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CLOSED TRANSITION SOFT LOAD TRANSFER SWITCHES – LOW VOLTAGE SECTION 16496F SECTION 16496F CLOSED TRANSITION SOFT LOAD TRANSFER SWITCHES – LOW VOLTAGE PART 1 GENERAL 1.01 SCOPE A. Furnish and install the low voltage automatic transfer switches having the ratings, features/accessories and enclosures as specified herein and as shown on the contract drawings. 1.02 RELATED SECTIONS 1.03 REFERENCES A. The automatic transfer switches and all components shall be designed, manufactured and tested in accordance with the latest applicable standards of UL and NEMA as follows: 1.UL 1008 – Transfer Switches (File E38116) 2.UL 991 – Test for Controls Employing Solid State Devices 3.UL 1066 – Power Circuit Breakers 4.NFPA 70 & 76A – National Electrical Code 5.NFPA 99 – Essential Electrical Systems of Health Care Facilities 6.NFPA 110 – Emergency and Standby Power Systems 7.NEMA ICS 10 – AC Transfer Switch Equipment 8.IEEE 446 – Recommended Practice for Emergency and Standby Power Systems 9.IEC 801-2, 3, 4, and 5 10.CISPR 11 11.Compliant with FCC Part 15, Subpart B, Class A. 1.04 SUBMITTALS – FOR REVIEW/APPROVAL A. The following information shall be submitted to the Engineer: 1. Master drawing index 2. Front view and plan view of the assembly 3. Schematic diagram 4. Nameplate schedule 5. Component list 6. Conduit space locations within the assembly. 16496F-1 06/24/10 Note to Spec Writer: { } Denotes EATON Feature reference number

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16496F

CLOSED TRANSITION SOFT LOAD transfer switches low voltage

Section 16496f

section 16496F

CLOSED TRANSITION SOFT LOAD transfer switches low voltage

PART 1 General

1.01 scope

A. Furnish and install the low voltage automatic transfer switches having the ratings, features/accessories and enclosures as specified herein and as shown on the contract drawings.

1.02 Related Sections

1.03 References

A. The automatic transfer switches and all components shall be designed, manufactured and tested in accordance with the latest applicable standards of UL and NEMA as follows:

1. UL 1008 Transfer Switches (File E38116)

2. UL 991 Test for Controls Employing Solid State Devices

3. UL 1066 Power Circuit Breakers

4. NFPA 70 & 76A National Electrical Code

5. NFPA 99 Essential Electrical Systems of Health Care Facilities

6. NFPA 110 Emergency and Standby Power Systems

7. NEMA ICS 10 AC Transfer Switch Equipment

8. IEEE 446 Recommended Practice for Emergency and Standby Power Systems

9. IEC 801-2, 3, 4, and 5

10. CISPR 11

11. Compliant with FCC Part 15, Subpart B, Class A.

1.04 Submittals for Review/approval

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

1. Master drawing index

2. Front view and plan view of the assembly

3. Schematic diagram

4. Nameplate schedule

5. Component list

6. Conduit space locations within the assembly.

7. Assembly ratings including:

a. Short-circuit rating

b. Voltage

c. Continuous current rating.

8. Major component ratings including:

a. Voltage

b. Continuous current rating

c. Interrupting ratings

9. Cable terminal sizes

10. Product Data Sheets.

B. Where applicable, the following additional information shall be submitted to the Engineer:

1. Busway connection

2. Connection details between close-coupled assemblies

3. Composite front view and plan view of close-coupled assemblies

4. Key interlock schematic drawing and sequence of operations

5. Mimic bus.

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 section 1.04

2. Wiring diagrams

3. Certified production test reports

4. Installation information

5. Seismic certification as specified

B. The final (as-built) drawings shall include the same drawings as the construction drawings and shall incorporate all changes made during the manufacturing process.

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.D. (Provide Seismic tested equipment as follows {42}:

Note to Spec. Writer:

To help understand the 2006 IBC/2007 CBC seismic parameters for a specific location, the attached link to the US Geological Survey will be extremely helpful:http://earthquake.usgs.gov/research/hazmaps/design/Download the file Java Ground Motion Parameter Calculator - Version 5.0.8 (4.6 MB) and save it to your hard drive, then run the executable (.exe) that was downloaded.

Enter the latitude and longitude of your project location.

(To find exact Latitude and Longitude, go to http://geocoder.us/ and type in the address.)

