42
PKG-SVX027C-EN
Selection Procedures
•
RLA = Rated Load Amps
•
Compressor LRA = Locked Rotor Amps
•
Compressor Input = VFD drive Input
•
Compressor Output = VFD drive output
•
Voltage utilization range is ±10%
Determination of Minimum Circuit
Ampacity (MCA)
MCA = 1.25 x Largest motor amps/VFD Input + the sum
of the remaining motor amps.
Determination of Max Fuse (MFS) and Max
Circuit Breaker (MCB) Sizes
MFS and MCB = 2.25 x Largest motor amps (RLA)/VFD
input) + the sum of the remaining motor amps.
If the rating value calculation does not equal a standard
over current protective device rating, use the next
lower standard rating as the maximum.
Table 15.
Number of compressors
MSC
SCWMN
04L
SCWMN
40
SCWMN
05L
SCWMN
50
SCWMN
06L
SCWMN
60
SCWMN
07L
SCWMN
70
SCWMN
08L
SCWMN
80
66cc - ZPV0662
1
0
1
0
1
0
1
0
1
0
96cc - ZPV0962
0
1
0
1
0
1
0
1
0
1
ZP154KCE-TE
0
0
2
2
0
0
3
3
0
0
ZP181KCE-TE
1
1
0
0
2
2
0
0
3
3
Table 16.
Number of fans
40 Tons
50 Tons
60 Tons
70 Tons
80 Tons
Drive (K3G500) - Motor (M3G150-IF)
3
3
4
5
5
Table 17.
Compressor electrical data
Tons
MSC Compressor
200
460
200
460
RLA
LRA
RLA
LRA
MAX INPUT MAX INPUT
10
66CC - ZPV0662 (VFD)
-
-
-
-
56
30
15
ZP181KCE-TE
55.77
340
23.72
110
-
-
96CC-ZPV0962 (VFD)
-
-
-
-
84
60
13
ZPV154KCE-TE
51.28
300
23.7
150
-
-
Table 18.
Fan motor electrical data
200
460
INPUT
INPUT
Drive (K3G500) - Motor (M3G150-IF)
18.6
9
