69
4 Installation
Connecting the high-voltage conductors
Brush the contact surfaces of the high-voltage terminals with a steel wire brush, which has only been used for
aluminium, until they are bright and slightly roughened. Wipe the contact surfaces off with lint-free paper or cloth
and lightly coat them with acid-free Vaseline, e.g. Shell Vaseline 8420.
Make the connections and tighten the screws. Before commissioning, retighten once again.
In the case of connecting parts made of copper, copper-aluminium spacers must be used.
4.6.3 Connecting the Leads
WARNING
To avoid damaging the circuit-breaker by inadvertent operation, switch on the power to the
motor only when the circuit-breaker has been filled with SF
6
gas. Pressure must at least be at
the level of general lockout SF
6
, see Table 4.
When the power to the motor is switched on, the closing springs are charged automatically.
) Note
Connecting cables must be fitted in dead state.
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