hager KEH31D00S3LMA, System Manual

Page: 83 / 92

Installation, handling and maintenance
Technical changes reserved 83
Recommended intervals for recurring checks / visual inspection
Recurring checks do not require the unibar H busbar trunking system to be
switched off.
In the interest of ensuring a high level of operational safety, the busbar trunking
system should be checked every 4 years by an electrically skilled person with
testing experience and verified that it is in perfect working order
(recommendation by German Social Accident Insurance regulation 3 (DGUV)
(formerly BGV A3)). National or insurer regulations may extend or shorten the test
interval.
The recommended checks include an exterior visual inspection:
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Condition of the supporting system, hangers and fastenings,
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Busbar trunking system for completeness (flanges and their bolted
connections, covers, closed caps on tap-off units),
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Mechanical condition, paint damage, damage to tap-off units,
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Signs of corrosion,
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Legibility of name plates, clean if necessary,
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Check of ambient conditions (room temperature, relative humidity, aggressive
air constituents, dust).
7.4.2 Enlargement
Modifications and enlargements with unibar H components are possible at any
time after the installation of the busbar trunking system.
Planning an enlargement of the installation or the replacement of
components
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Prior to replacing electrical equipment with other types of devices and also
prior to expanding the system, a new project must be planned and the
busbar trunking system must be tested according to EN 61439.
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When expanding or modifying an existing system, it must be verified and
confirmed that the safety of the existing system is not adversely affected.
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After enlargements, modifications, retrofitting and repairs, an initial test of the
busbar trunking system must be performed.
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If the replacement of the equipment involves changes that are not included in
the design verifications of the original manufacturer Hager, a design
verification must be created. A routine verification is not sufficient in this
case. Use only type-tested components from Hager. In this way you will
avoid the need to create a type verification.