Generator

The tool takes the voltage and the required load in amps, or a kVA, and finds the smallest generator in its table. Choose the transfer switch and it sizes the breaker, conductors, EGC, raceway, SBJ and GEC, and draws the one-line.

The platform - now showing Generator

The drawing

The one-line the Suite drew for a 225 A load at 480 V with a 4-pole, switched-neutral transfer switch. Each numbered note matches a line of the report.

Drawing the program wrote: 150 kW standby generator, 300 A output breaker, 4 x 250 kcmil Cu THHN with a 4 AWG Cu EGC in 2-1/2 in EMT, and a 4-pole transfer switch rated for at least 300 A. With the switched neutral it is a separately derived system: SBJ and GEC 2 AWG Cu at the generator.
150 kW standby generator, 300 A output breaker, 4 x 250 kcmil Cu THHN with a 4 AWG Cu EGC in 2-1/2 in EMT, and a 4-pole transfer switch rated for at least 300 A. With the switched neutral it is a separately derived system: SBJ and GEC 2 AWG Cu at the generator.

The report it writes

The report the Suite wrote for this example: the inputs, the seven figures, and the one-line on the second page.

Report page the program wrote: Page 1 of 2
Page 1 of 2
Report page the program wrote: Page 2 of 2
Page 2 of 2

Inputs 480 V and 225 A; smallest generator 187 kVA / 150 kW, 300 A breaker, 4 x 250 kcmil Cu, 4-pole switched-neutral transfer switch, SBJ / GEC 2 AWG Cu.

The example, step by step

Entered by hand: 480 V and a 225 A load, worked out with Find Generator, then a 4-pole, switched-neutral transfer switch chosen for the one-line.

  1. Generator in Stinger Pro: The example in, before it is worked out: 480 V and a 225 A required load, the transfer switch not yet chosen, and the generator table from 18.7 to 187 kVA.

    STEP 1 OF 4The example in, before it is worked out: 480 V and a 225 A required load, the transfer switch not yet chosen, and the generator table from 18.7 to 187 kVA.

  2. Generator in Stinger Pro: Find Generator (amps → size): smallest generator 187 kVA / 150 kW, 225 A at 480 V. With the 4-pole, switched-neutral transfer switch chosen, the one-line is drawn.

    STEP 2 OF 4Find Generator (amps → size): smallest generator 187 kVA / 150 kW, 225 A at 480 V. With the 4-pole, switched-neutral transfer switch chosen, the one-line is drawn.

  3. Generator in Stinger Pro: The full one-line, the separately derived system note, and the seven figures under it: 300 A breaker, 4 x 250 kcmil Cu, 4 AWG Cu EGC, 2-1/2 in EMT, SBJ / GEC 2 AWG Cu.

    STEP 3 OF 4The full one-line, the separately derived system note, and the seven figures under it: 300 A breaker, 4 x 250 kcmil Cu, 4 AWG Cu EGC, 2-1/2 in EMT, SBJ / GEC 2 AWG Cu.

  4. Generator in Stinger Pro: Further down: the seven figures, then the generator table, where 187 kVA / 150 kW reads 225 A at 480 V.

    STEP 4 OF 4Further down: the seven figures, then the generator table, where 187 kVA / 150 kW reads 225 A at 480 V.