DHG07-48/42 small cell power user manual<A>
11
over-discharge.
1.8.1 Insulation resistance
When the ambient temperature is 15
～
35
℃
and the test voltage is 500V DC, the insulation resistance of
the AC part and the DC part to ground and the AC part to the DC part meet the following requirements: relative
humidity
≤
65%, and the insulation resistance is not less than 5M 65% <relative humidity
≤
90%, insulation
resistance is not less than 2M.
1.8.2 Electrical strength
①
The AC input should be able to withstand a sinusoidal AC voltage of 50Hz and an effective value of
1500V or a 2121V DC voltage equivalent to its peak value for 1 min.
No breakdown or flashover.
②
The AC input and DC output should be able to withstand a sinusoidal AC voltage of 50Hz and an
effective value of 3000V or a peak voltage of 4242V.
1min without breakdown or flashover.
③
The DC output should be able to withstand a sinusoidal AC voltage of 50Hz and an effective value of
500V or a peak value of 707V DC voltage Imin and no
Breakdown or flashover.
④
Grounding performance
The grounding resistance between the chassis and grounding parts is <0.1
Ω
.
1.8.3 System contact earth current
This machine has a large contact current, and it must be grounded before connecting the power.
1.9 Implementation standards
YD/T 1058-2015
《
Communication high-frequency switching power supply system
》
2 Structural characteristics and working principle
2.1 Overall structure
The small cell power system at the end station adopts a compact structure, integrating DC power
distribution, rectifier modules, monitoring modules, power detection units, etc. into one compact, flexible and
easy to install.
Figure 2-1-1 shows the outline diagram of the small cell power system.
