T e c h n i c a l R e p o r t T w o

Transcription

1 T e c h n i c a l R e p o r t T w o JENNA STAUFFER FACULTY ADVISOR: PROF. DANNERTH NOVEMBER 4, 2009 Connecticut Science Center Hartford, CT

2 T a b l e O f C o n t e n t s Executive Summary..Page 2 Section I: Power Distribution Systems Summary Description of Distribution System.....Page 3 Utility Company Information Page 3 Service Entrance Page 4 Voltage Systems Page 5 Emergency Power Systems....Page 6 Locations of Switchgear.....Page 6 Over-current Devices......Page 11 Transformers Page 12 Grounding......Page 12 Special Equipment Page 13 Lighting Loads Page 13 Lighting Controls Page 15 Mechanical and Other Loads......Page 16 Service Entrance Size......Page 20 Environmental Stewardship Design.....Page 22 Design Issues......Page 23 Single-Line Diagram.....Page 23 Section II: Communication Systems Fire Alarm Systems Page 25 Telecommunications.....Page 25 Security Systems Page 25 Audiovisual Systems Page 26 Appendix A: Single-Line Diagram and Existing Drawings Page 27 Appendix B: HID Ballasts Page 28 2

3 E x e c u t i v e S u m m a r y This report is a thorough analysis of the electrical systems found in the Connecticut Science Center. This facility, which consists of an underground parking garage in conjunction with a museum, is a total of 244,000 square feet. The museum space is approximately 156,000 square feet. Its primary function is to promote the excitement and wonder of science as well as the state s commitment to education and cultural enrichment. Part one consists of the analysis of the system components, as well as a single-line diagram describing the layout. Part two describes the communications systems. The facility was designed to be LEED Certified. Keeping this in mind, many of the features of the electrical system are energy efficient. Supplemental power is intended to be installed at some point in the future. This power is in the form of photovoltaic panels and a fuel cell. The building also has emergency systems that help to protect the occupants of the facility. They allow for safe egress and provide power with the help of a generator. After examining the electrical system, the size of the service entrance was calculated for the museum space. It was quite close to the size that is actually used in the building, including growth. Through the study of this building, it was possible to learn a great deal about the electrical systems necessary for proper museum operation. 3

4 P a r t O n e : P o w e r D i s t r i b u t i o n S y s t e m s Summary of Distribution System: The Connecticut Science Center has a radial electrical system that enters the building through one service entrance point. This point is located at the transformer room on garage level one. The main transformer, which is provided by the utility, is located within this room and has a secondary voltage of 480Y/277V, 3P, 4W. The 3000A main distribution panel supplies power to subsequent feeders and panels. In the future, photovoltaic panels and a fuel cell are intended to be installed for supplemental power. The necessary connections and wirings are already incorporated. Emergency power is provided by a 900kW/1125kVA generator. Utility Company Information: The Connecticut Science Center is provided power by Connecticut Light and Power (CL &P), which is a part of the Northeast Utilities System. The website and address are the following: Selden Street Berlin, CT The building is standalone, and connects directly to the utility. The applicable rate schedule for the CSC is an intermediate time-of-day, non-manufacturing facility (Rate 56). The details are as follows: Customer Charge: $420.00/month 4

5 Demand Charge (per kva): Distribution Service- Dist. Demand Charge $5.59 Distribution Service- Prod. Trans. Demand Charge $0.18 Transmission Service- Demand Charge $5.09 Competitive Transition Assessment- Demand Charge $3.00 Energy Charge (per kwh): Peak Off-Peak Distribution Service- Charge $ $ Competitive Transition Assessment-Charge $ $ Conservation Charge $ $ Renewable Energy Charge $ $ Generation Charge (if max demand <500 kw) $ $ Oct. Generation Charge (if max demand >500 kw) $ $ Nov. Generation Charge (if max demand >500 kw) $ $ Dec. Generation Charge (if max demand >500 kw) $ $ The building has only been in operation for four months, therefore a summary of the Electric Utility Load Data is not immediately available. Service Entrance: Connecticut Light and Power is responsible for providing power to the CSC up to the main transformer. The power is delivered through a concrete ductbank enclosing (4) 5 PVC conduits. They feed directly into Transformer Room G151 in the southwest corner of Garage Level One. Electronic metering, monitored by CL&P, is located on the exterior of this wall. The building owner also performs metering there. The main transformer is located in a cast in place concrete vault. It is supplied by the utility company and provides a secondary voltage of 480Y/277V. It is then fed into the main distribution panel, which is located in a neighboring room. Voltage Systems: The main transformer supplies the building with 480Y/277V, 3P, 4W voltage. The majority of the general lighting operates using 277V. The feeder providing this is 480Y/277V 3P, 4W. Exhibit space lighting, as well as theater, and other specialty lighting operates using 120V from a 208Y/120V 3P, 4W feeder. Most dimmable 5

6 fixtures operate on this same voltage. Receptacles, some security, and emergency equipment also operate at 120V on a 208Y/120V 3P, 4W feeder. Most of the large equipment, like elevators and escalators, are 480 V served by 480Y/277V 3P, 4W feeders. The majority of fan motors run on 460 V, 3P. Air handling unit supply and return fans are typically 480 V, 3P. Pumps run on similar voltage. Fan coil units that are 755 rpm run on 120V, 1P. When they are above 755 rpm, they require a 277V, 1P connection. Emergency Power Systems: The Connecticut Science Center serves as a public facility. Therefore, it is imperative that an emergency power system is designated. Patron safety should always be of upmost importance. A 900kW/1125kVA emergency generator with a voltage of 480Y/277V, 3P, 4W supplies power for the CSC s emergency power system. A 1600A circuit breaker serves the generator distribution panel. This panel then serves three four-pole automatic transfer switches (ATS). A garage ATS serves the lights and HVAC equipment in the parking levels required for visitor safety. A safety ATS serves the various types of fire dampers, alarms, and automatic doors needed for a safe exit. The remaining ATS, which is intended to supply emergency power to the museum space, serves any mechanical equipment, lighting, or other measure required for safety. Busduct designated for emergency panels are located in each exhibit tower. Where elevators are connected, a disconnect switch with a fire safety interface relay exists as well. In the event of a problem with the primary power supply, automatic transfer switches send signals for the generator to begin running. All emergency systems are then provided with power required for the safety of occupants. Locations of Switchgear: The main transformer and generator are located in the southwest corner of Garage Level One. They are in the Transformer Room G151 and Generator Room G148, respectively. The Main Distribution Panel Room, G144, houses its namesake. It can be found adjacent to the Generator Room. Most panels are located in the north and south tower electrical rooms, which are provided on each floor. The lighting control dimming panels (LCDE) are also included. 6

