Safety information 2.2 Five safety rules for work in or on electrical systems Explanations 1. The isolating distances between live and deenergized parts of the system must vary according to the operating voltage that is applied. "Isolate" refers to the all-pole disconnection of live parts. All-pole disconnection can be achieved, e.g. by.: - Switching off the miniature circuit breaker - Switching off the motor circuit breaker - Unscrewing fusible links - Removing LV HRC fuses 2. The feeder must be secured against inadvertent restarting to ensure that it remains isolated for the duration of the work.
This can be achieved, for instance, by securing the motor and miniature circuit breakers with lockable blocking elements in the disconnected state, either using a lock or by unscrewing the fuses. 3. The deenergized state of the equipment should be verified using suitable test equipment, e.g. a two-pole voltmeter. Single-pole test pins are not suitable for this purpose. The absence of power must be established for all poles, phase to phase, and phase to N/PE. 4. Grounding and short-circuiting are only mandatory if the system has a nominal voltage greater than 1 kV. In this case, the system should always be grounded first and then connected to the live parts to be short-circuited. 5.
These parts should be covered, or barriers erected around them, to avoid accidental contact during the work with adjacent parts that are still live. SIRIUS 3RW30 / 3RW40 14 Manual, 01/2010, 535 1995-02 DS01