Question for Impact of Oil Mist Dispersion at Motor Winding & Terminal Box

Nice you have identified the problem prior to failure of winding insulation . Now find the source of oil leakages and then plugged the source first and then dry the motor winding with CRC ( Carbon tetra cloride ) or Petrol to oil mist.

Carbon tetrachloride is a toxic material and poses threat to human health. It also emits ozone depleting and green house gas.Hence this material should not be used during maintenance of electrical equipment.

Well, it sounds as though this is an explosion that hasn't quite happened yet.

• Presumably the equipment is shut down until the problem is solved?
• Presumably the motor manufacturer has been contacted for advice?
• Presumably the fire protection insurance policy on the facility covers risks of this sort including loss of production turnover?
• Presumably all CR4 readers are standing well back when the equipment is running?
• Presumably the Engineer in charge of activities there has Professional Indemnity Insurance cover?

Sheesh.

Are these the motor winding RTD's?

Or are they bearing RTD's?

If they are bearing RTD's there is oil present at all times and it becomes pressurized when the motor runs.

If the RTD's are direct-contact without a protective housing/well, you need to tighten the "O" ring seal adjustment nut and/or replace the "O" ring.

If they are not direct-contact and are installed in a housing/well; you need to remove the housing/well and seal the motor housing/well penetration hole threads with a quality sealant such as oil resistant RTV and make sure there are not any bad welds or other conditions that allow the oil to enter the well.

Hello friend,

1.The oil found inside the motor will not harm motor due to that oil is gear oil. B'coz It's 1 kind of insulation oil. motor will not burn. You have time to find out the root cause. Also, check the oil level in gear box. may be excess to the point of mark.

2. Many case we found due to oil seal got damaged that oil is enter into motor as well as TB. But you need to clean with help of petrol with help of paint brush, clean it properlyt.Then, keep that motor stator under room temp for just 10 to 15 minutes. After apply insulation ( winding insulation ), keep under 100 w bulb for 8 hrs.

So, that your motor insulation lavel will not decrease. Also, try to sort out the quality oil seal from market to fix it....!

All the best.......!