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Gossen Metrawatt METRAport 40S Manual

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14 GMC-I Messtechnik GmbH
Notes Concerning Current Measurement:
• The instrument may only be
used in power installations if
the electrical circuit is pro-
tected with a fuse or a circuit
breaker with a rating of up to
20 A, and if nominal voltage at
the system does not exceed
240 V~ (AC) or 50 V (DC).
• Set up the measuring circuit
in a mechanically secure
fashion such that it cannot
be inadvertently interrupted.
Use conductors with an
adequate cross section and
connectors of adequate
size in order to prevent
excessive warming.
• In the A measuring ranges, an intermittent acoustic signal generates a warn-
ing if the measured value exceeds 10 A.
• All measuring ranges up to 10 A are protected by a resetable, 15 A/
240 V AC/50 V DC auto-fuse. In order to conform to the CAT requirements,
an additional slow-blowing fuse link (T16A/500V) has been fitted in series
with the miniature circuit breaker which can only be replaced by service per-
sonnel once it is tripped.
• If a fuse or circuit breaker in the active current measuring range is tripped,
FUSE appears at the digital display, and an acoustic signal is generated
simultaneously.
• Eliminate the cause of overload after the fuse or breaker is tripped before
placing the instrument back into service!
Attention!
!
If the secondary side of the current transformer with voltage output
remains open during operation, e.g. if cables are defective or have not
been connected, or due to a blown device fuse or incorrect
connection, dangerous voltages may occur at the terminals.
Note!
Motors with high starting current cause tripping of the circuit breaker,
except for measurement with clamp meters.
… 14 …


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