Hi guys..
I am new to this forum.. I was observing some of the discussions here and I've seen a lot of professional electrical practitioners here.. By the way, I am an industrial electrician on one of the biggest petrochemical company here in KSA.. I only hold a working contract here because I am a Filipino..
We have an expansion on our plant..I want to know your expert opinion guys about this Liquid rotor starter (Water with sodium carbonate) which is recently installed on our 13.8 KV, 8 MW motor.. I know some of you guys already experienced this kind of set-up but since this kind of starter is new to me then I want to have an input about the advantages and disadvantages of this kind of starter..
Here’s the motor specs which having a liquid rotor starter:
KW = 8000
Rev / min = 1193
St. Volts = 13200 ± 5%
St. Amps = 394
Rotor Volts = 2778
Rot amps = 1727
Freq. = 60 Hz
Ph. = 3
Enclosure = IP55
Stator mass = 19000 kg
Rotor mass = 11600 kg
Cooler mass = 3400 kg
Rotor axial float = 12 mm total
Oil qty. / bearing = 34 liters / bearing
Oil flow / bearing = 9 liters/min/bearing
Water flow bundle = 396 liters / min
Our ambient temperature here reaches 56 degrees Celsius during summer and the motor application is for Polymer Extruder.. And also, There's no capacitor bank installed on this motor when I checked the drawing..
Dennis
