56857 Catalog
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2014-09-27
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SECTION 2 HPS Universal™ Buck-Boost Transformers Single and Three Phase Potted Buck-Boost Transformers Buck-Boost Applications & Standard Specification....... 82 Selecting Buck-Boost Transformers ............................... 83 Single Phase Selection Tables ........................................ 84 Three Phase Selection Tables ......................................... 87 Single Phase Specification Tables .................................. 90 Three Phase Specification Tables ................................... 91 Single Phase Connection Diagrams ............................... 93 Three Phase Connection Diagrams ................................ 94 Three Phase Buck-Boost Explained ................................ 95 SECTION 2 HPS Universal™ Why Use Buck-Boost Transformers? The advantages of using a buck-boost transformer over an equivalent standard isolation transformer are: SECTION 2 Advantages 1) Used in a variety of applications 2) Inexpensive 3) Smaller and lighter 4) More efficient 5) 5-10 times increase in kVA Disadvantages 1) No circuit isolation 2) Cannot create a neutral 3) KVA and voltages do not match what’s on the nameplate kVA and voltages. Buck-Boost Application Buck-boost transformers offer an economical solution to the adjustment of line voltages that are slightly above or below normal. When a buck-boost transformer is connected as an autotransformer, only a portion of the load kVA is actually transformed. The majority of the load kVA is passed directly through to the source. For this reason a buck-boost transformer may be used to supply a much larger kVA load than is indicated on the nameplate. Buck-boost transformers can be used to adjust stable voltages only. BUCK-BOOST STANDARD SPECIFICATIONS 50 to 1000 VA 1500 to 5000 VA UL Listed File: E50394 File: E50394 CSA Certified File: LR3902 File: LR3902 Frequency 50/60 Hz 50/60 Hz Insulation System 130°C (80°C rise) 180°C (115°C rise) Standard Design Single Phase, welded core construction made with high quality, high permeability silicon steel laminations. Computer designed coils, accurately wound from high quality copper magnetic wire. Single Phase, welded core construction made with high quality, high permeability silicon steel laminations. Computer designed coils, accurately wound from high quality copper magnetic wire. Encapsulation All units from 50VA to 5kVA are encapsulated with electrical grade silica sand and resin compounds. All units from 50VA to 5kVA are encapsulated with electrical grade silica sand and resin compounds. Enclosure Type Heavy Duty NEMA Type 3R Heavy Duty NEMA Type 3R (optional NEMA 4, 4X and 12 available) (optional NEMA 4, 4X and 12 available) Enclosure Finish ANSI 61 Grey, UL50 ANSI 61 Grey, UL50 Termination Front accessible separate high and low voltage lead wires or copper tabs. Front accessible separate high and low voltage lead wires or copper tabs. Conduit Knock-Outs Side and rear standard on all units. Side and rear standard on all units. Mounting Standard Wall Mounting. Standard Wall Mounting. © Hammond Power Solutions Inc. 82 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS Voltage Is the Key Buck-boost transformers represent an economical way to both raise supply voltage caused by line drop or equipment demand on the distribution system, or lower voltage caused by increased system voltages due to supply line adjustments. Some loads including lighting and resistive loads require a stable supply to maintain performance. The detrimental effects of incorrect supply line voltage can cause equipment failure. Buck-boost transformers can correct line voltage within 5 to 25% of nominal. The following information is required before selecting a buck-boost transformer: (1) Line Voltage - The voltage that you want to buck (decrease) or boost (increase). This can be determined by measuring the supply line voltage with a voltmeter. (2) Load Voltage - The voltage at which your equipment is designed to operate. This is listed on the nameplate of the load equipment. (3) Load kVA or Load Amps - You do not need to know both - one or the other is sufficient. This information usually can be found on the nameplate of the equipment that you want to operate. It is the sum of all the equipment that represents the load. (4) Frequency - The supply line frequency must be the same as the equipment to be operated - either 50 or 60 Hertz. (5) Phase - The supply line should be the same as the load - either single or three phase. Four Steps to Select the Correct Buck-Boost Transformer 1. From the top row of each “Selection Chart”, select a ‘high voltage’ and ‘low voltage’ combination that is the closest to matching the high voltage and low voltage correction that is required for your application. 2. Move down that column to the kVA or current rating equal to, or greater than, the rating required by the total load. It is not likely that the exact value of the load will be found, so go to the next higher rating. 3. From the far left column, select the corresponding catalog number of the exact buck-boost transformer required. Refer to specification tables for dimensional information. 4. Connect the transformer in accordance with the connection diagram referenced at the bottom of the same column where you selected your high voltage and low voltage combination. Connection diagrams are on pages 93 and 94 in this catalog section. They are also packaged with each transformer. © Hammond Power Solutions Inc. 83 Data subject to change without notice. SECTION 2 Steps for Selecting Buck-Boost Transformers SECTION 2 HPS Universal™ How to use the Selection Chart 1. From the top row of the “Selection Chart” locate the high and low voltage combination that is closest to the one you require. 2. Move down that column to the kVA or Ampere rating equal to or greater than the rating required by the load. 3. From the far left column, obtain the transformer catalog number. 4. For dimensional information refer to the specifications table (Group A) on page 90. 