ABB ZS1 Instruction Manual page 10

The fixed-mounted voltage transformers are
connected on the primary side with flexible,
completely insulated wirings which are inserted into
the transformers.
In certain circumstances it is possible to use
removable voltage transformers. They can be
equipped with HRC fuses as in the metering panel.
The earthing switch type EK6 can be used either
with manual or motor-operated mechanism. Its
switching position will be indicated by means of the
auxiliary switch both mechanically and electrically.
In the 650 mm wide panel, it is possible (according
to choice) to prepare for up to three parallel three-
core cables if required. In the standard version, the
intended equipping is a plastic cable with single
cable core protection. Intended maximum cross-
section is 240 mm
In the 800 mm or 1000 mm wide panel up to six
parallel plastic cables can be connected also with
single cable core protection and push-on sealing
ends with a cross section of maximum 500 mm
An alternative could be the 650 mm wide panel
socket-contacts with inner cones for connection to
the cable plugs. Customer wishes regarding the
connections to bars or special cable or sealing-end
types must be considered during the order-
planning phase.
In place of the three cable cores, three surge
arrestors can be fixed-mounted. An alternative
would be, under certain conditions, to have these
in a withdrawable form.
In the Duplex version, the cable compartment is
modified as follows:
• In the back to back version, the connection
between the two panels consists of flat copper
bars.
• In the front to front version it consists of made-
up plastic insulated cables or insulated busbar
capacitance grading device, depending on the
current.
3.3.5 Control cabinet
(Figures 3/1, 3/5, 3/14 and 3/15)
The control cabinet is for all matters of control and
protection suitable for both conventional or modern
control technology.
Apart from the usual case, a control cabinet of 705
mm in height, there is also a 1100 mm high version
for especially comprehensive secondary techno-
logy, which has a panel height of 2595 mm.
If the secondary devices are not intended for door
installation, they are mounted on perforated metal
sheet 37.3. This is stored folded-up to enable any
ABB Power Distribution
2 with push-on sealing ends.
subsequent changes to the wiring. In the lower part
of the control cabinet, three rows of terminal strips
are on the swivelling terminal strips holder 37.4 and
below these, auxiliary switch 10.4 for the control
wiring plug is easily accessible.
For doors in which devices with higher voltage than
that of low-voltage protection are installed, a
secure and
connection must be established. The corrosion
protected hinge of the control cabinet corresponds
to these requirements (DIN VDE 0660 part 500).
Protection against contact to clamps and devices
corresponds to VGB 4.
Secondary wiring internal to the panel is in a duct
on the right side of the panel. The left side of the
panel is for the external wiring. The ducts are
covered with steel sheet metal 43. At the side of the
control cabinet are holes for sliding in the ring
conductors.
Detailed
2
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technology and to the relevant material used in
each case can be obtained from the secondary
check-list pertaining to the order and the handbook
(switching book).
3.4 Interlocks/protection against maloperation
3.4.1 Panel internal interlocking
(Figures 3/5 and 3/8)
To prevent dangerous situations and maloperation,
a series of interlocks exist to protect both
personnel and equipment.:
• The withdrawable part can only be moved from
the test/disconnected position (and back) when
the circuit-breaker and earthing switch are off
(i.e., the switch must be off beforehand.) In the
in-between position, the switch is mechanically
interlocked, in the case of circuit-breakers with
electrical release, the interlock is also electrical.
• The circuit-breaker can only be switched on
when the withdrawable part is in the test or
service position. In the in-between position, the
switch is mechanically interlocked, in circuit-
breakers with electrical release there is an
electrical interlock too.
• In panels with digital control technology, pre-
vention of maloperation of the switch basically
takes place by means of the panel's software.
• In the service or test positions, the circuit-
breaker can only be switched off manually when
no control voltage is applied and cannot be
closed (electromechanical interlock).
complete protection
information about the
conductor
secondary
11