Features, Benefits and Functions

Transcription

1 -8 Buck-Boost and Lighting Single- and Three-Phase February 007 Single- and Three-Phase Applications, 60 Hz Type EP Product Description Types EP, EPT Sand and Resin Encapsulated design. Suitable for indoor or outdoor applications. Totally enclosed, non-ventilated enclosures. Enclosures are NEMA R rated. Mountable in any position indoors and upright only outdoors. 8ºC insulation system. ºC rise standard; 80 C rise optional. Available in single-phase ratings through. Application Description A buck-boost transformer is used to provide an economical method of correcting a lower or higher voltage rating more suitable for efficient operation of electrical equipment. Type EP Buck-Boost transformers are small, single-phase transformers with dual primary and dual secondary windings and are usually connected as autotransformers by utilizing one unit for single-phase applications and either two or three units banked for three-phase operation. They are primarily used for motor operation and should not be used for motor control circuits, to correct fluctuating line voltage or to obtain a neutral on a delta system. Buck-boost transformers are ideally suited for use with low voltage lighting systems, such as outdoor lighting. Features, Benefits and Functions UL listed. 60 Hz operation. 600 volt class insulation. Short-term overload capability as required by ANSI. Meet NEMA ST-0 sound levels. Standards and Certifications Industry Standards All Cutler-Hammer dry-type distribution and control transformers by Eaton Corporation are built and tested in accordance with applicable NEMA, ANSI and IEEE Standards. All 600 volt class transformers are UL listed unless otherwise noted. Seismically Qualified Cutler-Hammer manufactured dry-type distribution transformers are seismically qualified, and exceed requirements of the Uniform Building Code (UBC), International Building Code (IBC) and California Code Title 4. Options and Accessories Please refer to Page -46. Product Specifications Frequency Cutler-Hammer buck-boost transformers are designed for 60 Hz operation. Overload Capability Short-term overload is designed into transformers as required by ANSI. Dry-type distribution transformers will deliver 00% nameplate load for one-half hour; 0% load for one-hour; and % load for four-hours without being damaged provided that a constant 0% load precedes and follows the overload. See ANSI C for additional limitations. Continuous overload capacity is not deliberately designed into a transformer because the design objective is to be within the allowed winding temperature rise with nameplate loading. Insulation System and Temperature Rise Industry standards classify insulation systems and rise as shown below: Table -7. Insulation System Classification Ambient + Winding Rise 40 C 40 C 40 C 40 C C 80 C C 0 C + Hot Spot 0 C 0 C 0 C 0 C = Temp. Class 0 C 0 C 8 C 0 C The design life of transformers having different insulation systems is the same the lower temperature systems are designed for the same life as the higher temperature systems. Enclosures Cutler-Hammer encapsulated buckboost transformers utilize a NEMA R rated enclosure. Sound Levels All Cutler-Hammer 600 volt class general purpose dry-type distribution transformers are designed to meet NEMA ST-0 sound levels listed here. These are the sound levels measured in a soundproof environment. Actual sound levels measured at an installation will likely be higher due to electrical connections and environmental conditions. Lower sound levels are available and should be specified when the transformer is going to be installed in an area where sound may be a concern. Table -8. Average Sound Levels NEMA ST-0 Average Sound Level in db Up to. kv Encapsulated Currently being reviewed and revised by NEMA. Winding Terminations Primary and secondary windings are terminated in the wiring compartment. Encapsulated units have copper leads or stabs brought out for connections. Lugs are not supplied with these transformers. Eaton recommends external cables be rated 0 C (sized at 7 C ampacity) for encapsulated designs. CA08000E

