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05May94 UK: IN-THE-HEAD WITH WACKER.

Essex-based compaction specialist Wacker has produced a range of motor-in-the-head internal vibrators called IRFU. The IRFU range is available in 40, 48 and 57 mm diameters.The switch box houses an electronic invertor which enables the vibrator to operate directly on 115 V, 50 Hz, single phase supply or convert it to 200 Hz three phase supply for the necessary 12,000 vibrations a minute.The IRFU pokers are protected against all external failures switch themselves off in the event of overheating, phase loss, overcurrent, low voltage or earthing. The operator is protected by a 0.2 millisecond earth leakage trip.Wacker GB 0992 763637. CONSTRUCTION NEWS