is adjustable from 75 to 98 percent of pickup value. Factory set for pickup at 95 percent and dropout at 90 percent. 4. Over-frequency Sensing of Normal Source: Sense high frequency. Pickup frequency shall be adjustable from 105 to 120 percent of nominal, and dropout voltage is adjustable from 75 to 98 percent of pickup value. Factory set for pickup at 110 percent and dropout at 105 percent. 5. Adjustable Time Delay: For override of normal-source voltage sensing to delay transfer and engine start signals. Adjustable from zero to six seconds, and factory set for one second. 6. Voltage/Frequency Lockout Relay: Prevent premature transfer to generator. Pickup voltage shall be adjustable from 85 to 100 percent of nominal. Factory set for pickup at 90 percent. Pickup frequency shall be adjustable from 90 to 100 percent of nominal. Factory set for pickup at 95 percent. 7. Commit/No-Commit Option: Selectable setting to select either "commit" or "no commit" to transfer operation in the event of a normal power failure. a. In the commit position the load will transfer to the emergency source after any normal power failure. b. In the no commit position, the load will transfer to the emergency position unless normal power returns before the emergency source has reach 90-percent of it's rated values (switch will remain in normal)

8 8. Time Delay for Retransfer to Normal Source: Adjustable from 0 to 30 minutes, and factory set for 10 minutes to automatically defeat delay on loss of voltage or sustained undervoltage of emergency source, provided normal supply has been restored. 9. Local Test Switch: Simulate normal-source failure. 10. Switch-Position Pilot Lights: Indicate source to which load is connected. 11. Source-Available Indicating Lights: Supervise sources via transfer-switch normal- and emergency-source sensing circuits. a. Normal Power Supervision: Green light with nameplate engraved "Normal Source Available." b. Emergency Power Supervision: Red light with nameplate engraved "Emergency Source Available." 12. Unassigned Auxiliary Contacts: Two sets of normally open/normally closed dry contacts, single-pole, double-throw contacts for each switch position, rated 10 A at 240-V ac. 13. Transfer Override Switch: Overrides automatic retransfer control so automatic transfer switch will remain connected to emergency power source regardless of condition of normal source. Pilot light indicates override status. 14. Engine Starting Contacts: One isolated and normally closed, and one isolated and normally open; rated 10 A at 32-V dc minimum. 15. Engine Shutdown Contacts: Time delay adjustable from zero to five minutes, and factory set for five minutes. Contacts shall initiate shutdown at remote engine-generator controls after retransfer of load to normal source. 16. Engine-Generator Exerciser: Solid-state, programmable-time switch starts engine generator and transfers load to it from normal source for a preset time, then retransfers and shuts down engine after a preset cool-down period. Initiates exercise cycle at preset intervals adjustable from 7 to 30 days. Running periods are adjustable from 10 to 30 minutes. Factory settings are for 7-day exercise cycle, 20-minute running period, and 5- minute cool-down period. Exerciser features include the following: a. Exerciser Transfer Selector Switch: Permits selection of exercise with and without load transfer. b. Push-button programming control with digital display of settings. c. Integral battery operation of time switch when normal control power is not available. 2.5 BYPASS/ISOLATION SWITCHES A. Comply with requirements for Level 1 equipment according to NFPA 110. B. Description: Manual type, arranged to select and connect either source of power directly to load, isolating transfer switch from load and from both power sources. Include the following features for each combined automatic transfer switch and bypass/isolation switch: 1. Means to lock bypass/isolation switch in the position that isolates transfer switch with an arrangement that permits complete electrical testing of transfer switch while isolated. While isolated, interlocks prevent transfer-switch operation, except for testing or maintenance. 2. Drawout Arrangement for Transfer Switch: Provide physical separation from live parts and accessibility for testing and maintenance operations. 3. Bypass/Isolation Switch Current, Voltage, Closing, and Short-Circuit Withstand Ratings: Equal to or greater than those of associated automatic transfer switch, and with same phase arrangement and number of poles. 4. Contact temperatures of bypass/isolation switches shall not exceed those of automatic transfer-switch contacts when they are carrying rated load. 5. Operability: Constructed so load bypass and transfer-switch isolation can be performed by 1 person in no more than 2 operations in 15 seconds or less. 6. Legend: Manufacturer's standard legend for control labels and instruction signs shall describe operating instructions