2 February 007 Buck-Boost and Lighting Single- and Three-Phase - Series-Multiple Windings Series-multiple windings consist of similar coils in each winding which can be connected in series or parallel (multiple). with seriesmultiple windings are designated with an X or / between the voltage ratings, such as voltages of 0/40 or 40 X 480. If the series-multiple winding is designated by an X, the winding can be connected only for a series or parallel. With the / designation, a mid-point also becomes available in addition to the series or parallel connection. As an example, a 0 X 40 winding can be connected for either 0 (parallel) or 40 (series), but a 0/40 winding can be connected for 0 (parallel), or 40 (series), or 40 with a 0 mid-point. Technical Data and Specifications Please refer to Page -4. Note: When installation is to be made on a grounded system, consideration must be given to the resulting voltage. Thus, on a 08 grounded wye/0 system the voltage can be boosted to 40 volts but the voltage to ground will be volts. If 40/0 volts with a mid-point ground is needed, a standard two-winding transformer must be used. The following formulas can be used to calculate specific requirements. For Single-Phase: LOAD For Three-Phase: Load Voltage x Full Line Amperes = Line Load Voltage x.7 x LOAD = Full Load Amperes Product Selection For quick selection data, refer to the tables on the following pages. Selection Requirements You should have the following information before selecting a buck-boost transformer. Line Voltage The voltage that you want to buck (decrease) or boost (increase). This can be found by measuring the supply line voltage with a voltmeter. Load Voltage The voltage at which your equipment is designed to operate. This is listed on the nameplate of the load equipment. Load Amperes or Load You do not need to know both one or the other is sufficient for selection purposes. This information usually can be found on the nameplate of the equipment that you want to operate. Frequency The supply line frequency must be the same as the frequency of the equipment to be operated Eaton s Cutler- Hammer Buck-Boost operate at 60 Hz only. Phase The supply line should be the same as the equipment to be operated either single or three-phase. Transformer Interconnection For three-phase applications, interconnections of transformers should be made in a junction box. Two or three transformers may be used depending on an open delta () or wye () connection. -Step Selector The tables which follow will simplify the selection of the buck-boost transformers. There are no calculations needed; simply follow these steps.. Refer to the table having the same output voltage as the equipment you want to operate. For example, if you are installing a 40 volt 6 single-phase load use Selection Table -.. Select the available line voltage across the top of the chart which is closest to the actual supply voltage. Therefore, for example, if the available line voltage is volts, use the volt column.. Read down the column until you reach an output or amps rating equal to or greater than the load requirements. Since 6, in the example, is not listed, use the next higher rating or. 4. Read across to the far left columns for the catalog number and quantity of transformers for your application. In this case, you will need one () catalog number S0N06A0N.. Connect the buck-boost transformer(s) you have selected in accordance with the connection diagram specified at the bottom of the available line voltage column. In this example, Diagram F would be used. Note: For -phase connections and -phase open delta connections, inputs and outputs may be reversed. capacity remains constant. Additional Product Selection information begins on Page -64. CA08000E

3 -00 Buck-Boost and Lighting Single- and Three-Phase February 007 Wiring Diagrams Diagram A Diagram B Diagram C X X X X X X X X X H H H H H H Diagram D Diagram E Diagram F H H H X X X X X X X X X H H H H H H H H H Diagram G Diagram H Diagram I X X X X X X X X X X X X H H H H H H H H H Vo Diagram J Diagram K Diagram L X X X X X X X X X X X X X X X X X X H H H H H H H H H H H H H H H H Diagram M Diagram N Diagram O X X X X X X X X X X X X X X X X X X X X X H H H H H H H X X X X H X X H H H H H H H H H H H H H H Neutral Neutral Neutral Diagram P Diagram Q Diagram R X X X X X X X X X X X X X X X X X X X X X X X X X X X H H H H H H H H H H H H H H H H H H H H H H H H H H Neutral Neutral Neutral Diagram S Diagram T Diagram U X X X X X X X X X X X X X X X X X X H H H H H H H H H H H H Neutral Figure -6. Buck-Boost Wiring Diagrams WARNING! If input is -wire, neutral connection must be isolated and insulated! When used to supply a -phase, 4-wire load, the source must be -phase, 4-wire wye. CA08000E

