Single-phase A.C. tachogenerator GE120-.., GE121-.., GE122-.. Heavy-duty tachogenerator Straightforward application Suitable for extremely rigorous operating conditions NORIS tachogenerators are maintenance-free Rugged construction Noise-immune signal transmission Direct or indirect drive possible Protection class: IP66 (from 3000 rpm up: IP54) Choice of mechanical connections for speed sensing Flanges and brackets available for mounting Suitable evaluation devices available Tachogenerators of series GE.. NORIS A.C. tachogenerators are maintenance-free speed-meas- is desired for indicating instruments, monitoring or processing devices. uring devices using permanent-magnet excitation. They are designed Drive is either direct from the take-off shaft by means of couplings or to provide an A.C. voltage signal that is proportional to a speed of indirectly via belt-and-pulley or friction wheel arrangements. Tacho- their drive shaft. It is possible to use either voltage or frequency as the generators are working without operating voltage. measured variable. Tachogenerators are used where a direct supply General notes on Type GE120-.., GE121-.., GE122-.. Method of operating of GE120-.., GE121-.., GE122-.. tachogenerator Voltage characteristic Load characteristic The drive shaft rotates a permanent magnet in a stationary The voltage characteristic shows The load characteristic shows conductor and induces a voltage in the latter whose amount and the output voltage plotted against the drop in output voltage in % frequency are proportional to the speed of the drive shaft. The at varying loads and at different GE12x-.. is of 12 the pole type having 6 pairs of poles so that the frequency of the alternating voltage is 1/10 of the input speed. Details of the GE120-.., GE121-.., GE122-.. tachogenerator • There are three speed-range variants available of this series: • GE120 for full-scale speed range 60 ... 1,000 rpm • High electric output for multiple indicator operation • Extremely long life through extra-sturdy suspension of drive shaft • Direct drive possible via flexible couplings • Extremely high protection class (up to 3,000 rpm) and rugged construction • Indirect drive possible via V-belt pulleys or friction wheels • Wheels or pulleys can be mounted directly on the shaft • Electrical termination by screw terminals • Output is an approximately sinusoidal A.C. voltage • GE121 for full-scale speed range 150 ... 2,500 rpm • GE122 for full-scale speed range 500 ... 6,000 rpm Voltage drop Voltage drop

Other Data Series GE120-.., GE121-.., GE122-.. Termination Screw terminals, with cable entry PG16 Accessory to tachogenerators Item additional by inquiry additional information for drive and mounting see drawing Type key / variants Device code GE Variant without designation NORIS Automation GmbH Muggenhofer Strasse 95 D - 90429 Nurnberg Germany Tel.: +49 (0)9 11/32 01-0 Fax: +49 (0)9 11/32 01-150 [email protected] www.noris-automation.com Version A: 03/2005 Changes reserve