Inspection and maintenance
106
Technical changes reserved
Important for safe operation
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Regular preventative maintenance is important for the safe operation of
switchgear and controlgear assemblies.
Checks and maintenance only by electrically skilled person with appropriate
testing experience
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Tests and maintenance must be carried out by electrically skilled persons
who have experience in testing switchgear and controlgear assemblies.
8.1
Testing intervals for recurring tests
In the interest of ensuring a high level of operational safety, the commercial
switchgear and controlgear assembly should be tested at least every 4 years by
an electrically skilled person to check that it is in perfect working order
(recommendation of the German Social Accident Insurance regulation 3 (DGUV)
(formerly BGV A3)). National or insurer regulations may extend or shorten the test
interval. Shortened intervals may be defined to ensure proper functionality and
safe operation due to:
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the demands on the operating equipment,
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external influences,
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changes to the operating parameters and ambient conditions,
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special kinds of compartments and systems according to DIN VDE 100 group
700,
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in the event of complicated operating conditions, special circumstances,
such as shocks and exposure to moisture,
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the specifications of the device or operating equipment manufacturer set
forth in their instructions,
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according to applicable national standards and regulations.
Hager recommends performing a test at least once a year:
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a visual inspection (external inspection),
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switching operations of individual protective devices and switching devices
(operation of RCD test buttons every six months),
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document all tests, for example, in an inspection book.
Recommended recurring tests
System / operating
equipment
Test interval Type of test
Inspector
Electrical systems and
stationary operating
equipment
4 years
For perfect working order
Electrically skilled
person
(with testing
experience)
Electrical systems and
stationary operating
equipment in operating
sites, special kinds of
spaces and systems
according to DIN VDE
100 group 700
1 year
For perfect working order
Electrically skilled
person
(with testing
experience)
8
Inspection and maintenance