4 February 007 Buck-Boost and Lighting Single- and Three-Phase -0 Table -. Selection Information C Temp. Rise 0 x 40 Volts to /4 Volts Dimensions (Inches) Weight Dimensions (mm) Height Width Depth Lbs. Height Width Depth 6-/ 6-/ 6-/ 6-/ 6-/ 8-/8 8-/8 0-/4 0-/4 4-/ x 40 Volts to 6/ Volts / 6-/ 6-/ 6-/ 6-/ 8-/8 8-/8 0-/4 0-/4 4-/ x 480 Volts to 4/48 Volts / 6-/ 6-/ 6-/ 6-/ 8-/8 8-/8 0-/4 0-/4 4-/ /8-7/8-7/8 4-7/8 4-7/ /6 6-/6 7-/6 0-/8 0-/8-7/8-7/8-7/8 4-7/8 4-7/ /6 6-/6 7-/6 0-/8 0-/8-7/8-7/8-7/8 4-7/8 4-7/ /6 6-/6 7-/6 0-/8 0-/8 -/ -/ -/ -7/8 4-/8 -/4 -/4 6-/8 6-/8 8-7/8-7/8 -/ -/ -/ -7/8 4-/8 -/4 -/4 6-/8 6-/8 8-7/8-7/8 -/ -/ -/ -7/8 4-/8 -/4 -/4 6-/8 6-/8 8-7/8-7/ Weight kg Frame FR FR4 FR FR6 FR7 FR8A FRA FR67 FR68 FR76 FR77 FR78 FR FR4 FR FR6 FR7 FR8A FRA FR67 FR68 FR76 FR77 FR78 FR FR4 FR FR6 FR7 FR8A FRA FR67 FR68 FR76 FR77 FR78 S0N04A8N S0N04A8N S0N04A8N S0N04A6N S0N04AN S0N04A76N S0N04A0N S0N04A6N S0N04A0N S0N04A0N S0N04A0N S0N04A07N S0N06A8N S0N06A8N S0N06A8N S0N06A6N S0N06AN S0N06A76N S0N06A0N S0N06A6N S0N06A0N S0N06A0N S0N06A0N S0N06A07N S0N08A8N S0N08A8N S0N08A8N S0N08A6N S0N08AN S0N08A76N S0N08A0N S0N08A6N S0N08A0N S0N08A0N S0N08A0N S0N08A07N Discount Symbol DT- CA08000E

5 -0 Buck-Boost and Lighting Single-Phase February 007 Table -0. Single-Phase Volt Output Required, 60 Hz s Amps Amps Amps Amps Amps Connection Diagram D B B C A S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection Diagram A A A B B S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

6 February 007 Buck-Boost and Lighting Single-Phase -0 Table -. Single-Phase 0 Volt Output Required, 60 Hz s Amps Amps Amps Amps Amps Connection Diagram D B B C A S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection Diagram A A A B B S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

7 -04 Buck-Boost and Lighting Single-Phase February 007 Table -. Single-Phase 0 Volt Output Required, 60 Hz s Amps Amps Amps Amps Amps Connection Diagram G F G F E S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection Diagram E E E F F S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

8 February 007 Buck-Boost and Lighting Single-Phase -0 Table -. Single-Phase 40 Volt Output Required, 60 Hz s Amps Amps Amps Amps Amps Connection Diagram G F G F E S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection Diagram E E E F F S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

9 -06 Buck-Boost and Lighting Three-Phase February 007 Table -4. Three-Phase Open Delta Connection 0 Volt Output Required, 60 Hz s Amps Amps Amps Amps Amps Connection Diagram L K L K I S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps S0N04A8N S0N06A8N S0N04A8N Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection Diagram I I I K K S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

10 February 007 Buck-Boost and Lighting Three-Phase -07 Table -. Three-Phase Open Delta Connection 40 Volt Output Required, 60 Hz s Amps Amps Amps Amps Amps Connection Diagram L K L K I S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps S0N04A8N S0N06A8N S0N04A8N Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection Diagram I I I K K S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

11 -08 Buck-Boost and Lighting Three-Phase February 007 Table -6. Three-Phase Wye Connection 08 Volt Output Required, 60 Hz Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with -wire input. 4-wire output requires 4-wire wye input. s Amps Amps Amps Amps Amps Connection Diagram P N N O M S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps Connection Diagram M M M N N Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

12 February 007 Buck-Boost and Lighting Three-Phase -0 Table -7. Three-Phase Wye Connection 0 Volt Output Required, 60 Hz Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with -wire input. 4-wire output requires 4-wire wye input. s Amps Amps Amps Amps Amps Connection Diagram N N S M Q S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps Connection Diagram Q Q R R S Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