7 The following table is a listing of the major pieces of equipment found in the CSC. MAJOR EQUIPMENT SCHEDULE TAG TYPE OF EQUIPMENT FLOOR ROOM DRAWING ROOM NAME NO. NO. MDP DISTRIBUTION PANEL GARAGE-1 G144 MDP EG01S2 GDP EMER. DIST. PANEL GARAGE-1 G148 GENERATOR RM EG01S2 GMDP DISTRIBUTION PANEL GARAGE-1 G144 MDP EG01S2 - TRANSFORMER BY UTILITY GARAGE-1 G151 TRANSFORMER EG01S2 T-S1 TRANSFORMER GARAGE-1 G131 EXHIBIT SUPPORT EG01S2 T-GB TRANSFORMER GARAGE-1 G144 MDP EG01S2 T-PK TRANSFORMER GARAGE-1 G144 MDP EG01S2 T-G TRANSFORMER GARAGE-1 G144 MDP EG01S2 T-E1 TRANSFORMER GARAGE-2 G204 MECH RM EG02S1 T-1A TRANSFORMER PLAZA 122 ELEC RM E-101 T-AV1B TRANSFORMER PLAZA 104 ELEC RM E-101 T-1B TRANSFORMER PLAZA 104 ELEC RM E-101 T-2A TRANSFORMER SECOND 202 ELEC RM E-102 T-3A TRANSFORMER THIRD 314 ELEC RM E-103 T-3B TRANSFORMER THIRD 343 ELEC RM E-103 T-3B2 TRANSFORMER THIRD 343 ELEC RM E-103 T-3B3 TRANSFORMER THIRD 343 ELEC RM E-103 T-4A TRANSFORMER FOURTH 405 ELEC RM E-104 T-4A2 TRANSFORMER FOURTH 405 ELEC RM E-104 T-4B TRANSFORMER FOURTH 413 ELEC RM E-104 T-4B2 TRANSFORMER FOURTH 413 ELEC RM E-104 T-5A TRANSFORMER FIFTH 505 ELEC RM E-105 T-5A2 TRANSFORMER FIFTH 505 ELEC RM E-105 T-5B TRANSFORMER FIFTH 513 ELEC RM E-105 T-5B2 TRANSFORMER FIFTH 513 ELEC RM E-105 T-6B TRANSFORMER SIXTH 613 ELEC RM E-106 T-6B2 TRANSFORMER SIXTH 613 ELEC RM E-106 T-GB2 EMERG. TRANSFORMER GARAGE-1 G144 MDP EG01S2 T-EPK EMERG. TRANSFORMER GARAGE-1 G144 MDP EG01S2 T-ELEVD EMERG. TRANSFORMER GARAGE-1 G144 MDP EG01S2 T-GA2 EMERG. TRANSFORMER GARAGE-1 G144 MDP EG01S2 GEN GENERATOR GARAGE-1 G148 GENERATOR RM EG01S2 ATS-S TRANSFER SWITCH GARAGE-1 G144 MDP EG01S2 ATS-L TRANSFER SWITCH GARAGE-1 G144 MDP EG01S2 ATS-G TRANSFER SWITCH GARAGE-1 G144 MDP EG01S2 ATS-FP FIRE PROT. TRANS. SWITCH GARAGE-1 G149 FIRE PUMP EG01S2 ATS TRANSFER SWITCH GARAGE-1 G145 STEAM/PUMP EG01S2 The succeeding table describes the panel boards found throughout the facility. 7

8 PANEL BOARDS TAG VOLTAGE SYSTEM MAIN SIZE FLOOR ROOM NO. ROOM NAME DRAWING IN 480Y/277V,3P,4W 60A MCB GARAGE-1 G144 MDP EG0S12 LCDG 480Y/277V,3P,4W 125A MCB GARAGE-2 G206 SPRINKLER EG02S2 LCDG2 480Y/277V,3P,4W 125A MCB GARAGE-1 G105 STORAGE EG01N1 LCDG3 480Y/277V,3P,4W 125A MCB GARAGE-1 G105 STORAGE EG01N1 LCDEG 480Y/277V,3P,4W 125A MCB GARAGE-2 G206 SPRINKLER EG02S2 LCDEG2 480Y/277V,3P,4W 125A MCB GARAGE-1 G144 MDP EG0S12 LCDEG3 480Y/277V,3P,4W 125A MCB GARAGE-1 G105 STORAGE EG01N1 LCDEG4 480Y/277V,3P,4W 125A MLO GARAGE-1 G105 STORAGE EG01N1 LCD01A 480Y/277V,3P,4W 125A MCB FIRST 101 ELEV. LOBBY E101U LCDE01A 480Y/277V,3P,4W 125A MCB FIRST 101 ELEV. LOBBY E101U LCDE01A2 480Y/277V,3P,4W 40A MCB FIRST 101 ELEV. LOBBY E101U LCD01B 480Y/277V,3P,4W 60A MCB FIRST 104 ELECTRICAL E-101 LCDE01B 480Y/277V,3P,4W 125A MCB FIRST 104 ELECTRICAL E-101 LCDE01B2 480Y/277V,3P,4W 40A MCB FIRST 104 ELECTRICAL E-101 LCD02A 480Y/277V,3P,4W 125A MCB SECOND 202 ELECTRICAL E-102 LCDE02A 480Y/277V,3P,4W 125A MCB SECOND 202 ELECTRICAL E-102 LCDS 480Y/277V,3P,4W 125A MCB GARAGE-1 G144 MDP EG0S12 LCDES 480Y/277V,3P,4W 125A MCB GARAGE-1 G144 MDP EG0S12 LCD03A 480Y/277V,3P,4W 125A MCB THIRD 314 ELECTRICAL E-103 LCDE03A 480Y/277V,3P,4W 125A MCB THIRD 314 ELECTRICAL E-103 LCDE03A2 208Y/120V,3P,4W 125A MLO THIRD 314 ELECTRICAL E-103 LCD03B 480Y/277V,3P,4W 125A MCB THIRD 343 ELECTRICAL E-103 LCDE03B 480Y/277V,3P,4W 125A MLO THIRD 343 ELECTRICAL E-103 LCD04A 480Y/277V,3P,4W 125A MCB FOURTH 405 ELECTRICAL E-104 LCDE04A 480Y/277V,3P,4W 125A MLO FOURTH 405 ELECTRICAL E-104 LCDE04A2 208Y/120V,3P,4W 125A MLO FOURTH 405 ELECTRICAL E-104 LCD04B 480Y/277V,3P,4W 125A MCB FOURTH 413 ELECTRICAL E-104 LCDE04B 480Y/277V,3P,4W 125A MLO FOURTH 413 ELECTRICAL E-104 LCD05A 480Y/277V,3P,4W 125A MLO FIFTH 505 ELECTRICAL E-105 LCDE05A 480Y/277V,3P,4W 125A MLO FIFTH 505 ELECTRICAL E-105 LCDE05A2 208Y/120V,3P,4W 125A MLO FIFTH 505 ELECTRICAL E-105 LCD05B 480Y/277V,3P,4W 125A MCB FIFTH 513 ELECTRICAL E-105 LCDE05B 480Y/277V,3P,4W 125A MCB FIFTH 513 ELECTRICAL E-105 LCD06B 480Y/277V,3P,4W 125A MCB SIXTH 613 ELECTRICAL E-106 LCDE06B 480Y/277V,3P,4W 125A MCB SIXTH 613 ELECTRICAL E-106 DP-G2 208Y/120V, 3P, 4W 60A MCB GARAGE-1 G121 JANITOR EG01S1 DP-3A2 208Y/120V, 3P, 4W 60A MLO THIRD 314 ELECTRICAL E-103 EDP-3A 480Y/277V,3P,4W 60AMCB THIRD 314 ELECTRICAL E-103 DP-3B 208Y/120V,3P,4W 225A MCB THIRD 343 ELECTRICAL E-103 EDP-3B 208Y/120V,3P,4W 60A MCB THIRD 343 ELECTRICAL E-103 EDP-3B2 480Y/277V,3P,4W 60A MCB THIRD 343 ELECTRICAL E-103 8

