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I I n n s s t t a a l l l l a a t t i i o o n n - - E E l l e e c c t t r r i i c c a a l l
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.
Table 15.
Number of compressors
SCWMN
SCWMN
MSC
04L
66cc - ZPV0662
1
96cc - ZPV0962
0
ZP154KCE-TE
0
ZP181KCE-TE
1
Table 16.
Number of fans
Drive (K3G500) - Motor (M3G150-IF)
Table 17.
Compressor electrical data
MSC Compressor
Tons
66CC - ZPV0662 (VFD)
10
ZP181KCE-TE
15
96CC-ZPV0962 (VFD)
13
ZPV154KCE-TE
Table 18.
Fan motor electrical data
Drive (K3G500) - Motor (M3G150-IF)
42
SCWMN
SCWMN
SCWMN
40
05L
50
0
1
0
1
0
1
0
2
2
1
0
0
40 Tons
50 Tons
3
200
RLA
LRA
-
-
55.77
340
-
-
51.28
300
200
INPUT
18.6
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.
SCWMN
SCWMN
SCWMN
06L
60
07L
1
0
1
0
1
0
0
0
3
2
2
0
60 Tons
70 Tons
3
4
5
460
RLA
LRA
MAX INPUT MAX INPUT
-
-
23.72
110
-
-
23.7
150
460
INPUT
9
SCWMN
SCWMN
70
08L
80
0
1
0
1
0
1
3
0
0
0
3
3
80 Tons
5
200
460
56
30
-
-
84
60
-
-
PKG-SVX027C-EN
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