Circuit broken when shut ioff3/28/2023 In installations in non-industrial or commercial premises, offices (or similar, measuring less than 500 m2), the main control and protection device at the origin of the installation may be used for emergency breaking, if it is easily accessible. This provision is designed to avoid accidental operation of the emergency breaking devices by limiting access to operating staff (for example, in public buildings).Ĭaution: if the door of the board concerned is closed and locked with a key, a separate mechanical control or an external electrical control is necessary. The emergency breaking device can be located remotely in the secondary distribution board which supplies all the local circuits, as long as it is easily accessible, identifiable and installed in a location where the danger may occur or be detected. This provision applies in particular to lighting circuits. It should be noted that in this case, the breaking of single-phase (Ph+N) terminal circuits is possible with a single-pole device. On/off functional control devices (such as switches, contactors, circuit breakers) can be used for emergency breaking if they meet the above requirements. In principle, the emergency breaking device should be located on or near the devices(s) to be broken, and be easily identifiable (by operating or emergency staff). Specific regulations can extend its application to other circuits. Standard IEC 6 defines the conditions for emergency breaking. This must be possible on load and in a single operation. It must break all live conductors (including neutral, but not pe or pen).
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |