General Purpose Transformers 6

Transcription

1 General Purpose Transformers 6 Description Dry-type transformers (en cap su lat ed, ventilated or non-ventilated), 600 Volt Class, isolation type, single and three phase, through 500. Indoor and outdoor models available. Applications Any situation where the available voltage must be changed to accommodate the voltage required by the specifi c elec tri cal circuit or connected equipment. For many elec tri cal circuits, the National trical Code (NEC) requires a separately derived neutral secondary connection provided by Delta-Wye connected transformers. Typical applications include: Hospitals Industrial Plants Commercial Buildings Apartment Buildings Institutional Buildings Offi ce Buildings Schools Shopping Centers High Rise Buildings General purpose transformers can be located close to the load. No vaults are required for installation and no long, ex pen sive feeder lines are needed. Common ap pli ca tions include inductive and re sis tive loads such as motors, lighting and heating. Hevi-Duty general purpose transformers are manufactured to meet applicable industry standards, are listed in accordance with UL 506 and UL 1561 specifi cations and are classifi ed as isolation transformers. Selection Steps A. An online transformer product selector is available in the Transformer section of our website or you can use the following steps below to manually select a trans form er. (1Ø) Volts x 1000 This information is available from the equipment manufacturer and is typically listed on the nameplate of the equip ment. C. Know the supply voltage con di tions: 1. Available source voltage. 2. Available source fre quen cy (a transformer will not change frequency. The frequency of the supply voltage and the needed load voltage must be equal). 3. of phases on power source. D. Determine the transformer rating: 1. If the load is expressed in, select the appropriate transformer from the following selection charts (make sure the selected transformer s rating is equal to or greater than the required load ). 2. If the load is expressed in amperage, use either the appropriate formula listed below or the appropriate sizing chart on the next page. B. Find the elec tri cal load re quire ments. These are: (3Ø) = Volts x x Load operating voltage. 2. Load frequency (ex pressed in Hz). 3. Determine load size - usually expressed in, amperage or horsepower. 4. Is the load designed to operate on single phase or three phase power? Always size the transformer to the load requirements. 3. If the load is expressed in wattage, either utilize the formula below to convert to or refer to the equipment nameplate to obtain amperage requirement. Wattage = (1000 x Power Factor of the load) 4. If the load is a motor and expressed in horse pow er, refer to the motor horsepower charts on the next page. Some sizes may require an optional weather shield (order separately) for outdoor use. contact Technical Services at (800) with any ques tions. 147

2 6 General Purpose Transformers Single Phase: Full Load Current Chart Rating V 208 V 240 V 277 V 480 V 600 V Amperes Three Phase: Full Load Current Chart Rating 208 V 240 V 480 V 600 V Amperes Single Phase Motor Chart: AC, Motor Horsepower Amperage Horse Power 115 V 208 V 230 V 460 V 575 V Mini Tfmr. Three Phase Motor Chart: AC, Motor Horsepower Amperage Std. NEMA Size 1/ ¼ / ½ ¾ ½ Horse Power 208 V 230 V 460 V 575 V Mini Tfmr. Std. NEMA Size ½ ¾ ½ ½ Three things to keep in mind: A. Motor horsepower charts are based on 1800 RPM squirrel cage induction motors. If using another type of motor, check running amperage against the chart and adjust as nec es sary. B. Increase required trans form er by 20% if motors are started more than once per hour. C. If your motor service factor is greater than 1, pro por tion al ly increase full load am per age. (i.e. if service factor is 1.10, increase full load am per age by 10%). Are there any special application considerations? A. For am bi ent con di tions over 40 C, derate the trans form er nameplate by 8% for each 10 C above 40 C. B. For high altitude ap pli ca tions, derate the transformer nameplate by 0.3% for every 330 feet over 3300 feet above sea level. This assures proper trans form er convection cooling. C. Some applications may require a transformer design that limits the BTU output of the unit at full load or a design to withstand and mitigate specifi c electrical anomalies. For these applications, see the Special Ap pli ca tion Transformers section (Chapter 7). 148 contact Technical Services at (800) with any questions.

3 6 General Purpose Transformers Selection Tables: Single Phase Group x 480 Volt, /240, 60 Hz.050 HS1B50 Weather Shield Non-Encapsulated / / HS1B / / HS1B100 N/A / / HS1B / / HS1B / /1.04 Encapsulated (See the Hazardous Location section for higher units).500 HS1F500B / / HS1F750B / / HS1F1BS / / HS1F1.5AS / / HS1F2AS N/A / / HS5F3AS / / HS5F5AS / / HS5F7.5AS / / HS5F10AS / / S5H15S WS / / S5H25S WS / / S5H37S WS /78 313/ S5H50S WS / / S5H75S WS / / S5H100S WS / / S5H167S WS / /695 Group 2 /208/240/277 Volt, /240, 60 Hz * Weather shields (set of two) must be ordered sep a rate ly. **Amperage calculated at 277 Volts on primary. Encapsulated 1 HS12F1BS / HS12F1.5AS / HS12F2AS / HS12F3AS N/A / HS12F5AS / HS12F7.5AS / HS12F10AS / S12H15S WS / S12H25S WS / contact Technical Services at (800) with any questions.