The IBC seismic criteria for that location will then be displayed. It is simply a matter of verifying that the criteria shown for your specific building location is.1. The equipment and major components shall be suitable for and certified by actual seismic testing to meet all applicable seismic requirements of the 2006 International Building Code (IBC) Site Classification [Enter classification from above website]. The site coefficients Fa = [Enter value from above website], and spectral response accelerations of SS = [Enter value from above website]g, S1 = [Enter value from above website]g are used. The test response spectrum shall be based upon a 5% damping factor, and a peak (SDS) of at least [Enter value from above website]gs (3 -12 Hz) applied at the base of the equipment in the horizontal direction. The forces in the vertical direction shall be at least 66% of those in the horizontal direction. The tests shall cover a frequency range from 1 to 100Hz. Guidelines for the installation consistent with these requirements shall be provided by the equipment manufacturer and based upon testing of representative equipment. Equipment certification acceptance criteria shall be based upon the ability for the equipment to be returned to service immediately after a seismic event within the above requirements without the need for repairs.

-- (OR --

1. The manufacturer shall certify the equipment based upon a dynamic and/or static structural computer analysis of the entire assembly structure and its components, provided it is based upon actual seismic testing from similar equipment. The analysis shall be based upon all applicable seismic requirements of the 2006 International Building Code (IBC) Site Classification [Enter classification from above website], site Coefficient Fa = [Enter classification from above website], FV = [Enter classification from above website] and spectral response accelerations of SS = [Enter classification from above website]g, S1 = [Enter classification from above website]g. The analysis shall be based upon a 5% damping factor, and a peak (SDS) of at least [Enter classification from above website]gs (3 -12 Hz), applied at the base of the equipment in the horizontal direction. The forces in the vertical direction shall be at least 66% of those in the horizontal direction. The analysis shall cover a frequency range from 1 to 100Hz. Guidelines for the installation consistent with these requirements shall be provided by the equipment manufacture and based upon testing of representative equipment. Equipment certification acceptance criteria shall be based upon the ability for the equipment to be returned to service immediately after a seismic event within the above requirements without the need for repairs.

2. The following minimum mounting and installation guidelines shall be met, unless specifically modified by the above referenced standards.

a. The Contractor shall provide equipment anchorage details, coordinated with the equipment mounting provision, prepared and stamped by a licensed civil engineer in the state. Mounting recommendations shall be provided by the manufacturer based upon the above criteria to verify the seismic design of the equipment.

b. The equipment manufacturer shall certify that the equipment can withstand, that is, function following the seismic event, including both vertical and lateral required response spectra as specified in above codes.

c. The equipment manufacturer shall document the requirements necessary for proper seismic mounting of the equipment. Seismic qualification shall be considered achieved when the capability of the equipment, meets or exceeds the specified response spectra.1.07 regulatory requirements

A. Provide a certificate of compliance with UL 1008 for the transfer switches furnished under this section.

1.08 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.

1.09 Field measurements

1.010 operation and maintenance manuals

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

1.011 Extra products

PART 2 products

2.01 manufacturers

A. Eaton / Cutler-Hammer products

B. (__________

C. (__________

The listing of specific manufacturers above does not imply acceptance of their 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 RaTINGSNote to Spec Writer: Select from the table below to fill in the data required for 2.02 A

TABLE 16496f-1

Standard UL1008 3 CycleRating When Used With30 Cycle Extended Rating

Upstream Circuit Breaker (kA)Ratings When Used for

Transfer SwitchCoordination with Upstream

Ampere RatingBreakers with Short Time Rating

120 600 VAC120 600 VAC

80010085

100010085

120010085

160010085

200010085

250010085

320010085

A. The transfer switch shall have a 3 cycle withstand; closing and interrupting ratings of (________ kAIC at (_______ volts.

-- (OR --

A.The transfer switch shall have a (______ 30 second withstand; closing and interrupting ratings of (_______ kAIC at (_______ volts.

B. The transfer switch shall be 100% equipment rated for continuous duty.

C. The voltage rating of the transfer switch shall be no less than the system voltage rating. The continuous current rating of the transfer switch shall be no less than the maximum continuous current requirements of the system.

D. The transfer switch shall be 100% equipment rated for continuous duty as shown on the drawings and shall conform to the applicable requirements of UL 1008 for emergency system total load.

E. The automatic transfer switches shall be fully rated to protect all types of loads, inductive and resistive, from loss of continuity of power, without derating, either open or enclosed.

2.03 construction

A. Switches rated 800-3200 Amps shall be Floor Mounted construction.

B. The switching panel shall consist of completely enclosed contact assemblies and a separate control logic panel. Control power for all transfer operations shall be derived from the line side of the source to which the load is being transferred.