5. The corresponding connection diagram is indicated at the bottom of the Voltage / kVA column. See page 93 for the connection diagrams. SECTION 2 Single Phase - Group A Selection Chart Catalog Low Voltage 96 100 100 105 110 110 115 115 120 120 200 208 220 220 240 240 Number High Voltage 115 110 120 115 121 132 126 138 132 144 220 229 231 242 252 264 2.08 4.17 2.08 4.17 4.17 2.08 4.17 2.08 4.17 2.08 2.08 2.08 4.17 2.08 4.17 2.08 KVA .240 LV Amps 2.50 HV Amps 4.17 QC10ERCB KVA .480 LV Amps 5.00 .458 4.58 8.33 .917 9.17 .250 2.50 4.17 .500 5.00 .480 4.58 8.33 .961 9.17 .504 4.58 8.33 1.01 9.17 .275 2.50 4.17 .550 5.00 .526 4.58 8.33 1.05 9.17 .288 2.50 4.17 .575 5.00 .458 2.29 4.17 .917 4.58 HV Amps QC05ERCB HV Amps .550 4.58 8.33 1.10 9.17 .300 2.50 4.17 .600 5.00 .477 2.29 4.17 .953 4.58 .963 4.38 8.33 1.92 8.75 .504 2.29 4.17 1.01 4.58 1.05 4.38 8.33 2.10 8.75 .550 2.29 4.17 1.10 4.58 6.25 12.5 6.25 12.5 12.5 6.25 12.5 6.25 12.5 6.25 6.25 6.25 12.5 6.25 12.5 6.25 KVA .720 1.38 .750 1.44 1.51 .825 1.58 .863 1.65 .900 1.38 1.43 2.88 1.51 3.15 1.65 7.50 13.8 7.50 13.8 13.8 7.50 13.8 7.50 13.8 7.50 6.88 6.88 13.1 6.88 13.1 6.88 8.33 QC20ERCB KVA .960 LV Amps 10.0 HV Amps 10.4 KVA 1.20 QC25ERCB LV Amps 12.5 16.7 1.83 18.3 20.8 2.29 8.33 1.00 10.0 10.4 1.25 16.7 1.92 18.3 20.8 2.40 16.7 2.02 18.3 20.8 2.52 8.33 1.10 10.0 10.4 1.37 16.7 2.11 18.3 20.8 2.63 8.33 1.15 10.0 10.4 1.44 8.33 1.83 9.17 10.4 2.29 22.9 12.5 22.9 22.9 12.5 22.9 12.5 22.9 12.5 11.4 11.4 21.8 11.4 21.8 11.4 29.2 3.21 32.1 41.6 4.58 45.8 14.6 1.75 17.5 20.8 2.50 25.0 29.2 3.36 32.1 41.7 4.80 45.8 29.2 3.53 32.1 41.7 5.04 45.8 14.6 1.92 17.5 20.8 2.75 25.0 29.2 3.68 32.1 41.7 5.26 45.8 14.6 2.01 17.5 20.8 2.87 25.0 14.6 3.21 16.0 20.8 4.58 22.9 14.6 3.34 16.0 20.8 4.77 22.9 QC15ERCB LV Amps HV Amps HV Amps 14.6 QC35ERCB KVA 1.68 LV Amps 17.5 HV Amps 20.8 QC50ERCB KVA 2.39 LV Amps 24.9 HV Amps QC75ERCB 14.6 3.53 16.0 20.8 5.04 22.9 16.7 4.20 17.5 20.8 5.25 29.2 7.35 30.6 41.7 10.5 43.7 8.33 2.20 9.17 10.4 2.75 14.6 3.85 16.0 20.8 5.50 22.9 31.2 62.5 62.5 31.2 62.5 31.2 62.5 31.2 3.75 7.20 7.56 4.12 7.89 4.31 8.25 4.50 6.87 7.15 14.4 7.56 15.7 8.25 37.5 41.7 4.80 50.0 62.5 7.20 75.0 83.3 9.58 99.8 125 14.4 150 208 24.0 68.7 83.3 9.17 91.7 125 13.7 137 166 18.3 183 250 27.5 275 417 45.8 37.5 41.7 5.00 50.0 62.5 7.50 75.0 83.3 10.0 100 125 15.0 150 208 25.0 68.7 83.3 9.60 91.7 125 14.4 137 166 19.2 183 250 28.8 275 417 48.0 68.7 83.3 10.1 91.7 125 15.1 137 166 20.1 183 250 30.2 275 417 50.4 37.5 41.7 5.50 50.0 62.5 8.25 75.0 83.3 11.0 100 125 16.5 150 208 27.5 68.7 83.3 10.5 91.7 125 15.8 137 166 21.0 183 250 31.5 275 417 52.7 37.5 41.7 5.75 50.0 62.5 8.62 75.0 83.3 11.5 100 125 17.2 150 208 28.7 68.7 83.3 11.0 91.7 125 16.5 137 166 22.0 183 250 33.0 275 417 55.0 37.5 41.7 6.00 50.0 62.5 9.00 75.0 83.3 12.0 100 125 18.0 150 208 30.0 34.4 41.7 9.17 45.8 62.5 13.7 68.7 83.3 18.3 91.7 125 27.5 137 208 45.8 34.4 41.7 9.53 45.8 62.5 14.3 68.8 83.3 19.0 91.7 125 28.6 137 208 47.7 65.6 83.3 19.2 87.5 125 28.9 131 166 38.5 175 250 57.7 262 417 96.3 34.4 41.7 10.1 45.8 62.5 15.1 68.7 83.3 20.1 91.6 125 30.2 137 208 50.4 65.6 83.3 21.0 87.5 125 31.5 131 166 42.0 175 250 63.0 262 417 105 34.4 41.7 11.0 45.8 62.5 16.5 68.7 83.3 22.0 91.6 125 33.0 137 208 55.0 250 458 250 458 458 250 458 250 458 250 229 229 438 229 438 229 2 1 2 1 1 2 1 2 1 2 4 4 3 4 3 4 KVA KVA LV Amps HV Amps KVA LV Amps HV Amps Q005ERCF 29.2 6.74 30.6 41.7 9.62 43.7 8.33 2.02 9.17 10.4 2.52 6.87 LV Amps HV Amps Q003ERCF 16.7 3.85 17.5 20.8 4.81 62.5 KVA Q002ERCF 14.6 2.10 17.5 20.8 3.00 25.0 8.33 1.91 9.17 10.4 2.38 31.2 LV Amps HV Amps Q1C5ERCF 29.2 3.85 32.1 41.7 5.50 45.8 8.33 1.20 10.0 10.4 1.50 KVA 3.60 LV Amps HV Amps Q1C0ERCB 16.7 2.20 18.3 20.8 2.75 KVA LV Amps CONNECTION DIAGRAM © Hammond Power Solutions Inc. 84 31.2 31.2 62.5 31.2 62.5 31.2 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS How to use the Selection Chart 1. From the top row of the “Selection Chart” locate the high and low voltage combination that is closest to the one you require. 2. Move down that column to the kVA or Ampere rating equal to or greater than the rating required by the load. 3. From the far left column, obtain the transformer catalog number. 4. For dimensional information refer to the specifications table (Group B) on page 90. 5. The corresponding connection diagram is indicated at the bottom of the Voltage / kVA column. See page 93 for the connection diagrams. Single Phase - Group B Selection Chart Low Voltage 95 101 106 110 110 115 115 120 120 203 208 220 220 230 240 240 Number High Voltage 120 115 120 125 139 130 146 136 152 230 236 235 249 261 256 272 HV Amps 1.56 3.13 3.13 3.13 1.56 3.13 1.56 3.13 1.56 1.56 KVA .188 LV Amps 1.98 HV Amps 3.12 QC10ESCB KVA .376 LV Amps 3.96 .359 3.54 6.25 .718 7.08 .375 3.54 6.25 .751 7.08 .390 3.54 6.25 .779 7.08 .218 1.98 3.12 .435 3.96 .407 3.54 6.25 .815 7.08 .228 1.98 3.12 .455 3.96 .425 3.54 6.25 .850 7.08 QC05ESCB HV Amps .238 1.98 3.12 .475 3.96 1.56 3.13 1.56 1.56 3.13 1.56 .359 .368 .733 1.77 1.77 3.33 3.12 3.12 6.25 .719 .737 1.47 3.54 3.54 6.67 .390 1.77 3.12 .779 3.54 .407 1.77 3.12 .815 3.54 .800 3.33 6.25 1.60 6.67 .425 1.77 3.12 .850 3.54 4.69 9.38 9.38 9.38 4.69 9.38 4.69 9.38 4.69 4.69 4.69 9.38 4.69 4.69 9.38 4.69 KVA .564 1.07 1.13 1.17 .653 1.22 .683 1.28 .713 1.08 1.10 2.20 1.17 1.22 2.40 1.28 5.94 10.6 10.6 10.6 5.94 10.6 5.94 10.6 5.94 5.31 5.31 10.0 5.31 5.31 10.0 5.31 6.25 QC20ESCB KVA .752 LV Amps 7.92 HV Amps 7.81 KVA 0.94 QC25ESCB LV Amps 9.90 12.5 1.43 14.2 15.6 1.80 12.5 1.50 14.2 15.6 1.87 12.5 1.56 14.2 15.6 1.95 6.25 0.871 7.92 7.81 1.09 12.5 1.63 14.2 15.6 2.04 6.25 0.91 7.92 7.81 1.14 12.5 1.70 14.2 15.6 2.12 6.25 1.47 7.08 7.81 1.84 17.7 17.7 17.7 9.87 17.7 9.90 17.7 9.90 8.85 8.85 16.7 8.85 8.85 16.7 8.85 21.9 2.51 24.8 31.2 3.59 35.4 21.9 2.63 24.8 31.2 3.75 35.4 21.9 2.73 24.8 31.2 3.90 35.4 10.9 1.52 13.9 15.6 2.18 19.8 21.9 2.85 24.8 31.2 4.07 35.4 10.9 1.59 13.9 15.6 2.28 19.8 21.9 2.98 24.8 31.2 4.25 35.4 10.9 2.58 12.4 15.6 3.68 17.7 46.8 46.8 46.9 23.4 46.9 23.4 46.9 23.4 23.4 QC15ESCB LV Amps HV Amps HV Amps 10.9 KVA 1.31 LV Amps 13.9 HV Amps 15.6 QC50ESCB KVA 1.88 LV Amps 19.8 QC35ESCB HV Amps QC75ESCB 23.4 10.9 2.85 12.4 15.6 4.07 17.7 12.5 3.20 13.3 15.6 4.00 21.9 5.60 23.3 31.2 8.00 33.3 6.25 1.70 7.08 7.81 2.12 10.9 2.98 12.4 15.6 4.25 17.7 23.4 46.9 23.4 23.4 46.9 23.4 5.63 5.84 3.27 6.10 3.41 6.37 3.56 5.39 5.53 11.0 5.84 6.11 12.0 6.37 53.1 