Checking The Connections - Landis+Gyr E350 Series User Manual

Installation/Uninstallation
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4.3

Checking the Connections

D000027979 en t – E350 Series 2, 3-Phase ZxF100Ax/Cx – User Manual
With small conductor cross-sections (e.g. 4 mm
be placed in the indentation (stamping) of the current loops so that it cannot
shift sideways when tightening the terminal screws. Ensure that the
connecting line remains in the indentation when tightening.
Indentation (stamping) for smaller connection lines
Current loop conductors
Fig. 4.4 Cross-section through current loop conductor
Insufficiently tightened screws
Insufficiently tightened screws of the connections can lead to increased
power losses at the terminals and therefore to undesirable heating. A
contact resistance of 1 m causes a power loss of 6.4 W at 80 A!
Insulate to correct length
Touching live parts is dangerous to life. Shorten the stripped part of the
connecting wire, if bare wire is visible above the terminal edge.
Do not withdraw connecting wires with closed terminals
Never withdraw connecting wires with the terminal closed, since this could
damage the terminal.
Before putting the meter into operation check (and correct, if necessary) the
following points to ensure a correct connection:
1. Has the correct meter (identification number) been installed at the
measuring point of the relevant consumer?
2. Is the calibration connection closed (sealable sliding piece inserted
and sealed)?
3. Are all screws for the phase and neutral connections tightened well?
4. Are all inputs and outputs connected correctly? The house connection
or consumer fuse wires must be present at the input (terminals 1, 4, 7),
those of the meter to the consumer at the output (terminals 3, 6, 9).
5. Is the neutral conductor connected to terminals 10 and 12 (not
applicable to Aron connected ZFF meters)? Interchanging of a phase
with the neutral could destroy the meter.
Mount the terminal cover after a successful check of the connections,
tighten its screws and seal it.
2
), the connecting line must
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