ABB UniGear ZS1 Instruction Manual

36
80
Æ 16
80
Æ 16
M 12
M 12
Figure 57: Through hole on metal structure Figure 58: Threaded hole on metal structure
Figure 55: Anchoring bolts on concrete floor Figure 56: Base irons on concrete floor
5.3 Assembly of the switchgear panels
Use screws of tensile class 8.8. The tightening torques for the busbar screw connections with dished
washer are as follows:
Any tightening torques which deviate from those in the general table (e.g. for contact systems or device
terminals) must be taken into account as stated in the detailed technical documentation.
It is recommended that the threads and head contact surfaces of bolts should be lightly oiled or
greased, so as to achieve a precise rated tightening torque.
Recommended tightening torque
1) 2)
Nm
Lubricant
3)
Thread Without Oil or grease
M6 10.5 4.5
M8 26 10
M10 44.1 20
M12 74.6 40
M16 165 80
1)
The rated tightening torques for fasteners without lubrication are based on a coefficient of friction for the thread of 0.14 (the actual
values are subject to an unavoidable range, in part not inconsiderable).
2)
Rated tightening torques for fasteners with lubrication in accordance with DIN 43 673 Standard .
3)
Thread and head contact surface lubricated.

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