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SSI
ERP2U Power Supply Design Guide, V1.0
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power supplies shall continue to operate with no interruption of performance. It is required that all redundant
power supply modules be present to support redundant AC inlets.
5.3 AC Input Voltage Specification
STATUS
Required
The power supply must operate within all specified limits over the following input voltage range. Harmonic
distortion of up to 10% THD must not cause the power supply to go out of specified limits. The power supply shall
operate properly at 85 VAC input voltage to guarantee proper design margins.
Table 2: AC Input Rating
PARAMETER
MIN RATED MAX 350W Max
Rated Input
Current
480W Max
Rated Input
Current
Voltage (110)
90 V
rms
100-127
V
rms
140 V
rms
5.5 A
rms
1
7.0 A
rms
1
Voltage (220)
180 V
rms
200-240
V
rms
264 V
rms
2.3 A
rms
1
3.5 A
rms
1
Frequency 47 Hz 63 Hz
1 Maximum rated input current is measured at 100 VAC and 200 VAC.
5.4 Efficiency
STATUS
Required
The power supply shall have a minimum efficiency shown in the table below for the different power ratings. The
power dissipated within the sub-system shall be kept to less than 150W. The sub-system shall meet the minimum
efficiency at 100VAC and maximum output load.
Table 3: Efficiency
Output
Power
Minimum
Efficiency
350W 70%
480W 77%