Siemens Standby Generators Manual 

Text of Siemens Standby Generators User Guide:

• Generator Sizing Guide General Information Important Notice This booklet is designed to familiarize estimators and installers with proper sizing guidelines for residential and commercial generators. The information is not comprehensive, nor does it replace or supercede any material contained in any of the written documents shipped with the equipment. This booklet sh

• Generator Sizing Guide Table 1 – Motor Load Reference AC and Heat Pumps Running Load Starting Load Running Amps at Amps at Amps at Starting LR Amps LR Amps LR Amps Description Hp kW 240V 1ø 208V 3ø 480V 3ø kW at 240V 1ø at 208V 3ø at 480V 3ø 1 Ton (12,000 BTU) 1 1 5 3 1 3 25 17 7 2 Ton (24,000 BTU) 2 2 10 7 3 6 50 33 14 3 Ton (36,000 BTU) 3 3 15 10 4 9 75 50 22 4 Ton (48,000 BTU)

• Siemens Standby Generators, Generator Sizing Guide Table 2 – Non-Motor Load Reference General Residential Running Load Amps at Amps at Description kW 120V 1ø 240V 1ø Electric heat per 1000 ft. 2 12 n/a 50 Heat pump elements per 1000 ft. 2 7 n/a 29 Dryer 5.5 n/a 23 Hot tub 5 n/a 21 Range oven 5 n/a 21 Hot water 4.5 n/a 19 Stove top per burner 1.5 n/a 6 General receptacles per 1000 ft. 2 1 8.3 n/a Lighting per 1000 ft. 2 0.75 6.3 n/a Blow dryer 1.25 10.4 n/a Dishwasher 1.5 12.5 n/a Microwave 1 8.3 n/a Toasters 1 8.3 n/a 3

• Siemens Standby Generators, Generator Sizing Guide Table 3 – Surge Capability Siemens Liquid Cooled Generators Operating at <3600 RPM Rated Output Surge Capability Surge Capability (Running Amps) LR Amps at 15% Voltage Dip LR Amps at 30% Voltage Dip Size (kW) 240V 1ø 208V 3ø 480V 3ø 240V 1ø 208V 3ø 480V 3ø 240V 1ø 208V 3ø 480V 3ø 25 104 87 38 71 47 26 133 89 52 70 292 243 105 275 183 106 550 366 212 80 333 278 120 275 183 106 550 366 212 100 417 347 150 371 247 142 738 491 284 130 542 451 195 546 364 209 1088 724 419 Siemens Generators Operating at 3600 RPM Ra

• Siemens Standby Generators, Generator Sizing Guide Table 4 – Fuel Pipe Sizing Natural Gas Pipe Size (in.) kW 0.75" 1" 1.25" 1.5" 2" 2.5" 3" 7 55 200 820 10 20 85 370 800 13 10 50 245 545 16 40 190 425 20 20 115 265 950 25 10 75 180 660 35 35 95 370 915 45 15 60 260 650 60 25 145 390 1185 70 5 75 225 710 80 65 195 630 100 40 140 460 130 50 215 150 30 150 LP vapor (LPV) Pipe Size (in.) kW 0.75" 1" 1.25" 1.5" 2" 2.5" 3" 7 165 570 10 70 255 1000 13 45 170 690 16 30 130 540 20 15 80 340 745 25 50 235 520 35 20 125 290 1030 45 82 195 725 60 45 115 445 1095 70 20 60 260 660 80 15 50 230 590

• Siemens Standby Generators, Generator Sizing Guide Table 5 – LP Vapor (LPV) Tank Sizing Vapor Withdrawal Tank Capacity Tank Capacity Length Diameter Overall Ht. Minimum Temp Tank Capacity Total (Gal.) Useable (Gal.) (Inches) (Inches) (Inches) (°F) (btu/hr.) 120 72 57 24 33 40 246,240 20 164,160 0 82,080 150 90 68 24 33 40 293,760 20 195,840 0 97,920 250 150 94 30 39 40 507,600 20 338,400 0 169,200 325 195 119 30 39 40 642,600 20 428,400 0 214,200 500 300 119 37 46 40 792,540 20 528,360 0 264,180 850 510 165 41 50 40

