ABB UniGear ZS1 Instruction Manual

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5.8.3 Compact gas duct with top chimneys
In order to mount the compact gas duct with top chimneys must be followed the operations described
for the compact gas duct.
The difference between the two solutions is that in this case there are no side exits, but the gas
generated from an internal arc goes out from the duct through the top chimneys located on the top part
of the gas duct on each panel.
On the top of the gas duct there are two openings (figure 97); for each opening it must be fix the net
and the nr.6 spacers (figure 98).
At this point it is possible to fix the top cover with nr.12 M8 screws.
Figure 99: Top cover of top chimneys.
Figure 97: Openings on top of the gas duct. Figure 98: Net and spacers of top chimneys.

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