Connecting The Meter; Connecting The Phase And Neutral Connection Wires - Landis+Gyr E470 Series User Manual

Installation and Commissioning
6.3

Connecting the meter

6.3.1

Connecting the phase and neutral connection wires


D000058620 en a – E470 Series 3 SMETS2 100 mm – ZCX310 – User Manual and Functional Description
Issue 1.2
1. Referring to Figure 13, cut and strip the connecting wires to the
required length and then strip them.
Insulate to correct length
The insulation of the connecting line must extend as far as the terminal
indentation, i.e. there must be no further bare part of the connecting line
visible above the terminal edge. The stripped part of the connecting wire
should be shortened if necessary.
Wire
Wire insulation
(ends before
Terminal
terminal)
Figure 13 Terminal connection
2. Insert the phase connecting wires in the relevant terminals (see con-
nection diagram Figure 8) and tighten the terminal screws firmly
(torque max. 3 Nm). Do not overtighten the terminal screws.

For wires with small conductor cross-sections (≤ 6 mm
necting line must be placed carefully in the middle of the terminal,
so that it cannot move sideways when tightening the terminal
screws. When tightening, ensure that the connecting line remains
between the copper inside the terminal and the screws.

It is recommended that the beginning and end of the relevant
conductors are identified using a suitable test unit (e.g. buzzer) to
ensure that the right consumer is connected to the meter output.
Power losses at the terminals
Failure to tighten terminal screws sufficiently can lead to power loss and
heating.
Note
A contact resistance of 1 mΩ causes a power loss of 10 W at 100 A.
Damage to terminals
Never withdraw connecting wires with the terminal closed, as this can
damage the terminal.
Connector screws
Terminal block
43/143
2
) the con-
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