Product design: Three-phase motor, Ex II 2G Ex eb IIB+H2 T3/T4 Gb X / Ex II 2G Ex h IIB+H2 T3/T4 Gb X. For operating temperatures of -20 °C <= Ta <= +60 °C. Can be switched for ventilation or exhaust. Special properties: Axial wall fan, explosion-proof, medium gas. Explosion protection and approvals according to ATEX and IECEx. For all gases and vapors of Ex group IIA and IIB and additionally qualified for hydrogen. MAICO Ex fans meet the safety requirements of the European Directive RL 2014/34/EU for equipment and protective systems in potentially explosive areas. For zones 1 and 2. Ignition protection types: e - increased safety and c - structural safety. Protection class IP 64. Protective grille on the suction side, contact protection according to DIN EN ISO 13857. Can be installed in any position. Type series: EZQ / DZQ .. Ex e with square wall plate. EZS / DZS .. Ex e with steel wall ring. Impeller: Axial impeller made of conductive plastic. Balance quality of the motor-impeller combination G 6.3 according to category BV-3 in accordance with ISO 14694. Air flow direction: The air flow direction is marked. Standard exhaust air operation, air flow direction suction via motor. Three-phase motor: Robust three-phase motor with ball bearing, maintenance-free. Reversible. Reversible operation: The volume flow is reduced by approx. 35% if the air flow direction is abnormal. Operating mode S1 (continuous operation). Speed control with transformer TR... possible. Exception: DZ.. 35/2 B Ex... The temperature in the fan motor is monitored by PTC thermistors. The PTC thermistors must be connected to a release system (safety device according to Directive 2014/34/EU) that permanently disconnects the fan from the power supply if the temperature is too high. The MAICO PTC thermistor tripping system MVS 6 or TMS is recommended as the tripping system. Electrical connection: EZ .. Ex ..: connecting cable approx. 0.5 m long. DZ .. Ex ..: connecting cable approx. 1.7 m long. Separate terminal box, explosion-proof, with cable gland.Article: DZS 35/4 B Ex e, design: steel wall ring, delivery volume: 2660 m3/h, speed: 1455 1/min, impeller type: axial, speed controllable: yes, reversibility: yes, voltage type: three-phase current, rated voltage: 400 V, mains frequency: 50 Hz, rated power: 125 W, cosphi: 0.36, INom: 0.49 A, Imax at UNom: 0.51 A, protection class: IP 64, thermal class: F, installation location: wall / ceiling, installation type: surface-mounted, installation position: vertical / horizontal, material: sheet steel, galvanized, housing material: sheet steel, galvanized, color: galvanized, weight: 8.15 kg, weight with packaging: 10.84 kg, nominal width: 350 mm, width: 525 mm, height: 525 mm, depth: 268 mm, width with packaging: 615 mm, height with packaging: 615 mm, depth with packaging: 400 mm, EX designation according to ATEX directive: Ex II 2 G, EX designation according to standard: Ex eb IIB + H2 T3 Gb / Ex h IIB + H2 T3 Gb, Ta ambient temperature: -20 °C <= Ta <= +60 °C, IA/IN: 3.4, time tA: 170 sec, operating mode: S1, PTC DIN 44082: M 130, EC type examination certificate: TÜV-A 19 ATEX0102 X, IECEx EPS 19.0018X,Temperature class: T3, thermal class of insulating materials Th. Cl.: 155 (F)