62.5 7.50 70.8 93.7 11.2 106 125 15.0 142 187 22.5 212 312 37.5 53.1 62.5 7.79 70.8 93.7 11.7 106 125 15.6 142 187 23.4 212 312 39.0 29.7 31.2 4.35 39.6 46.9 6.53 59.4 62.5 8.71 79.2 93.7 13.0 119 156 21.8 53.1 62.5 8.15 70.8 93.7 12.2 106 125 16.3 142 187 24.4 212 312 40.7 29.7 31.2 4.55 39.6 46.9 6.83 59.4 62.5 9.10 79.2 93.7 13.6 119 156 22.8 53.1 62.5 8.50 70.8 93.7 12.7 106 125 17.0 142 187 25.5 212 312 42.5 29.7 31.2 4.75 39.6 46.9 7.12 59.4 62.5 9.50 79.2 93.7 14.2 119 156 23.8 26.6 31.2 7.19 35.4 46.9 10.8 53.1 62.5 14.4 70.8 93.7 21.6 106 156 35.9 26.6 31.2 7.37 35.4 46.8 11.0 53.1 62.5 14.7 70.8 93.7 22.1 106 156 36.8 50.0 62.5 14.7 66.7 93.7 22.0 100 125 29.3 133 187 44.0 200 312 73.3 26.6 31.2 7.79 35.4 46.9 11.7 53.1 62.5 15.6 70.8 93.7 23.4 106 156 39.0 26.6 31.2 8.15 35.4 46.9 12.2 53.1 62.5 16.3 70.8 93.7 24.4 106 156 40.7 50.0 62.5 16.0 66.7 93.7 24.0 100 125 32.0 133 187 48.0 200 313 80.0 26.6 31.2 8.50 35.4 46.9 12.7 53.1 62.5 17.0 70.8 93.7 25.5 106 156 42.5 198 354 354 354 198 354 198 354 198 177 177 333 177 177 333 177 2 1 1 1 2 1 2 1 2 4 4 3 4 4 3 4 KVA KVA LV Amps HV Amps KVA LV Amps HV Amps KVA Q005ESCF 10.9 2.73 12.4 15.6 3.90 17.7 6.25 1.63 7.08 7.81 2.04 5.39 LV Amps HV Amps Q003ESCF 21.9 5.13 23.3 31.2 7.33 33.3 6.25 1.56 7.08 7.81 1.95 53.1 62.5 7.18 70.8 93.7 10.8 106 125 14.4 142 187 21.5 212 312 35.9 KVA Q002ESCF 10.9 2.51 12.4 15.6 3.59 17.7 12.5 2.93 13.3 15.6 3.67 29.7 31.2 3.76 39.6 46.9 5.64 59.4 62.5 7.50 79.1 93.7 11.3 119 156 18.8 LV Amps HV Amps Q1C5ESCF 10.9 1.66 13.9 15.6 2.37 19.8 6.25 1.44 7.08 7.81 1.80 KVA 2.82 LV Amps HV Amps Q1C0ESCB 6.25 .950 7.92 7.81 1.19 LV Amps CONNECTION DIAGRAM © Hammond Power Solutions Inc. 85 Data subject to change without notice. SECTION 2 Catalog SECTION 2 HPS Universal™ How to use the Selection Chart 1. From the top row of the “Selection Chart” locate the high and low voltage combination that is closest to the one you require. 2. Move down that column to the kVA or Ampere rating equal to or greater than the rating required by the load. 3. From the far left column, obtain the transformer catalog number. 4. For dimensional information refer to the specifications table (Group C) on page 91. 5. The corresponding connection diagram is indicated at the bottom of the Voltage / kVA column. See page 93 for the connection diagrams. SECTION 2 Single Phase - Group C Selection Chart Catalog Low Voltage 200 208 220 230 240 380 416 430 435 436 440 440 450 456 460 480 Number High Voltage 220 229 242 276 264 418 458 473 457 480 462 484 473 479 483 504 2.08 2.08 2.08 1.04 2.08 1.04 1.04 1.04 2.08 1.04 2.08 1.04 2.08 2.08 2.08 2.08 KVA 0.46 LV Amps 2.29 HV Amps 4.17 QC10DTCB KVA 0.92 LV Amps 4.58 0.48 2.29 4.17 0.95 4.58 0.50 2.29 4.17 1.01 4.58 0.29 1.25 2.08 0.58 2.50 0.55 2.29 4.17 1.10 4.58 0.44 1.15 2.08 0.87 2.29 0.48 1.15 2.08 0.95 2.29 0.49 1.15 2.08 0.99 2.29 0.95 2.19 4.17 1.90 4.38 0.50 1.15 2.08 1.00 2.29 0.96 2.19 4.17 1.93 4.38 0.50 0.98 1.15 2.19 2.08 4.17 1.01 1.97 2.29 4.38 1.00 2.19 4.17 2.00 4.38 1.01 2.19 4.17 2.01 4.38 HV Amps QC05DTCB HV Amps QC15DTCB 1.05 2.19 4.17 2.10 4.38 6.25 6.25 6.25 3.13 6.25 3.13 3.13 3.13 6.25 3.13 6.25 3.13 6.25 6.25 6.25 6.25 KVA 1.38 1.43 1.51 0.86 1.65 1.31 1.43 1.48 2.85 1.50 2.89 1.51 2.95 2.99 3.02 3.15 6.56 6.56 6.56 6.56 4.17 8.33 2.02 3.94 4.58 8.75 5.21 10.4 2.52 4.92 8.33 3.99 8.75 10.4 4.99 8.33 4.03 8.75 10.4 5.03 LV Amps 6.88 6.88 6.88 3.75 6.88 3.44 3.44 3.44 6.56 3.44 6.56 3.44 HV Amps 8.33 QC20DTCB KVA 1.83 LV Amps 9.17 HV Amps 10.4 KVA 2.29 QC25DTCB LV Amps 11.5 8.33 1.91 9.17 10.4 2.38 8.33 2.02 9.17 10.4 2.52 4.17 1.15 5.00 5.21 1.44 8.33 2.20 9.17 10.4 2.75 4.17 1.74 4.58 5.21 2.18 4.17 1.91 4.58 5.21 2.38 4.17 1.97 4.58 5.21 2.46 8.33 3.81 8.75 10.4 4.76 4.17 2.00 4.58 5.21 2.50 8.33 3.85 8.75 10.4 4.81 11.5 11.5 6.3 11.5 5.73 5.73 5.73 10.9 5.73 10.9 5.73 10.9 10.9 10.9 10.9 HV Amps 14.6 3.34 16.0 20.8 4.77 22.9 14.6 3.53 16.0 20.8 5.04 22.9 7.3 2.01 8.8 10.4 2.88 12.5 14.6 7.3 3.85 3.05 16.0 8.0 20.8 10.4 5.5 4.35 22.9 11.5 7.3 3.34 8.0 10.4 4.77 11.5 7.3 3.45 8.0 10.4 4.93 11.5 14.6 6.61 15.3 20.8 9.52 21.9 7.3 3.50 8.0 10.4 5.00 11.5 14.6 7.3 6.74 3.53 15.3 8.0 20.8 10.4 9.63 5.04 21.9 11.5 14.6 6.89 15.3 20.8 9.84 21.9 14.6 6.98 15.3 20.8 9.98 21.9 14.6 7.0 15.3 20.8 10.1 21.9 14.6 QC35DTCB KVA 3.21 LV Amps 16.0 HV Amps 20.8 QC50DTCB KVA 4.58 LV Amps 22.9 HV Amps QC75DTCB 31.3 31.3 31.3 15.6 31.3 15.6 15.6 15.6 31.3 15.6 31.3 15.6 31.3 31.3 31.3 31.3 7.15 7.56 4.31 8.25 6.53 7.15 7.39 14.3 7.49 14.4 7.56 14.8 15.0 15.1 15.8 34.4 41.7 9.17 45.8 62.5 13.8 68.8 83.3 18.3 91.7 125 27.5 138 208 45.8 34.4 41.7 9.53 45.8 62.5 14.3 68.8 83.3 19.1 91.7 125 28.6 138 208 47.7 34.4 41.7 10.1 45.8 62.5 15.1 68.8 83.3 20.2 91.7 125 30.3 138 208 50.4 18.8 20.8 5.75 25.0 31.3 8.6 37.5 41.7 11.5 50.0 62.5 17.3 75 104 28.8 34.4 41.7 11 45.8 62.5 16.5 68.8 83.3 22.0 91.7 125 33 138 208 55.0 17.2 20.8 8.71 22.9 31.3 13.1 34.4 41.7 17.4 45.8 62.5 26.1 68.8 104 43.5 17.2 20.8 9.53 22.9 31.3 14.3 34.4 41.7 19.1 45.8 62.5 28.6 68.8 104 47.7 17.2 20.8 9.85 22.9 31.3 14.8 34.4 41.7 19.7 45.8 62.5 29.6 68.8 104 49.3 32.8 41.7 19.0 43.8 62.5 28.5 65.6 83.3 38.1 87.5 125 57.1 131 208 95.2 17.2 20.8 9.99 22.9 31.3 15.0 34.4 41.7 20.0 45.8 62.5 30.0 68.8 104 50.0 32.8 41.7 19.3 43.8 62.5 28.9 65.6 83.3 38.5 87.5 125 57.8 131 208 96.3 17.2 20.8 10.1 22.9 31.3 15.1 34.4 41.7 20.2 45.8 62.5 30.3 68.8 104 50.4 32.8 41.7 19.7 43.8 62.5 29.5 65.6 83.3 39.4 87.5 125 59.1 131 208 98.4 32.8 41.7 20.0 43.8 62.5 29.9 65.6 83.3 39.9 87.5 125 59.9 131 208 99.8 32.8 41.7 20.1 43.8 62.5 30.2 65.6 83.3 40.3 87.5 125 60.4 131 208 101 32.8 41.7 21.0 43.8 62.5 31.5 65.6 83.3 42.0 87.5 125 63.0 131 208 105 229 229 229 125 229 115 115 115 219 115 219 115 219 219 219 219 1 1 1 2 1 4 4 4 3 4 3 4 3 3 3 3 KVA LV Amps HV Amps Q1C5DTCF KVA LV Amps HV Amps Q002DTCF KVA LV Amps HV Amps Q003DTCF KVA LV Amps HV Amps KVA Q005DTCF 14.6 7.4 15.3 20.8 10.5 21.9 KVA 6.88 LV Amps HV Amps Q1C0DTCB 8.33 4.20 8.75 10.4 5.25 LV Amps CONNECTION DIAGRAM © Hammond Power Solutions Inc. 86 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS How to use the Selection Chart 1. From the top row of the “Selection Chart” locate the high and low voltage combination that is closest to the one you require. 2. Determine the quantity you required. 