1
NetSure 2100 A31-S2/S3 Subrack Power
System User Manual
1 Technical Parameters
See Table 1-1 for the technical data of NetSure 2100 A31-S2/S3 subrack power system
(power system for short).
Table 1-1 Technical data
Parameter
category
Parameter
Description
AC input
System Input
TN or TT, single-phase (L+N+PE)
Rated input voltage
220Vac
Input voltage range
85Vac ~ 300Vac (output derating below
176Vac)
Input frequency range
45Hz ~ 65Hz
Rated input frequency
50Hz
Maximum input current
18.4A
DC output
Default output DC voltage
-53.5Vdc
Standard
configuration
output current
0 ~ 52A
Mechanical
Dimension(W × D × H)
43.6mm × 482mm × 240mm
Subrack
power
system
weight(kg)
≤ 4kg (excluding rectifiers)
Rectifier weight (kg)
≤ 0.6kg
Environmental
Operating temperature
-5°C ~ +45°C, 45°C ~ 65°C derating
output
Relative humidity
≤ 90%RH (30°C)
Altitude
≤3000m (derating is necessary above
2000m, the max. working temperature
is lowered by 1°C for every 200m
increase in altitude)
Over-voltage/pollution
degree
Over-voltage: II; Pollution degree: 2
2 Installation
2.1 Safety Regulations
1. Only the adequately trained personnel with satisfactory knowledge of the power system
can carry out the installation and maintenance.
2. Prevent fire disaster and personnel injury.
3. Provide AC power supply that meets the requirement to equipment.
4. Make sure the equipment is well grounding.
5. Keep the equipment clean and dry.
6. Avoid of touching the bare parts of the circuit.
7. In case of suspicious failure, only can carry out 'Off' operation, shall not carry out 'On'
operation.
8. It is strictly forbidden to stand or place objects on the equipment body and accessories.
2.2 Preparation
Unpacking inspection
To inspect the equipment, you should open the packing case, take out the packing list and
check against the packing list that the equipment is correct and complete. Make sure that
the equipment is delivered intact.
Note
The rectifiers were installed in the subrack power system before delivery. If there are
rectifiers configured in the order, the rectifiers will be installed in the subrack power
system before delivery; if there is no rectifier configured in the order, then the subrack
power system will not be installed with rectifier at factory. Customers need to install the
rectifiers by themselves.
Preparing cables
The AC cable CSA should take into account the requirements like temperature rise, voltage
drop, mechanical strength and the cable design should meet relevant industry standards.
With cable length shorter than 30m, the CSA calculation should be based on the current
density of 2.5A/mm
2
. The suggested CSA value is not more than 10mm
2
.
Select the DC load cable CSA according to the Table 2-1.
Table 2-1 DC load cable CSA selection
Load route rated
current
Max. output
current
Min. cable CSA
Max cable length ( volt drop:
0.5V with min. CSA)
50A
50A
6mm
2
3.5m
30A
24A
4mm
2
4.8m
10A
8A
1.5mm
2
5.5m
3A
2.4A
1.5mm
2
18.2m
Note: The specs are applicable at ambient temperature of 40°C. If the temperature is
higher than this, the CSA of the cable should be increased. The maximal cable CSA should
not larger than 10mm
2
The CSA of DC cable depends on the current flowing through the cable, the allowable
voltage drop and the load peak capacity. The recommended load peak capacity is 1/2 to
2/3 of the MCB/fuse capacity.
The CSA of grounding cable should not less than 2.5mm
2
, and yellow-green double color
cable is recommended.
Determining subrack configuration
NetSure 2100 A31-S2/S3 subrack can be accommodated with 1 ~ 3 rectifies, the actual
configured rectifies are based on the order requirement. If the rectifier number is one, you
need to select two dummy plate. If the rectifier number is two, you need to select one
dummy plate. If the rectifier number is three, there is no need to select a dummy plate.
The appearance of the rectifier is shown in Figure 2-1, the layout of the subrack panel is
shown in Figure 2-2.
Figure 2-1 Appearance of the dummy plate
Rectifier 1
Rectifier 2
Dummy plate 21505957
Figure 2-2 Layout of subrack panel
2.3 Installing Power System
The power system can be installed in 19 inch rack.
If rack mounting installation is used, firstly remove the two brackets, turn the bracket with
the grounding screw to make the grounding screw facing forward, and then fasten the
bracket to the front of the subrack left side wall, meanwhile, fix the other bracket after
rotation to the front of the subrack right side wall. The position of the bracket is shown in
Figure 2-3. Use the fixing screws to fasten the subrack power system to the rack through
brackets. Strictly follow the direction shown in Figure 2-4 when installing the subrack
power system. When carrying or installing the power system, it is prohibited to bottom up
or turn over the power system.
31.8
43.6
10.3
6.8
465
Figure 2-3 Installation dimension of subrack and brackets
Correct installing and carrying direction:
Figure 2-
4 19’’ rack installation
Wrong installing and carrying direction:
