Recent content by borrellimd

Now that you have found the inlet air temp and humidity sensor, how will you access them? These are about 30 feet up, man lift won't fit, working from a ladder is dangerous, and they require periodic maintenance (i.e. wiping the mirror.) I failed in my fight to get a ladder/platform installed...

Thanks for the follow up and info! I ‘lovingly’ refer to them (and myself) as dinosaurs, 60s, 70s, and 80s vintage beasts that we are... We have spent many cold winter nights together, fishing through diagrams, chicken scratches on the wall, and tracing down cables and faults. I sometimes wake...

Thanks for all the input! This is a GE Frame 6b. After reaching out here and other groups and contacts, we obtained ‘similar’ layout drawings and we lifted enough covers to locate the HV cables, bushings, and neutral grounding area. The covers are on the floor at the end of the generator for...

This is exactly the idea but I don't have ethernet in the area:

Hi, Thanks for the response. Both applications are adding to existing installation. Both under 1000 feet and have 4-20ma running there now. I want to add IO to each location. I can use 1 of the twisted shielded cables to run communication and link the 2 locations. 1 location only has 1 twisted...

Is there a way to copy a trend from one unit to another? Or a way to export and modify in excel?

We do 2 tests without actually overspeeding the turbine. The first is for the Primary Overspeed system. We reduce the overspeed trip constant, start the unit. While the unit has flame and ramping, it trips at 25%. This proves the the trip will close gas valves. The second is to the Emergency...

We have seen faulty thermocouple, cables, cable connector ends/crimps, and terminations in the J box and in the Turbine Control Panel cause the same errors. Sometimes it is hard to identify the exact cause and we have had to replace parts and solve by process of elimination. But, the...

I may have added some confusion, I do that... The screen readings (TTXD1_nn) read lower than the input by 20 Deg F (at 1000.) I wrote that they were low by approximately (~) 20 Deg F, not negative (-) 20 Deg F. They were exactly 20 Deg F low, or .98 of the input (of 1000.) Yes, using the...

Just to share a bit more detail: There are differences in software (and hardware) between the 2 units. GT1 has the GE Opflex software with autotune, dynamics, and model based Ares software. The temperature coefficient, tkxcoef, is .9775. GT2, the unit I initially experienced the difference in...

It turns out that we were taking the readings from the HMI screen. There is a .98 coefficient from the input to the screen. The inputs were reading exactly 1000 Deg F and the screen was reading 980 Deg F. I did learn more about my system, how the cards are arranged, where to find some...

CSA, your reply does help. Thank you for all the support! There are no diagnostics on the MVRA (or in the Mark6e at all- which is nice.) This issue was discovered as part of scheduled testing. Unfortunately there is no known history of this check in the past so this may have been an issue...