3. The corresponding connection diagram is indicated at the top of the Voltage / kVA column. See page 94 for the connection diagrams. 4. Move down that column to the kVA or Ampere rating equal to or greater than the rating required by the load. 5. From the far left column, obtain the transformer catalog number. 6. For dimensional information refer to the specifications table (Group A) on page 91. Three Phase - Group A Selection Chart 189 198 208 208 220 227 228 232 240 High Voltage 208 208 218 229 242 250 239 255 264 QUANTITY REQUIRED 2 2 2 2 2 2 2 2 CONNECTION DIAGRAM 7 8 8 7 7 7 8 7 2.08 4.17 4.17 2.08 2.08 2.08 4.17 KVA 0.76 2.29 4.17 KVA 1.51 4.58 1.51 4.38 8.33 3.01 8.75 1.58 4.38 8.33 3.16 8.75 0.83 2.29 4.17 1.66 4.58 0.88 2.29 4.17 1.75 4.58 1.73 4.38 8.33 3.46 8.75 Number (Refer to Page 94) Three Phase Connection Style HV Amps QC05ERCB LV Amps HV Amps QC10ERCB LV Amps HV Amps 199 115 239 138 208 120 229 132 379 219 417 241 416 240 436 252 416 240 457 264 2 3 3 3 3 3 3 7 10 9 10 12 11 12 2.08 2.08 4.17 2.08 4.17 2.08 4.17 2.08 0.93 2.29 4.17 1.85 4.58 1.50 4.58 8.33 3.00 9.17 0.86 2.50 4.17 1.73 5.00 1.65 4.58 8.33 3.30 9.17 1.51 2.29 4.17 3.01 4.58 3.15 4.38 8.33 6.30 8.75 1.65 2.29 4.17 3.30 4.58 Delta Connected 6.25 KVA 2.26 QC15ERCB 189 109 208 120 0.91 2.29 4.17 1.81 4.58 Wye Connected 0.96 2.29 4.17 1.91 4.58 12.50 12.50 6.25 6.25 6.25 12.50 6.25 6.25 12.5 6.25 12.5 6.25 12.50 6.25 4.51 2.62 2.71 2.77 2.86 4.50 2.59 4.95 4.52 9.45 4.95 13.8 7.50 13.8 6.88 13.1 6.88 4.73 2.48 5.19 LV Amps 6.88 13.10 13.10 6.88 6.88 6.88 13.10 6.88 6.88 HV Amps 8.33 3.01 9.17 10.4 3.76 11.5 14.6 5.26 16.0 20.8 7.51 22.9 31.3 11.3 34.4 41.7 15.0 45.8 62.5 22.5 68.8 83.3 30.0 91.7 125 45.0 138 208 75.0 16.70 6.01 17.50 20.8 7.51 21.9 29.2 10.50 30.6 41.7 15.00 43.8 62.5 22.5 65.6 83.3 30.0 87.5 125.0 45.0 131.0 167.0 60.0 175.0 250 90.0 263 417 150.0 16.70 6.31 17.50 20.8 7.89 21.9 29.2 11.00 30.6 41.7 15.80 43.8 62.5 23.7 65.6 83.3 31.5 87.5 125.0 47.3 131.0 167.0 63.1 175.0 250 94.6 263 417 157.6 8.33 3.31 9.17 10.4 4.13 11.5 14.6 5.78 16.0 20.8 8.26 22.9 31.3 12.4 34.4 41.7 16.5 45.8 62.5 24.8 68.8 83.3 33.0 91.7 125 49.5 138 208 82.6 8.33 3.50 9.17 10.4 4.37 11.5 14.6 6.12 16.0 20.8 8.74 22.9 31.3 13.1 34.4 41.7 17.5 45.8 62.5 26.2 68.8 83.3 34.9 91.7 125 52.4 138 208 87.3 8.33 3.61 9.17 10.4 4.51 11.5 14.6 6.31 16.0 20.8 9.02 22.9 31.3 13.5 34.4 41.7 18.0 45.8 62.5 27.0 68.8 83.3 36.1 91.7 125 54.1 138 208 90.1 16.70 6.92 17.50 20.8 8.64 21.9 29.2 12.10 30.6 41.7 17.30 43.8 62.5 25.9 65.6 83.3 34.6 87.5 125.0 51.8 131.0 167.0 69.1 175.0 250 103.7 263 417 172.8 8.33 3.69 9.17 10.4 4.61 11.5 14.6 6.45 16.0 20.8 9.21 22.9 31.3 13.8 34.4 41.7 18.4 45.8 62.5 27.6 68.8 83.3 36.8 91.7 125 55.3 138 208 92.1 8.33 16.7 8.33 16.7 8.33 3.82 6.00 3.45 6.60 6.03 9.17 18.3 10.0 18.3 9.17 10.4 20.8 10.4 20.8 10.4 4.77 7.50 4.31 8.25 7.53 11.5 22.9 12.5 22.9 11.5 14.6 29.2 14.6 29.2 14.6 6.67 10.50 6.04 11.55 10.54 16.0 32.1 17.5 32.1 16.0 20.8 41.7 20.8 41.7 20.8 9.53 15.0 8.60 16.5 15.1 22.9 45.8 25.0 45.8 22.9 31.3 62.5 31.3 62.5 31.3 14.3 22.5 12.9 24.8 22.6 34.4 68.8 37.5 68.8 34.4 41.7 83.3 41.7 83.3 41.7 19.1 30.0 17.3 33.0 30.1 45.8 91.7 50.0 91.7 45.8 62.5 125 62.5 125 62.5 28.6 45.0 25.9 49.5 45.2 68.8 138 75.0 138 68.8 83.3 167 83.3 167 83.3 38.1 60.0 34.5 66.0 60.3 91.7 183 100 183 91.7 125 250 125 250 125 57.2 90.0 51.8 99.0 90.4 138 275 150 275 138 208 417 208 417 208 95.3 150 86.3 165 151 229 438 438 229 229 229 438 229 229 QC20ERCB KVA LV Amps HV Amps QC25ERCB KVA LV Amps HV Amps QC35ERCB KVA LV Amps HV Amps QC50ERCB KVA LV Amps HV Amps QC75ERCB KVA LV Amps HV Amps Q1C0ERCB KVA LV Amps HV Amps Q1C5ERCF KVA LV Amps HV Amps Q002ERCF KVA LV Amps HV Amps Q003ERCF KVA LV Amps HV Amps KVA Q005ERCF LV Amps © Hammond Power Solutions Inc. 87 458 250 458 229 16.70 8.33 12.6 6.60 17.5 9.17 20.8 10.4 15.75 8.25 21.9 11.5 29.2 14.6 22.05 11.60 30.6 16.0 41.7 20.8 31.5 16.5 43.8 22.9 62.5 31.3 47.3 24.8 65.6 34.4 83.3 41.7 63.0 33.0 87.5 45.8 125.0 62.5 94.5 49.5 131 68.8 167.0 83.3 126 66.0 175 91.7 250 125 189 99.0 263 138 417 208 315 165 438 229 Data subject to change without notice. SECTION 2 Low Voltage Catalog SECTION 2 HPS Universal™ How to use the Selection Chart 1. From the top row of the “Selection Chart” locate the high and low voltage combination that is closest to the one you require. 2. Determine the quantity you required. 3. The corresponding connection diagram is indicated at the top of the Voltage / kVA column. See page 94 for the connection diagrams. 4. Move down that column to the kVA or Ampere rating equal to or greater than the rating required by the load. 5. From the far left column, obtain the transformer catalog number. 6. For dimensional information refer to the specifications table (Group B) on page 92. Three Phase - Group B Selection Chart SECTION 2 Catalog Number Low Voltage 184 195 208 208 225 230 234 234 240 240 High Voltage 209 208 222 236 240 245 250 265 272 256 2 2 2 2 2 2 2 2 2 7 8 8 7 8 8 8 7 1.56 3.13 3.13 1.56 3.13 3.13 3.13 0.57 1.77 3.13 1.13 3.54 1.13 3.33 6.25 2.26 6.67 1.21 3.33 6.25 2.41 6.67 0.64 1.77 3.13 1.28 3.54 1.30 3.33 6.25 2.60 6.67 1.33 3.33 6.25 2.66 6.67 1.36 3.33 6.25 2.71 6.67 QUANTITY REQUIRED CONNECTION DIAGRAM (Refer to Page 94) Three Phase Connection Style HV Amps QC05ESCB KVA LV Amps HV Amps QC10ESCB KVA LV Amps HV Amps QC15ESCB KVA LV Amps HV Amps QC20ESCB KVA LV Amps HV Amps QC25ESCB KVA LV Amps HV Amps QC35ESCB KVA LV Amps HV Amps QC50ESCB KVA LV Amps HV Amps QC75ESCB KVA LV Amps HV Amps Q1C0ESCB KVA LV Amps HV Amps Q1C5ESCF KVA LV Amps HV Amps Q002ESCF KVA LV Amps HV Amps Q003ESCF KVA LV Amps HV Amps Q005ESCF KVA LV Amps 2 184 106 208 120 3 416 240 236 136 3 379 219 431 249 3 416 240 443 256 3 416 240 471 272 3 7 8 10 10 12 11 12 1.56 1.56 3.13 3.13 3.13 1.56 3.13 1.56 0.72 1.77 3.13 1.44 3.54 0.74 1.77 3.13 1.48 3.54 1.39 3.33 6.25 2.78 6.67 1.13 3.54 6.25 2.25 7.08 2.40 3.33 6.25 4.80 6.67 1.28 1.77 3.13 2.55 3.54 Delta Connected Wye Connected 1.28 3.54 6.25 2.55 7.08 1.17 1.77 3.13 2.33 3.54 4.69 9.38 9.38 4.69 9.38 9.38 9.38 4.69 4.69 9.38 9.38 9.38 4.69 9.4 4.69 1.70 3.38 3.61 1.92 3.90 3.99 4.06 2.16 2.21 4.16 3.38 3.83 3.50 7.20 3.83 5.31 6.25 2.26 7.08 7.81 2.83 8.85 10.9 3.96 12.4 15.6 5.65 17.7 10.00 12.50 4.51 13.30 15.60 