40 | Manual ZX0 HB 600 en - Revision 05
4.1.2 Mechanism variants
Four different operating mechanisms for three position discon-
nectors are available: manual mechanisms 1 and 2, and motor-
operated mechanisms 1 and 2. In the following sections you will
find a detailed description of operation of these mechanisms and
the corresponding circuit-breaker operating mechanisms.
See table 4.1.2.1 for assignment of the three position disconnec-
tor mechanisms.
The following applies to all switching operations:
With the exception of emergency manual operation,
switching operations may only be performed with
the low voltage compartment door closed.
4
2
1
3
8
7
5
6
Table 4.1.2.1: Assignment of the three position disconnector mechanisms to the panel widths
Three position disconnector mechanism Panel width / mm
max. I
r
/ A
Manual mechanism 1 400
800
Manual mechanism 2 600
1250
Motor operated mechanism 1
400
800
600
1250
Motor operated mechanism 2 600
1250
4.1.2.1 Manual mechanism 1
Operation of manual mechanism 1 (figure 4.1.2.1.1) is purely
manual, with the exception of the motorized or manual stored
energy spring mechanism for the circuit-breaker. The three posi-
Fig. 4.1.2.1.1: Manual mechanism 1: Displays and controls
Turning of the selector lever (4) causes a slide to release the open-
ing (5 or 7) for the operating lever of the disconnector or earthing
switch. The selector lever can only be turned when the circuit-
breaker is open. The selector lever can only be turned for earthing
4.1.2.1.1 Operation of the
circuit-breaker
− Mechanical switch position indication is effected by a
graphical symbol (3) in the low voltage compartment door.
− In order to change the switching condition of the circuit-
breaker, press the mechanical OFF button (1) or the me-
chanical ON button (2).
4.1.2.1.2 Operation of the
three position disconnector
1 OFF button for circuit-breaker
2 ON button for circuit-breaker
3 Switch position indicator for
circuit-breaker
4 Selector lever
5 Opening for disconnector operation
6 Switch position indicator for
disconnector
7 Opening for earthing switch
operation
8 Switch position indicator for
earthing switch
tion disconnector is mechanically interlocked against the closed
circuit-breaker. Operation of the earthing switch is only possible
when the disconnector is open, and vice versa.
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