ABB UniGear ZS1 Instruction Manual

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Figure 85: Schematic diagram of the pressure relief duct. The components are assembled panel by panel and bolted
together with overlaps at the panel joints.
50 pressure relief duct
1) If the switchgear is equipped with a pressure relief duct, the pressure relief flap for the cable connection
compartment is fixed to the rear side of the panel and will open to the front (into the duct) in case of an
arc fault.
5.8.1 Standard gas duct
Once that the panels are fixed between them and to the floor, it is possible to start to fix the gas duct
on the top of the switchgear. Every panel have three fixing points in the front part (figure 86) and three
fixing points on the rear part (figure 87).
Figure 86: Fixing points on the front.
With nr. 6 screws 8x20 and nr. 6 washer M8, fix the front and rear part of the gas duct sheets
(figures 88, 89).
Figure 87: Fixing points on the rear.
Figure 88: Front sheet. Figure 89: Rear sheet.
1)
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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