C. Transfer switches shall be capable of being operated manually under full rated load conditions. Manual operation shall be accomplished by a permanently attached manual operator, or by integrally mounted pushbuttons. Removable manual operating handles, and handles that may move in the event of an electrical operation during the manual operation, are not acceptable. Manual operators requiring source or load disconnection prior to manual operation are not acceptable.

D. On transfer switches requiring a fourth pole for switching the neutral, the neutral shall be fully rated with equal withstand, closing and interrupting ratings to the power poles. Switched neutral poles which are add-on or overlap, or that are not capable of breaking full rated load current are not acceptable.

E. The transfer switch shall have a multi-tap voltage selection plug for ease of voltage adjustment in the field.

F. Doors shall be equipped with four hinges, regardless of switch size to insure proper support of the door and door-mounted devices. The hinges shall have removable hinge pins to facilitate door removal. The doors shall have thumbscrew and padlock latches.

G. (Where shown on the drawings, transfer switches applied as service entrance equipment shall be provided with over-current trip units {16} and a service entrance label {37}. An external key-operated selector switch {38A} shall be provided to disconnect the power supplies. Indicators shall be provided to show the availability of each source as well as breakers in a tripped or disconnected position {12}. Provide a neutral disconnect link for three-pole solid neutral switches, and a neutral-to-ground main bonding jumper for all switches to meet UL service entrance requirements. Ground fault protection shall be provided for all switches rated 1000 amperes or more applied on 480Y/277V AC systems in accordance with NEC Article 230-95 {37}.

H. (Where indicated on the drawings, the transfer switches shall be provided with a draw-out mechanism to allow easy access for preventive maintenance, testing or inspection. The draw-out mechanism shall provide visual indicators as to the position of the switch/breaker during the draw-out operation.

2.04 microprocessor logic

A. The transfer switch shall be equal to a Cutler-Hammer ATC-5000 type microprocessor-based controller. The controller shall be hardened against potential problems from transients and surges. Operation of the transfer switch and monitoring of both sources shall be managed by the controller.

B. The microprocessor-based logic controller shall be door mounted and shall provide the operator with an overview of the transfer switch status, parameters, and diagnostic data. The controller shall be designed for closed transition make-before-break transfer switch applications. The closed transition operation requires that both power sources shall be synchronized in voltage, frequency, and phase angle within prescribed limits. The controller shall have a voltage range of 50-480 volts (50/60 Hz). The controller shall have a frequency range of 40-70 Hz. Control power input range shall be from 9.5 to 32-VDC. Ambient operating temperature between 20 and +65 C Degrees (-4 and +149 F Degrees). The controller shall be listed under UL Standard 1008 and shall be Cutler-Hammer type ATC-5000 or approved equal.

C. The microprocessor-based controller shall include an integrated LED display, and shall contain the following features and display the following information:

1. True RMS Sensing

2. Frequency and voltage Bias Outputs for Generator set(s)

3. Protective Relays

a. Device 25A Synchronizer

b. Device 59/27Over/Under Voltage for Generator Set and Utility Tie

c. Device 81 Over/Under Frequency for Generator Set and Utility Tie

d. Device 78 Phase/Vector Shift for the Utility Tie

e. Device 32/32R Overload/Reverse Power for the Generator Set

f. Device 46 Load Imbalance for the Generator Set

g. Device 50/51 Over-Current for the Generator

4. Load Management

a. Automatic Base Load/Peak Shaving

b. Import / Export Power Control

5. Automatic Start / Stop Sequencing for Gas and Diesel Engines

6. Load Dependent Start/Stop

7. Real Power / PF Control

8. Counters for kWH, Engine Starts, Operating Hours and Maintenance

9. Help function for detailed description of displayed messages

10. Language Manager

11. Event Logging

12. Multi-Password Protection

13. Battery Voltage Monitoring

14. Shall be capable of communicating over a ([CAN bus] [(________ network] to monitor all set points and operational characteristics.

D. The microprocessor-based controller shall include the following Switching Device Status Lights:

1. Source #1 OPEN (Green)

2. Source #1 CLOSED (Red)

3. Source #1 TRIP (Amber)

4. Source #2 OPEN (Green)

5. Source #2 CLOSED (Red)

6. Source #2 TRIP (Amber)

E. The microprocessor-based controller shall include the following Control Switches and Lights:

1. AUTO/TEST Switch

2. SYSTEM TEST Switch

3. TEST MODE Switch

4. ALARM SILENCE Switch

5. READY FOR OPERATION Lamp (White) to verify Controller status

F. The microprocessor-based controller shall include Freely Configurable Discrete and Analog Alarm Inputs:

1. Discrete Inputs (Isolated)

a. Input Range: 12/24 Vdc (6 to 32 Vdc)

