Dear All,
I have working of project which has 2 speed motor make siemens model No. 1LA2 226 - 0 & Name Plate rating as per below:
Delta - 67/90/125 0.82 Cos Phi 735 RPM
Star - 90/120/150 0.93 Cos Phi 1475 RPM
there are 9 lead termination in motor for high & Low speed but there is no any documetation available for motor wiring.
In High speed of motor there is Main contactor, star contactor & Delta contactor are working & Customer wants full rpm 1475 on motor output side.
Motor has connected worm gearbox through belt drive pulley & that ratio around come 14 : 1.
so maximum rpm of gearbox output side came 100 rpm.
These motor has been working on MCC Panel as star - delta contact logic.
now customer wants to connect VFD on these Motor & we are planing to offer 65KW 135 Amp.
There is continous current 110 A in three leads & 6 leads 50 A available on full load of motor running condition.
Please anybody support to wiring of VFD output to Motor & can it work 135 Amp, 120% overload capacity of 60s for these full load rpm motor.