5.63 16.70 21.9 7.89 23.3 31.3 11.30 33.3 10.00 12.50 4.81 13.30 15.60 6.01 16.70 21.9 8.41 23.3 31.3 12.00 33.3 5.31 6.25 2.56 7.08 7.80 3.19 8.90 10.9 4.47 12.4 15.6 6.38 17.7 10.00 12.50 5.20 13.30 15.60 6.50 16.70 21.9 9.10 23.3 31.3 13.00 33.3 10.00 12.50 5.32 13.30 15.60 6.64 16.70 21.9 9.30 23.3 31.3 13.30 33.3 10.00 12.50 5.41 13.30 15.60 6.76 16.70 21.9 9.46 23.3 31.3 13.50 33.3 5.31 6.25 2.88 7.08 7.81 3.59 8.85 10.9 5.03 12.4 15.6 7.18 17.7 5.31 6.25 2.94 7.08 7.81 3.69 8.85 10.9 5.16 12.4 15.6 7.37 17.7 10.00 12.50 5.55 13.30 15.60 6.93 16.70 21.9 9.70 23.3 31.3 13.90 33.3 10.6 12.5 4.50 14.2 15.6 5.63 17.7 21.9 7.88 24.8 31.3 11.3 35.4 23.4 23.4 46.9 46.9 46.9 23.4 23.4 46.9 46.9 23.4 46.9 46.9 46.9 8.47 26.6 31.3 11.3 35.4 46.9 16.9 53.1 62.5 22.6 70.8 93.75 33.9 106.3 156.25 56.4 177.1 16.90 50.0 62.5 22.5 66.7 93.8 33.8 100.0 125.0 45.0 133.3 187.5 67.6 200 312.5 112.6 333.3 18.00 50.0 62.5 24.0 66.7 93.8 36.0 100.0 125.0 48.0 133.3 187.5 72.1 200 312.5 120.1 333.3 9.57 26.6 31.3 12.8 35.4 46.9 19.1 53.1 62.5 25.5 70.8 93.75 38.3 106.3 156.25 63.8 177.1 19.5 50.0 62.5 26.0 66.7 93.8 39.0 100.0 125.0 52.0 133.3 187.5 78.0 200 313 129.9 333.3 19.9 50.0 62.5 26.6 66.7 93.8 39.8 100.0 125.0 53.1 133.3 187.5 79.7 200 312.5 132.8 333.3 20.3 50.0 62.5 27.0 66.7 93.8 40.5 100.0 125.0 54.0 133.3 187.5 81.1 200 312.5 135.1 333.3 © Hammond Power Solutions Inc. 88 10.8 11.1 20.8 16.9 26.6 26.6 50.0 53.1 31.3 31.3 62.5 62.5 14.4 14.7 27.7 22.5 35.4 35.4 66.7 70.8 46.9 46.9 93.8 93.8 21.5 22.1 41.6 33.8 53.1 53.1 100.0 106 62.5 62.5 125.0 125 28.7 29.4 55.4 45.0 70.8 70.8 133.3 142 93.75 93.75 187.5 188 43.1 44.2 83.1 67.5 106.3 106.3 200 213 156.25 156.25 312.5 313 71.8 73.6 138.6 113 177.1 177.1 333.3 354 10.6 12.5 5.10 14.2 15.6 6.38 17.7 21.9 8.93 24.8 31.3 12.8 35.4 19.1 53.1 62.5 25.5 70.8 93.8 38.3 106 125 51.0 142 188 76.5 213 313 128 354 5.31 10.0 5.31 6.25 12.50 6.25 4.67 9.60 5.10 7.08 13.3 7.08 7.81 15.6 7.81 5.84 12.0 6.38 8.85 16.7 8.85 10.9 21.9 10.9 8.17 16.8 8.93 12.4 23.3 12.4 15.6 31.3 15.6 11.7 24.0 12.8 17.7 33.3 17.7 46.9 23.4 17.5 36.0 19.1 26.6 50.0 26.6 31.3 62.5 31.3 23.3 48.0 25.5 35.4 66.7 35.4 46.9 93.8 46.9 35.0 72.0 38.3 53.1 100 53.1 62.5 125.0 62.5 46.7 96.0 51.0 70.8 133 70.8 93.8 188 93.8 70.0 144 76.5 106 200 106 156 313 156 117 240 128 177 333 177 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS How to use the Selection Chart 1. From the top row of the “Selection Chart” locate the high and low voltage combination that is closest to the one you require. 2. Determine the quantity you required. 3. The corresponding connection diagram is indicated at the top of the Voltage / kVA column. See page 94 for the connection diagrams. 4. Move down that column to the kVA or Ampere rating equal to or greater than the rating required by the load. 5. From the far left column, obtain the transformer catalog number. 6. For dimensional information refer to the specifications table (Group C) on page 92. Three Phase - Group C Selection Chart 173 200 208 362 380 400 419 436 457 480 480 High Voltage 208 240 250 380 418 440 440 480 480 528 504 QUANTITY REQUIRED 2 2 2 2 2 2 2 2 2 2 CONNECTION DIAGRAM 5 5 5 6 7 7 8 7 8 7 Number (Refer to Page 94) Three Phase Connection Style HV Amps QC05DTCB LV Amps HV Amps QC10DTCB LV Amps HV Amps QC15DTCB LV Amps HV Amps QC20DTCB LV Amps HV Amps QC25DTCB LV Amps HV Amps QC35DTCB LV Amps HV Amps QC50DTCB LV Amps HV Amps QC75DTCB LV Amps HV Amps Q1C0DTCB LV Amps HV Amps Q1C5DTCF LV Amps HV Amps Q002DTCF LV Amps HV Amps Q003DTCF LV Amps HV Amps Q005DTCF LV Amps 346 200 416 240 379 219 456 263 400 231 480 277 416 240 499 288 2 3 3 3 3 8 9 9 9 9 Delta Connected Wye Connected 1.04 1.04 1.04 2.08 1.04 1.04 2.08 1.04 2.08 1.04 2.08 1.04 1.04 1.04 1.04 KVA 0.38 1.25 2.08 KVA 0.75 2.50 3.13 KVA 1.13 3.75 4.17 KVA 1.50 5.00 5.21 KVA 1.88 6.25 7.29 KVA 2.63 8.75 10.4 KVA 3.75 12.5 15.6 KVA 5.62 18.8 20.8 KVA 7.50 25.0 31.3 KVA 11.2 37.5 41.7 KVA 15.0 50.0 62.5 KVA 22.5 75.0 104 KVA 37.5 125 0.44 1.25 2.08 0.87 2.50 3.13 1.30 3.75 4.17 1.74 5.00 5.21 2.17 6.25 7.29 3.04 8.75 10.4 4.34 12.5 15.6 6.50 18.8 20.8 8.67 25.0 31.3 13.0 37.5 41.7 17.3 50.0 62.5 26.0 75.0 104 43.3 125 0.46 1.25 2.08 0.91 2.50 3.13 1.36 3.75 4.17 1.81 5.00 5.21 2.26 6.25 7.29 3.16 8.75 10.4 4.51 12.5 15.6 6.76 18.8 20.8 9.01 25.0 31.3 13.5 37.5 41.7 18.0 50.0 62.5 27.0 75.0 104 45.0 125 1.44 2.29 4.17 2.88 4.58 6.25 4.32 6.88 8.33 5.75 9.17 10.4 7.19 11.50 14.6 10.1 16.0 20.8 14.4 22.9 31.3 21.6 34.4 41.7 28.7 45.8 62.5 43.1 68.8 83.3 57.5 91.7 125 86.2 138 208 144.0 229 0.76 1.15 2.08 1.51 2.29 3.13 2.27 3.44 4.17 3.02 4.58 5.21 3.78 5.73 7.29 5.28 8.0 10.4 7.55 11.5 15.6 11.3 17.2 20.8 15.1 22.9 31.3 22.6 34.4 41.7 30.2 45.8 62.5 45.3 68.8 104 75.4 115 1.67 2.29 4.17 3.33 4.58 6.25 4.99 6.88 8.33 6.66 9.17 10.40 8.32 11.50 14.6 11.70 16.0 20.8 16.60 22.9 31.3 25.0 34.4 41.7 33.3 45.8 62.5 49.9 68.8 83.3 66.5 91.7 125.0 99.8 138.0 208 166.0 229 0.87 1.15 2.08 1.74 2.29 3.13 2.60 3.44 4.17 3.47 4.58 5.21 4.33 5.73 7.3 6.06 8.0 10.4 8.66 11.5 15.6 13.0 17.2 20.8 17.3 22.9 31.3 26.0 34.4 41.7 34.6 45.8 62.5 51.9 68.8 104 86.5 115 1.82 2.29 4.17 3.63 4.58 6.25 5.45 6.88 8.33 7.26 9.17 10.40 9.07 11.50 14.6 12.70 16.0 20.8 18.10 22.9 31.3 27.2 34.4 41.7 36.3 45.8 62.5 54.4 68.8 83.8 72.6 91.7 125.0 109.0 138.0 208 181.0 229 0.96 1.15 2.08 1.91 2.29 3.13 2.86 3.44 4.17 3.82 4.58 5.21 4.77 5.73 7.29 6.67 8.02 10.4 9.53 11.5 15.6 14.3 17.2 20.8 19.1 22.9 31.3 28.6 34.4 41.7 38.1 45.8 62.5 57.2 68.8 104 95.3 115 1.82 2.19 4.17 3.64 4.38 6.25 5.46 6.56 8.33 7.28 8.75 10.40 9.10 10.90 14.6 12.70 15.3 20.8 18.20 21.9 31.3 27.3 32.8 41.7 36.4 43.8 62.5 54.6 65.6 83.3 72.8 87.5 125.0 109.0 131.0 208 182.0 219 0.75 1.25 2.08 1.50 2.50 3.13 2.25 3.75 4.17 3.00 5.00 5.21 3.75 6.25 7.29 5.25 8.75 10.4 7.50 12.5 15.6 11.3 18.8 20.8 15.0 25.0 31.3 22.5 37.5 41.7 30.0 50.0 62.5 45.0 75.0 104 75.0 125 0.82 1.25 2.08 1.64 2.50 3.13 2.47 3.75 4.17 3.29 5.00 5.21 4.11 6.25 7.29 5.75 8.75 10.4 8.22 12.5 15.6 12.3 18.8 20.8 16.4 25.0 31.3 24.7 37.5 41.7 32.9 50.0 62.5 49.3 75.0 104 82.2 125 0.87 1.25 2.08 1.73 2.50 3.13 2.60 3.75 4.17 3.46 5.00 5.21 4.33 6.25 7.29 6.06 8.75 10.4 8.66 12.5 15.6 13.0 18.8 20.8 17.3 25.0 31.3 26.0 37.5 41.7 34.6 50.0 62.5 51.9 75.0 104 86.6 125 0.90 1.15 2.08 1.80 2.50 3.13 