b. Input Resistance: Approx 6.8k ohms

2. Analog Inputs (Freely Scalable)

a. Type: 0/4 to 20-ma, Pt100, VDO

b. Resolution: 10 bit

G. The microprocessor-based controller shall include Freely Configurable Relay and Analog Outputs

1. Relay Outputs (Potential Free)

a. Contact Material: AgCdO

b. Load (GP): 2-Amps @ 250-Vac; 2-Amps @ 24-VDC; 0.36-Amps @ 125-Vdc; 0.18-Amps @ 250-Vdc

c. Pilot Duty (PD): 1-Amp @ 24-Vdc; 0.22-Amps 125-Vdc; 0.10-Amp @ 250-Vdc

2. Analog Outputs (Isolated)

a. Type: Type: 0/4 to 20-ma; Freely Scalable

b. 8 / 12 bit (depending on model)

c. Maximum load 0/4 to 20-ma: 500 ohm

d. Insulating Voltage: 1,500-Vdc

H. The microprocessor-based controller shall contain the following time delay features:

1. A time delay shall be provided on transfer to EMERGENCY source, adjustable from 0 to 1800 seconds. TDNE Time Delay Normal to Emergency {1}

2. A time delay shall be provided to override a momentary power outage or voltage fluctuation, adjustable from 0 to 120 seconds. TDES Time Delay engine Start {2}

3. A time delay shall be provided on retransfer from EMERGENCY source to NORMAL source, adjustable from 0 to 1800 seconds. TDEN Time Delay Emergency to Normal {3}

4. A time delay shall be provided after retransfer that allows the generator to run unloaded prior to shutdown, adjustable form 0 to 1800 seconds. TDEC Time Delay Engine Cool down {4}

5. A time delay shall be provided for engine failure to start, fixed setting of 6 seconds. TDEF Time Delay Engine Fail {7}

6. A time delay shall be provided for the neutral position, adjustable from 0 to 120 seconds. {32A}

7. (A Load Voltage Decay transition (adjustable 2 30% of Nominal) which shall, after opening the switch from the original source, hold in a neutral position until the voltage on the load is less than 30% of rated voltage. {32B}

8. (An In-Phase Monitor transition, which will permit a transfer or re-transfer between the NORMAL and EMERGENCY sources that have a phase angle difference of 8 degrees or less. Feature to include a permissible frequency difference and synchronization time set points of 1-60 minutes. The adjustable frequency difference shall be 0.00 to 3.0 Hz {32C with Default to Load Voltage Decay or 32D with Default to Time Delay Neutral}

9. (Provide a closed transition transfer as the primary transfer mode. In the event Source 1 and Source 2 fail to synchronize within the permitted voltage difference, frequency difference, phase angle difference and time then the controller defaults to the In-Phase Transition With Default to Load Voltage Decay operation as described in 2.06.F-7 {32B} and 2.06F-8 {32C}. Adjustable Frequency Difference 0.0 0.3 Hz. Adjustable Voltage Difference 1 5 percent. Adjustable synchronization Time Allowance 1 60 Minute {47C}

-- (OR --

9. Provide a closed transition transfer as the primary transfer mode. Only under a failsafe condition (i.e. loss of the connected source) will the controller transfer to the alternate source using the Load Voltage Decay operation as described in 2.06.F-7 {32B}. Adjustable Frequency Difference 0.0 0.3 Hz. Adjustable Voltage Difference 1 5 percent. {47D}

-- (OR --

9. Provide a closed transition transfer as the primary transfer mode. In the event Source 1 and Source 2 fail to synchronize within the permitted voltage difference, frequency difference, phase angle difference and time then the controller defaults to the In-Phase Transition With Default to Time Delay Neutral operation as described in 2.06.F-6 {32A}. Adjustable Frequency Difference 0.0 0.3 Hz. Adjustable Voltage Difference 1 5 percent. Adjustable synchronization Time Allowance 1 60 Minutes. {47E}

10. All delays shall be field adjustable from the microprocessor-based controller without the use of special tools.

I. The microprocessor-based controller shall contain the following features:

1. AUTO, MANUAL Start/Stop, TEST, STOP, RESET sof-membrane pushbuttons

2. Plant exerciser, selectable 7-day interval, adjustable 0-600 minutes, load or no-load with Failsafe {23J}

3. Bypass Time Delay Emergency to Normal (TDEN) Pushbutton {8C}

4. Bypass Time Delay Normal to Emergency (TDNE) Pushbutton {8D}

5. (Maintenance Electrical Operator Isolator Switch. Provide a 2-Position Selector Switch, maintained contact, marked: OPERATE and DISABLE. {9B}

6. A programmable Preferred Source Selector with LED light indication for Utility to Utility or Utility to Generator systems {10B}

