Mounting The Spherical Connection Bolts - Siemens 8DJH Installation And Operating Instructions Manual

7 | Installation

7.20.7 Mounting the spherical connection bolts

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Mounting the cable-cable type:
1. Mount the high-voltage cables at the current transformer connections.
Fig. 115: Connection to upper current
transformer terminal
Fig. 117: Minimum distance
To earth the busbars or the high-voltage cables when the current transformers are removed,
spherical connection bolts must be mounted on the connection bars. The spherical connection
bolts are available as accessories.
Falling below the minimum distance of spherical connection bolts
Too small minimum distances between spherical connection bolts and earthed parts can
cause an internal arc during operation.
⇨ Minimum distances according to IEC 61936 / VDE 0101 must be observed and checked
during the installation.
⇨ Minimum distance for 12 kV: ≥ 120 mm
⇨ Minimum distance for 24 kV: ≥ 220 mm
8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
Fig. 116: Connection to lower current
transformer terminal
Hexagon nut M12
1
High-voltage cable
2
Conical spring washer M12
3
Connection bar of current transformer
4
Hexagon head bolt M12x40
5
NOTICE