Motor triping issue

MaintenanceForums

Dear Members ,

Here I am informing to all I am facing problem in Air Fin Fan cooler at my working plant (Methanol Company ).

Problem : High vibration was observed at gearbox .

after replacing new gearbox I take motor solo run reading vibration was observed normal and during solo run no tripping and also more then 1 hour running no tripping.

After that inform connect coupling and confirm for test run .

Today I went for test run after 12 min of normal operation motor tripped .

1.Motor and gearbox Overall maximum vibration was 4.5 mm/sec .

2.The high vibration 4.5mm/sec was observed at motor vertical direction .

3.Motor and gearbox temperature found normal around 45 c

4.Motor Amps @ 70 another fin fan cooler running as a same AMPS .

Motor Running RPM 1140

Out put RPM 224

Motor Kw - 55

So any one suggest me the problem (motor or gearbox )and the cause of tripping .

Tags: Motor, tripped

Replies sorted oldest to newest

Registered Member

Hi Bijoy,

What is the tripping point? high current? vibration?

try check the OL setting, also what is the driven by the gearbox? conveyor? or else?

regards,

5/15/188:25 PM

Registered Member

Hi Bijoy,

What is motor capacity? What driven by gearbox ? and also what tripping point ? high vibration or high current?

What power line frequency is 60Hz or 50Hz?

5/15/1811:42 PM

Registered Member

Dear Rotating guy and Mateso Lugodisha ,

Motor capacity : 55 kw

Tripping Point and high Current : 70 amps

High Vibration : 4.5 mm/sec

Air Fin cooling fan driven by gearbox.

Motor Volt : 440

5/16/186:19 AM

Registered Member

I agree with the others as they are asking to specify what signal caused the motor to activate the shutdown. Did the motor trip on high vibration or overload or something else?

If I correctly understood your posts, the trip took place on electrical protection when the motor current activated the overload trip relay. This is odd if an identical sister machine runs at the same current but it does not trip.

Can you confirm my understanding ?

Regards- Ali M. Al-Shurafa

5/17/1810:30 AM