Overview Of Dangers - ABB ProKiln GAC400 Operating Instruction

ProKiln GAC400 PROBE GAS SAMPLING SYSTEM | OI/GAC400-EN REV. A

Overview of dangers

Introduction
The probe gas sampling system is designed such that the
operator is protected against all dangers that can be reasonably
avoided by means of design. Due to the purpose of the probe
gas sampling system, however, there are nevertheless residual
risks that require precautions. The following section gives
information about the nature of these residual risks and their
effects.
Moving gas sampling probe
The probe moves in and out automatically. Expect a system-
actuated movement of the gas sampling probe at any time. The
gas sampling probe not only performs individual extension and
retraction movements, but also performs combined processes
involving successive extension and retraction movements.
This means:
• Risk of injury due to automatic extension and retraction
movements of the gas sampling probe if anyone is standing
in the retractor's area of travel.
• Danger of toxic, harmful gases when the shutter is open.
The above risks are valid if working inside the danger area
around the probe, all movement of the probe is stopped if the
safety device that permits access to the danger area is activated.
The safety device could be e.g., a locked gate, fence or barrier
that leads to the probe gas sampling system area.
Associated warning sign in this operating instruction:
WARNING
Gas sampling probe movements
Risk of crushing around the retractor due to gas sampling
probe movements.
• Before commencement any work on the probe gas
sampling system, turn the Safety switch to "Off" and
secure the service switch against unauthorized switching
(with a padlock).
• Additionally press the EMERGENCY-STOP switch before
working on the retractor or probe.
• Do not enter the danger area around the retractor until it
is at standstill and the warning lamps and buzzer are off.
• Never stand in the danger area around the retractor when
the protective installation is closed.
• When the warning lamps light up or the warning buzzer
buzzes, leave the danger area around the probe retractor
immediately as the probe is about to move at any
moment.
• Press the EMERGENCY-STOP switch immediately if anyone
is still in the danger area around the retractor after the
warning lamps light up or the warning buzzer buzzes.
Electrical components
The probe gas sampling system contains electrical and live
components.
This means:
Danger of electrocution,
• if covers on control cabinet, terminal box or power
connection are open. Connectors in the control cabinet or
terminal box may also live parts.
• if the connection between the protective earth connector
and a protective earth conductor is not made before all other
connections.
• if the protective earth conductor is interrupted inside or
outside the probe gas sampling system or the protective
earth connector is disconnected.
• if the set operating voltage and mains voltage do not match
before switching on.
• if work is performed on the open probe gas sampling system
without disconnecting probe gas sampling system from the
power supply.
• due to charged capacitors in the probe gas sampling system
even if probe gas sampling system has been disconnected
from all sources of power.
• due to fuses that do not match the specified type and
nominal current and/or repaired fuses.
Associated warning sign in this operating instruction:
DANGER
Danger to life due to live parts!
• Only specialized electrical personnel may work on the
electrical system.
• Disconnect the probe gas sampling system from the
power supply before working on the electrical
components.
• Observe national regulations pertaining to electrical
equipment.
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