Safety
Assembly Instructions
4
1HSB435410-2 enrev1
2.2 Safety, general
WARNING
Circuit-breaker with pressurised porcelain insulators.
Mechanical effects on the porcelain can cause it to explode with the
following risk of splintering.
Work on the circuit-breaker that brings about the risk of mechanical
damage to the insulators should be carried out at a reduced gas pressure,
0.125 MPa (abs).
WARNING
Do not operate the operating mechanism unloaded!
Operations shall take place only when the mechanism has been connected
and adjusted to the associated pressurised circuit-breaker.
The standard operating cycle is O - 0.3 s - CO - 3 min.-CO. The time between
closing operations should not be under 1 minute during the testing of circuit-
breakers and relay systems involving more than 3 closing operations.
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