Alpha Technologies AMPS80 HP - Manual (Page 25)

23 Doc. #: 026-069-B0 Rev F
The recommendations in Table E 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 E — 40 kVA, split-phase, 2-pole systems (AMPS80-2-40 series), dual AC feeds
Model
Dual feed with separate AC
feed for inverters/MBS and
rectifiers
AMPS80-2-40-H2
AMPS80-2-40-H2,
MBS
AC
input
AC feed Inverter feed Rectifier feed Inverter/MBS feed Rectifier feed
AC input voltage
120/208 V
or 120/240 V
208 V or 240 V
120/208 V
or 120/240 V
208 V
or 240 V
Full load AC input current per phase 148 A 77 A 179 A 77 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
200 A 100 A 225 A 100 A
Recommended
AC input wire size
90ºC copper1
NEC 30ºC #2/0 #3 #3/0 #3
CEC 30ºC #3/0 #3 #4/0 #3
NEC 40ºC #2/0 #3 #3/0 #3
CEC 40ºC #2/0 #3 #4/0 #3
AC
output
Total maximum AC output 40 kVA, 32 kW 40 kVA, 32 kW
AC output voltage 120/208 V or 120/240 V 20/208 V or 120/240 V
AC output poles & wiring 3 w + G 3 w + G
Wiring 2-pole 2-pole
AC output current per phase 167 A 167 A
Installed inverter input
& output circuit breaker
250 A 250 A
Recommended
AC output wire size
90ºC copper1
NEC 30ºC #4/0 #4/0
CEC 30ºC 250 kcmil 250 kcmil
NEC 40ºC 250 kcmil 250 kcmil
CEC 40ºC 300 kcmil 300 kcmil
AC input & output
connection terminals
Box lugs are rated for either Aluminum or Copper wire, 350 kcmil to #6 AWG. Fasten clamping screw to
375 in-lbs (42 N-m) for #1 AWG to 350 kcmil wire or 200 in-lbs (23 N-m) for #6 to #2 AWG wire.
Rectifier connection
terminals
Box lugs are rated for either Aluminum or Copper wire, #2/0 to #6 AWG. Fasten clamping screw to 14
N-m (120 in-lbs)
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.