9 PANEL BOARDS (CONTINUED) TAG VOLTAGE SYSTEM MAIN SIZE FLOOR ROOM NO. ROOM NAME DRAWING DP-4A 208Y/120V,3P,4W 400A MCB FOURTH 405 ELECTRICAL E-104 DP-4B 208Y/120V,3P,4W 400A MCB FOURTH 413 ELECTRICAL E-104 DP-5A1 208Y/120V,3P,4W 400A MCB FIFTH 505 ELECTRICAL E-105 DP-5B 208Y/120V,3P,4W 400A MCB FIFTH 513 ELECTRICAL E-105 DP-6B 208Y/120V,3P,4W 400A MCB SIXTH 613 ELECTRICAL E-106 EDP 480Y/277V,3P,4W 1600A MCB GARAGE-1 G147 ELECTRICAL EG0S12 ESP 480Y/277V,3P,4W 400A MCB GARAGE-1 G147 ELECTRICAL EG01S2 ESP-GB 208Y/120V,3P,4W 225A MCB GARAGE-1 G144 MDP EG0S12 EP-GA 480Y/277V,3P,4W 400A MCB GARAGE-2 G204 MECHANICAL EG02S1 ESP-GB2 480Y/277V,3P,4W 125A MCB GARAGE-1 G145 STEAM/PUMP EG01S2 EL-G2 480Y/277V,3P,4W 225A MCB GARAGE-1 G144 MDP EG0S12 EP-GA2 208Y/120V,3P,4W 125A MCB GARAGE-2 G204 MECHANICAL EG02S1 PP-GA 480Y/277V,3P,4W 400A MCB GARAGE-2 G204 MECHANICAL EG02S1 GMDP 480Y/277V,3P,4W 400A MCB GARAGE-1 G144 MDP EG0S12 EL-G 480Y/277V,3P,4W 225A MCB GARAGE-1 G147 ELECTRICAL EG0S12 EL-G1 480Y/277V,3P,4W 125A MCB GARAGE-1 G136 CORRIDOR EG01S2 ESP-G1 208Y/120V,3P,4W 125A MCB GARAGE-1 G147 ELECTRICAL EG01S2 LP-G1 208Y/120V,3P,4W 225A MLO GARAGE-1 G136 CORRIDOR EG01S2 PP-G1 480Y/277V,3P,4W 225A MCB GARAGE-1 G147 ELECTRICAL EG01S2 LP-GB 480Y/277V,3P,4W 125A MLO GARAGE-1 G144 MDP EG0S12 RP-GB 208Y/120V,3P,4W 225A MCB GARAGE-1 G144 MDP EG0S12 RP-G1 208Y/120V,3P,4W 400A MCB GARAGE-1 G136 CORRIDOR EG01S2 LP-G2 480Y/277V,3P,4W 225A MCB GARAGE-1 G144 MDP EG0S12 RP-G2 208Y/120V, 3P,4W 225A MCB GARAGE-1 G144 MDP EG0S12 MDP 480Y/277V,3P,4W 3000A MCB GARAGE-1 G144 MDP EG0S12 LP-S1 480Y/277V,3P,4W 125A MCB GARAGE-1 G131 EXHIBIT EQUIP. EG01S2 GDP 480Y/277V,3P,4W 1600A MLO GARAGE-1 G148 GENERATOR EG01S2 SDP 480Y/277V,3P,4W 400A MLO GARAGE-1 G145 STEAM/PUMP EG01S2 PP-GA 480Y/277V,3P,4W 400A MCB GARAGE-2 G204 MECHANICAL EG02S2 PP-GA2 480Y/277V,3P,4W 400A MCB GARAGE-1 G105 STORAGE EG01N1 LP-1A 480Y/277V,3P,4W 400A MCB FIRST 122 ELECTRICAL E101U ESP-1A 208Y/120V,3P,4W 125A MCB FIRST 122 ELECTRICAL E101U EL-1A 480Y/277V,3P,4W 125A MCB FIRST 122 ELECTRICAL E101U RP-1A 208Y/120V,3P,4W 225A MCB FIRST 122 ELECTRICAL E101U RP-1A2 208Y/120V, 3P, 4W 125A MLO SECOND 202 ELECTRICAL E-102 AV-1B 208Y/120V,3P,4W 50A MCB FIRST 122 ELECTRICAL E101U LP-1B 480Y/277V,3P,4W 225A MCB FIRST 122 ELECTRICAL E101U RP-1B 208Y/120V,3P,4W 225A MLO FIRST 122 ELECTRICAL E101U RP-1B3 208Y/120V,3P,4W 125A MCB FIRST 122 ELECTRICAL E101U EL-1B 480Y/277V,3P,4W 225A MLO FIRST 122 ELECTRICAL E101U EP-1B 208Y/120V,3P,4W 120A MCB FIRST 122 ELECTRICAL E101U 9

10 PANEL BOARDS (CONTINUED) TAG VOLTAGE SYSTEM MAIN SIZE FLOOR ROOM NO. ROOM NAME DRAWING LP-2A 480Y/277V,3P,4W 200A MCB SECOND 202 ELECTRICAL E-102 RP-2A 208Y/120V,3P,4W 225A MLO SECOND 202 ELECTRICAL E-102 EL-2A 480Y/277V,3P,4W 225A MCB SECOND 202 ELECTRICAL E-102 LP-3A 480Y/277V,3P,4W 225A MCB THIRD 314 ELECTRICAL E-103 LP-3B 480Y/277V,3P,4W 400A MCB THIRD 343 ELECTRICAL E-103 RP-3A 208Y/120V, 3P,4W 225A MCB THIRD 314 ELECTRICAL E-103 RP-3B 208Y/120V, 3P,4W 225A MCB THIRD 343 ELECTRICAL E-103 LP-3A 480Y/277V,3P,4W 225A MCB THIRD 314 ELECTRICAL E-103 EL-3A 480Y/277V,3P,4W 400A MCB THIRD 314 ELECTRICAL E-103 EL-3B 480Y/277V,3P,4W 125A MCB THIRD 343 ELECTRICAL E-103 ESP-3A 208Y/120V, 3P,4W 225A MCB THIRD 314 ELECTRICAL E-103 ESP-3B 208Y/120V, 3P,4W 125A MCB THIRD 343 ELECTRICAL E-103 LP-4A 480Y/277V,3P,4W 400A MCB FOURTH 405 ELECTRICAL E-104 LP-4B 480Y/277V,3P,4W 400A MCB FOURTH 413 ELECTRICAL E-104 RP-4A 208Y/120V,3P,4W 400A MLO FOURTH 405 ELECTRICAL E-104 RP-4B 208Y/120V,3P,4W 400A MCB FOURTH 413 ELECTRICAL E-104 EL-4A 480Y/277V,3P,4W 125A MCB FOURTH 405 ELECTRICAL E-104 EL-4B 480Y/277V,3P,4W 125A MCB FOURTH 413 ELECTRICAL E-104 LP-5A 480Y/277V,3P,4W 400A MCB FIFTH 505 ELECTRICAL E-105 LP-5B 480Y/277V,3P,4W 400A MCB FIFTH 513 ELECTRICAL E-105 RP-5A 208Y/120V,3P,4W 400A MCB FIFTH 505 ELECTRICAL E-105 RP-5B 208Y/120V,3P,4W 400A MCB FIFTH 513 ELECTRICAL E-105 EL-5A 480Y/277V,3P,4W 125A MCB FIFTH 505 ELECTRICAL E-105 EL-5B 480Y/277V,3P,4W 125A MCB FIFTH 513 ELECTRICAL E-105 ESP-5A 208Y/120V,3P,4W 225A MCB FIFTH 505 ELECTRICAL E-105 ESP-5B 208Y/120V,3P,4W 225A MCB FIFTH 513 ELECTRICAL E-105 LP-6B 480Y/277V,3P,4W 400A MCB SIXTH 613 ELECTRICAL E-106 RP-6B 208Y/120V,3P,4W 225A MLO SIXTH 613 ELECTRICAL E-106 RP-6B3 208Y/120V,3P,4W 400A MCB SIXTH 613 ELECTRICAL E-106 EL-6B 480Y/277V,3P,4W 125A MCB SIXTH 613 ELECTRICAL E-106 ESP-6B 480Y/277V,3P,4W 600A MCB SIXTH 613 ELECTRICAL E-106 RP-E1 208Y/120V,3P,4W 125A MCB GARAGE-1 G105 STORAGE EG01N1 RP-E2 208Y/120V,3P,4W 225A MCB GARAGE-1 G119 CORRIDOR EG01S1 RP-S1 208Y/120V,3P,4W 225A MCB GARAGE-1 G131 EXHIBIT EQUIP. EG01S2 EL-G2 480Y/277V,3P,4W 125A MCB GARAGE-1 G144 MDP EG0S12 EP-KD 208Y/120V,3P,4W 225A MCB GARAGE-1 G144 MDP EG0S12 EP-E1 480Y/277V,3P,4W 125A MCB GARAGE-1 G105 STORAGE EG01N1 T 208Y/120V,3P,4W 60A MCB GARAGE-1 G128 TEL/DATA EG01S2 ELEVD 208Y/120V,3P,4W 100A MCB GARAGE-1 G144 MDP EG0S12 ELEV1 208Y/120V,3P,4W 60A MLO GARAGE-2 G202 ELEVATOR EG02S1 ELEV2 208Y/120V,3P,4W 60A MLO GARAGE-2 G202 ELEVATOR EG02S1 10

