Electrical Connections; Checking The Contact Surfaces - Siemens NXAIR Installation Instructions Manual

10 Electrical connections

10.1 Checking the contact surfaces

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INFORMATION
Read and understand these instructions before attempting installation works.
DANGER
Electric shock
Always verify safe isolation from supply without any doubt.
In the instructions given in the following sections it is assumed that new switchgear
is being installed, which has not yet been energized with operational high voltage.
Before performing any kind of checks or work in the connection compartment
of any panel, verify safe isolation from supply without any doubt.
Observe the Five Safety Rules.
INFORMATION
Easier installation
Perform work operations in the connection compartment of a panel through the
switching-device compartment only if access is not possible through the rear side
of the panel.
NOTICE
Insufficient contact
Insufficient electrical contact increases the contact resistance.
Clean oxidized contact points, and grease them.
Mount cable lug of cable sealing end tight and free from distortions and
gaps.
Remove the connecting elements (1) for connection of the cable lugs from the
connection bars (2), and store the connecting elements.
Check contact surfaces of all connection points of cable sealing ends, brush if
necessary, and apply a thin film of Vaseline; then mount the connecting elements
again.
NXAIR /
Electrical connections
≤
40 kA 149