864-5091.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • Revision 06 155/214
Operation
37.3 Opening the three-position disconnector manually
➭ Pre-select busbar system for switching operation.
Selector gate to the left: Busbar system 1. Selector gate to the right: Busbar system 2.
➭ Push the left-hand control gate to the left.
✔ The opening for the DISCONNECTING function is free.
➭ Switch the three-position disconnector to OPEN position (insert the operating lever for
the DISCONNECTING function and turn 180° counter-clockwise).
✔ The three-position disconnector is open.
✔ The position indicator changes to OPEN position.
➭ Remove the operating lever for the DISCONNECTING function.
✔ The left-hand control gate returns to its initial position.
✔ The opening for the DISCONNECTING function is closed.
37.4 Activating the ready-to-earth function manually
Fig. 179: Opening the three-position disconnector
ATTENTION
In circuit-breaker panels, a mechanical interlock prevents the three-position disconnector from
being operated when the circuit-breaker is closed.
➭ Open the circuit-breaker (see page 148, "Opening the circuit-breaker manually").
ATTENTION
In disconnector panels without electromechanical/mechanical interlock, maloperation of the
three-position disconnector is possible. Here, the three-position disconnector can be operated
under load. Operating under load will destroy the three-position disconnector!
➭ Do not operate the three-position disconnector under load.
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