Installation Requirements; Troubleshooting - ABB B21 Installationsanleitung

The best way to make a safe installation is to install the unit in
an enclosure. Further, access to the equipment should be lim-
ited through use of lock and key, controlled by qualified electri-
cal personnel.
W
Warning – The meters must always be protected by fuses on
the incoming side.
Do not operate the equipment outside the specified technical
data.

Installation Requirements

To comply with the protection requirements the meter must be
mounted in protection class IP 51 enclosures, or better, according to
IEC 60259.
Meters with wireless communication should not be installed closer
than 20 cm from people.

Troubleshooting

If any of the following icons
installation has been completed and power has been connected to the
meter, refer to the B21 User Manual for detailed information.
W VC
appear in the display after the
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