| 摘要 |
Device for staircase lighting is intended for multistorey skyscrapers for staircase ligthing with possibility of adjusting period or pressure of any key (T1-Tn) prolonged duration of light. This device has a long duration time, and is effective even in the case of short circuit between (S) and (0) in installation, at activation of working switch (RS) contact (9-6) due to electric arc is glued. In this case, the spot of short circuit is identified, and if possible, separated is a connection contact is separated, and thereupon is misplaced the connected conductor from (S-1) in (S-2) of the foot, root, base switch, breaker or circuit (PS), then device is ready again for further use. Should it be that the contact can be separated, then the working switch (RS) is replaced with another.
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