Manual Mechanism; Operation Of The Circuit-Breaker; Operation Of The Three Position Disconnector; 4.1.2 Mechanism Variants - ABB ZX0 Manual For Installation And Operation

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.

4.1.2.1 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-
Table 4.1.2.1: Assignment of the three position disconnector mechanisms to the panel widths
Three position disconnector mechanism
Manual mechanism 1
Manual mechanism 2
Motor operated mechanism 1
Motor operated mechanism 2
1
2
3
4
5
6
7
8
40 | Manual ZX0 HB 600 en - Revision 05
OFF button for circuit-breaker
ON button for circuit-breaker
Switch position indicator for
circuit-breaker
Selector lever
Opening for disconnector operation
Switch position indicator for
disconnector
Opening for earthing switch
operation
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.
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
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
Panel width / mm
400
600
400
600
600
Fig. 4.1.2.1.1: Manual mechanism 1: Displays and controls
max. I / A
r
800
1250
800
1250
1250
6
5
4
7
8
2
1
3