E89_prospect.pdf (ENG) - Iskraemeco

E89...BEARINGSUpper bearingis a spindle version and serves as anaxial rotor guide. A pin made ofstainless steel smoothly slides in thesintered graphite bearing. The pin ispressed in to the brass sleeve. Thepin is rounded in order to preventdamages of the bearing surfaces. Asleeve with the pin is fastened to themeter frame.WormA graphite insert is pressed in toa plastic guide and forms an integralpart with the worm. The bearing hasvery low and time-constant friction.No lubrication is required.Lower bearingis designed as a carrying bearing.The repulsive magnetic field of bothbearing parts completely compensatesthe rotor weight. The upperpart of the magnetic bearing ispressed on to the rotor shaft togetherwith the graphite guide. The lowerpart of the magnetic bearing is fixedto the meter frame together with aguiding pin and brass internal andexternal sleeves. A plate fortemperature compensation is a partof the lower magnet assembly, aswell. A guiding pin is made of qualitystainless steel. It is rounded on thelower part in order to prevent damagesof the bearing surfaces.The bearing has small and time constantfriction what assures long lifeof the meter. No lubrication of thebearing is required. The bearingheight can be set and there is noneed to reset the height in case ofrotor replacement.REGISTERSSingle- Rate Registerconsist of six or seven graduateddrums. The periphery of the lastdrum is divided in 100 sections. Thinpolished axles are rotating in plasticbearings causing minimum frictionand high error stability at smallloads. No lubrication of bearings isnecessary. The register frameworkcan be fastened to the meter frameworkwith one screw without anadjustment plate, so that the wormand the worm wheel fit each othercompletely.Two versions of single-tariff registerare produced: a register with standarddigit drum with the size of numbers4,7x2,3 mm and a register withlarger digit drum with size of numbers6,9 x 3,65 mm.The continuous- resetable type andthe jumping- resetable type of largeregister are also available.TYPICAL PERFORMANCE CHARACTERISTIC– type E89C, E89E – type E89FLoad dependenceUnity power factor0.5 power factor (lagging)Unity power factor0.5 power factor (lagging)E89CE89E+21p% 01–25 10 20 50 100 200 300 400 500% Ib+21p% 01–25 10 20 50 100 200300 400 500 600% IbInfluence of change in:+21p% 01–290voltages100 110% Ur+21p% 01–295frequency100 105% fr10% Ib+21p% 01–290voltages100 110% Ur+21p% 01–295frequency100 105% fr10% Ib+21p% 01–290+21p% 01–2100 110% Ur 95100 105% fr100% Ib+21p% 01–290+21p% 01–2100 110% Ur 95100 105% fr100% Ib+21p% 01–290+21p% 01–2100 110% Ur 95Imax100 105% fr+21p% 01–290+21p% 01–2100 110% Ur 95Imax100 105% frDependance on external temperature100% Ib Unity power factor100% Ib 0.5 power factor10% Ib Unity power factor+21p% 01–2–25 –15 –5 +5 +15 +25 +35 +45 +55 +65 °C10% Ib to Imax Unity power factor20% Ib to Imax 0.5 power factor+21p% 01–210 0 10 20 30 40+50 °C