NC-AD300E Manual
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Power type
UPS or Secondary power supply
Nominal voltage
220V AC
－
48V DC
Voltage input range
130v~250v normal
－
48V±15
％
ensure indicators
，
－
57V
～－
40V normal work
b)
Grounding Requirements
The engine room must have good grounding,and have separate protected. room of the
lighting protection system should be a separate system. its grounding system and used as a
reference to the power system and protected room is not shared.
c)
Temperature and Humidity
To ensure the device work normally and to extend the service life ,engine room needs to
maintain a certain temperature and humidity, If the room humidity is too high for a long period, it
could easily lead to bad insulation or insulation leakage, and also occurs materials, mechanical
properties change in such phenomena as corrosion of metal parts; if the relative humidity is too
low, causing shrinkage of insulating gasket will screw loose, in the dry weather conditions, but
also prone to static electricity, against device electronics; if the temperature is too high will
accelerate the aging process of insulating materials, so that the reliability of the device greatly
reduced, seriously affecting their life.
Temperature
Humidity
Transport and
storage
Long-term
work
conditions
Short-term
work
conditions
Long-term work
conditions
Short-term
work
conditions
－
20
℃～
60
℃
0
℃～
40
℃
－
5
℃～
45
℃
5%
～
85%
5%
～
90%
Description
The engine room temperature and humidity measurement refers to the equipment
rack before and after the failed to protect boards from the floors above 1.5m and 0.4m
from the equipment rack at the front of the measured values.
Short-term work refers to device work conditions, working continuously for less than
24 hours and an annual aggregate of not more than 15 days
d)
Others
The major harzard of device running safty is dust, that indoor dust attched to the
body ,leads to electrostatic adsorption, the metal connectors or metal contacts being exposed,
not only will affect the service life, but also easily lead to communication failures. When the
indoor relative humidity low, the easier to produce this electrostatic adsorption. Therefore,
dust needs to be done.
Despite the anti-lightning equipment has done a lot of considerations, but also taken the
necessary design and measures, but the lightning intensity over a certain area, it is still possible to
cause damage to equipment. In order to achieve a better lightning effectsit is recommended users:
Ensure the equipment chassis of protected areas with the protection of ground to maintain