2.70 3.75 4.17 3.60 5.00 5.21 4.50 6.25 7.29 6.30 8.75 10.4 9.00 12.5 15.6 13.5 18.8 20.8 18.0 25.0 31.3 27.0 37.5 41.7 36.0 50.0 62.5 54.0 75.0 104 90.0 125 © Hammond Power Solutions Inc. 0.80 1.15 2.08 1.59 2.29 3.13 2.39 3.44 4.17 3.18 4.58 5.21 3.97 5.73 7.3 5.56 8.0 10.4 7.94 11.5 15.6 11.9 17.2 20.8 15.9 22.9 31.3 23.8 34.4 41.7 31.8 45.8 62.5 47.6 68.8 104 79.4 115 89 Data subject to change without notice. SECTION 2 Low Voltage Catalog SECTION 2 HPS Universal™ Single Phase Specification Tables Group A Primary Voltage 120 X 240 Secondary 12 X 24 Voltage SECTION 2 50/60 Hertz VA Catalog Number 50 100 150 200 250 350 500 750 1000 1500 2000 3000 5000 QC05ERCB QC10ERCB QC15ERCB QC20ERCB QC25ERCB QC35ERCB QC50ERCB QC75ERCB Q1C0ERCB Q1C5ERCF Q002ERCF Q003ERCF Q005ERCF Case Style Approx. Dimensions (Inches) (Pages 262) Width Depth Height Approx. Weight (Lbs.) NQ0 NQ0 NQ0 NQ1 NQ1 NQ1 NQ2 NQ2 NQ3 NQ4 NQ4 NQ5 NQ5 3.75 3.75 3.75 4.50 4.50 4.50 5.00 5.00 5.88 7.00 7.00 10.00 10.00 5.25 5.25 5.25 5.75 5.75 5.75 4.75 4.75 5.50 6.50 6.50 7.75 7.75 7.25 7.25 7.25 7.25 7.25 7.25 9.25 9.25 10.50 11.75 11.75 17.25 17.25 6 7 8 11 13 14 15 18 25 36 46 65 105 W W W W W W W W W W W W W Mtg Type W - Wall W W W W W W W W W W W W W Mtg Type W - Wall Group B Primary Voltage 120 X 240 Secondary 16 X 32 Voltage 50/60 Hertz VA Catalog Number 50 100 150 200 250 350 500 750 1000 1500 2000 3000 5000 QC05ESCB QC10ESCB QC15ESCB QC20ESCB QC25ESCB QC35ESCB QC50ESCB QC75ESCB Q1C0ESCB Q1C5ESCF Q002ESCF Q003ESCF Q005ESCF Case Style Approx. Dimensions (Inches) (Pages 262) Width Depth Height Approx. Weight (Lbs.) NQ0 NQ0 NQ0 NQ1 NQ1 NQ1 NQ2 NQ2 NQ3 NQ4 NQ4 NQ5 NQ5 3.75 3.75 3.75 4.50 4.50 4.50 5.00 5.00 5.88 7.00 7.00 10.00 10.00 5.25 5.25 5.25 5.75 5.75 5.75 4.75 4.75 5.50 6.50 6.50 7.75 7.75 7.25 7.25 7.25 7.25 7.25 7.25 9.25 9.25 10.50 11.75 11.75 17.25 17.25 6 7 8 11 13 14 15 18 25 36 46 65 105 © Hammond Power Solutions Inc. 90 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS Single Phase Specification Tables Group C Primary Voltage 240 X 480 Secondary 24 X 48 Voltage 50/60 Hertz Catalog Number 50 100 150 200 250 350 500 750 1000 1500 2000 3000 5000 QC05DTCB QC10DTCB QC15DTCB QC20DTCB QC25DTCB QC35DTCB QC50DTCB QC75DTCB Q1C0DTCB Q1C5DTCF Q002DTCF Q003DTCF Q005DTCF Case Style Approx. Dimensions (Inches) (Pages 262) Width Depth Height Approx. Weight (Lbs.) NQ0 NQ0 NQ0 NQ1 NQ1 NQ1 NQ2 NQ2 NQ3 NQ4 NQ4 NQ5 NQ5 3.75 3.75 3.75 4.50 4.50 4.50 5.00 5.00 5.88 7.00 7.00 10.00 10.00 5.25 5.25 5.25 5.75 5.75 5.75 4.75 4.75 5.50 6.50 6.50 7.75 7.75 7.25 7.25 7.25 7.25 7.25 7.25 9.25 9.25 10.50 11.75 11.75 17.25 17.25 6 7 8 11 13 14 15 18 25 36 46 65 105 W W W W W W W W W W W W W Mtg Type W - Wall W W W W W W W W W W W W W Mtg Type W - Wall Three Phase Specification Tables Group A Primary Voltage 120 X 240 Secondary 12 X 24 Voltage 50/60 Hertz VA Catalog Number 50 100 150 200 250 350 500 750 1000 1500 2000 3000 5000 QC05ERCB QC10ERCB QC15ERCB QC20ERCB QC25ERCB QC35ERCB QC50ERCB QC75ERCB Q1C0ERCB Q1C5ERCF Q002ERCF Q003ERCF Q005ERCF Case Style Approx. Dimensions (Inches) (Pages 262) Width Depth Height Approx. Weight (Lbs.) NQ0 NQ0 NQ0 NQ1 NQ1 NQ1 NQ2 NQ2 NQ3 NQ4 NQ4 NQ5 NQ5 3.75 3.75 3.75 4.50 4.50 4.50 5.00 5.00 5.88 7.00 7.00 10.00 10.00 5.25 5.25 5.25 5.75 5.75 5.75 4.75 4.75 5.50 6.50 6.50 7.75 7.75 7.25 7.25 7.25 7.25 7.25 7.25 9.25 9.25 10.50 11.75 11.75 17.25 17.25 6 7 8 11 13 14 15 18 25 36 46 65 105 © Hammond Power Solutions Inc. 91 Data subject to change without notice. SECTION 2 VA SECTION 2 HPS Universal™ Three Phase Specification Tables Group B Primary Voltage 120 X 240 SECTION 2 Secondary 16 X 32 Voltage 50/60 Hertz VA Catalog Number 50 100 150 200 250 350 500 750 1000 1500 2000 3000 5000 QC05ESCB QC10ESCB QC15ESCB QC20ESCB QC25ESCB QC35ESCB QC50ESCB QC75ESCB Q1C0ESCB Q1C5ESCF Q002ESCF Q003ESCF Q005ESCF Case Style Approx. Dimensions (Inches) (Pages 262) Width Depth Height Approx. Weight (Lbs.) NQ0 NQ0 NQ0 NQ1 NQ1 NQ1 NQ2 NQ2 NQ3 NQ4 NQ4 NQ5 NQ5 3.75 3.75 3.75 4.50 4.50 4.50 5.00 5.00 5.88 7.00 7.00 10.00 10.00 5.25 5.25 5.25 5.75 5.75 5.75 4.75 4.75 5.50 6.50 6.50 7.75 7.75 7.25 7.25 7.25 7.25 7.25 7.25 9.25 9.25 10.50 11.75 11.75 17.25 17.25 6 7 8 11 13 14 15 18 25 36 46 65 105 W W W W W W W W W W W W W Mtg Type W - Wall W W W W W W W W W W W W W Mtg Type W - Wall Group C Primary Voltage 240 X 480 Secondary 24 X 48 Voltage 50/60 Hertz VA Catalog Number 50 100 150 200 250 350 500 750 1000 1500 2000 3000 5000 QC05DTCB QC10DTCB QC15DTCB QC20DTCB QC25DTCB QC35DTCB QC50DTCB QC75DTCB Q1C0DTCB Q1C5DTCF Q002DTCF Q003DTCF Q005DTCF Case Style Approx. Dimensions (Inches) (Pages 262) Width Depth Height Approx. Weight (Lbs.) NQ0 NQ0 NQ0 NQ1 NQ1 NQ1 NQ2 NQ2 NQ3 NQ4 NQ4 NQ5 NQ5 3.75 3.75 3.75 4.50 4.50 4.50 5.00 5.00 5.88 7.00 7.00 10.00 10.00 5.25 5.25 5.25 5.75 5.75 5.75 4.75 4.75 5.50 6.50 6.50 7.75 7.75 7.25 7.25 7.25 7.25 7.25 7.25 9.25 9.25 10.50 11.75 11.75 17.25 17.25 6 7 8 11 13 14 15 18 25 36 46 65 105 © Hammond Power Solutions Inc. 92 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS Single Phase Connection Diagrams Low Voltage Low Voltage Low Voltage © Hammond Power Solutions Inc. H2 X3 H3 X2 H1 X4 H4 X1 H2 X3 H3 X2 H1 X4 H4 X1 H2 X3 H3 X2 H1 X4 H4 X1 H2 X3 H3 X2 H1 X4 93 Connection Diagram #1 High Voltage Connection Diagram #2 High Voltage Connection Diagram #3 High Voltage Connection Diagram #4 High Voltage Data subject to change without notice. SECTION 2 Low Voltage H4 X1 SECTION 2 HPS Universal™ Three Phase Connection Diagrams Connection Diagram #5 1 Low Voltage 3 Phase 2 3 2 3 H4 H4 3 Connection Diagram #7 1 Low Voltage 3 Phase er #1 1 2 3 2 3 H4 H4 2 #1 er rm X4 X2 X3 Transformer #3 H4 H2 H3 Transformer #3 X2 sfo r #1 mer 1 High Voltage 3 Phase 2 3 94 H1 H3 H2 H4 X1 X3 X2 X4 H3 Tra n er X3 X1 H4 H2 X1 X4 X4 3 X2 X3 X1 X2 X3 2 orm nsf Tra #2 © Hammond Power Solutions Inc. Connection Diagram #12 1 X4 H4 H2 H3 H3 H2 H4 X1 X3 X2 X4 H1 3 Low Voltage 3 Phase 3 1 sfo X4 Transformer #3 Transformer #3 Connection Diagram #11 1 er orm nsf Tra #2 H3 H2 H4 X1 X3 X2 X4 2 X1 H4 H2 X1 H4 H2 H3 X3 X2 X3 1 H1 X2 X3 X1 H4 H2 H3 sfo r #1 mer 3 for #1 mer X4 X4 X2 X4 X3 X1 Tra n High Voltage 3 Phase Tra ns 3 r 2 Low Voltage 3 Phase 2 e orm nsf Tra #2 H3 H2 H4 X1 X3 X2 X4 Connection Diagram #10 1 Low Voltage 3 Phase X2 1 High Voltage 3 Phase H1 H4 H2 H3 sfo r #1 mer X1 3 H3 3 1 2 X1 H4 H2 H3 2 Tra n Tra n #1 er rm sfo Tra n Connection Diagram #9 1 #2 2 X2 X3 er High Voltage 3 Phase 3 Low Voltage 3 Phase High Voltage 3 Phase X1 X1 #2 1 X4 rm X3 H3 H1 sfo X4 X2 X3 H2 n Tra X4 X2 er X1 High Voltage 3 Phase H3 H1 H3 H1 rm X3 H2 sfo X4 X2 Connection Diagram #8 1 Low Voltage 3 Phase H2 n Tra H3 H1 X1 3 H4 H4 H2 X2 X3 2 High Voltage 3 Phase 2 High Voltage 3 Phase X4 Tra ns for m sfo rm er Tra n X1 X1 #2 SECTION 2 X4 X2 X3 X3 er 1 H2 H3 H1 2 r# me for ns Tra X4 X2 rm X1 H2 H3 H1 sfo X3 H2 H3 H1 n Tra X4 X2 #1 H4 H4 H2 H3 H1 Connection Diagram #6 1 Low Voltage 3 Phase er orm nsf Tra #2 2 3 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS Buck-Boost Transformers - Questions & Answers 1. What is a buck-boost transformer? 