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R250D
Hardware Installation and Maintenance Guide
The meaning of the label in
l
l
PGND and BGND are two copper bars, on which the terminal blocks are short-circuited.
Therefore, it makes no difference which terminal is connected to them. It is only necessary to
give the row and column of the power distribution box, instead of giving the specific serial
number of the terminal block on the copper bar. For example, if the label on the loaded
cabinet side is "A01-BGND", it means that the power cable is a BGND that connects BGND
copper bar in the power distribution box in row A, column 01 in the machine room.
Information on the labels for PGND cables should be given in a similar way.
Engineering Labels for AC Power Cables
These labels are affixed to both ends of an AC power cable that provides AC power supply to
cabinets, including 110/220 V, PGND, and BGND cables. The 110/220 V AC cables and
related PGND and BGND cables are covered with an insulating sheath, so the labels need to
contain only the word "AC" and the cabinet numbers.
The labels for AC power cables are affixed to one side of the identification plates on cable
ties. For details, see
Table 5-27 Label content
Content
MN-(B)-ACn
The label only carries location information about the opposite equipment and the power
socket; information about the local end is unnecessary.
Issue 01 (2016-09-30)
On the loaded cabinet side, the label "A01/B08--48V2" on the cable indicates that the
cable is -48 V DC supply, which is from the eighth connector in row B of -48 V bus bar
in the cabinet in row A, and column 1 in the equipment room.
On the distribution box side, the label "B03--48V2" indicates that the cable is -48 V DC
supply, connected to DC power socket 2 in row B, column 03 in the equipment room.
NOTE
In the power distribution box or the first power cabinet of a row in a transmission equipment room,
every terminal block on the -48 V connector bar has a numeric identification. For example, in the above
label of "A01/B08--48V2", "08" (or sometimes "8") is the numeric identification of the terminal block.
Table
Meaning
MN: serial number of the cabinet or the socket where the power is led
in
B: chassis number, numbered in bottom-up order with two digits, for
example, 01.
n: power port number, numbered as 1 to 3 in bottom-up and left-to-right
order.
Serial number of the socket where the power is led in: the location of
the socket is marked according to the actual situation. If the sockets can
be identified by row numbers and column numbers, they can be
numbered following the same rule for the cabinets. If the sockets
cannot be identified by rows and columns, specify the detailed
locations to avoid confusion with other sockets.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Figure 5-93
is as follows:
5-27.
5 Appendix
93
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