7. A programmable Preferred Source Selector with LED light indication for Generator to Generator systems. Provides dual engine starting circuits {10D}

8. (Additional NORMAL Source Tripped pilot lights {12L} (Requires Feature 16N)

9. (Additional EMERGENCY Source Tripped pilot lights {12M} (Requires Feature 16E)

10. (Customer metering on the ([NORMAL] [and] [EMERGENCY] source(s) {18}[Insert data or references from Section 16901]

11. (Alternative Transfer Mode of Operation Switch. Provide a 2-Position Selector Switch, maintained contact, marked: AUTOMATIC and NON-AUTOMATIC. {29G}

12. (Alternative Transfer Mode of Operation Switch. Selectable via programming and LED display marked: AUTOMATIC and NON-AUTOMATIC. {29J}

13. (Service entrance rating {37}

14. (Ground fault protection on ([NORMAL] [and] [EMERGENCY] source(s) {37A or B}

15. (Lockable stainless steel cover for controller {38}

16. (Space heater rated for ([100] [400] watts {41A or C}

17. (Load Sequencing contacts for up to ten (10) loads {45}

18. (Transient voltage surge suppression with a rating per phase of ([50] [80] [100] kA {51D1, 51E1, 51F1} [See Section 16671A for more information]

19. (Generator start circuit protection rated for ([12] [24] DC {51M4A, 51M4B}

J. The microprocessor based controller shall communicate to engine Electronic Control Units (ECUs) via:

1. CAN bus standard SAE J1939, Deutz EMR, Scania S6, mtu MDEC

2. RS-232 Caterpillar CCM to EMCP-II and ECM

K. (The controller section shall include an on-board 24-Vdc power supply circuit consisting of two (2) 12-Vdc gel-cell UPS type batteries and battery charger to provide DC control power to the soft load transfer switch components. DC Circuit shall include a best DC source detection circuit. Engine battery shall be used as an alternate source for the DC power circuit.

L. (When required by the serving Utility and with written confirmation of Utility acceptance, additional Utility Inter-tie Protection Relays and redundancy shall be provided by:

1. Beckwith M-3410A with the following protective relay features:

a. 25 Synch Check

b. 27 Phase Under-voltage

c. 27G Ground Under-voltage

d. 32 Directional Power

e. 40 Loss-of-Field (Dual-Zone Offset-MHO Characteristic)

f. 46 Negative Sequence Over-Current

g. 47 Negative Sequence Over-Voltage

h. 51N AC Inverse Time Residual Over-Current

i. 51V Voltage Restrained Over-Current

j. 59 Phase Over-Voltage

k. 59G Ground Over-Voltage

l. 59I Peak Over-voltage

m. 60FL VT Fuse-Loss Detection

n. 79 Reconnect Enable Time Delay

o. 81 Over/Under Frequency

--(OR--

1.Beckwith M-3520 with the following protective relay featuresa. (21 Phase Distance

