TEL TAVRIDA ELECTRIC VCB15 LD, User Manual

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If the insulation cap set CBkit_Ins_3 will not be used the compliance with the rated insulation level shall be verified
by a voltage test.
Figure 43
CBkit_Ins_3 installation
Busbar for 24 kV ISM
If the PCD of the ISM25_LD_1 is 210 mm, the
connected busbars shall have the shape as shown in
Figure 44.
If external busbars have rectangular
cross-section, additional insulation
barriers between poles shall be used if air clearance
between busbars is less than 190 mm
.
Figure 44
Cross-section of the busbar connected to the pole
40 mm
10 mm
R 5 mm
4.1.4 Main terminal connections of HD ISM
Primary terminals connection
To comply with the rated impulse withstand voltage of 95 kV (75 kV for 150 mm PCD) according to
IEC 62271-1 it is recommended to use CBkit_Shell15_1.
If CBkit_Ins_3 will not be used compliance with the rated insulation level shall be verified by a voltage test.
M16 bolts fixing busbars (or contact arms) to HD ISM terminals should be tightened with a torque of 60±2 Nm.
To prevent static load on the ISM poles it is not allowed to fasten busbars to the HD ISM terminal if there is a
gap of more than one millimeter between the busbar and the ISM terminal just before this fastening. Bars shall
be accurately prepared to avoid bending and (or) twisting forces to terminals when these bars are fastened.
45
°
Det_PlastIns_48
Plastic insulator
Det_PlastIns_49
Plastic insulator
Det_Gasket_38
Gasket
Det_RubberIns_19
Rubber insulator
for upper connecting bolt
Support insulator
Det_RubberIns_19
Rubber insulator
for upper connecting bolt
Det_PlastIns_49
Plastic insulator
Det_PlastIns_48
Plastic insulator
Det_Gasket_38
Gasket
Support insulator