13 -0 Buck-Boost and Lighting Three-Phase February 007 Table -8. Three-Phase Wye Connection 40 Volt Output Required, 60 Hz Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with -wire input. 4-wire output requires 4-wire wye input. s Amps Amps Amps Amps Amps Connection Diagram N N M R Q S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N s Amps Amps Amps Amps Amps S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N Connection Diagram Q Q R R S Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

14 February 007 Buck-Boost and Lighting Three-Phase - Table -. Three-Phase Wye Connection 460 Volt Output Required, 60 Hz Note: WARNING! Three-phase autotransformers should never be used to obtain 4-wire output with -wire input. 4-wire output requires 4-wire wye input. s Output Output Amps Amps Amps Amps Amps Amps Amps Connection R R Q Q R R Q Diagram Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A8N S0N06A8N S0N04A6N S0N06A6N S0N04AN S0N06AN S0N04A76N S0N06A76N S0N04A0N S0N06A0N S0N04A6N S0N06A6N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A0N S0N06A0N S0N04A07N S0N06A07N Discount Symbol DT- CA08000E

15 - Buck-Boost and Lighting Single-Phase February 007 Table -0. Single-Phase Required, 60 Hz s /Output Voltage 00/40 0/77 46/80 6/80 78/46 46/47 Output Amps Amps Amps Amps Amps Amps Connection B B F E F F Diagram S0N08A6N S0N08AN S0N08A76N S0N08A0N S0N08A6N S0N08A0N S0N08A0N S0N08A0N S0N08A07N s /Output Voltage 46/480 48/480 77/0 480/46 04/480 8/480 Output Amps Amps Amps Amps Amps Amps Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection F E B E E F Diagram S0N08A6N S0N08AN S0N08A76N S0N08A0N S0N08A6N S0N08A0N S0N08A0N S0N08A0N S0N08A07N Discount Symbol DT- CA08000E

16 February 007 Buck-Boost and Lighting Three-Phase - Table -. Three-Phase Required, 60 Hz /Output Voltage 6/80 46/46 40/47 400/480 46/480 Amps Amps Amps Amps Amps Connection Diagram I N K N K s S0N08A6N S0N08AN S0N08A76N S0N08A0N S0N08A6N S0N08A0N S0N08A0N S0N08A0N S0N08A07N /Output Voltage 460/48 47/80 04/480 8/480 Output Output Output Output Amps Amps Amps Amps Refer to Page -00 for Buck-Boost wiring diagrams. Note: Output available at reduced input voltage can be found by: x Output = New Rating Connection Diagram I N I K s S0N08A6N S0N08AN S0N08A76N S0N08A0N S0N08A6N S0N08A0N S0N08A0N S0N08A0N S0N08A07N Discount Symbol DT- CA08000E

17 -4 Buck-Boost and Lighting Autotransformer Applications February 007 Table -. Three-Phase Open Delta Connection 480 Volt Output Required, 60 Hz s Required Connection Diagram Output Output Output Amps Amps Amps S0NSN S60GSN S0NS76N S60GS76N S0NS0N S60GS0N S0NS6N S60GS6N S0NS0N S60GS0N S0NS0N S60GS0N U.S. On transformers supplied with standard taps, taps must be placed at nominal settings. Refer to Page -00 for Buck-Boost wiring diagrams. 4 6 I J T S0NS0N S60GS0N S0NS07N S60GS07N S0NS0N S60GS0N S0NSN S60NSN T0PS S60JSN T0PS7 T0PS0 Table -. Single-Phase 480 Volt Output Required, 60 Hz s Required Output Output Output Amps Amps Amps Connection Diagram U.S. On transformers supplied with standard taps, taps must be placed at nominal settings. Refer to Page -00 for Buck-Boost wiring diagrams. Note: Autotransformers can be used only where local electric codes permit and isolation of the two circuits is not required. 4 6 E H U S0NSN S60GSN S0NS76N S60GS76N S0NS0N S60GS0N S0NS6N S60GS6N S0NS0N S60GS0N S0NS0N S60GS0N S0NS0N S60GS0N S0NS07N S60GS07N S0NS0N S60GS0N S0NSN S60NSN T0PS S60JSN T0PS7 T0PS0 Note: Output voltage for lower input voltage can be found by: Note: Output available at reduced input voltage can be found by: x Input Actual Voltage = Output New Voltage. x Output = New Rating. Discount Symbol DT- CA08000E