ABB UniGear ZS1 Instruction Manual

52
Figure 81: 12/17.5kV panels - Top-mounted box with voltage transformers for busbar metering. The figure shows the
arrangement in panels without the busbar bushing plate 28 (see the notes in section 5.7.1)
28.3 Partitioning
79 Top-mounted box with voltage transformer
79.1 Intermediate box
79.2 Conductor tube
79.3 Reducer ring
Figure 82: 24 kV panels - Top-mounted box with high voltage transformers for busbar metering. The figure shows the
arrangement in panels with busbar bushing plate 28 and bushings 29
2.3 Flat branch conductor for voltage transformers
28 Bushing plate
79 Top-mounted box for busbar voltage transformers
79.1 Intermediate box
79.2 Conductor tube
79.3 Reducer ring
79.4 Pressure relief
79.4
79
2.3
28
79.2 79.3 79.1
79.2 79.3 79.1
79
28.3
5.7.2 Earthing switch for busbar earthing
• Top-mounted box 77 (figure 83) with screw fixing material from the “top-mounted box for earthing”
set of bags must be mounted on the busbar compartment;
• Operating mechanism box 78 with screw fixing material from the “top-mounted box for earthing” set
of bags must be mounted on the control cabinet;
• Pre-mounted single parts of hexagonal shaft 78.1 must be removed. Pay attention to the sequence
and angling of the parts!,

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