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7. AC Connection and Wiring
Safety
Read Section 2, Safety, carefully before connecting AC to the Galaxy Power System.
Wire Sizing and Ampacity
Standard Ga
10
1/0
2/0
3/0
4/0
Note: For NEC code compliance, all conductor sizing calculations for derating due to ambient
temperature and the number of conductors in a conduit are made assuming 90°C rated
conductors.
AC Input Schemes
GPS 4848/100: 595 Rectifiers (48V, 200A) and 595LT Rectifiers (48V, 220A)
595 and 595LT series rectifier input and output voltages are as shown below.
380-480Vac, 3-phase, 50/60 Hz
200-240Vac, 3-phase, 50/60 Hz
The GPS 4848/100 system supports three AC schemes:
·
Single bulk 3-wire (3-phase): The panel is factory-equipped to distribute the appropriate
connections to the rectifiers through circuit breakers.
·
Multiple bulk 3-wire (3-phase): The panel is factory-equipped to distribute the appropriate
connections to the rectifiers through circuit breakers.
·
Multiple 3-wire (3-phase): Connected directly to the terminal strips, which then, distribute the ac
power to the rectifiers. One feed for each rectifier, external circuit overload protection, must be
provided by customer.
Note: All wire sizes are based on the US National Electric Code.
Page 55
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Table 7-A: Wire Sizing and Ampacity
Input
2
Metric (mm
)
10
16
25
35
50
70
95
120
Rectifier
595A and 595LTA series
595B and 595LTB series
NEC Table 310.15(B)(16)
(Formally Table 310.16)
see Note
40
55
75
95
130
170
195
225
260
Output
48Vdc / 220A
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