• Siemens Standby Generators, Generator Sizing Guide UPS Generator Compatibility Passive (also referenced as standby or off-line) and Line-Interactive These technologies are most common for personal workstations and point of sale applications. They are typically single phase equipment with size ranges of 350 VA – 2000 VA for passive and 500 VA to 5000 VA for line-interactive. Passive UPS’s are the simplest type. Under normal conditions AC power passes straight through to the UPS load. When the input power supply goes outside of specifications, the UPS transfers the load from input power to the internal DC to AC power inverter

• Siemens Standby Generators, Generator Sizing Guide Onsite Estimating Sheet Contractor _____________________________________________ Email _________________________________________________ Phone _________________________ Fax ___________________ Job Name _____________________________________________ Date___________ Location _______________________________ VOLTAGE  120/240 1Ø  120/208 3Ø  277/480 3Ø TYPE  Natural Gas  LP Vapor LPV) ELEC. SERVICE  100 Amp  200 Amp  400 Amp  600 Amp  Other________ Before installation contact local jurisdiction to confirm all requirements are met.

• Siemens Standby Generators, Generator Sizing Guide Onsite Estimating Sheet Generator Sizing Instructions: There is not a single correct sizing solution. The instructions below identify multiple methods that, when mixed with good judgment, should result in a moderately sized generator. Remember to consider load growth, seasonality, and effects of starting motors. When motors start, they create a current surge that step loads the generator. As a result of this step loading, the generator will experience a voltage dip. After selecting a generator, reference the generator's surge capability using Table 3. Verify that the generator voltage dip is adequate for the application. Most commercial applications shou

• Siemens Standby Generators, Generator Sizing Guide Onsite Estimating Sheet Contractor _____________________________________________ Email _________________________________________________ Phone _________________________ Fax ___________________ Job Name _____________________________________________ Date___________ Location _______________________________ VOLTAGE  120/240 1Ø  120/208 3Ø  277/480 3Ø TYPE  Natural Gas  LP Vapor LPV) ELEC. SERVICE  100 Amp  200 Amp  400 Amp  600 Amp  Other________ Before installation contact local jurisdiction to confirm all requireme

• Siemens Standby Generators, Generator Sizing Guide Onsite Estimating Sheet Generator Sizing Instructions: There is not a single correct sizing solution. The instructions below identify multiple methods that, when mixed with good judgment, should result in a moderately sized generator. Remember to consider load growth, seasonality, and effects of starting motors. When motors start, they create a current surge that step loads the generator. As a result of this step loading, the generator will experience a voltage dip. After selecting a generator, reference the generator's surge capabilit

• Generator Sizing Guide Onsite Estimating Sheet Contractor _____________________________________________ Email _________________________________________________ Phone _________________________ Fax ___________________ Job Name _____________________________________________ Date___________ Location _______________________________ VOLTAGE  120/240 1Ø  120/208 3Ø  277/48

• Siemens Standby Generators, Generator Sizing Guide Onsite Estimating Sheet Generator Sizing Instructions: There is not a single correct sizing solution. The instructions below identify multiple methods that, when mixed with good judgment, should result in a moderately sized generator. Remember to consider load growth, seasonality, and effects of starting motors. When motors start, they create a current surge that step loads the generator. As a result of this step loading, the generator will experience a voltage dip. After sele

• Siemens Standby Generators, Siemens Energy & Automation, Inc. 3333 Old Milton Parkway Alpharetta, GA 30005 1-800-964-4114 [email protected] www.sea.siemens.com/generators RPSA-GENSZ-0506 New 3M0506B&A Printed in USA ©2006 Siemens Energy & Automation, Inc. All Rights Reserved Siemens is a registered trademark of Siemens AG. Product names mentioned may be trademarks or registered trademarks of their respective companies. Specifications are subject to change without notice.

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