Working On Hv Cabinets And Mandatory Safety Procedures; Warning Texts And Symbols - ABB OVR-15 Instruction, Operation And Maintenance Manual

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1.5. Working on HV cabinets and mandatory
safety procedures
When work on HV and/or LV units is required,
observe the following mandatory minimum
procedures:
a. Isolate the recloser from the power system
on both sides. Put recloser in OPEN condition
by operating the yellow emergency manual
trip handle. Once the recloser is opened, the
handle locks and blocks close operation both
electrically and mechanically until the handle
is reset to its original (not operated) position.
b. Confirm the OPEN status of the recloser from
the mechanical ON/OFF indicator and from
the indication LEDs on the SEL-751.
c. Switch off all MCBs on LV unit's swinging door.
d. Follow the safety warning instructions on
various warning labels provided on the LV
and HV units.
e. Remove the control cable from both the HV
and LV cabinets, and cover the 24-pin male
connectors with the plastic caps provided.
Although hazard warnings relate to personal injury,
it is also important to understand that under
certain operational conditions, operation of
damaged equipment may result in degraded
process performance, potentially leading to
personal injury or death. Therefore, comply fully
with all warning and caution notices.

1.5. Warning texts and symbols

Warning texts and symbols are based on different
degrees of urgency, which must be observed
carefully. These are described below.
Danger indicates a hazardous situation which,
if not avoided, will result in death or serious
injury.
Warning indicates a hazardous situation which,
if not avoided, could result in death or serious
injury.
Caution indicates a hazardous situation which,
if not avoided, could result in minor or
moderate injury.
Notice is used when there is a danger that can
lead to equipment damage only.
IMPORTANT
Important indicates an operation
or a suggestion for handling.
Warning symbols
The following warning symbols may appear
on warning labels on the product itself.
The electrical warning icon indicates
the presence of a hazard that could
result in electrical shock.
Dangerous voltages can occur on the
connectors even though the auxiliary
voltage has been disconnected.
Only a competent electrician must
be allowed to carry out the electrical
installation.
National and local electrical safety
regulations must always be followed.
Non-observance can result in death,
personal injury or substantial property
damage.
The warning icon indicates the presence
of a hazard that could result in personal
injury.
The equipment contains components
that are sensitive to electrostatic
discharge. Unnecessary touching of
these electronic components must,
therefore, be avoided.