7 | Installation
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8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
4. Bolt the connection bar and the spacer together with the cheese head bolt at the vessel
bushing of the busbar (tightening torque: 40 Nm).
5. Put the control cap
3
on the retaining clip.
6. Verify firm seat of control cap.
7. Perform the installation for the other two phases in the same way.
Fig. 109:
Interconnecting the connection
bar
1
Vessel bushing
2
Connection bar
3
Control cap
4
Retaining clip
5
Hexagon socket head cap bolt M10
6
Conical spring washer
7
Spacer
7.20.5 Connecting the voltage transformers
NOTICE
Falling below minimum distances
Too small distances between the connecting cables of the instrument transformer can cause
an internal arc during operation.
⇨ Cut to length the connecting cables between the current and voltage transformers such
that the required minimum distances to live parts are observed.
⇨ The deflection of the connecting cables between the current and voltage transformers
may not be more than 10 mm in any direction.
NOTICE
Falling below the minimum distances of flexible steel tubes
If flexible steel tubes are used in the cable compartment for wire routing, an insufficient
distance to live parts can cause an internal arc.
⇨ Lay the flexible steel tube while maintaining a sufficient minimum distance from live
parts.
In metering panels type busbar-busbar, busbar-cable and cable-busbar, the voltage transformers
are pre-assembled in the metering panels
below
the current transformers at the factory. In the
metering panel type cable-cable, the voltage transformers are pre-assembled in the metering
panels
above
the current transformers at the factory.
The voltage transformers must be connected to the current transformers with the connecting
cables which are either pre-assembled or supplied with the supplementary equipment.
Depending on the circuit diagrams, the voltage transformers can be connected either at the
lower or upper terminals of the current transformers.
Summary of Contents for 8DJH
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