11 PANEL BOARDS (CONTINUED) TAG VOLTAGE SYSTEM MAIN SIZE FLOOR ROOM NO. ROOM NAME DRAWING ELEV3,4,5 208Y/120V,3P,4W 80A MLO THIRD 302 ELEVATOR E-103 ELEV6 208Y/120V,3P,4W 60A MLO SECOND 217 ELEVATOR E-102 ELEV7 208Y/120V,3P,4W 60A MLO GARAGE-2 G205 ELEVATOR EG02S2 ELEV8 208Y/120V,3P,4W 60A MLO GARAGE-1 G129 MACHINE EG01S2 ELEV9 208Y/120V,3P,4W 60A MLO FIRST 105 ELEVATOR E101U EPKG 208Y/120V,3P,4W 125A MCB GARAGE-1 G113 KITCHEN EG01S2k PPKG 208Y/120V,3P,4W 225A MCB GARAGE-1 G113 KITCHEN EG01S2k Over-current Devices: The Connecticut Science Center has various over-current devices intended to protect the electrical system. After the utility transformer, a 3000A (switch size/fuse rating) fused switch is present. A surge protection device is also located after this switch and prior to feeding into the main distribution panel (MDP). The maximum surge current rating is 100kA per mode and 200kA per phase. The MDP consists of twenty one molded-case circuit breakers with an AIC rating of 100,000. It has a bus rating of 3000A. Between the bus duct and the feeder to the distribution panels, fusible switches are present. They are typically quick-make, quick-break with enclosed knife switches. The switch size is 400A, while the fuse rating varies from 225A to 400A. Individual panel boards vary between main circuit breaker and main lugs only. Most have an AIC rating of 100,000. The exceptions include dimmer panels and a few emergency panels, which have AIC ratings of 42,000. The emergency generator is protected by unit mounted, 3P, molded-case circuit breakers. The emergency distribution panel has an AIC rating of 100,000. Much like the normal power system, fusible switches are present between the bus duct and the feeder to the emergency panels. The switch size ranges from 200A to 600A. The fuse rating is varies from 125A to 600A. Transformers: A variety of transformers are found within the facility. The utility company provides the first, which is located just inside of the building, near the service 11

12 entrance. Twenty-seven subsequent transformers are located in electrical rooms located in the north and south towers. The following schedule describes the transformers used by the CSC. INDIVIDUAL TRANSFORMER SCHEDULE TAG PRIMARY VOLTAGE SECONDARY VOLTAGE SIZE TYPE TEMP. RISE TAPS MOUNTING REMARKS N/A - - PAD-MOUNT (1) T-S1 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-GB 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-PK 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-G 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-E1 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-1A 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-AV1B 480V,3PH,3W 208Y/120V,3PH,4W 15 ISOLATION 115 DEG.C (4) 2.5% (2) T-1B 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% (2) T-2A 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-3A 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-3B 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% (2) T-3B2 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% (2) T-3B3 480V,3PH,3W 208Y/120V,3PH,4W 9 DRY 115 DEG.C (4) 2.5% (2) T-4A 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-4A2 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-4B 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-4B2 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-5A 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-5A2 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-5B 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-5B2 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-6B 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-6B2 480V,3PH,3W 208Y/120V,3PH,4W DRY 115 DEG.C (6) 2.5% (2) T-GB2 480V,3PH,3W 208Y/120V,3PH,4W 75 ISOLATION 115 DEG. C (4) 2.5% PAD-MOUNT T-EPK 480V,3PH,3W 208Y/120V,3PH,4W 75 DRY 115 DEG.C (6) 2.5% PAD-MOUNT T-ELED 480V,3PH,3W 208Y/120V,3PH,4W 30 DRY 115 DEG.C (4) 2.5% PAD-MOUNT T-GA2 480V,3PH,3W 208Y/120V,3PH,4W 45 DRY 115 DEG.C (6) 2.5% PAD-MOUNT NOTES: (1) Transformer provided by utility; Connecticut Light & Power. (2) Stacked above another transformer or other piece of equipment using structural steel. KEY: N/A=NOT APPLICABLE Grounding: Grounding details are shown for the main transformer and for the Transformer Room. A typical transformer grounding detail is also available. Structural column, fire pump and garage service, as well as the telecommunication system grounding, is detailed. A grounding riser for the telecommunications system is featured. Grounding is also shown on the single-line diagram. Lightning 12

13 protection is not featured on the roof plan. However, it is described in the electrical portion of the specifications. Special Equipment: The Connecticut Science Center was designed in an effort to be LEED Certified. With this in mind, the designers chose to introduce a fuel cell, as well as photovoltaic panels. As a result of budgetary restraints and value engineering, both power generation methods have not yet been implemented. In the future, they are intended to be purchased and integrated into the building s daily power use. However, the projected installation date is still unknown at this time. The fuel cell, when it becomes a part of the CSC, will provide 200kW of combined electricity and high and low grade heat. It is a phosphoric acid fuel cell cogeneration system. The power is delivered directly to the CSC through the MDP. CL&P plans to allow for monthly net metering and excess energy credits for a wholesale rate when the cell is finally installed. Electrical generation efficiency provided by the manufacturer is estimated to be thirty-six percent. When purchased, the photovoltaic system shall consist of a 75kW panel array, mounted on the south façade of the building, in a vertical position. The panels will be connected in series and self-ballasted. A 35kW inverter will convert the DC panel power to 480Y/277V, 3P, 4W AC. It will then provide supplemental power for the building directly to the MDP. Paralleling and synchronizing equipment will provide modulation to match the voltage, phase, and frequency of CL&P utility power supply. Should these conditions not be met, it will immediately disconnect. No power factor correction or power quality equipment currently exists. Lighting Loads: The lighting found throughout the building is designed with energy efficiency in mind. When possible, fluorescent fixtures are used in the majority of the spaces. Metal halide sources are used out of necessity in some spaces and on the exterior due to ceiling heights. The theater uses energy-efficient halogen incandescent sources for ease of dimmability. Ample daylighting is provided by the glazing encompassing the atrium space. A projection screen, clad with LEDs, provides the museum with a unique night feature. 13