b. 25 Synch Check

c. 27 Phase Under-voltage

d. 27G Ground Under-voltage

e. 32 Directional Power

f. 46 Negative Sequence Over-Current

g. 47 Negative Sequence Over-Voltage

h. 50 Instantaneous Phase Over-Current

i. 50N Instantaneous Ground Over-Current

j. 51N AC Time Ground Over-Current

k. 51V Voltage Restrained Over-Current

l. 59 Phase Over-Voltage

m. (59G Ground Over-Voltage

n. (59I Peak Over-voltage

o. 60FL VT Fuse-Loss Detection

p. 67 Phase Directional Over-Current

q. 67N Residual Directional Over-Current

r. 79 Reconnect Enable Time Delay

s. 81 Over/Under Frequency

t. (81R Rate of Change of Frequency

-- (OR--

1. Schweitzer SEL-547 with the following protective relay featuresa. 25 Synch Check

b. 27 Phase Under-voltage

c. 32 Directional Power

d. 47 Negative Sequence Over-Voltage

e. 59 Phase Over-Voltage

f. 81 Over/Under Frequency

-- (OR --

2. Schweitzer SEL-351 with the following protective relay features

a. 25 Synch Check

b. 27 Phase Under-voltage

c. 32 Directional Power

d. 50 Instantaneous Phase Over-Current

e. 50N Instantaneous Ground Over-Current

f. 51N AC Time Ground Over-Current

g. 59 Phase Over-Voltage

h. 67 Phase Directional Over-Current

i. 67N Residual Directional Over-Current

j. 79 Reconnect Enable Time Delay

k. 81 Over/Under Frequency

-- (OR --

3. Basler BE1-951 with the following protective relay features

a. 24 Over-Excitation Volts/Hertz

b. 25 Synch Check

c. 27 Phase Under-voltage

d. 32 Directional Power

e. 47 Negative Sequence Over-Voltage

f. 50 Instantaneous Phase Over-Current

g. 50N Instantaneous Ground Over-Current

h. 51 AC Time Over-Current

i. 59 Phase Over-Voltage

j. 60FL VT Fuse-Loss Detection

k. 62 General Purpose Time

l. 81 Over/Under Frequency

-- (Or--

4. Basler BE1-IPS100 with the following protective relay features

a. 21 Over-Excitation Volts/Hertz

b. 25 Synch Check

c. 27 Phase Under-voltage

d. 32 Directional Power

e. 47 Negative Sequence Over-Voltage

f. 50 Instantaneous Phase Over-Current

g. 50N Instantaneous Ground Over-Current

h. 51 AC Time Over-Current

i. 51N AC Time Ground Over-Current

j. 51V Voltage Restrained Over-Current

k. 59 Phase Over-Voltage

l. 59G Ground Over-Voltage

m. 60FL VT Fuse-Loss Detection

n. 67 Phase Directional Over-Current

o. 79 Reconnect Enable Time Delay

p. 81 Over/Under Frequency

q. 81R Rate of Change of Frequency

2.05 Sequence of operations

A. Automatic Mode Operation Transfer Switch Loss of Normal Power

1. The system will continuously monitor the condition of the normal power supply. When the voltage or frequency of the normal source is sensed outside the user adjustable set points, and after an adjustable time delay to override momentary dips and/or outages, a contact shall close to initiate a starting of the emergency or stand-by source. Transfer to the alternate source shall take place upon attainment of adjustable pick-up voltage and frequency of the alternate source.

B. Return of Normal Power Breaker Open Transition Logic Selected

1. When normal source has been restored and is within the pre-selected ranges for voltage and frequency and after a time delay to ensure the integrity of the normal power source, the load shall be transferred back to normal source in a break-before-make transfer scheme. The generator set will continue to run for a user adjustable time to allow the generator set to run unloaded for cool down, after which the engine will be shut down. Upon completion the system will then be ready for automatic operation.

C. Return of Normal Power Breaker Closed Transition Logic Selected

1. When the normal source has been restored and is within the pre-selected ranges for voltage and frequency, and after an adjustable time-delay to ensure the integrity of the normal source, the load shall be transferred back to the normal source in a make-before-brake transfer scheme.

2. On completion of the time delay, the generator set bus will automatically synchronize with the utility service across the Source 1 (normal) breaker. When the two systems are synchronized, the Source 1 (normal) breaker will close and the Source 2 (emergency) breaker will open. The generator set will continue to run for a user adjustable time to allow the generator set to run unloaded for cool down, after which the engine will be shut down. Upon completion the system will then be ready for automatic operation.

D. Return of Normal Breaker Interchange (Soft Load) Logic Selected

1. When the normal source has been restored and is within the pre-selected ranges for voltage and frequency, and after an adjustable time-delay to ensure the integrity of the normal source, the load shall be transferred back to the normal source in a make-before-brake transfer scheme. On completion of the time delay, the generator set bus will automatically synchronize with the utility service across the Source 1 (normal) breaker. When the two systems are synchronized, the Source 1 (normal) breaker will close and the generator set will gradually transfer all loads to the utility.

2. On completion of the load transfer sequence the Source 2 (emergency) breaker will open. The generator set will continue to run for a user adjustable time to allow the generator set to run unloaded for cool down, after which the engine will be shut down. Upon completion the system will then be ready for automatic operation.

E. Peak Shaving

1. The closed transition soft load transfer switch can be factory configured to automatically parallel to the utility. In this operation mode, the switch will be paralleled with the utility when the user adjustable load power level is exceeded for the predetermined amount of time.

2.06 TEST MODE operation

A. Engine Run Test Mode

5. To perform an engine run test, first place the System Test switch in the Run position. Next place the Auto/Test switch in the Test position. The engine start contact will close, the engine will start and the generator will produce nominal voltage and frequency.

6. Neither Source 1 nor Source 2 breaker will be operated.

7. Returning either the System Test to Off position or Auto/Test switch to Auto position will remove the Engine Start command. The engine will shut down.

B. Transfer Test Mode (Open Transfer)

Note to Spec. Writer: This operation is carried out when the controllers Breaker Logic is programmed for Open Transition.

8. To perform an open transition test, first place the Test Mode selector switch in the Mode 1 position, followed by placing the System Test switch in Test position followed by placing Auto/Test selector switch in the Test position. After an adjustable time delay, the generator will start. After the nominal voltage and frequency are reached, the Source 1 (normal) breaker will open and the Source 2 (emergency) breaker will close on the dead bus.

