vectrostar r25 - r65 - r120 - VEM motors Finland Oy

II)Commissioninga) Introduction* Important note:To be definitive, the dosing must be done onsite, in the most difficultstarting conditions. Even if the starting is exceptionally done loaded, itis necessary to have these conditions for the adjustment.b) Measuring instrumentRemark: The rotor voltage of a ring motor is equal to U r (rotor locked). This valueis indicated on the motor plate.As the motor is speeding up, U r decreases, aiming at a low voltage at the end ofstarting (lower than 6% of U r written on the plate).The best way to follow the speed variations of the motor is to measure thevariations of the rotor voltage.Connect a voltmeter between two of the three starter bars.‣ The voltmeter calibre must be compatible with the maximum alternativevoltage U r (see motor plate).c) Preparation of the electrolyteATTENTION :‣ Do not pour the electrolyte into the starter right after the preparation.‣ Electrolyte is a dangerous chemical.⇒ Handle with care.⇒ Put on gloves. In case of contact with the skin or the eyes, rinseabundantly and take medical advice.In a water bucket, pour soda gradually according to the following table:R25 R65 R120 R200Quantity of water (l) ½ 1 1 2Quantity of electrolyte (g) 250 500 500 1000It should be observed that during the dilution, an exothermic reaction occurs. Themixture temperature can rise up to 90°C.Let it cool down.Once the mixture has cooled down, pour it into the dosing bottle according to the followingfigure.