42 Advance Optima Ex Analyzer Modules Operator’s Manual 42/24-12-2 EN
Electrical Equipment in Explosion Hazard Zones:
Maintenance and Repair Instructions
Monitoring and
Inspection
The condition of electrical systems in explosion risk areas must be monitored. As
necessary, and at least ever three years the system shall be inspected by a
qualified electrician if it is not under continuous monitoring by a responsible
engineer.
Work on Electrical
Systems
The power supply must be disconnected before performing any work on electrical
systems in explosion risk areas. The breaker is to be fitted with an appropriate
label, e.g. "Do Not Turn On - Risk of Explosion".
This does not apply to devices that are opened during operation, e.g. cleaning
apparatus, or to devices which have been expressly type certified for such
operation.
Work on Intrinsically
Safe Circuits
Work may be performed on intrinsically safe circuits in explosion risk areas even
while power is connected.
However, the electrical characteristics (inductance, capacitance, current and
voltage) of test equipment should be noted when such equipment is activated.
Special attention is required if work is carried out on intrinsically safe circuits set
up in conjunction with Zone 0 areas.
Explosion Risk The explosion risk should be eliminated prior to carrying out any repair work.
Personnel
Qualifications
Repair work should only be performed by qualified personnel.
Original Parts Only original parts should be used for repairs.
Testing Prior to
Returning to Service
If repairs are made on components in an electrical device necessary for explosion
protection, prior to any return to service a qualified person shall inspect this device
and certify that its explosion protection features are in compliance with the type
and design requirements as stated in the device’s certification documentation.
Manufacturer’s
Repairs
Repairs can also be carried out by the manufacturer, e.g. on site by an ABB
Service employee or at the manufacturer’s facility.
In this case the repair carried out and the subsequent inspection will be shown on
the device identification plate. An inspection by an expert is not required in such a
case.
To Next Page
Loading...
