Description: average operating time between two consecutive failures of a technical system that each initiate a period of downtime; Name: mtbf
Description: expectation of the operating time between failures; Name: mean time between failures (MTBF)
Description: Allocation of explosion-protected electrical operating media according to their maximum surface temperature for use in explosion-capable atmosphere in accordance with (IEC 50(426):1990; Name: Explosion protection temperature class of the electric motor