What is LV panel in electrical?
Low voltage panel is a component of an electrical distribution system that divides an electrical power feed into branch circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure.

Preventive maintenance

Preventive maintenance of switchboards is typically carried out as a part of a routine shut down in process industry plants. Periodically the following checks are

 Visual check of the switchgear

 Check of busbar connection

 Check of cable connection terminals

 Cleaning of the modules

 Check of the electrical components

 Check of the contact system

 Electrical function test

 Insulation test of the switchgear


Periodic maintenance

For each type of product, maintenance recommendations have to be formalized in a dedicated document by the technical department. These verification procedures, intended to maintain systems or their subassemblies in correct operating condition over the targeted service life.

Conditional maintenance

To a certain extent, conditional-maintenance operations are a means to reduce (but not eliminate) the recommended periodic-maintenance operations (thus limited to the strict minimum) that require an annual shutdown of the installation.

These operations are launched when programmed alarms indicate that a predefined threshold has been reached. (Number of operation > durability, aging indicators…)

Electronic trip units in power circuit breaker can propose such functions. Conditional maintenance is the means to optimise installation maintenance.

Recommended periodic maintenance operations, for normal operating conditions


1 yearVisual inspection and functional testing, replacement of faulty accessories
2 years+ servicing operation and subassembly tests
5 years+ diagnostics and repairs (by manufacturer)


The intervals stated are for normal environmental and operating conditions.

Provided all the environmental conditions are more favourable, maintenance intervals can be longer.

If just one of the conditions is more severe, maintenance must be carried out more frequently.

Functions linked specifically to safety require particular intervals. For example, emergency switching and earth leakage protection


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