TEL TAVRIDA ELECTRIC VCB15 LD, User Manual

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Busbars and cables shall be connected with the ISM primary terminals mechanically in a stress-free manner.
No pressure, tension or torsion forces shall act on the ISM. To avoid unacceptable high mechanical loads on the
ISM, the busbar connections shall be supported by additional insulators (Figure 35).
The unsupported busbar shall not exceed the following length:
ISM15_LD 0.5 m
ISM15_Shell 1.0 m
ISM25_LD 0.5 m
Calibrated torque wrenches shall be used for mounting of switching modules and the connection of bus bars.
Points shown below should be used for mounting the ISM.
Required mounting points
Optional mounting points
Each two mounting points are required, either 3A+3B or 3A+3C
2
2
3
2 2
2
3C
3B
1
1
1
1
1
3A
Figure 35
LD ISM mounting points
Figure 36
HD ISM mounting points
Terminals:
holes Ø 10,5 mm (ISM15_LD_1(90) has thread holes M8)
Torque 30
±
3 Nm
Important:
It is not allowed to perform any close or trip operation for LD ISM while the nut M10 on the stud of
the ISM upper terminal (Figure 37) is not tightened.
Figure 37
Bolt sizes and torques
Terminals:
M10 stud
Torque 30
±
3 Nm
Fixing points:
Internal thread M16
Torque 30
±
3 Nm
Fixing points:
Internal thread M10
Torque 30
±
3 Nm
L1
L1
1
2