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No, didn't receive any I am afraid. Could you send me at ''[email protected]'' ? Regards, Mutahir

Sure. However, I was going through NEC-70 2020, Article 501.125.(B).3 and that's what I found: In Class 1, Div 2 locations, motors, generators or other rotating machinery shall comply with: (3) 'Be open or non-explosion proof enclosed motors, such as squirrel cage induction motors without...

Are there any Low-Voltage, Single-Phase, Fractional-HP motors ? No, not in this area. Regards, Mutahir

1) Can you provide a picture of a medium voltage motor's nameplate, especially one 50 yrs old ? I am attaching the Nameplates. 2) What is the "HSE" section ? HSE Section is Health, Safety and Environment section of our site. They audit classification of equipment and general installations. 3)...

My two bits on the subject are: The Solar panel plates are completely enclosed. The surface temperature of the plated rise as they are exposed to the sun. That rise in surface temp should not come close to the ignition temp of the gas present in the classified area. Also there should not be any...

The thing is, we have a Class 1, Div 2, Group B area at site. The old motors installed there are non-classified. But they don't have a sparking component in them as well e.g. carbon brushes, breaks, metal fans, capacitors. They are standard medium voltage Induction motors. Now, If we buy new...

IEEE Std 1349-2001 I will check the 2021 out as well. Regards, Mutahir

T Thank you for your insightful reply. I agree, at the end, it always comes down to economics of things and sometime the field engineer fails to grasp that part of the picture.

This is what the document states: **Quote** Fuel Heating: Most of the combined cycle turbine installations are designed for maximum efficiency. These plants often utilize integrated fuel gas heaters. Heated fuel results in higher turbine efficiency due to the reduced fuel flow required to...

Hey Sara, Failed as in? What tests have you done to declare that they have failed? The Voltage has dropped to '0' or lesser than the other cells? How less? Is there any observable or pinhole type leakage from the cells ? As a general rule of thumb, a battery string that has had or is ready to...

Thanks Phil.

No they are not. We changed those.

Yes, it was like this before. But we tuned the Governor and AVR settings after that. At first when this problem started the GGs weren't syncing at all at any value of KW. After tune-up of deep sea we were able to sync them at 50K and above. After further tune-up of PID settings now we are...

Guys, Can anyone guide me on the PID settings of AVR? My original settings in both CAT Digital Voltage Regulator were: P-200 I- 500 D- 30 Loop Gain- 50 I changed to: P-200 I- 750 D- 30 Loop Gain- 60 Both the GGS are at 1% Droop Mode. After this change, the GGs starting syncing at 40KW and...

Right...

Hello Gentlemen! Thank you for all of the wonderful inputs you give. Update time! So we explored a lot of things during our troubleshooting and in the end reached to below solution: The CAT Gensets have Voltage and Frequency Knobs on the engine controller. These knobs are sometimes used by FM...

I am in contact with BRUSH Electric on this. I will update the when I get to something conclusive soon. -Mutahir