EMERGENCY EXIT EXPLOSIONPROOF. Type protection : Exd IIB, Exd IIC Class of temperature : T6 Protection degree : IP 54 / IP 65 Rated voltage : AC 220V / 50 Hz Implementing the standard : GB 3836.1-2000, GB3836, 2-2000, IEC60079. Emergency time : 90 min - 120 min ( LED: 48 h)