Installation
Operating Manual EM-PQ 2300
13
DANGER!
The following instructions must be observed to avoid danger to life and limb:
When the instrument is being installed or serviced, the instrument and the electrical
system must be isolated from the power supply.
The isolated electrical system must be locked out to prevent its being inadvertently
switched on again.
It must be verified that none of the instrument connections are live!
The power supply and voltage measurement connections are live and must not be
touched!
The measurement terminals L1, L2, L3, N and PE, plus the instrument power supply
terminals L and N and both alarm contacts must be short-circuited during any work
carried out on the instrument.
All live components in the vicinity must be covered to prevent inadvertent contact.
If the power supply voltage and the voltage measured exceed the values specified in this
operating manual and stated on the EM-PQ 2300, this may cause damage to the
instrument. Consequential damage to other parts of the installation is also possible.
The instrument power supply circuit and the voltage measurement connections must all
be protected externally by 2 A slow-blow 250 V AC fuses.
Only the specified and appropriate voltages and signals may be connected to the
respective terminals and ports provided for them.
The cross-sectional areas of all cables used must be adequate for the purpose.
Suitable measures must be taken to prevent cables operating at the power supply
voltage being inadvertently pulled out and twisted.
A disconnecting device, such as an isolator or circuit breaker, must be fitted in the
building electrical installation in a suitable location, accessible by the user and
appropriately labelled as a disconnecting device for the EM-PQ 2300. It must be able to
isolate all cables operating at the power supply voltage from the instrument.
If flexible stranded cables with their total cross-sectional area assembled from several
fine filaments are used for the connections, ferrules must be crimped onto their ends. It
must be ensured that no individual filament has been left out of the ferrule.
When work is carried out on the connecting cables and the instrument terminals, it is possible that
live components may be touched inadvertently. If this occurs, the voltage present may be injurious
to health or may even have fatal consequences.
Observing the above safety precautions can significantly reduce the risk to life and limb.
NOTE!
The instrument can be damaged by incorrect operation.
Only the specified and appropriate voltages and signals may be connected to the
respective terminals and ports provided for them.
The cross-sectional areas of all cables used must be adequate for the purpose.
The required cable types are specified in
Section 2, Technical data, page 8.
If any incorrect cables, voltages or signals are applied to the terminals, this can result in damage
to the EM-PQ 2300 and the electrical installation.
