31 Installation and start-up Page 134 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
31.3 Installation comment
31.3.1 Fuse protection
Attention!
In the application of meters in the low voltage level the voltage path is direct connected to the
phases. Thereby the only security against a short circuit is the primary fuses of some 120A.
In that case the whole current is running inside the meter or the connection between phase -
phase or phase – neutral, which can cause a lightening or a damage against persons or
buildings.
The recommendation for CT connected meters in the low voltage level is the usage of fuses in
the voltage path with a maximum of 10A.
Figure 24: Connection of a CT meter in the low voltage level
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