14 Fluorescent luminaires typically operate at 277V, while incandescent operate using 120 volts. H.I.D. sources operate from the same panels as fluorescents, and their ballasts may be found in Appendix B. Occupancy sensors, photosensors, and astronomical time clocks will provide control of the lighting design. TYPE LAMP WATTAGE LIGHTING FIXTURE SCHEDULE NO. OF LAMPS BALLAST TYPE VOLTAGE INPUT WATTS BALLAST FACTOR CURRENT 14 POWER FACTOR L1 32W T ELECTRONIC, PS L2 150W T6MH ELECTRONIC L3 42W CFL 42 2 ELECTRONIC, PS L4 37W MR16IR 25DEG NF 37 1 INTEGRAL XFRMR L6 26W CFL 26 1 ELECTRONIC, PS L7 26W CFL 26 1 ELECTRONIC, PS L8 26W CFL 26 1 ELECT 5% DIM, PS L10 60W A-19 HALOGEN L11 100W A-19 HALOGEN L12 100W PAR38FL HAL L13 32 W CFL 32 2 ELECTRONIC, PS L14 28W T ELECT 1% DIM, PS (MAX) 0.98 L15 54W T5HO 54 1 ELECT 1% DIM, PS (MAX) 0.95 L16 28W T ELECTRONIC, PS L17 32W T ELECT 1% DIM, PS (MAX) 0.95 L19 32W T ELECTRONIC, RS L20 40W TL CF 40 1 ELECTRONIC, PS L21 28W T ELECTRONIC, RS L23 32W T ELECTRONIC, PS L24 32W T ELECTRONIC, PS L25 31W T8 U-LAMP 31 2 ELECTRONIC, PS L26 40W TL CF 40 2 ELECTRONIC, PS L27 31W T8 U-LAMP 31 2 ELECTRONIC, PS L28 26W CFL 26 1 ELECTRONIC, PS L30 39W PAR 30FL MH 39 1 ELECTRONIC L31 70W PAR 38FL MH 70 1 ELECTRONIC L35 25W T ELECTRONIC L36 100W A-19 HALOGEN L37 25 W T10 INCAND L38 100W PAR 38FL HAL L39 250W PAR38SP L40 50W PAR30FL IR L41 150W PAR38FL MH ELECTRONIC L42 25W T ELECTRONIC, PS L43 70W PAR 38FL MH 70 1 ELECTRONIC L44 70W PAR 38FL MH 70 1 ELECTRONIC L45 39W PAR 20FL MH 39 1 ELECTRONIC L46 32W T ELECTRONIC, PS L47 70W PAR 38FL MH 70 1 ELECTRONIC L48 39W PAR 30FL MH 39 1 ELECTRONIC L49 150W PAR38FL MH ELECTRONIC L50 70W PAR 38FL MH 70 1 ELECTRONIC LIGHTING FIXTURE SCHEDULE (CONTINUED) TYPE LAMP WATTAGE NO. OF BALLAST TYPE VOLTAGE INPUT BALLAST CURRENT POWER

15 LAMPS WATTS FACTOR FACTOR L51 150W CMH T ELECTRONIC L52 13W CFL 13 2 MAGNETIC L53 100W MH ED ELECTRONIC L54 150W MH T ELECTRONIC L55 39W PAR 30FL MH 39 1 ELECTRONIC L56 32W T ELECTRONIC, PS L57 32W T ELECTRONIC, PS L58 28W T ELECTRONIC, PS L59 37W MR16IR 25DEG NF 37 1 INTEGRAL XFRMR L60 37W MR16IR 25DEG NF 37 1 INTEGRAL XFRMR L61 32W CFL 32 1 ELECT 5% DIM, PS L62 32W T ELECTRONIC, PS L64 100W MH ED ELECTRONIC, PS A 28W T ELECTRONIC, RS A1 32W T ELECTRONIC, PS B2 32W T ELECTRONIC, PS D1 37W MR16IR 25DEG NF 37 1 INTEGRAL XFRMR D4 70W PAR 38FL MH 70 1 ELECTRONIC, PS D6 100W MH ED ELECTRONIC, PS G 175W MH ELECTRONIC, PS G1 175W MH ELECTRONIC, PS G2 175W MH ELECTRONIC, PS L 32W T ELECTRONIC, PS S5 100W MH ED ELECTRONIC, PS NOTES; 1. ALL LAMPS ARE 3000K UNLESS OTHERWISE SPECIFIED. Lighting Control: The controls implemented in the CSC meet ASHRAE/IESNA Standard 90.1 shutoff requirements. Occupancy sensors in restrooms and offices turn lighting off within 30 minutes of an occupant leaving that space. The atrium and perimeter offices, which have the potential to receive high amounts of daylight, use photosensors to control electric light levels. Much of the lighting, including exterior, is placed on astronomical time clocks. In most cases, decorative lighting is zoned separately from general lighting. For example, the decorative wall sconces found in the multi-purpose theater are on a separate control device than the general theater lighting. In spaces where multiple luminaires are on the same control device, tandem-wiring of multi-lamp fixtures exists. Remote lighting control is used widely throughout the CSC. A digital electronic time clock is incorporated in order to control and program the entire system. Dimming systems are specified as well. In spaces like the theater, they are based on preset scenes and are controlled by an LCD Wallstation. In spaces with daylighting, a photosensor will help adjust the intensity of the lighting. 15

16 Mechanical and Other Loads: The following tables list the equipment found in the facility that requires electricity for power. This includes mechanical equipment like fan and pumps. Tables also exist for plumbing equipment and the equipment found in the kitchen. Elevators and escalators are included in the architectural portion of the schedules. These items typically require a voltage of 120V or 480V. The tables following include a description of these loads, as well as a total load for each type of equipment. MECHANICAL EQUIPMENT SCHEDULE TAG LOAD DESCRIPTION LOAD LOAD MOTOR ASSUMED POWER LOAD IN LOAD IN VOLTAGE PHASE MAGNITUDE UNITS AMPS FACTOR KVA KW EF-1 TOILET EXHAUST 0.25 HP EF-2 EXHAUST FAN 0.25 HP EF-3 TOILET EXHAUST 0.33 HP EF-4 TOILET EXHAUST 2 HP EF-5 TOILET EXHAUST 0.25 HP EF-6 EXHAUST FAN 1 HP EF-7 EXHAUST FAN 0.25 HP EF-9 EXHAUST FAN 0.25 HP EF-10 FOOD EXHAUST 0.25 HP EF-11 EXHAUST FAN 0.33 HP EF-13 EXHAUST FAN 1 HP EF-14 TOILET EXHAUST 0.25 HP EF-15 EXHAUST FAN 0.75 HP EF-16 EXHAUST FAN 0.33 HP EF-17 EXHAUST FAN 0.33 HP EF-18 EXHAUST FAN 0.25 HP EF-19 EXHAUST FAN 0.33 HP EF-20 EXHAUST FAN 0.5 HP MVF-1 GREENHOUSE FAN 1 HP MVF-2 GREENHOUSE FAN 1 HP MVF-3 GREENHOUSE FAN 1 HP MVF-4 GREENHOUSE FAN 1 HP SEF-1 SOUTH ROOF FAN 10 HP SEF-2 SOUTH ROOF FAN 10 HP SEF-3 SOUTH ROOF FAN 20 HP SEF-4 SOUTH ROOF FAN 20 HP SEF-5 SOUTH ROOF FAN 20 HP SEF-6 SOUTH ROOF FAN 20 HP SEF-7 SOUTH ROOF FAN 20 HP TAG LOAD DESCRIPTION LOAD MAGNITUDE MECHANICAL EQUIPMENT SCHEDULE (CONT) LOAD UNITS MOTOR AMPS VOLTAGE PHASE ASSUMED POWER FACTOR LOAD IN KVA 16 LOAD IN KW