4 General Purpose Transformers 6 Selection Tables: Single Phase Group Volt, /240, 60 Hz.100 HS10B100 Weather Shield* Non-Encapsulated Approx. (lbs) ** / HS10B150 N/A / HS10B /1.04 Encapsulated.500 HS10F500B / HS10F750B / HS10F1BS / HS10F1.5AS / HS10F2AS N/A / HS10F3AS / HS10F5AS / HS10F7.5AS / HS10F10AS / S10H15S WS / S10H25S WS / S10H37S WS / S10H50S WS / S10H75S WS / S10H100S WS / S10H167S WS /695 * Weather shields (set of two) must be ordered sep a rate ly. ** Amperage calculated at 277 Volts on primary. Group 4 Export 190/200/208/220/380/400/415/440 Volt, 110/220, 50/60 Hz Copper wound ** Encapsulated, Copper Wound 1 HS14F1BS N/A / / HS14F1.5BS N/A / /6.8 2 HS14F2BS N/A / /9.1 3 HS14F3BS N/A / / HS14F5BS N/A / / HS14F7.5BS N/A / / HS14F10BS N/A / /45.5, Not Copper Wound 15 S14H15S WS / / S14H25S WS / /113.6 * Weather shields (set of two) must be ordered separately. ** Amperage calculated at 220/440 Volts on primary. UL Listed, CSA Certifi ed and CE Marked. 240 & 480 V not available at 50 Hz. contact Technical Services at (800) with any ques tions. 155

5 6 General Purpose Transformers Selection Tables: Three Phase Group A 208, 480Y/277, 60 Hz 9 HT84F9AS N/A T84H15S WS T84H30S WS T84H45S WS T84H75S WS T84H112S WS T84H150S WS * Weather shields (set of two) must be ordered separately. Group B 240, 208Y/, 60 Hz 9 HT6F9AS N/A T6H15S WS T6H30S WS T6H45S WS T6H75S WS T6H112S WS T6H150S WS * Weather shields (set of two) must be ordered separately. Group C 480 Volt, 208Y/, 60 Hz Encapsulated (May be used with a 480Y/277 VAC Supply) 3 HT1F3AS Copper-Wound AL Encapsulated (See the Hazardous Location section for higer units) HT1F6AS N/A N/A HT1F9AS T2H15S T2H15SCU WS T2H30S T2H30SCU WS T2H45S T2H45SCU WS T2H75S T2H75SCU WS T2H112S T2H112SCU WS T2H150S T2H150SCU WS T2H225S T2H225SCU WS T2H300S T2H300SCU WS T2H500S T2H500SCU WS * Weather shields (set of two) must be ordered separately. 156 contact Technical Services at (800) with any questions.

6 General Purpose Transformers 6 Selection Tables: Three Phase Group D 480 Volt, 240 Volt, with Reduced Capacity Center Tap*, 60 Hz 3 HT5F3AS Copper-Wound Weather Shield** * See the Technical Notes section with respect to capacity of center tap. ** Weather shield (set of two) must be ordered separately. AL/CU Encapsulated (See the Hazardous Location section for higher units HT5F6AS N/A N/A HT5F9AS T5H15S T5H15SCU WS / T5H30S T5H30SCU WS / T5H45S T5H45SCU WS / T5H75S T5H75SCU WS / T5H112S T5H112SCU WS / T5H150S T5H150SCU WS / T5H225S T5H225SCU WS / T5H300S T5H300SCU WS / T5H500S T5H500SCU WS / Group E 208 Volt, 208Y/, 60 Hz 15 T3H15S WS T3H30S WS T3H45S WS T3H75S WS T3H112S WS * Weather shield (set of two) must be ordered separately. Group F 480, 380Y/220, 60 Hz 9 HT79F9AS N/A T79H15S WS T79H30S WS T79H45S WS T79H75S WS * Weather shield (set of two) must be ordered separately. contact Technical Services at (800) with any ques tions. 157

7 6 General Purpose Transformers Selection Tables: Three Phase Group G 480 Volt, 480Y/277, 60 Hz 15 T81H15S WS T81H30S WS T81H45S WS T81H75S WS T81H112S WS T81H150S WS T81H225S WS T81H300S WS T81H500S WS * Weather shield (set of two) must be ordered separately. Group H 600 Volt, 208Y/, 60 Hz 3 HT7F3AS Encapsulated HT7F6AS N/A HT7F9AS T7H15S WS T7H30S WS T7H45S WS T7H75S WS T7H112S WS T7H150S WS T7H225S WS T7H300S WS T7H500S WS * Weather shield (set of two) must be ordered separately. Group I 600, 380Y/220 or 480Y/277, 60 Hz 15 T77H15S WS T77H30S WS T77H45S WS T77H75S WS * Weather shield (set of two) must be ordered separately. 158 contact Technical Services at (800) with any questions.

