Vertiv NetSure 731 A91, User Manual

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Chapter 2 Installation Instruction 3
NetSure 731 A91 Subrack Power System User Manual
Chapter 2 Installation Instruction
2.1 Safety Regulation
Certain components in this power system carry hazardous voltage and current. Always following the instructions
below
：
1. Only the adequately trained personnel with satisfactory knowledge of the power system can carry out the
installation. The most recent revision of these safety rules and local safety rules in force shall be adhered to during
the installation.
2. All external circuits that are below 48V and connected to the power system must comply with the requirements of
SELV as defined in IEC 60950-1.
3. Make sure that the power (mains and battery) to the system is cut off before any operations can be carried out
within the system cabinet.
4. The power cabinets shall be kept locked and placed in a locked room. The key keeper should be the one
responsible for the power system.
5. The wiring of the power distribution cables should be arranged carefully so that the cables are kept away from the
maintenance personnel.
2.2 Preparation
Unpacking inspection
The equipment should be unpacked and inspected after it arrives at the installation site. The inspection shall be done
by representatives of both the user and Vertiv Tech Co., Ltd.
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.
Cables
The cable should be selected in accordance with relevant industry standards.
It is recommended to use the RVVZ cables as AC cables. The cable should reach at least +70°C temperature
durability. With cable length shorter than 30 meters, the Cross-Sectional Area (CSA) calculation should be based on
the current density of 3.5A/mm2. The suggested CSA value is no less than the Table 2-1.
Table 2-1 AC cable CSA selection
AC MCB rated current Max. AC input current Min cable CSA Max cable CSA
100A 64A 25mm2 50mm2
The CSA of DC cable depends on the current flowing through the cable and the allowable voltage drop. To select the
battery cable CSA, see Table 2-2,select the DC load cable CSA according to the Table 2-3.
Table 2-2 Battery cable CSA selection
Battery MCB rated current Max. battery current Min cable CSA
Max cable length( volt drop:
0.35V with max. CSA)
125A 100A 35mm2 7m
Note:
1. The specs are applicable at ambient temperature of 25°C.
2. The battery cable should reach at least +90°C heat durability. It is recommended to use double-insulated copper-core flame
retardant cable as battery cable.