17 SEF-8 SOUTH ROOF FAN 20 HP SEF-9 SOUTH ROOF FAN 20 HP SEF-10 SOUTH ROOF FAN 20 HP SEF-11 SOUTH ROOF FAN 20 HP SEF-12 SOUTH ROOF FAN 20 HP SEF-13 SOUTH ROOF FAN 20 HP SEF-14 SOUTH ROOF FAN 20 HP SPF-1 STAIR 1 FAN 2 HP SPF-2 ROOF FAN 3 HP SPF-3 ROOF FAN 1.5 HP SPF-4 ROOF FAN 1.5 HP SPF-5 ROOF FAN 1.5 HP TF-1 FAN 0.25 HP SF-1 GARAGE EXHAUST 0.25 HP CRC-1 TEL/DATA COOLING 0.75 HP MAU-1 MAKE-UP AIR UNIT 3 HP FPB-A FAN POWERED BOX 0.33 HP FAH-1S LNCH RM SUPPLY 7.5 HP FAH-1R LNCH RM RETURN 5 HP FAH-2S MAIN ENT SUPPLY 15 HP FAH-2R MAIN ENT RETURN 5 HP FAH-3S LOWER EXHIBITS 7.5 HP FAH-3R LOWER EXHIBITS 5 HP FAH-4S NORTH EXHIBITS 30 HP FAH-4R NORTH EXHIBITS 5 HP FAH-5S OFFICES 15 HP FAH-5R OFFICES 5 HP FAH-6S GIFT SHOP 7.5 HP FAH-6R GIFT SHOP 5 HP FAH-7S FUNCTION ROOM 15 HP FAH-7R FUNCTION ROOM 5 HP FAH-8S CAFE 10 HP FAH-8R CAFE 5 HP FAH-9S CHILDREN ZONE 15 HP FAH-9R CHILDREN ZONE 5 HP FAH-10S SOUTH EXHIBITS 25 HP FAH-10R SOUTH EXHIBITS 10 HP FAH-11S SOUTH EXHIBITS 25 HP FAH-11R SOUTH EXHIBITS 10 HP FAH-12S THEATER 10 HP FAH-12R THEATER 5 HP P-1 CHILLED WAT PUMP 30 HP P-2 CHILLED WAT PUMP 30 HP P-3 HOT WATER PUMP 7.5 HP P-4 HOT WATERPUMP 7.5 HP P-5 FUEL CELL PUMP 3 HP UH-A UNIT HEATER 0.05 HP UH-B UNIT HEATER 0.05 HP CUH-A CABINET HEATER 0.1 HP CUH-B CABINET HEATER 0.1 HP CUH-C CABINET HEATER 0.1 HP CUH-D CABINET HEATER 0.1 HP CPW-1 CONDENSATE PUMP 0.5 HP CPW-2 CONDENSATE PUMP 0.5 HP CPW-3 CONDENSATE PUMP 0.5 HP CPW-4 CONDENSATE PUMP 0.5 HP TAG LOAD DESCRIPTION LOAD MAGNITUDE MECHANICAL EQUIPMENT SCHEDULE (CONT) LOAD UNITS MOTOR AMPS VOLTAGE PHASE ASSUMED POWER FACTOR LOAD IN KVA 17 LOAD IN KW

18 CPW-5 CONDENSATE PUMP 0.5 HP CPW-6 CONDENSATE PUMP 0.5 HP CPW-7 CONDENSATE PUMP 0.5 HP CPW-8 CONDENSATE PUMP 0.5 HP CPW-9 STEAM PUMP 1.5 HP FCU-1 SECURITY FAN COIL 0.1 HP FCU-2 SECURITY FAN COIL 0.1 HP FCU-4 LOBBY FAN COIL 0.17 HP FCU-5 LOBBY FAN COIL 0.17 HP FCU-6 LOBBY FAN COIL 0.07 HP FCU-8 CORRIDOR FAN 0.07 HP FCU-9 LOBBY FAN COIL 0.07 HP FCU-10 LOBBY FAN COIL 0.07 HP FCU-11 LOBBY FAN COIL 0.17 HP FCU-12 LOBBY FAN COIL 0.17 HP FCU-13 EXHIBIT COIL 0.75 HP FCU-14 EXHIBIT COIL 0.75 HP FCU-15 MACHINE ROOM 0.06 HP FCU-16 CORRIDOR 0.03 HP FCU-17 KITCHEN 0.03 HP FCU-18 LOCKERS FAN COIL 0.03 HP FCU-19 OFFICE FAN COIL 0.03 HP FCU-20 SUPPORT FAN COIL 0.2 HP FCU-21 SUPPORT FAN COIL 0.2 HP FCU-23 RECEIVING FAN C 0.07 HP FCU-24 ELEV 8 FAN COIL 0.06 HP FCU-25 ELEC 108 FAN COIL 0.06 HP FCU-26 TEL/DATA FAN COIL 0.06 HP FCU-27 ELEC FAN COIL 0.06 HP FCU-28 TEL/DATA FAN COIL 0.06 HP FCU-29 ELEV6 FAN COIL 0.06 HP FCU-30 TEL/DATA FAN COIL 0.06 HP FCU- 31 ELEC FAN COIL 0.06 HP FCU-32 ELEC FAN COIL 0.06 HP FCU-33 TEL/DATA FAN COIL 0.06 HP FCU-34 ELEV FAN COIL 0.06 HP FCU-35 ELEC FAN COIL 0.06 HP FCU-36 TEL/DATA FAN COIL 0.06 HP FCU-A (13) BRIDGE COIL 0.5 HP BCU-1 VESTIBULE FAN 0.75 HP BCU-2 EXHIBIT FAN COIL 1 HP TOTAL LOAD: (KW) PLUMBING EQUIPMENT SCHEDULE 18