9. Returning either the Auto/Test selector switch to Auto position or the Test Mode selector switch to Off position will cause the system to return to normal power as described in Return Of Normal Power Breaker Open Transition Logic Selected.

C. Transfer Test Mode (Closed Transition)

Note to Spec. Writer: This operation is carried out when the controllers Breaker Logic is programmed for Closed Transfer.

10. To perform a closed transition test, first place the Test Mode selector switch in the Mode 2 position, followed by placing the System Test switch in Test position followed by placing the Auto/Test selector switch in the Test position. After an adjustable time delay, the generator will start. After the nominal voltage and frequency are reached, the generator bus will be synchronized to the utility across the Source 2 (emergency) breaker. When the two sources are synchronized the Source 2 (emergency) breaker closes and then Source 1 (normal) breaker opens.

11. Returning either the Auto/Test selector switch to Auto position or the System Test selector switch to Off position will cause the system to return to normal power as described in Return Of Normal Power Breaker Closed Transition Logic Selected.

D. Transfer Test Mode (Interchange Soft Load Transition)

12. This operation is carried out when the controllers Breaker Logic is programmed for Interchange (Soft Load Transition).

13. To perform an interchange (soft load transition) test, first place the Test Mode selector switch in the Mode 1 position, followed by placing the System Test switch in Test position followed by placing the Auto/Test selector switch in the Test position. After an adjustable time delay, the generator will start. After the nominal voltage and frequency are reached, the generator bus will be synchronized to the utility across the Source 2 (emergency) breaker. When the two sources are synchronized the Source 2 (emergency) breaker is closed and the generator gradually assumes all load. On completion of the load transfer sequence the Source 1 (normal) breaker will open.

14. Returning either the Auto/Test selector switch to Auto position or the System Test selector switch to Off position will cause the system to return to normal power as described in Return of Normal Power (Switch in Closed Transition Mode).

E. Paralleling Test mode (Base Load)

1. This operation is carried out when the controllers Breaker Logic is changed to Parallel and the Base Load operation is selected.

2. To perform a paralleling test in a base load mode, first place the Test Mode selector switch in the Mode 2 position, followed by placing the System Test switch in Test position followed by placing the Auto/Test selector switch in the Test position. After an adjustable time delay, the generator will start. After the nominal voltage and frequency are reached, the generator bus will be synchronized to the utility across the Source 2 (emergency) breaker. When the two sources are synchronized the Source 2 (emergency) breaker is closed and the generator gradually assumes load up to the user programmable power level and then continuously maintains its power output.

3. Returning either the Auto/Test selector switch to Auto position or the System Test selector switch to Off position will cause the generator to gradually unload and then the Source 2 (emergency) breaker will open. The generator set will continue to run for a user adjustable time allowing the generator set to run unloaded for cool down, after which the engine will be shut down. Upon completion the system will then be ready for automatic operation.

F. Paralleling Test Mode (Import/Export)

1. This operation is carried out when the controllers Breaker Logic is changed to Parallel and the Import/Export operation is selected.

2. To perform a paralleling test in Import/Export mode, first place the Test Mode selector switch in the Mode 2 position, followed by placing the System Test switch in Test position followed by placing the Auto/Test selector switch in the Test position. After an adjustable time delay, the generator will start. After the nominal voltage and frequency are reached, the generator bus will be synchronized to the utility across the Source 2 (emergency) breaker. When the two sources are synchronized the Source 2 (emergency) breaker is closed and the generator gradually assumes load up to the user programmable import (adjustable power setting for power supplied from the utility) or export (adjustable power setting for power supplied to the utility) power level and then continuously varies its power output to maintain the selected power flow.

3. Returning either the Auto/Test selector switch to Auto position or the System Test selector switch to Off position will cause the generator to gradually unload and then the Source 2 (emergency) breaker will open. The generator set will continue to run for a user adjustable time allowing the generator set to run unloaded for cool down, after which the engine will be shut down. Upon completion the system will then be ready for automatic operation.

2.07 Wiring terminations

B. Terminal blocks shall conform to NEMA ICS 4. Terminal facilities shall be arranged for entrance of external conductors from the top or bottom of the enclosure. The main transfer switch terminals shall be suitable for the termination of conductors shown on the plans.

2.08 Power switching device 800-3200 Amp floor mount power switch type

E. Switching devices for 800 through 5000 Amp Floor Mount transfer switches shall be ([draw-out] [fixed] mounted power case switches or circuit breakers, Cutler-Hammer type MAGNUM DS or approved equal. Frame ratings shall be 800, 1600, 2000 or 3200 amperes. All breakers shall be UL listed for application in their intended enclosures for 100% of their continuous ampere rating. Breakers shall be electrically operated.

