Safety Regulations; Radio Interference - Landis+Gyr E650 Series 4 User Manual

Safety
1.3

Safety regulations

1.4

Radio interference

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D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
The following safety regulations must be observed at all times:

The meter connections must be disconnected from all voltage sources
during installation or when opening.

Contact with live parts can be fatal. The relevant supply fuses should,
therefore, be removed and kept in a safe place until the work is
completed so that other persons cannot replace them unnoticed.

Local safety regulations must be observed. Only technically qualified
and appropriately trained personnel are authorised to install the meters.

Only appropriate tools shall be used for the job. This means, e.g. that
the screwdriver must be of the correct size for the screws, and the
handle of the screwdriver must be insulated.

Secondary circuits of current transformers must be short-circuited (at
the test terminal block) without fail before opening. The high voltage
produced by an interrupted current transformer circuit is dangerous to
life and destroys the transformer.

Transformers in medium or high voltage systems must be earthed on
one side or at the neutral point on the secondary side. Otherwise they
can be statically charged to a voltage which exceeds the insulation
strength of the meter and is also dangerous to life.

The meters must be held securely during installation. They can cause
injuries if dropped.

Meters that have been dropped must not be installed, even if no
damage is apparent, but must be returned to the service and repair
department (or the manufacturer) for testing. Internal damage may
result in malfunctions or short-circuits.

The meters must never be cleaned under running water or with
compressed air. Water ingress can cause short-circuits.
Possible radio interference in residential environments
This meter is normally a class B product. In combination with some
communication modules it can become a class A product. In a domestic
environment, this may then cause radio interference, in which case the user
may be required to take adequate measures.
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