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NE40E-M2 V800R010C10SPC500 Installation Guide

This is NE40E-M2 V800R010C10SPC500 Installation Guide
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Labels for DC Power Cables

Labels for DC Power Cables

DC power cable labels are attached to DC power cables that feed power to cabinets, including the -48 V, PGND, and BGND cables. DC power cables refer to both the power cables themselves and also the protection ground cables.

A label for DC power cables is attached to one side of an identification plate with a cable tie. Table 6-8 provides information on a label for a DC power cable.
Table 6-8 Information on a label for a DC power cable

Content

Description

MN(BC)-B--48Vn

MN(BC): BC is written right under MN.

B is a two-digit number that identifies the chassis number, for example, 01. Chassis are numbered from bottom to top.

n identifies the power socket number. Power sockets are numbered 1 to 3 from bottom to top and from left to right.

On the loaded cabinet side, MN identifies the row and column number of the power distribution facilities, such as the power control cabinet and power distribution box. BC identifies the row and column number of the -48 V connector. BC can be omitted if there is no row or column number, or if the connector can be identified without them. BGND and PGND are not assigned rows or columns for identification.

On the power distribution cabinet side, only MN is used to identify the cabinet.

MN(BC)-B-BGND

MN(BC)-B-PGND

The label carries location information only about the destination of the power cable while information of the local end is unnecessary. That is, the label carries location information only about the opposite device, the control cabinet, or the power distribution box. Table 6-8 provides information of the label when two -48 V power connections are used. Label information is similar when other DC voltages, such as 24 V and 60 V, are used.

Make sure that labels are attached in the correct direction. After the cable ties are tied onto cables, the identification plates with the labels should face upwards, and the text on labels in the same cabinet should be in the same direction. Figure 6-15 shows example labels for a DC power cable.
Figure 6-15 Example labels for a DC power cable

The labels shown in Figure 6-15 contain the following information:
  • On the loaded cabinet side, the label "A01/B08--48V2" indicates that the cable is connected to the eighth connector in row B of the -48 V busbar in the cabinet in row A, column 1.
  • On the power distribution box side, the label "B03--48V2" indicates that the cable is connected to -48 V DC power socket 2 in the loaded cabinet in row B, column 03.
NOTE:

In the power distribution box or power distribution cabinet 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 "8") is the numeric identification of the terminal block.

The terminal blocks are both short-circuited on the PGND and BGND copper bars, so it makes no difference which terminal is connected. 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 to the BGND copper bar in the power distribution box in row A, column 01. Information on the labels for PGND cables should be given in a similar way.

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Updated: 2019-01-02

Document ID: EDOC1100058424

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