F. All breakers shall be provided with a true, two-step stored energy mechanism providing a maximum of three-cycle closing. All the energy required for closing the breakers shall be completely stored and held in readiness pending a release to close action. The power case switch or breaker shall have high-endurance characteristics being capable of no-load and full-load interruptions at rated current equal to or exceeding the UL endurance ratings for power circuit breakers without maintenance.

Transfer switches applied in service entrance equipment applications as noted in Paragraph 2.03-H above, provide power circuit breakers with trip units as specified in Section 16904 as noted in the table below: Are these values correct for 520MC and 1150? Digitrip 520 Paragraph 2.05 A through I

Digitrip 520M Paragraph 2.05 A through K

Digitrip 520MC Paragraph 2.05 A through L, and Z

Digitrip 1150 Paragraph 2.05 A through E; H through J, L through Z

2.09 customer metering {18}

A. Where indicated on the drawings, provide a separate customer metering compartment with front hinged door and include the following:

1. Current transformers where shown on the drawings or elsewhere specified shall be wired to shorting-type terminal blocks.

2. ([Potential transformers including primary and secondary fuses with disconnecting means] [Fused potential taps as the potential source] for metering as shown on the drawings.

Note to Spec. Writer:Select devices as required for item 2.08 B. Refer to section 16901 for detailed specification for metering as follows:

PowerXpert Series (Paragraph 2.02A)IQ Analyzer 6000 Series (Paragraph 2.02 B)IQ DP-4000 Series (Paragraph 2.02 C)IQ 300 Series (Paragraph 2.02 D)IQ 200 Series (Paragraph 2.02 E)

B. Microprocessor-Based Metering System {18}

C. (Microprocessor-Based Metering unit shall communicate (_______ protocol via a network communication interface.

2.010 enclosure

A. Each transfer switch shall be provided in a ([NEMA 1] [NEMA 3R] enclosure suitable for use in environments indicated in the drawings.

1. (Space heater rated for ([100] [400] watts {41A or C}

2.011 finish

A. NEMA 1 or 3R enclosures shall be painted with the manufacturers standard light gray ANSI 61.paint. NEMA 4 or 4X shall be stainless steel, non-painted.

PART 3 execution

3.01 examination

3.02 factory testing

A. The following standard factory tests shall be performed on the equipment provided under this section. All tests shall be in accordance with the latest version of UL and NEMA standards.

1. Insulation check to ensure the integrity of insulation and continuity of the entire system

2. Visual inspection to ensure that the switch matches the specification requirements and to verify that the fit and finish meet quality standards

3. Mechanical tests to verify that the switch's power sections are free of mechanical hindrances

4. Electrical tests to verify the complete electrical operation of the switch and to set up time delays and voltage sensing settings of the logic

B. The manufacturer shall provide three (3) certified copies of factory test reports.

3.08 Installation

A. The Contractors shall install all equipment per the manufacturers recommendations and the contract drawings.

3.09 field quality control

A. Provide the services of a qualified factory-trained manufacturers representative to assist the contractor in installation and start-up of the equipment specified under this section for a period of (____ working days. The manufacturers representative shall provide technical direction and assistance to the contractor in general assembly of the equipment, connections and adjustments, and testing of the assembly and components contained therein.

B. The contractor shall provide three (3) copies of the manufacturers field start-up.

3.010 MANUFACTURERS CERTIFICATION

A. A qualified factory-trained manufacturers representative shall certify in writing that the equipment has been installed, adjusted and tested in accordance with the manufacturers recommendations.

B. The Contractor shall provide three (3) copies of the manufacturers representatives certification.

3.011 Training

A. The contractor shall provide a training session for up to five (5) owners representatives for (____ normal workdays at a jobsite location determined by the owner.

B. A manufacturers qualified representative shall conduct the training session. The training program shall consist of the instruction on the operation of the assembly, circuit breakers and major components within the assembly.

3.012 installation

A. The contractor shall install all equipment per the manufacturers recommendations and the contract drawings.

B. All necessary hardware to secure the assembly in place shall be provided by the contractor.

C. The equipment shall be installed and checked in accordance with the manufacturers recommendations.

3.013 field service ORGANIZATION

A. The manufacturer of the ATS shall also have a national service organization that is available throughout the contiguous United States and is available on call 24 hours a day, 365 days a year.

Note to Spec Writer: { } Denotes EATON Feature reference number

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16496F-

06/24/10