Ed/BEd ExHUAWU
Explosion-Proof Thrusters .
Ed, BEd Series Explosion Protected Thrusters
Explosion-protected electro-hydraulic thrusters for brakes and actuators in coal mines and in areas with explosive gas or dust. Ed Ex complies with GB 3836.2 and GB 12476.1-2000 with markings Exd I, Exd II BT4 and DIP A20T4 (dust zones 20–22); BEd is a mining version, Exd I, for 660/1,140 V with a Chinese coal-mine safety certificate (MA). Thrust 300–3,000 N, stroke 50–120 mm, power 250–800 W, weight 21–75 kg. Dry motor with class F insulation; three cable entry positions. Options: limit switches, spring, 5–30 s delay valves, heater.
Applications
- Brakes of conveyors and winches in coal mines
- Crane brakes in hazardous areas
- Valves and gates in explosion-hazardous shops
- Equipment in combustible dust zones 20–22
Specifications
- Rated thrust
- 300–3,000 N
- Rated stroke
- 50, 60, 120 mm
- Explosion-protection marking
- Ed: Exd I, Exd II BT4, DIP A20T4; BEd: Exd I
- Standards
- GB 3836.2, GB 12476.1-2000; CNEx certificates, MA (BEd)
- Supply
- Ed: 3 × 380–400 V, 50 Hz; BEd: 660 or 1,140 V, 50 Hz
- Power consumption
- 250–800 W
- Operating frequency
- Ed up to 2,000 cycles/h; BEd up to 1,200 cycles/h
- Operating conditions
- −20…+40 °C, altitude up to 2,000 m; class F insulation