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8040606300
S-BA-8040-en-02-15/06/2007
Repairs and Maintenance
9 Control and signal station
8040
10 Repairs and Maintenance
Repairs and maintenance work on the control stations may only be carried out by appro-
priately authorized and trained personnel.
For the purpose of maintenance work, the length of time between periodic checks shall
be so set that any system faults likely to arise are found promptly. The maximum interval
between checks is three years.
Note the following when establishing the interval between checks:
X
the ambient conditions (installed in the open, wind, rain, sunlight, etc)
X
the operating conditions (utilisation of system, operator errors)
X
manufacturers’ instructions in technical documentation (mechanical and electrical life
of switchgear)
X
big changes in the whole system (e.g. change of zone allocation)
The following points must be checked during maintenance:
X
clamping screws holding the cables are securely seated
X
compliance with permitted temperatures (to EN 60079-0)
X
cracks in plastic enclosures
X
damage to the gaskets
WARNING
Do not open enclosure when supply is switched on!
Do not open when intrinsically safe circuits are energised!
Exception:
Enclosures with intrinsically safe and non-intrinsically safe circuits with the notice
„Non-intrinsically safe circuits protected by IP 30 cover“ may be opened when supplied
with power.
WARNING
Observe the relevant national regulations in the country of use!
)
If a flameproof device is damaged, absolutely no repair or maintenance work
is allowed. Please replace the device.
WARNING
Checks should be by sight, adjacent or detailed, depending on local conditions. If faults
are found during these checks which affect the explosion protection, then the system
must be taken out of service until the faults have been cleared.