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Djafer, What other Diagnostic- and Process Alarms were present and active at the time the trip occurred? Did anyone check the wiring of the primary- (77NH-n) and emergency (77HT-n) speed pick-ups along the ENTIRE circuit between the Mark VI TTUR and TREG terminal boards and the speed...

mhwest, This being a new year, I would like to propose that people with procedures like this post them to the controlwiki webpage of control.com. One of my few New Year's resolutions is to make better use of this repository, and make reference to it instead of referring people to use the...

chiru, The documentation for the Mark VIe is actually pretty good. If you can put together your own instruction set from the manuals and post it here, I'm sure someone will review it and make comments if necessary.

Ebrahim Golidari, I have always thought this would be an excellent application for fuzzy logic. However, I am unusually busy these next few months. I have zero free time for the next two-to-three months and a lot of travel scheduled for the next five months. Thank you for asking and I...

laqeel, So, you DIDN'T mention if you've checked the IONET BNC connectors for evidence of corrosion. Sometimes all it takes is a cotton swab wetted with some electrical contact cleaner used to "swish" around the connectors to get rid of corrosion (which may only appear as a slightly darker...

Maybe this will help.... One of the best ways to understand the I/O connected to the Mark V is to obtain a copy of the I/O Report. It is an ASCII text file located in the F:\UNIT1 directory named TC2KREPT.TXT. A printed copy is best, but it is a document that is formatted for landscape...

Let's just say the OEM has basically dropped support for the Mark V, including most training. There are a couple of third-party training course providers, but really only one (that I'm aware of) that actually has a Mark V to give hands-on training with. One of the things that happens in...

VJ/vijaycontrol, Tell us what have you learned from studying the P&IDs? Have you read the System Descriptions in the Operations & Service Manuals provided with the turbine and auxiliaries? There are individual sections which correspond to each of the P&IDs. The turbine control system...

matrix2016 & alaqeel, Neither of you has told what troubleshooting was done and what the results of the troubleshooting were. It would seem the problem lies with the <S> IONET; it could be the termination resistors, or, as is common, just simply corrosion oc thew BNC connectors (sometimes...

If you're having a generator terminal overvoltage condition, then it would be most likely there is something amiss with the SVR (Static Voltage Regulator), or the terminal voltage feedback (from the generator PTs (Potential Transformers)), or the overvoltage relay itself. Many times during...

Perhaps I didn't understand the original question(s). So let's give this another try. When you contact potential suppliers for a new (upgrade; retrofit) excitation system they are going to ask you for a LOT of information. They will ask for the existing excitation systems's nameplate...

Hello, There are LOTS of manufacturers that can meet most, if not all, of the technical requirements for a particular piece of equipment. And since excitation systems ("AVRs") are not all that complicated (unless you get in to some very large systems with the requirement for Power System...

Aptx4869, By convention when l52qv1a is a logic "1" it indicates the motor #1 L.O. Mist Eliminator motor starter contactor is closed and providing power (380 VAC, or 440 VAC or 480 VAC, depending on which part of the world the unit is located) to the #1 L.O. Mist Eliminator Motor terminals...

Isulamu, I see a LOT of people who get hung up on some minor detail and it prevents them from being able to learn anything else (yes; until they get their one question answered to their satisfaction (even if it's impossible to answer the question with a satisfactory answer because of...

Amjad Ali, In my experience compound wound DC motors are not uncommon in Emergency L.O. Pump motor applications. So, I'm curious as to why it's so important to solving this problem? In my experience, the overload relay ONLY monitors the current flowing in the armature circuit, and there is...

Hello, Guy, In my experience, any such guideline or restriction is imposed site-by-site based on their experience using mobile (cell) phones in control- and rack rooms. And, what does the manufacturer/supplier of the fire system equipment say about this potential for problem? Also in my...

>So, what have you done to investigate this matter? To add to this, what is the power output of the steam turbine now? Are you taking the data at the same conditions (inlet steam temperature; inlet steam pressure; load; valve rack position)? What is the valve rack position (actual...

isulamu, I want to ask if you're doing any studying of ToolboxST and how to use the various features to troubleshoot and understand how the turbine will operate or operates--so that you can document the changes from what was in the Mark II? Understanding hardware is good; don't get me...

[NOTE: The use of $ for spelling $IS/$IL is my own convention, and is, in my own personal opinion, a more accurate description of the estimation and calculation functionality of the equipment you are paying extra for.] I'm no expert on this topic ($IS or $IL), but I can tell you this much for...

Please learn to use the P&IDs provided with the turbine and auxiliaries. By looking at the P&IDs for the unit, probably the Liquid Fuel Purge P&ID, you will clearly see that if the liquid fuel purge check valve(s) are leaking in the reverse flow direction that liquid fuel will be allowed to...