Page 34 - HVAC Pump Handbook

Rishel_CH02.qxd 20/4/06 5:13 PM Page 31

Physical Data for HVAC System Design

Physical Data for HVAC System Design 31

TABLE 2.8 Standard 60-Hz Voltages

Motor nameplate voltage
Nominal distribution
system voltage Below 125 hp 125 hp and up
Polyphase
208 200 —
240 230 —
480 460 460
600 575 575
2400 2300 2300
4160 4000 4000
Single-phase
120 115 —
208 200 —
240 230 —

SOURCE: AC Motor Selection and Application Guide, Bulletin GET
6812B, General Electric Company, Fort Wayne, Ind., 1993, p. 2; used
with permission.

TABLE 2.9 Standard 50-Hz Voltages
Nominal distribution Motor nameplate voltage
system voltage Below 125 hp 125 hp and up
Polyphase (see note) 200 200
220 —
380 380
415 415
440 440
550 550
3000 3000
Single-phase (see note) 110 —
200 —
220 —
NOTE: Distribution system voltages vary from country to country;
therefore, motor nameplate voltage should be selected for the country
in which the motor will be operated.
SOURCE: AC Motor Selection and Application Guide, Bulletin GET
6812B, General Electric Company, Fort Wayne, Ind., 1999, p. 2; used
with permission.

have standardized on 50 Hz; there also may be rural areas of the
United States still operating on 50-Hz power. Tables 2.8 and 2.9 pro-
vide nominal power distribution voltages and standard nameplate
voltages for motors operating at both 60 and 50 Hz. Electric power
utilities are allowed a variation of 5 percent from the distribution
system voltages listed in these tables.

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