ABB UniGear ZS1 User Manual

17
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4. Panel design and equipment
4.3 Compartments in the
panels
There are six types of current and voltage sensors
for UniGear ZS1 Digital:
• KEVA 17.5B20
voltage sensor with ratio 10000:1
• KECA 80C104
current sensor with ratio 150 mV@80 A
• KECA 80C165
current sensor with ratio 150 mV@80 A
(for nominal voltage up to 17.5 kV)
• KEVA 24B20
voltage sensor with ratio 10000:1
• KECA 80C184
current sensor with ratio 150mV@80A
• KECA 80C216
current sensor with ratio 150mV@80A
(for nominal voltage 24 kV)
Rated voltage
Rated short-time
withstand current
Partitions
12 / 17.5 kV
25 kA
Every lateral panel;
from 12 panels
additional partiton
in the middle;
from 21 panels one
additional partition
in each third of the
switchgear
31.5 kA
Every lateral panel
and every third
panel
40; 50; 63 kA Every panel
24 kV
25 kA
Every lateral panel;
from 12 panels
additional partiton
in the middle;
from 21 panels one
additional partition
in each third of the
switchgear
31.5 kA Every panel
Marine/
Seismic
version
All ratings Every panel
According to customer requirements, this
separation into individual panels by means of
busbar bushings and bushing plates can also be
provided in switchgear panels where it is not
technically necessary. Top-mounted boxes with
busbar earthing switches, or busbar voltage
transformers can be placed above the panels.
Busbar compartment
The busbars have a flat cross-section made of
copper and are laid in sections from panel to
panel. For higher rated currents (3 150, 3 600 and
4 000 A), the busbars have a open D-shaped
cross-section. According to the current rating,
either single or double configuration is used.
They are held in place by the flat branch
conductor and, if installed, by busbar bushings.
No special connection clamps are needed.
Busbars and branch conductors for 17.5 and 24 kV
are insulated by means of shrink-on sleeves. The
bolt connections in the 17.5 and 24 kV busbar
system are covered by insulating covers.
Optionally busbars for 12 kV panels up to 2 500 A
do not have shrink-on sleeves. Open D-shaped
busbars 3 150, 3 600 and 4 000 A are insulated
and the connections are covered.
By means of bushing plates and busbar bushings,
partitions can be created between panels. These
partitions are necessary for higher rated short-
time currents, see the following table.
Figure 7: Voltage sensors in busbar compartment in
UniGear ZS1 Digital

ABB UniGear ZS1 Specifications

General

Rated Voltage	up to 24 kV
Rated Current	up to 4000 A
Frequency	50/60 Hz
Rated Short-Circuit Breaking Current	up to 50 kA
Rated Peak Withstand Current	up to 125 kA
Insulation	Air-insulated
Type of Switchgear	Metal-clad
Rated Short-time Withstand Current	up to 50 kA for 3s
Internal Arc Classification	IAC AFLR
Protection Degree	IP4X
Busbar System	Single and double busbar
Type Tested Assembly	IEC 62271-200
Dimensions	Varies depending on configuration
Weight	Varies depending on configuration