19 TAG LOAD DESCRIPTION LOAD LOAD MOTOR ASSUMED POWER LOAD IN LOAD IN VOLTAGE PHASE MAGNITUDE UNITS AMPS FACTOR KVA KW HWP-1 HOT WATER PUMP HP SE-1 SEWAGE EJECTOR 1.5 HP SP-1 SUMP PUMP-ELEC 0.33 HP TOTAL LOAD: 3.08 (KW) KITCHEN EQUIPMENT SCHEDULE TAG LOAD DESCRIPTION LOAD LOAD MOTOR ASSUMED POWER LOAD IN LOAD IN VOLTAGE PHASE MAGNITUDE UNITS AMPS FACTOR KVA KW K-1 CONDENSOR 6 A K-2 CONDENSOR 6 A K-4 EVAPORATOR 11 A K-7 COOLER/FREEZER 15 A K-8 ICE MACHINE 14 A K-10 OVEN/STEAMER 10 A K-13 KETTLE 81.6 A K-14 EXHAUST HOOD 9 A K-15 HOT FOOD CABINET 12 A K-18 MIXER 6.2 A K-19 VEG PROCESSOR 5.6 A K-20 COFFEE BREWER 19.6 A K-21 SLICER 7 A K-25 DISPOSER 3.3 A K-27 WAREWASHER 24.6 A K-29 REFRIGERATOR 9.4 A K-35 BOOSTER HEATER 29 A K-38 REFRIGERATOR 7 A TOTAL LOAD: (KW) ARCHITECTURAL EQUIPMENT SCHEDULE TAG LOAD DESCRIPTION LOAD LOAD MOTOR ASSUMED POWER LOAD IN LOAD IN VOLTAGE PHASE MAGNITUDE UNITS AMPS FACTOR KVA KW ELEV1 HYDRAULIC ELEV 50 HP ELEV2 HYDRAULIC ELEV 50 HP ELEV3 TRACTION ELEV 50 HP ELEV4 TRACTION ELEV 50 HP ELEV5 TRACTION ELEV 50 HP ELEV6 TRACTION ELEV 50 HP ELEV7 HYDRAULIC ELEV 50 HP ELEV8 HYDRAULIC ELEV 50 HP ELEV9 FREIGHT ELEV 50 HP ELEVD HYDRAULIC ELEV 50 HP ESC ESCALATOR 100 HP TOTAL LOAD: (KW) 19

20 Service Entrance: The service entrance will be sized using three different methods. The total calculated load will vary dependent upon the method used. The square foot method is used during schematic design of a project and depends on the building type and square footage. The next method, NEC Loading, is a part of design development. The load type and the area of the space containing that load are necessary to compute the demand load. The method used on working drawings should be the closest to the actual service size found in the building. This is because the actual loads are taken from the panel boards and then multiplied by demand factors that take usage into account. Calculating some of the loads that can be spread throughout the panel boards became very difficult to determine, therefore the demand loads from the NEC Loading Method were used. These loads are considered demand, and did not need another demand factor applied. Loads with only circuit breaker sizes available were multiplied by a factor of 0.8. Another important point to make is the fact that the service entrance was calculated specifically for the museum space. Since the connected parking garage has its own distribution panel, it was possible to separate the loads for the garage from those of the museum space. Items located in the garage were specifically excluded from actual loading calculations. LOAD PER SQUARE FOOT: CONCEPTUAL PHASE BUILDING TYPE AREA (SQ. FT.) VA/ SQ. FT. VA MUSEUM TOTAL KVA 2184 TOTAL CURRENT AT 480V NEC LOADING: DESIGN DEVELOPMENT LOAD TYPE AREA (SQ FT) VA/SQ FT VA LIGHTING RECEPTACLES HEATING FANS & PUMPS KITCHEN EQUIP TOTAL KVA TOTAL 480V

21 NOTES: (1) Fans and pumps include plumbing and mechanical equipment ACTUAL LOADING: WORKING DRAWINGS LOAD TYPE DEMAND FACTOR CONNECTED DEMAND LOAD LOAD (VA) (VA) LIGHTING RECEPTACLES HEATING FANS & PUMPS ELEVATORS ESCALATORS KITCHEN EQUIP TOTAL KVA TOTAL 480V SERVICE ENTRANCE SIZE PHASE LOAD (KVA) VOLTAGE SYSTEM (V) LOAD (A) CONCEPTUAL DESIGN DEVELOPMENT WORKING DRAWINGS ACTUAL SERVICE VA PER SQ FT (TOTAL OF 156,000 SQ FT) 15.9 Looking at each of the three methods, NEC Loading resulted in the smallest total load. This could be because of the fact that some of the equipment and other item requiring power were underestimated by the NEC Loading Method. The square footage method and actual loading method had close results. Overall, 21

22 the actual loading method, which included growth, came very close to the size of the service entrance used in the museum portion of the Connecticut Science Center. A growth of twenty-five percent was used, but bringing it down to around twenty would have provided an exact match. Environmental Stewardship Design: The Connecticut Science Center was designed to attain a LEED Rating. Currently, its certification is somewhere around LEED Gold. The architect estimates that the project has the potential to be LEED Platinum rated. However, because of value-engineering, aspects like the fuel cell and photovoltaic panels have had their installation delayed. The lighting equipment was designed to be energy-efficient. High efficacy sources were chosen to optimize the design. Electrical lighting and daylighting were integrated to help light many of the spaces. Proper controls allowed daylight to penetrate and energy efficiency greatly improve. These included photosensors and timers. Occupancy sensors also helped efficiency. Additionally, ASHRAE Standard 90.1 was used as a guideline for proper design. Design Issues: The major design issues of the Connecticut Science Center were a result of value-engineering. As the project progressed, the cost began to climb over the budgeted amount by $10-20 million dollars. Therefore, the owner was forced to purchase items a la carte based on their own priorities and cash flow. Using this process, the photovoltaic panels and fuel cell were not immediately purchased. The electrical supply system was designed to function without supplemental power from these sources. However, when they are finally implemented, coordination and installation issues could potentially arise. Single-line Diagram Drawing List: The following drawings were used to prepare the single-line diagram. Copies are located in Appendix A. E401- Electrical One Line Diagram E402- Electrical One Line Diagram E404- Electrical One Line Diagram 22

23 Single-line Diagram: A Single-Line Diagram of the existing distribution system is included in Appendix A. The following schedule describes the feeders tagged in this drawing. Greater than one hundred feeders are used in the Connecticut Science Center; therefore, they are not listed individually. A common sizing method was chosen to be used instead. Feeders to transformers were scheduled separately because they typically do not have a neutral. 23

