2-4
Specification Range
Storage temperature
–40°C to +70°C (–40°F to
+158°F)
Relative humidity
(noncondensing)
10% to 95%
Power Supply
Check that the power supply of the installation site is stable. The
centralized AC power system consisting of the AC mains, UPS, and
user-supplied diesel generator should be:
z Easy to connect
z Safe to operate
z Flexible to dispatch
z Convenient to maintain
The low-voltage power supply should adopt the single-phase
three-wire system.
Table 2-4 lists the nominal voltage and frequency
of the low-voltage AC power supply.
Table 2-4 Nominal voltage and frequency of the low-voltage AC
power supply
Power supply Nominal voltage Stable frequency
Single-phase
three-wire (V)
100 VAC to 240
VAC
50/60 Hz
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