8
2 Safety
This instrument was manufactured and tested in compliance with IEC 61010 class 2 standards for operating
voltages up to 250 VAC rms phase to neutral.
In order to maintain this condition and to ensure safe operation, the user must comply with the indications
and markings contained in the following instructions:
•
When the instrument is received, before starting its installation, check that it is intact and no damage
occurred during transport.
•
Before mounting, ensure that the instrument operating voltages and the mains voltage are
compatible then proceed with the installation.
•
The instrument power supply needs no earth connection.
•
The instrument is not equipped with a power supply fuse; a suitable external protection fuse must be
foreseen by the contractor.
•
Maintenance and/or repair must be carried out only by qualified, authorized personnel
•
If there is ever the suspicion that safe operation is no longer possible, the instrument must be taken
out of service and precautions taken against its accidental use.
•
Operation is no longer safe when:
1) There is clearly visible damage.
2) The instrument no longer functions.
3) After lengthy storage in unfavorable conditions.
4) After serious damage occurred during transport
The instruments must be installed in respect of all the local regulations.
2.1 Operator
safety
Warning:
Failure to observe
the following instructions may lead to a serious danger of death.
-
During normal operation dangerous voltages can occur on instrument terminals and on
voltage and current transformers. Energized voltage and current transformers may generate
lethal voltages. Follow carefully the standard safety precautions while carrying out any
installation or service operation.
-
The terminals of the instrument
must
not be accessible by the user after the installation. The
user should only be allowed to access the instrument front panel where the display is
located.
-
Do not use the digital outputs for protection functions nor for power limitation functions. The
instrument is suitable only for secondary protection functions.
-
The instrument must be protected by a breaking device capable of interrupting both the
power supply and the measurement terminals. It must be easily reachable by the operator
and well identified as instrument cut-off device.
-
The instrument and its connections must be carefully protected against short-circuit.
Precautions:
Failure to respect the following instructions may irreversibly damage to the instrument.
-
The instrument is equipped with PTC current limiting device but a suitable external protection
fuse should be foreseen by the contractor.
-
The outputs and the options operate at low voltage level; they cannot be powered by any
unspecified external voltage.
-
The application of currents not compatible with the current inputs levels will damage to the
instrument.
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