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Table 5 — Electrical Data, Alternate Motors
Legend and Notes For Tables 4 and 5
LEGEND
*Motors are designed for satisfactory operation within 10% of nominal volt-
ages shown. Voltages should not exceed the limits shown in the Voltage Lim-
its column.
NOTES:
1. Minimum circuit amps (MCA) and MOCP values are calculated in accor-
dance with NEC (National Electrical Code), Article 440.
2. Motor FLA values are established in accordance with UL (Underwriters’
Laboratories) Standard 1995.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is
greater than 2%.
Use the following formula to determine the percentage of
voltage imbalance.
EXAMPLE: Supply voltage is 400-3-50.
AB = 393 v
BC = 403 v
AC = 396 v
Determine maximum deviation from average voltage.
(AB) 397 – 393 = 4 v
(BC) 403 – 397 = 6 v
(AC) 397 – 396 = 1 v
Maximum deviation is 6 v.
Determine percent voltage imbalance.
This amount of phase imbalance is satisfactory because it is below the maxi-
mum allowable 2%.
UNIT V*-PH-Hz
VOLTAGE
LIMITS
FAN MOTOR POWER SUPPLY
Hp (kW) FLA
Minimum
Circuit Amps
MOCP
40RM
007
208/230-1-60 187-253 2.4 (1.79) 11.0/11.0 13.8/13.8 20
208/230-3-60 187-253 2.9 (2.16) 7.5 9.4 15
460-3-60 414-506 2.9 (2.16) 3.4 4.3 15
575-3-60 518-632 2.0 (1.49) 2.4 3.0 15
230-3-50 207-253 2.4 (1.79) 5.2 6.5 15
400-3-50 360-440 2.4 (1.79) 2.6 3.3 15
40RM
40RMQ
40RMS
008
208/230-1-60 187-253 2.4 (1.79) 11.0 13.8 15
208/230-3-60 187-253 2.9 (2.16) 7.5/7.5 9.4/9.4 15
460-3-60 414-506 2.9 (2.16) 3.4 4.3 15
575-3-60 518-632 3.0 (2.24) 3.8 4.8 15
230-3-50 207-253 2.9 (2.16) 7.5 9.4 15
400-3-50 360-440 2.9 (2.16) 3.4 4.3 15
40RMS
010
208/230-1-60 187-253 2.4 (1.79) 11.0 13.8 20
208/230-3-60 187-253 2.9 (2.16) 7.5 9.4 15
460-3-60 414-506 2.9 (2.16) 3.4 4.3 15
575-3-60 518-632 3.0 (2.24) 3.8 4.8 15
230-3-50 207-253 2.9 (2.16) 7.5 9.4 15
400-3-50 360-440 2.9 (2.16) 3.4 4.3 15
40RM
40RMQ
40RMS
012
208/230-3-60 187-253 3.7 (2.76) 10.5/10.5 13.3/13.3 20
460-3-60 414-506 3.7 (2.76) 4.8 6.0 15
575-3-60 518-632 3.0 (2.24) 3.8 4.8 15
230-3-50 207-253 5.0 (3.73) 15.2 19.0 30
400-3-50 360-440 5.0 (3.73) 7.6 9.5 15
40RM
40RMS
014
208/230-3-60 187-253 3.7 (2.76) 10.2 12.7 20
460-3-60 414-506 3.7 (2.76) 4.8 6.0 15
575-3-60 518-632 5.0 (3.73) 5.1 6.4 15
230-3-50 207-253 5.0 (3.73) 15.2 19.0 30
400-3-50 360-440 5.0 (3.73) 7.6 9.5 15
40RM
40RMQ
40RMS
016
208/230-3-60 187-253 5.0 (3.73) 14.6/12.8 18.3/16.0 30/25
460-3-60 414-506 5.0 (3.73) 6.4 8.0 15
575-3-60 518-632 5.0 (3.73) 5.1 6.4 15
230-3-50 207-253 5.0 (3.73) 15.2 19.0 30
400-3-50 360-440 5.0 (3.73) 7.6 9.5 15
40RM
40RMQ
40RMS
024
208/230-3-60 187-253 7.5 (5.59) 21.5/19.4 26.9/24.3 45/40
460-3-60 414-506 7.5 (5.59) 9.7 12.1 20
575-3-60 518-632 7.5 (5.59) 7.8 9.8 15
230-3-50 207-253 7.5 (5.59) 22.8 28.5 50
400-3-50 360-440 7.5 (5.59) 11.4 14.3 25
40RM
40RMQ
40RMS
028
208/230-3-60 187-253 10.0 (7.46) 28.2/26.8 35.3/33.5 60/60
460-3-60 414-506 10.0 (7.46) 13.4 16.8 30
575-3-60 518-632 10.0 (7.46) 10.3 12.9 20
230-3-50 207-253 10.0 (7.46) 32.2 40.3 60
400-3-50 360-440 10.0 (7.46) 16.1 20.1 30
FLA — Full Load Amps
MOCP — Maximum Overcurrent Protection
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
393 + 403 + 396
3
=
1192
3
=
397
% Voltage Imbalance = 100 x
6
397
=1.5%
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.