9 7. Maintainability: Fabricate to allow convenient removal of major components from front without removing other parts or main power conductors. 8. No Load Break: Switch constructed so load bypass and transfer-switch isolation can be performed without interruption to load. C. Interconnection of Bypass/Isolation Switches with Automatic Transfer Switches: Factoryinstalled copper bus bars; plated at connection points and braced for the indicated available short-circuit current. 2.6 REMOTE ANNUNCIATOR SYSTEM A. Functional Description: Remote annunciator panel shall annunciate conditions for indicated transfer switches. Annunciation shall include the following: 1. Sources available, as defined by actual pickup and dropout settings of transfer-switch controls. 2. Switch position. 3. Switch in test mode. 4. Failure of communication link. 5. Switch in Manual/Override. B. Annunciator Panel: LED-lamp type with audible signal and silencing switch. 1. Indicating Lights: Grouped for each transfer switch monitored. 2. Label each group, indicating transfer switch it monitors, location of switch, and identity of load it serves. 3. Mounting: Flush, modular, steel cabinet, unless otherwise indicated. 4. Lamp Test: Push-to-test or lamp-test switch on front panel. 2.7 SOURCE QUALITY CONTROL A. Factory test and inspect components, assembled switches, and associated equipment. Ensure proper operation. Check transfer time and voltage, frequency, and time-delay settings for compliance with specified requirements. Perform dielectric strength test complying with NEMA ICS 1. Submit written test results. PART 3 - EXECUTION 3.1 APPLICATION A. Transfer Switches: Apply switch products as specified below, unless otherwise indicated: 1. Life Safety Branch: Automatic, Open Transition, with bypass isolation. 2. Critical Branch: Automatic, Open Transition, with bypass isolation. 3. Equipment Emergency System: Automatic, Open Transition, with bypass isolation. B. Remote Annunciator Panel Locations: Provide annunciator panels in the following locations, unless otherwise indicated: 1. Locations as indicated on the Drawings. 3.2 INSTALLATION A. Floor-Mounting Switch: Support on Concrete base and anchor to floor by bolting

10 1. Concrete Bases: 4 inches (100 mm) high, reinforced, with chamfered edges. Extend base no more than 4 inches (100 mm) in all directions beyond the maximum dimensions of switch, unless otherwise indicated. Construct concrete bases according to Division 26 Section "Hangers and Supports for Electrical Systems." B. Annunciator and Control Panel Mounting: Flush in wall, unless otherwise indicated. 3.3 CONNECTIONS A. Wiring to Remote Components: Match type and number of cables and conductors to control and communication requirements of transfer switches as recommended by manufacturer. Increase raceway sizes at no additional cost to Owner if necessary to accommodate required wiring. B. Connect start signal and other necessary wiring to Engine Generator control system; coordinate requirements with Division 26 Section "Engine Generators". Each Automatic transfer switch shall have dedicated control wiring homerun to generator start control. Do not daisy-chain control wiring between switches. C. Connect relay wiring to Elevator controller; coordinate requirements with Division 14 Conveying Equipment. D. Ground equipment according to Division 26 Section "Grounding and Bonding for Electrical Systems." E. Connect wiring according to Division 26 Section "Low-Voltage Electrical Power Conductors and Cables." 3.4 IDENTIFICATION A. Identify components according to Division 26 Section "Identification for Electrical Systems." B. Affix a label with a toll-free telephone number for contacting emergency maintenance field service to front of each switch. 3.5 FIELD QUALITY CONTROL A. Prepare for acceptance tests as follows: 1. Test insulation resistance for each transfer switch bus, component, connecting supply, feeder, and control circuit. 2. Test continuity of each circuit. 3. Coordinate tests with tests of generator and run them concurrently. B. Manufacturer's Field Service: Engage a factory-authorized service representative to perform the following field tests and inspections and prepare certified test reports: 1. After installing equipment and after electrical circuitry has been energized, test for compliance with requirements. 2. Perform each electrical test, visual and mechanical inspection, and operational test stated in NETA ATS, Sections as appropriate. Certify compliance with test parameters. 3. Measure insulation resistance phase-to-phase and phase-to-ground with insulationresistance tester. Include external annunciation and control circuits. Use test voltages