8 General Purpose Transformers 6 trical ections (Single Phase) 240 X 480 Volt /240 Volt 240 X 480 Volt /240 Volt 240 X 480 Volt /240 Volt Taps: 2, 2½% FCAN & FCBN H2 to H3 H1 & H4 240 H1 to H3 H2 to H4 H1 & H4 240 X3-0- X3 240 X 480 Volt, /240 Volt Taps: 2, 2½% FCAN; 4, 2½% FCBN H2 to H3 H1 & H4 240 H1 to H3 H2 to H4 H1 & H4 240 X3-0- X3 240 X 480 Volt, /240 Volt 5 Taps: 2, 2½% FCAN; 4, 2½% FCBN 504 H4 to H5 H1 & H8 492 H3 to H5 H1 & H8 480 H3 to H6 H1 & H8 468 H2 to H6 H1 & H8 456 H2 to H7 H1 & H8 252 H1 to H5 H4 to H8 H1 & H H3 to H8 H1 to H7 H2 to H8 H1 & H8 H1 & H8 240 X3-0- X3 504 H5 to H6 H1 & H H4 to H6 H1 & H H4 to H7 H1 & H H3 to H7 H1 & H H3 to H8 H1 & H H2 to H8 H1 & H H2 to H9 H1 & H H5 to H10 H1 & H H1 to H7 H4 to H10 H1 & H H1 to H8 H3 to H10 H1 & H H1 to H9 H2 to H10 H1 & H X3-0- X to to to to to to to H1 to 2 H2 to H1 to 4 H2 to 3 H1 to 6 H2 to 5 H1 to 8 H2 to X3-0- X3 600 Volt, /240 Volt X3-0- X3 Note: 1 through 2 units have electrostatic shielding. X1, X2 & X4 contact Technical Services at (800) with any ques tions. 159

9 6 General Purpose Transformers trical ections (Single Phase) 600 Volt /240 Volt Taps: 2, 5% FCBN 600 Volt /240 Volt Taps: 2, 2½% FCAN; 4, 2½% FCBN /208/240/277 Volt /240 Volt H3 to H4 H1 & H6 570 H2 to H4 H1 & H6 540 H2 to H5 H1 & H6 240 X3-0- X to to to to to to to X3-0- X3 277 H2 to H3 H1 & H6 240 H2 to H3 H1 & H5 208 H2 to H3 H1 & H4 H1 to H3 H2 to H5 H1 & H5 240 X3-0- X3 /208/240/277 Volt /240 Volt 10 /208/240/277 Volt, /240 Volt H4 to H5 H1 & H8 240 H3 to H6 H1 & H8 208 H2 to H7 H1 & H8 H3 to H8 H1 & H8 240 X3-0- X to to to 6 H1 to 4 3 to H2 240 X3-0- X3 Note: ect the electrostatic shield to the equip ment ground (green) or to both the equipment ground and the system ground (white). Specifi cations are subject to change without notice. 160 contact Technical Services at (800) with any questions.

10 General Purpose Transformers 6 trical ections (Single Phase) 190/200/208/220/380/400/415/440 Volt Pri. 110/220 Volt 190/200/208/220/380/400/415/440 Volt Pri. 110/220 Volt 190/200/208/220/380/400/415/440 Volt Pri. 110/220 Volt H5 to H6 H1 & H H4 to H6 H1 & H9 400 H3 to H6 H1 & H8 380 H2 to H6 H1 & H7 220 H5 to H10 H1 & H H4 to H9 H1 & H H3 to H8 H2 to H7 H1 & H8 H1 & H7 220 X3 110/220 X3 X1, X2 & X H5-H6 H1 & H H4-H7 H1 & H H3-H8 H1 & H H2-H9 H1 & H H1-H6, H5-H10 H1 & H H1-H7, H4-H10 H1 & H H1-H8, H3-H10 H1 & H H1-H9, H2-H10 H1 & H X3 110/220 X3 X1, X2 & X to to to to H1 to 2 1 to H H1 to 4 3 to H2 H1 to 6 5 to H2 H1 to 8 7 to H2 220 X3 110/220 X3 X1, X2 & X4 110 trical ections ( Three Phase) 208 Volt 480Y/277 Volt Taps: 2, 5% FCBN Volt, 480Y/277 Volt Taps: 2, 2½% FCAN; 4, 2½% FCBN X1 & 2-X2 & 3-X3 X1, X2, X X1 & 2-X2 & 6-X3 X1, X2, X X1 & 8-X2 & 9-X3 X1, X2, X3 480 H1, H2, H3 277 H0, H1, H2, H3 X1-X2-X3 Tap Voltage H1-H2-H3 H0-H1,H2,H contact Technical Services at (800) with any ques tions. 161