Alpha Technologies AMP24 HP - Manual (Page 31)

29 Doc. #: 0260011-J0 Rev B
The recommendations in Table G 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 G — 18kVA and 13.5kVA, 120V/208V 3-Phase
Systems
Models
AMPS24-3-18-i3
(4i Shelf)
0260012-205
AMPS24-3-13.5-H3
(3i+1R Shelf)
0260011-105
AC Input
AC Input Voltage 120/208V 120/208V
Full Load AC Input Current
(per phase)
56A 59A
AC Input poles & wiring 4 w + G 4 w + G
Wiring 3Ф Wye 3Ф Wye
SCCR 1600A 1600A
Recommended
AC input Breaker/fuse
(Note: 2)
80A 80A
Recommended
AC Input Wire size,
90ºC copper (Note 1)
NEC 50ºC 4 4
CEC 50ºC 3 3
Total AC Output (Max) 18 kVA/ 14.4kW 13.5 kVA/ 10.8kW
AC Output
AC Output Voltage 120/208V 120/208V
AC Output poles & wiring 4 w + G 4 w + G
Wiring 3Ф Wye 3Ф Wye
AC Output Current (per Phase) 50A 37.5A
Installed Inverter Output
Circuit Breaker 100% rated
70A 70A
Recommended
AC Input Wire size,
90ºC copper (Note 1)
NEC 50ºC 4 4
CEC 50ºC 3 3
AC Input & Output
connection terminals
Box lugs are rated for both aluminum or copper wire, #2/0 to #6
AWG. Fasten clamping screw to 120 in-lbs (14 N-m)
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 for 50C applied.
Note 2: Maximum AC Utility Service protection feeding the AMPS24 is 150A. Actual supply circuit breaker
must be sized appropriately for the supply wire used. Consult your local and national electrical
codes. 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. Since the AC input to
systems without MBS is power factor corrected, AC wiring to systems without MBS does not require
double neutral wiring.