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Checks to electrical devices
EN
Repair and maintenance to electrical components shall include initial safety
checks and component inspection procedures. If a fault exists that could
compromise safety, then no electrical supply shall be connected to the
circuit until it is satisfactorily dealt with. If the fault cannot be corrected
immediately but it is necessary to continue operation, an adequate
temporary solution shall be used. This shall be reported to the owner of the
equipment so all parties are advised.
Initial safety checks shall include:
-that capacitors are discharged: this shall be done in a safe manner to avoid
possibility of sparking;
-that there no live electrical components and wiring are exposed while
charging, recovering or purging the system;
- that there is continuity of earth bonding.
Repairs to sealed components
During repairs to sealed components, all electrical supplies shall be
disconnected from the equipment being worked upon prior to any removal
of sealed covers, etc. If it is absolutely necessary to have an electrical supply
to equipment during servicing, then a permanently operating form of leak
detection shall be located at the most critical point to warn of a potentially
hazardous situation.
Particular attention shall be paid to the following to ensure that by working
on electrical components, the casing is not altered in such a way that the
level of protection is affected. This shall include damage to cables, excessive
number of connections, terminals not made to original specification,
damage to seals, incorrect fitting of glands, etc.
Ensure that apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded such that they no
longer serve the purpose of preventing the ingress of flammable
atmospheres. Replacement parts shall be in accordance with the
manufacturer's specifications,
NOTE The use of silicon sealant may inhibit the effectiveness of some types
of leak detection equipment. Intrinsically safe components do not have to
be isolated prior to working on them.
Repair to intrinsically safe components
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