Customer :
Three-phase induction motor - Squirrel cage rotor
No.:
Date: 17-DEC-2012
TECHNICAL PROPOSAL
Product line :
Catalog Number : 25009ET3G449T-W22
List Price : $56,168
Notes:
Performed by: Checked:
W22 NEMA Premium - Ball Bearings
DATA SHEET
Three-phase induction motor - Squirrel cage rotor
Customer :
Product line :
Frame : L447/9T
Output : 250 HP
Frequency : 60 Hz
Poles : 8
Full load speed : 890
Slip : 1.11 %
Voltage : 460 V
Rated current : 308 A
Locked rotor current : 1850 A
Locked rotor current (Il/In) : 6.0
No-load current : 130 A
Full load torque : 1455 lb.ft
Locked rotor torque : 200 %
Breakdown torque : 230 %
Design : B
Insulation class : F
Temperature rise : 80 K
Locked rotor time : 24 s (hot)
Service factor : 1.15
Duty cycle : S1
Ambient temperature : -20°C - +40°C
Altitude : 1000
Degree of Protection : IP55
Approximate weight : 3550 lb
Moment of inertia : 254.72 sq.ft.lb
Noise level : 64 dB(A)
W22 NEMA Premium - Ball Bearings
No.:
Date: 17-DEC-2012
D.E. N.D.E. Load Power factor Efficiency (%)
Bearings 6322 C3 6319 C3 100% 0.79 95.4
Regreasing interval 20000 h 20000 h 75% 0.75 95.4
Grease amount 60 g 45 g 50% 0.65 95.4
Notes:
Performed by Checked