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IEC 62610-6-2020 pdf free download
IEC 62610-6-2020 pdf free download.Mechanical structures for electrical and electronic equipment — Thermal management for cabinets in accordance with IEC 60297 and IEC 60917 series — Part 6: Air recirculation and bypass of indoor cabinets.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
recirculation flow rate
flow rate of the air that returns directly from the exhaust of the equipment to be cooled to the intake side of the equipment
bypass flow rate
flow rate of the air going through a cabinet without going through any of the equipment to be cooled
recirculation ratio of a subrack
ratio of the recirculation flow rate of a subrack or a chassis-based equipment to the flow rate of the equipment
recirculation ratio of a cabinet
ratio of the total recirculation flow rate of all of the subracks mounted in a cabinet to the total flow rate of all of the subracks mounted in a cabinet
bypass ratio of a cabinet
ratio of the bypass flow rate of a cabinet to the airflow rate of a cabinet
dummy thermal load
simulator that reproduces thermal fluid behaviour such as heat dissipation and flow rate generated by subrack and/or chassis-based equipment
Note 1 to entry: Generally, a heater and a fan mounted in a chassis are used, and the amount of heat dissipation and the fan flow rate can be adjusted.
4 Recirculation level
The recirculation level RL indicates the degree of recirculation of a subrack or a chassis or a
cabinet and is represented by levels RL1 through RL4 according to the recirculation ratio of a
subrack RCç or recirculation ratio of a cabinet RC,. See Table 1.IEC 62610-6-2020 pdf free download.
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