Alpha Technologies AMPS80 HP - Manual (Page 26)

Doc. #: 026-069-B0 Rev F 24
The recommendations in Table F are for reference only. A registered professional engineer
must review and approve or modify these recommendations in compliance with applicable
national and local electrical and building codes.
NOTE:
Table F — 20 kVA, split-phase, 2-pole systems (AMPS80-2-20 series),
single AC feed
Model
AMPS80-2-20
AMPS80-2-
20-H2
AMPS80-2-
20, MBS
AMPS80-2-
20-H2, MBS
AC
input
Feed Single Single Single Single
AC input voltage
120/208 V
or 120/240 V
120/208 V
or 120/240 V
120/208 V
or 120/240 V
120/208 V
or 120/240 V
Full load AC input current per phase 71 A 148 A 89 A 166 A
AC input poles & wiring 3 w + G 3 w + G 3 w + G 3 w + G
Wiring 2-pole 2-pole 2-pole 2-pole
Recommended
AC input breaker/fuse2
90 A 200 A 125 A 225 A
Recommended
AC input wire size
90ºC copper1
NEC 30ºC #4 #2/0 #2 #3/0
CEC 30ºC #3 #3/0 #2 #4/0
NEC 40ºC #4 #2/0 #2 #3/0
CEC 40ºC #3 #3/0 #2 #4/0
AC
output
Total maximum AC output 20 kVA, 16 kW 20 kVA, 16 kW 20 kVA, 16 kW 20 kVA, 16 kW
AC output voltage
120/208 V
or 120/240 V
120/208 V
or 120/240 V
120/208 V
or 120/240 V
120/208 V
or 120/240 V
AC output poles & wiring 3 w + G 3 w + G 3 w + G 3 w + G
Wiring 2-pole 2-pole 2-pole 2-pole
AC output current per phase 83 A 83 A 83 A 83 A
Installed inverter input
& output circuit breaker
125 A 125 A 125 A 125 A
Recommended
AC output wire size
90ºC copper1
NEC 30ºC #2 #2 #2 #2
CEC 30ºC #2 #2 #2 #2
NEC 40ºC #1 #1 #1 #1
CEC 40ºC #1 #1 #1 #1
AC input & output
connection terminals
Box lugs are rated for either Aluminum or Copper wire, 350 kcmil to #6 AWG. Fasten clamping screw
to 42 N-m (375 in-lbs) for #1 AWG to 350 kcmil wire or 23 N-m (200 in-lbs) for #6 to #2 AWG wire.
Note 1
Inverter AC Input & AC Output connections: Calculations based on full load and charging current, 0.8 derating with 5
current carrying conductors, (L1,L2,L3,2XN) due to possible high harmonic content load. Temperature correction factor
applied when needed.
Note 2
Maximum AC utility service protection feeding the AMPS80 HP is 400 A. The actual supply circuit breaker must be sized
appropriately for the supply wire used. Consult your local and national electrical codes. The AC source must be limited to 18 kA
short circuit current. Double neutral is strongly recommended for AC output wiring (and AC input wiring to the MBS) for 3Ф systems
with significant non-linear (ie rectified capacitive) loads. Because the AC input to the inverters is power factor corrected, AC wiring
solely to the inverters does not require double neutral wiring.