2. How does a buck-boost transformer differ from an isolating transformer? A buck-boost transformer is manufactured as an isolating transformer, with separable primary and secondary, and is shipped from the factory in that configuration. When the end user at site connects it, the primary is connected to the secondary changing the transformer’s electrical characteristics to those of an autotransformer. This provides the smaller voltage correction that is typical of buck-boost. The primary and secondary windings are no longer isolated as they are connected together. 3. What is the difference between a buck-boost transformer and an autotransformer? As noted above, when the primary and secondary are connected together to buck or boost voltage, the transformer becomes an autotransformer. If the connection between the primary and secondary winding is not made, then the unit remains as an isolation transformer. Applications 4. Why are they used? A buck-boost transformer is a simple and effective way of correcting off-standard voltages. Electrical and electronic equipment is designed to operate within a standard tolerance of nominal supply voltages. When the supply voltage is consistently too high or low - typically more than 10%, the equipment will operate below peak efficiency. 5. Can buck-boost transformers be used to power low voltage circuits? Installed as two-winding, isolation transformers, these units can be used to power low voltage circuits including control, lighting circuits, or other low voltage applications that require 12, 16, 24, 32 or 48 volts output, consistent with the secondary of these designs. The unit is connected as an isolating transformer and the nameplate kVA rating is the transformer’s capacity. Operation and Construction 6. Why do buck-boost transformers have 4 windings? A four winding buck-boost transformer with 2 primary and 2 secondary windings can be connected eight different ways to provide a multitude of voltages and KVA’s. This provides the flexibility necessary for the broad variety of applications. A two-winding transformer can only be connected in two different ways. © Hammond Power Solutions Inc. 95 Data subject to change without notice. SECTION 2 Buck-boost transformers are small single phase transformers designed to lower (buck) or raise (boost) line voltage from 5-20%. The most common applications for buck-boost transformers include boosting 208 volts to 230 or 240 volts for air conditioning systems, boosting 110 to 120 volts and 240 to 277 volts for lighting applications, heating systems and induction motors of all types. Many applications exist where supply voltages are frequently above or below nominal. Buck-boost transformers are conventional low voltage, single phase distribution transformers, with standard primary voltages of 120, 240 or 480 volts, and secondary voltages of 12, 16, 24, 32 or 48 volts. They are available in sizes ranging from 50 VA to 10,000 VA. The primary and secondary are wired together to form a single-winding autotransformer. Utilizing the additive and subtractive polarity, small amounts of voltage are either added or subtracted from a distribution circuit. SECTION 2 HPS Universal™ 7. Will a Buck-Boost transformer stabilize voltage? Buck-boost transformers will not stabilize supply line voltage. The output voltage of a buck-boost is a function of the input voltage. If the input voltage varies, then the output voltage will also vary by the same percentage. Load Data 8. Are there any restrictions on the type of load that can be operated from a Buck-Boost transformer? SECTION 2 There are no restrictions as to application for Buck-Boost, including single or three-phase motor loads. 9. As an Autotransformer, how can a Buck-Boost transformer supply kVA power? This is a function of adding voltage - a small amount of voltage is added and a small amount of corresponding power capacity is added as well. For example, if the transformer is connected in such a way that 22 volts is added to a 208 volt primary, a 230 volt output will result. Using this example, the calculation for autotransformer kVA is as follows: kVA = Output Volts x Secondary Amps 1000 230V x 41.67 Amps = 9.58 KVA kVA = 1000 10. How are single phase and three phase load amps and load kVA calculated? Single phase Amps = kVA x 1000 Three phase Amps = Volts kVA x 1000 Volts x 1.73 Volts x Amps Volts x Amps x 1.73 Three phase kVA = Single phase kVA = 1000 1000 Three Phase 11. Can Buck-Boost transformers be used on three phase systems? Interconnecting two or three single phase units will readily accommodate three phase systems - refer to the corresponding three phase section in this catalog. The number of units to be used in a three phase installation depends on the number of wires in the supply line. If the three phase supply is 4-wire wye, then three buck-boost transformers are required. If the three phase supply is 3-wire wye (neutral not available), two buck-boost transformers are needed. 