5. OPERATION 67
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5. Operation
Hazard warning
• All activities in connection with
operation of the switchgear require
relevant national regulations regarding
the operation of electrical installations
• Always make sure that switching
operations have been completed before
performing the next switching
operation.
5.1. General notes
The three switching positions of the three
position disconnect, “connecting”, “disconnec-
ting” and “preparing for grounding” are clearly
defined by the mechanical structure of the switch
and can be visually checked by using view ports.
Connecting and disconnecting the operating
current and grounding are performed exclusively
by the circuit-breaker. Typical switching
operations are described in chapter 4.2.
Detailed descriptions of how to operate the
devices can be found in the operating
instructions of the protection and control devices
and in chapters 5.4. and 5.5.
In order to avoid maloperation, the operating
mechanisms of any panel are electrically and
mechanically interlocked.
• The three position disconnect (disconnect and
grounding switch function) can only be
operated when the circuit-breaker is open. The
grounding switch can only be operated when
the disconnect is open. The disconnect can only
be operated when the grounding switch is
open.
1. mcb: miniature circuit breaker.
• Please consult the order documents for the con-
ditions of further internal electrical interlocks in
the panels (e.g. disconnect – disconnect inter-
locks in double busbar systems) and panel to
panel electrical interlocks.
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