24 TAG NO. OF SET SIZE CONDUIT (PER SET) TYPE FEEDER SCHEDULE CONDUCTORS (PER SET) PHASE CONDUCTORS NEUTRAL CONDUCTORS GROUND CONDUCTORS NO. SIZE TYPE NO. SIZE TYPE NO. SIZE TYPE SIZE OF OVERCURRENT PROTECTION FRAME OR SWITCH SIZE 15 1 ¾ EMT 3 12AWG CU THWN 1 12AWG CU THWN 1 12AWG CU THWN 15A 15/3P ¾ EMT 3 12AWG CU THWN 1 12AWG CU THWN 1 12AWG CU THWN 20A 20/3P ¾ EMT 3 12AWG CU THWN 1 12AWG CU THWN 1 12AWG CU THWN 20A 20/3P (1) 25 1 ¾ EMT 3 10AWG CU THWN 1 10AWG CU THWN 1 10AWG CU THWN 25A 25/3P 30 1 ¾ EMT 3 10AWG CU THWN 1 10AWG CU THWN 1 10AWG CU THWN 30A 30/3P 35 1 ¾ EMT 3 8AWG CU THWN 1 8AWG CU THWN 1 10AWG CU THWN 35A 40/3P 40 1 ¾ EMT 3 8AWG CU THWN 1 8AWG CU THWN 1 10AWG CU THWN 40A 40/3P EMT 3 6AWG CU THWN 1 6AWG CU THWN 1 10AWG CU THWN 45A 45/3P EMT 3 6AWG CU THWN 1 6AWG CU THWN 1 10AWG CU THWN 50A 50/3P ¼ EMT 3 4AWG CU THWN 1 4AWG CU THWN 1 10AWG CU THWN 60A 60/3P ¼ EMT 3 4AWG CU THWN 1 4AWG CU THWN 1 8AWG CU THWN 70A 70/3P ¼ EMT 3 4AWG CU THWN 0 4AWG CU THWN 1 8AWG CU THWN 70A 70/3P (1) ¼ EMT 3 3AWG CU THWN 1 3AWG CU THWN 1 8AWG CU THWN 80A 80/3P ½ EMT 3 2AWG CU THWN 1 2AWG CU THWN 1 8AWG CU THWN 90A 90/3P EMT 3 1AWG CU THWN 1 1AWG CU THWN 1 8AWG CU THWN 100A 100/3P EMT 3 1AWG CU THWN 1 1AWG CU THWN 1 6AWG CU THWN 110A 110/3P EMT 3 1/0AWG CU THWN 1 1/0AWG CU THWN 1 6AWG CU THWN 125A 125/3P EMT 3 1/0AWG CU THWN 0 1/0AWG CU THWN 1 6AWG CU THWN 125A 125/3P (1) EMT 3 1/0AWG CU THWN 1 1/0AWG CU THWN 1 6AWG CU THWN 150A 150/3P EMT 3 1/0AWG CU THWN 0 1/0AWG CU THWN 1 6AWG CU THWN 150A 150/3P (1) EMT 3 2/0AWG CU THWN 1 2/0AWG CU THWN 1 6AWG CU THWN 175A 175/3P EMT 3 2/0AWG CU THWN 0 2/0AWG CU THWN 1 6AWG CU THWN 175A 175/3P (1) ½ EMT 3 3/0AWG CU THWN 1 3/0AWG CU THWN 1 6AWG CU THWN 200A 200/3P ½ EMT 3 4/0AWG CU THWN 1 4/0AWG CU THWN 1 4AWG CU THWN 225A 225/3P EMT 3 250KCMIL CU THWN 1 250KCMIL CU THWN 1 4AWG CU THWN 250A 250/3P EMT 3 350KCMIL CU THWN 1 350KCMIL CU THWN 1 4AWG CU THWN 300A 300/3P EMT 3 500KCMIL CU THWN 1 500KCMIL CU THWN 1 3AWG CU THWN 350A 350/3P EMT 3 500KCMIL CU THWN 1 500KCMIL CU THWN 1 3AWG CU THWN 400A 400/3P EMT 3 600KCMIL CU THWN 1 600KCMIL CU THWN 1 3AWG CU THWN 400A 400/3P EMT 3 4/0AWG CU THWN 1 4/0AWG CU THWN 1 2AWG CU THWN 450A 450/3P EMT 3 250KCMIL CU THWN 1 250KCMIL CU THWN 1 2AWG CU THWN 500A 500/3P EMT 3 350KCMIL CU THWN 1 350KCMIL CU THWN 1 1AWG CU THWN 600A 600/3P EMT 3 500KCMIL CU THWN 1 500KCMIL CU THWN 1 1/0AWG CU THWN 700A 700/3P EMT 3 500KCMIL CU THWN 1 500KCMIL CU THWN 1 1/0AWG CU THWN 800A 800/3P EMT 3 600KCMIL CU THWN 1 600KCMIL CU THWN 1 1/0AWG CU THWN 800A 800/3P EMT 3 350KCMIL CU THWN 1 350KCMIL CU THWN 1 2/0AWG CU THWN 900A 900/3P EMT 3 500KCMIL CU THWN 1 500KCMIL CU THWN 1 2/0AWG CU THWN 1000A 1000/3P EMT 3 600KCMIL CU THWN 1 600KCMIL CU THWN 1 3/0AWG CU THWN 1600A 1600/3P EMT 3 600KCMIL CU THWN 1 600KCMIL CU THWN 1 4/0AWG CU THWN 1600A 1600/3P EMT 3 600KCMIL CU THWN 1 600KCMIL CU THWN 1 4/0AWG CU THWN 2000A 2000/3P NOTES: (1) FEEDER IS SUPPLYING A TRANSFORMER AND A NEUTRAL CONDUCTOR IS NOT PRESENT. REMARKS 24

25 P a r t T w o : C o m m u n i c a t i o n S y s t e m s Fire Alarm System: The Connecticut Science Center has an audible fire alarm system that is ADA approved. It consists of various activation sequences. Audible notification sounds a repetitious tone and voice message. Xenon strobes display a continuous visible pattern. Manual pull stations, photoelectric smoke detectors, and smoke detectors mounted in duct initiate the alarm. A signal to notify a central station is sent. If necessary, sprinklers concealed in ceilings or wall mounted are activated. AHUs larger than 2000CFM are automatically shutdown. Elevator cabs are recalled. The main fire alarm panel is found in the security station in Garage Level One and all other system components are located throughout the CSC according to code. Telecommunications: Telecommunications enter the building at Parking Garage Level One where the main telecommunications room is located. Typically, two telecommunications closets are located on each floor. One is for the north exhibit spaces, while the other is for the south exhibit spaces. Offices and learning spaces are equipped with wall or floor-mounted telecommunications outlets. Wireless possibilities are available in conference and exhibit spaces. Payphones are accessible to patrons in the atrium. Security Systems: The security for the CSC is based in the security station on Garage Level One. Closed circuit television, as well as card swipe access for employees, is common. Alarm systems and monitors help to aid in making the building secure. At the ticketing entrance, a verifying alarm is employed. 25

26 Audiovisual System: The audiovisual system is utilized extensively throughout. Loudspeakers are present in many of the spaces for paging and background music. Floorboxes to handle power and audiovisual for multimedia use are found in conference, training, function, theater, lunch, and learning rooms. Many of these rooms are anticipated to have projection screens for presentations. Microphones, touch panels, and plasma displays are featured in exhibit spaces. 26

27 A p p e n d i x A : S i n g l e- L i n e D i a g r a m 27

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29 CONNECTICUT CENTER FOR SCIENCE & EXPLORATION 05/16/08 BULLETIN /08/07 BULLETIN 151 UTC CLARIFICATIONS 06/20/07 BULLETIN /18/07 BULLETIN /25/06 BULLETIN 23 08/21/06 100% CONSTRUCTION DOCUMENTS 7 08/01/06 PROGRESS PRINTING /19/06 07/07/06 Garage Construction Set PROGRESS PRINTING 4 06/13/06 Garage Construction Set ISSUED FOR BID PACKAGE 3A 03/17/06 Bid Package 2 Reissued 02/20/06 Bid Package 2 Bulletin 2 NO. DATE REVISION ISSUE/REVISION KEY PLAN DRAWING TITLE ELECTRICAL ONE LINE DIAGRAM SCALE NONE PROJECT NUMBER DATE /21/ EOP1 DRAWING NUMBER E401

30 CONNECTICUT CENTER FOR SCIENCE & EXPLORATION 10/16/08 BULLETIN /16/08 BULLETIN /13/07 BULLETIN /25/06 BULLETIN 23 08/21/06 100% CONSTRUCTION DOCUMENTS 7 08/01/06 PROGRESS PRINTING 6 07/19/ /07/06 Garage Construction Set PROGRESS PRINTING 4 06/13/06 Garage Construction Set /17/06 02/20/06 ISSUED FOR BID PACKAGE 3A Bid Package 2 Reissued Bid Package 2 Bulletin 2 NO. DATE REVISION ISSUE/REVISION KEY PLAN DRAWING TITLE ELECTRICAL ONE LINE DIAGRAM SCALE NONE PROJECT NUMBER 0416 DATE 08/21/ EOP2 DRAWING NUMBER E403