12. Should Buck-Boost transformers be used to develop three phase 4 wire wye circuits from three phase 3 wire delta circuits? No - a three-phase “wye” buck-boost transformer connection should be used only on a 4-wire source of supply. A delta to wye connection does not provide adequate current capacity to accommodate unbalanced currents flowing in the neutral wire of the 4-wire circuit. © Hammond Power Solutions Inc. 96 Data subject to change without notice. SECTION 2 BUCK-BOOST TRANSFORMERS 13. Why isn’t a ‘closed delta’ Buck-Boost connection recommended? This connection requires more kVA power than a “wye” or open delta connection and phase shifting occurs on the output. The closed delta connection is more expensive and electrically inferior to other three phase connections. Connection and Frequency 14. How do you know how to connect a Buck-Boost transformer? A connection chart is provided with each unit that shows how to make the corresponding connections. These same charts are also shown in this section. Due to ‘saturation’ of the core, 60 Hertz buck-boost transformers should only be operated at 60 Hertz, and not 50 Hertz. Units manufactured as 50 Hertz units will however, operate at 60 Hertz. Nameplate Data 17. Why are buck-boost transformers shipped from the factory connected as isolating transformers, and not pre-connected autotransformers? The same 4-winding buck-boost transformer can be connected eight different ways to provide a multitude of voltage combinations. The correct connection can best be determined by the user when assessing the supply voltage at site. 18. Why is the isolation transformer kVA rating shown on the nameplate instead of the autotransformer kVA rating? Shipped as an isolating transformer, the nameplate is required to show the performance characteristics accordingly. Additionally, as an autotransformer, the eight different combinations of voltages and kVA’s would be impractical to list on the nameplate. A connection chart, listing the various connections, is included with each unit. Safety 19. Do Buck-Boost transformers present a safety hazard compared to conventional autotransformers? Buck-boost transformers only change voltage by a small amount, such as 208 to 240 volts. This small increase does not represent a safety hazard. Conventional autotransformers, manufactured as single winding transformers, change much higher magnitudes of voltage, e.g. 480 to 240 volts. In a system where the line is grounded, it is possible to have 480 volts to ground when the expectations are that 240 volts is at the output. For this reason, qualified personnel only should maintain conventional autotransformers. Sound Levels 20. How does the sound level differ between Buck-Boost and isolation transformers? Buck-boost transformers, connected as autotransformers, will be quieter than an equivalent isolation transformer capable of handling the same load. The isolation transformer would have to be physically larger than the buck-boost transformer, and smaller transformers are quieter than larger ones. For example, a 10 kVA is 35 dba and a 75 kVA is 50 dba. © Hammond Power Solutions Inc. 97 Data subject to change without notice. SECTION 2 15. Can 60 Hertz Buck-Boost transformers be operated on 50 Hertz? SECTION 2 HPS Universal™ Cost and Life Expectancy 21. How does the costs compare between a Buck-Boost transformer and an Isolation transformer handling the same load? For most buck-boost applications, the savings are about 75% compared to the use of an isolation transformer for the same application. 22. What is the life expectancy of a Buck-Boost transformer? SECTION 2 Buck-boost transformers have exactly the same life expectancy as other dry-type transformers. 23. Buck-Boost transformers are almost always installed as autotransformers. Does the National Electrical Code (NEC) permit the use of autotransformers? Autotransformers are very common and recognized by all the safety and standard authorities. You can refer to N.E.C. Article 450-4, “Autotransformers 600 Volts, Nominal, or Less”, as a reference publication. Item (a) details overcurrent protection for an autotransformer and item (b) covers an isolation transformer being field connected as an autotransformer for a buck-boost application. 24. When a Buck-Boost transformer is connected as an autotransformer, what is the procedure for determining the current rating of the overcurrent protective device, such as the fuse or circuit breaker? The NEC Article 450-4 outlines overcurrent protection for autotransformers. It is reproduced as follows: “NEC 450-4 - Autotransformers 600 Volts, Nominal, or Less (a) Overcurrent Protection. Each autotransformer 600 volts, nominal, or less shall be protected by an individual overcurrent device installed in series with each ungrounded input conductor. Such overcurrent device shall be rated or set at not more than 125 percent of the rated full load input current of the autotransformer. An overcurrent device shall not be installed in series with the shunt winding. Exception: Where the rated input current of an autotransformer is 9 amperes or more and 125 percent of this current does not correspond to a standard rating of a fuse or non-adjustable circuit breaker; the next higher standard rating described in our section shall be permitted. When the rated input current is less than 9 amperes, an overcurrent device rated or set at not more than 167 percent of the input current shall be permitted. (b) Transformer Field-Connected as an autotransformer. A transformer field-connected as autotransformers shall be identified for use at “elevated voltage”. Example: A 1 kVA transformer, Catalog No. Q1C0ERCB, is rated 120 x 240 to 12 x 24 volts. It is to be connected as an autotransformer to raise 208 to 230 volts single phase. When connected as an autotransformer in this application, the kVA rating is increased to 9.58 kVA, or 9,580 VA. This is the rating to be used for determining the full load input amps and the corresponding size of the overcurrent protection device, either a fuse or breaker. Full load input amps = 9,580 Volt Amps = 46 Amp, 208 Volts When the full load current is greater than 9 amps, the overcurrent protection device - usually a fuse or nonadjustable breaker, the current rating can be up to 125 percent of the full load rating of the autotransformer input current. Max. current rating of the overcurrent device = 46 amps x 125% = 57.5 amps The National Electrical Code, Article 450-4 (a) Exception, permits the use of the next higher standard ampere rating of the overcurrent device. This is shown in Article 240-6 of the N.E.C. Max. size of the fuse or circuit breaker = 60 amps © Hammond Power Solutions Inc. 98 Data subject to change without notice.
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