Bryant 566D User Manual page 73

UNIT
524A-B V*-PH-Hz
524A-C
208/230-1-60
208/230-3-60
072
460-3-60
575-3-60
208/230-1-60
208/230-3-60
090
460-3-60
575-3-60
208/230-3-60
120 460-3-60
575-3-60
208/230-3-60
150 460-3-60
575-3-60
208/230-3-60
180 460-3-60
575-3-60
208/230-3-60
240 460-3-60
575-3-60
208/230-3-60
300 460-3-60
575-3-60
LEGEND
FLA — Full Load Amps
MOCP — Maximum Overcurrent Protection
*Motors are designed for satisfactory operation within 10% of nominal
voltages shown. Voltages should not exceed the limits shown in the
Voltage Limits column.
NOTES:
1. Minimum circuit amps (MCA) and MOCP values are calculated in
accordance with NEC (National Electrical Code) Article 440.
2. Motor FLA values are established in accordance with UL (Under-
writers' 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 per-
centage of voltage imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Example: Supply voltage is 460-3-60.
AB = 393 v
BC = 403 v
AC = 396 v
Average Voltage =
ELECTRICAL DATA (cont)
524A-B,C ALTERNATE MOTORS
VOLTAGE
LIMITS
187-253
187-253
414-506
518-632
187-253
187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632
187-253
414-506
518-632
393 + 403 + 396
3
1192
=
3
= 397
FAN MOTOR
Hp (kW) FLA
2.4 (1.79) 11.0
2.9 (2.16) 7.5
2.9 (2.16) 3.4
2.0 (1.49) 2.3
2.4 (1.79) 11.0
2.9 (2.16) 7.5
2.9 (2.16) 3.4
3.0 (2.24) 3.8
3.7 (2.76) 10.2
3.7 (2.76) 4.8
3.0 (2.24) 3.8
3.7 (2.76) 10.2
3.7 (2.76) 4.8
5.0 (3.73) 5.1
5.0 (3.73) 14.6/12.8
5.0 (3.73) 6.4
5.0 (3.73) 5.1
7.5 (5.59) 21.5/19.4
7.5 (5.59) 9.7
7.5 (5.59) 7.8
10.0 (7.46) 28.2/26.8
10.0 (7.46) 13.4
10.0 (7.46) 10.3
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 of voltage imbalance.
% Voltage Imbalance = 100 x
= 1.5%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
73
POWER SUPPLY
Minimum Circuit
MOCP
Amps
13.8 20
9.4 15
4.3 15
2.9 15
13.8 15
9.4 15
4.3 15
4.8 15
12.8 20
6.0 15
4.8 15
12.7 20
6.0 15
6.4 15
18.3/16.0 30/25
8.0 15
6.4 15
26.9/24.3 45/40
12.1 20
9.8 15
35.3/33.5 60/60
16.8 30
12.9 20
6
397