32 UNIGEAR ZS2 INSTALLATION, OPERATION AND MAINTAINANCE INSTRUCTION MANUAL
Use screws of tensile class 8.8. The maximum
recommended tightening torques based on each
type of connection are given in the following
tables:
1. Tightening torques for copper/Aluminium
bars or combined Flat Busbar connections.
Thread (2)
Max. recommended tightening
torque Nm (1)
M5(3) 2.5
M6(3) 10
M8 25
M10 50
M12 85
2. Tight. Torques for copper/Aluminium bar
connections combined with CTs.
Thread (2)
Max. recommended tightening
torque Nm (1)
M12 70
M10 50
3. Tight. Torques combined with Insulating parts
(Epoxy resin, BMC, SMC, ABS, PC etc.)
Thread (2)
Max. recommended tightening
torque Nm (1)
M8 15
M10 32
4. Tightening torques for Fixed Contacts inside
bushing and Insulator supports
Thread (2)
Max. recommended tightening
torque Nm (1)
M8 25
M10 50
M12 85
M20 220
—
6. Assembly of the switchgear panels
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