ABB ZS1 Instruction Manual page 9

3.3 Compartments in the panels
3.3.1 Busbar compartment
(Figures 3/5, 3/6, 5/8, 5/9, 5/11 and 5/12)
The busbars 3 have a D-shaped cross-section
made of copper or aluminium and are laid in
sections from panel to panel. According to the
current rating, single or double configuration is used.
They are held by the flat tee-off conductor 2 and the
busbar bushings 29 and/or 29.4. No special
connecting clamps are needed.
Busbars and tee-off conductors are insulated by
means of shrink-on sleeves. The bolt connections
in the busbar system are normally covered by insu-
lating covers 58, so that the entire configuration is
completely free of arc fault points of origin.
In conjunction with bushing plates 28 (or 28.2) and
29 and/or 29.4, panel by panel partitioning is
possible.
In switchgear with a short-time current more than
25 kA this partitioning may also be necessary for
reasons of stability.
3.3.2 Circuit-breaker compartment
(Figures 3/5, 3/7, 3/10 and 3/19)
The circuit-breaker compartment contains all the
necessary equipment for the mutual functioning of
the withdrawable breaker part and the panel. It is,
as the busbar compartment, metally partitioned on
all sides.
The isolating tulips 5 together with the fixed isolated
contacts are in the mounting plate 12. Also
included are the metal shutters 12.1 which cover
the insertion openings. The shutters are opened by
means of the actuating bars 13.16 of the
withdrawable breaker part using lever 38 when
inserting into the service position and are closed
when it is removed. In the test/disconnected
position of the withdrawable part, a partitioning by
separation is established in the main circuit current.
The connection of the control wiring which must be
established for test purposes need not be
interrupted when in the test/disconnected position.
The socket 10.1 for the control wiring is fixed-
mounted in the circuit-breaker compartment.
3.3.3 Withdrawable parts
(Figures 3/7, 3/8, 3/10, 3/11 and 3/21)
1. Withdrawable circuit-breaker parts
The withdrawable circuit-breaker forms a com-
plete module consisting of the circuit-breaker
type VD4, the withdrawable assembly 13.15, the
isolated contact arm 4.2 with the contact system
4.3 and the control wiring plug 10.2.
10
The withdrawable assembly 13.15 and the
circuit-breaker are coupled via a multipole
control-wiring plug connection 10.3.
The withdrawable assembly establishes the
mechanical connection between the panel and
the circuit-breaker. The fixed part is connected to
the panel by forking, form-coded on both sides.
The movable part with the circuit-breaker is
moved manually or by a motor by way of a
spindle, between
disconnected positions with the front doors
closed. Service and test disconnected positions
are exactly registered by means of auxiliary
switches, which register the final position reached
and the angular position of the spindle.
The earthing connection between the with-
drawable part and the panel is established by its
rollers and the travel rails 41 which are bolted
into the panel. The surfaces of all the parts of the
earthing circuit are zink-galvanized.
Withdrawable parts of the same design are
mutually interchangeable. In the case of the
withdrawable parts having the same dimen-
sions, but different equipping of the circuit-
breaker, the codification of the control wiring
plug prevents
between the withdrawable part and the panel.
2. Other withdrawable parts
In place of the circuit-breaker, the withdrawable
part can also be fitted to act as a „disconnecting
device" with a fixed current-bridge in VD4 pole-
casing, with a SF6 circuit-breaker or vacuum
contactor (both fabricated by ABB Sace).
The withdrawable part 95 is used in the metering
panel with a voltage transformer 95.1 with or
without HRC fuses as required. At the point of
contact of the movable contact-arms or the
HRC fuse
transformer,
tubes have been used.
3.3.4 Cable compartment
(Figures 3/1, 3/4, 3/5, 3/12, 3/13)
The cable compartment contains current trans-
former 7, voltage transformer 8 and earthing switch
6 in each case according to the individual operating
requirements.
The cable compartment is constructed for the
installation of three current transformers. Should all
three current transformers not be required, dum-
mies will be installed instead with the same
installation and connection procedures.
the service or
non-permitted connections
cartridges and the
dielectrically dense cast-resin
ABB Power Distribution
test
voltage