11 and procedure recommended by manufacturer. Comply with manufacturer's specified minimum resistance. a. Check for electrical continuity of circuits and for short circuits. b. Inspect for physical damage, proper installation and connection, and integrity of barriers, covers, and safety features. c. Verify that manual transfer warnings are properly placed. d. Perform manual transfer operation. 4. After energizing circuits, demonstrate interlocking sequence and operational function for each switch at least three times. a. Simulate power failures of normal source to automatic transfer switches and of emergency source with normal source available. b. Simulate loss of phase-to-ground voltage for each phase of normal source. c. Verify time-delay settings. d. Verify pickup and dropout voltages by data readout or inspection of control settings. e. Test bypass/isolation unit functional modes and related automatic transfer-switch operations. f. Perform contact-resistance test across main contacts and correct values exceeding 500 microhms and values for 1 pole deviating by more than 50 percent from other poles. g. Verify proper sequence and correct timing of automatic engine starting, transfer time delay, retransfer time delay on restoration of normal power, and engine cooldown and shutdown. 5. Ground-Fault Tests: Coordinate with testing of ground-fault protective devices for power delivery from both sources. a. Verify grounding connections and locations and ratings of sensors. 6. Record adjustable relay settings and measured insulation and contact resistances and time delays. 7. Infrared Scanning: Perform Thermographic Survey in accordance with NETA ATS, Section 9.0. a. Initial Infrared Scanning: Within 60 Days after Substantial Completion, perform an infrared scan of each switch. Open or remove doors and covers so connections are accessible to portable scanner. b. Instruments, Equipment: 1) Use an infrared scanning device designed to measure temperature or to detect significant deviations from normal values. Provide calibration record for device. C. Correct Deficiencies and Report: 1. Correct unsatisfactory conditions, and retest to demonstrate compliance; replace switches, relays, conductors, units, and devices as required to bring system into compliance. 2. Correct malfunctioning units on-site, where possible, and retest to demonstrate compliance; otherwise, replace with new units and retest. 3. Prepare a report that identifies switch, connection, conductors and devices checked and describes results. Include notation of deficiencies detected, remedial action taken, and observations and test results after remedial action. D. Test Labeling: On completion of satisfactory testing of each unit, attach a dated and signed "Satisfactory Test" label to tested component. 3.6 ADJUSTING A. Set field-adjustable intervals and delays, relays, and engine exerciser clock. Set delays as indicated below

12 Time Delay Transfer to Emergency (Sec) ATS Name Priority Level Load Shed Function ATS-LS 1 NO ATS-CR 1 NO ATS-EQ 2 NO Time Delay Retransfer to Normal Power (Sec) 3.7 CLEANING A. Clean components according to manufacturer's written instructions. B. Prior to installation of front trim and cover plates inspect interior surfaces and perform the following: 1. Remove paint splatters and other spots. 2. Vacuum dirt and debris; do not use compressed air to assist in cleaning. C. On completion of front trim and cover installation, inspect exterior surfaces and perform the following: 1. Remove paint splatters and other spots. 2. Remove all temporary markings and labels. 3. Vacuum dirt and debris; do not use compressed air to assist in cleaning. 4. Repair exposed surfaces to match original finish. 3.8 PROTECTION A. Temporary Heating: Maintain a clean dry space with uniform temperature in accordance with manufacturer s requirements to prevent condensation. Apply temporary heating as required. B. Protect equipment from exposure to dirt, fumes, water, corrosive substances, and physical damage. 3.9 DEMONSTRATION A. Engage a factory-authorized service representative to train Owner's personnel to adjust, operate, and maintain transfer switches and related equipment as specified below. Refer to Division 01 Section "Demonstration and Training." B. Coordinate this training with that for generator equipment. END OF SECTION