16
- 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 PQC. 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 termi-
nals, 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.
The risk to life and limb can be significantly reduced by observing the above
safety precautions.
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]
.
If any incorrect cables, voltages or signals are applied to the terminals, this can
result in damage to the PQC and the electrical installation.
DANGER!
To avoid accidents, the following must be observed:
At the PQC installation site (e.g. control cabinet, enclosure), all wires and stran-
ded cables must be adequately secured or grouped in harnesses to ensure that
no conductor can work free and touch one or more of the instrument retaining
screws so as to make them live and a source of danger.
If the above safety precautions are taken, the risk of damaging equipment and
assets or endangering life and limb can be significantly reduced.
NOTE!
If flexible stranded cables used for the connections, insulated ‘short’ ferrules
6 mm in length must be crimped onto their ends.