Carrier 38AUD*12 Series, Инструкция по установке, запуску и обслуживанию, Страница: 56 / 80

16
Table 8 – Electrical Data — 38AUD*16--25 50 Hz Units
UNIT V-Ph-Hz
VOLTAGE
RANGE‡
COMPRESSOR 1 COMPRESSOR 2 OFM (ea)
MCA
FUSE
SIZE
MIN MAX RLA LRA RLA LRA WATTS FLA
SIZE
38AUD*16 400---3---50 380 420 12.2 101 12.2 101 325 0.7 29.6 40
38AUD*25 400---3---50 380 420 16.7 111 16.7 111 325 0.7 40.4 50
Legend and Notes for Table 8
LEGEND:
FLA --- Full Load Amps
LRA --- Locked Rotor Amps
MCA --- Minimum Circuit Amps
LRA --- Locked rotor amps
NEC --- National Electrical Code
RLA --- Rated Load Amps
‡
Units are suitable for use on electrical systems where voltage
supplied to the unit terminals is not below or above the listed
limits.
NOTES :
1. In compliance with NEC requirements for multimotor and
combination load equipment (refer to NEC Articles 430 and
440), the overcurrent protective device for the unit shall be
fuse or HACR breaker.
2. The MCA values are calculated in accordance with the NEC.
Article 440.
3. Motor RLA and LRA values are established in accordance
with Underwriters’ Laboratories (UL). Standard 1995.
4. 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 230-3-60
% Voltage Imbalance = 100 x
max voltage deviation from average voltage
average voltage
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
(224 + 231 + 226)
=
681
3 3
= 227
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
(BC) 231 – 227 = 4 v
(AC) 227 – 226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
4
227
= 1.76%
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.
38A
U
D