LEGRAND LE06499AE, Инструкция по установке, использованию и техническому обслуживанию

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17
Cast Resin Transformers
Installa
tion, use and main
tenanc
e manual
5.4 Tightening torque for electrical and mechanical connections
Tighten screws and bolts of electrical and mechanical connections in accordance with the values reported in the table: it
is recommended to re-test after a few hours of operation to eliminate the effects of any adjustments.
During the operations of clamping always use two wrenches to prevent distortion or damage.
Electrical connection [Nm]
Mechanical
connection
Screw / Bolt Steel Brass [Nm] (mm)
M 6 10 - 15 5 - 10 20 10
M 8 30 - 40 10 - 15 35 13
M 10 50 - 60 20 - 30 45 17
M 12 60 - 70 40 - 50 60 19
M 14 90 - 100 60 - 70 100 22
M 16 120 - 130 80 - 90 150 24
M 18 - - 200 27
M 20 - - 270 30
M 22 - - 360 32
M 24 - - 460 36
5.5 Positioning
Cast resin transformers do not ensure contact insulation.
It is absolutely forbidden to touch the windings while the transformer is energised.
Therefore the transformer must always be installed in a metal enclosure,inside a cage or in a room with doors enabling
access only when the transformer is de-energised.
Inside this electrical enclosure the transformer has to be positioned complying with minimal insulation distance from the
walls. They are related to the insulation class shown in the Rating plate.
kV A (mm) B (mm) C (mm)
≤ 12 ≥ 125 ≥ 60 (*)
≤ 17,5 ≥ 170 ≥ 80 (*)
≤ 24 ≥ 225 ≥ 120 (*)
≤ 36 ≥ 320 ≥ 200 (*)
C=B except when there is a voltage switch present on the
LV side whereby C = A
In order to prevent horizontal movement of the transfor-
mer the mounting direction of the wheels can be modi-
fied.
B B
C
A