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Hello everyone, This will be reply 77! I am afraid of sending a message without too much clear details and directly linked to the problem. WHAT IS THE NULL BIAS CURRENT VALUE FOR SVO5? Photo Faulty turbine WHAT IS THE SERVO CURRENT GAIN FOR SVO5? Photo Faulty turbine I also sent the photos of...

Hi I have tried to collect as much information as possible to best answer your questions. From the history I was able to obtain: 1) Did you perform a servo-valve polarity check after you reconnected the coils? Yes. 2) Any mechanical work been done around IGV ? Yes, Major inspection. The...

Hello everyone I have reread the last messages and I want to correct some confusions: I did not obtain authorization from my hierarchy to start the turbine for testing. The turbine has the permissive to start. 90TV has been connected for several years, without resistance, exactly as follows...

Hi WTF it's true it's a mess. This is the first time that I have been responsible for working on this turbine and little by little I am discovering the situation and the anomalies. I'm sorry for the time you spent here, but your help was very helpful and I'm happy to have resolved the issues...

Hello! and thank you for the help, I tried in vain to get the turbine to start and run under load. So, we had no start after replacing the cards... (last start-up since one month). As I have already said, these turbines serve as backup to the network and therefore they are rarely called upon at...

Hello everyone, I lately had impediments to work on the Mark V. The processor <S> no longer reboot by itself. The problem has been resolved by replacing TCPS. The <T> processor correctly votes all inputs, even SVL and SFL2. We found the JDT plug of TCTG Loc 4 <P> reversed. Currently we only...

Hi everyone, First I will answer your questions: 1- Yes, we have good grounding in the power plant which was checked and renewed about 3 years ago. 2- Yes, alarms can be locked. 3- The machine has not been started, synchronized and loaded. We only opened or shunted certain input contacts...

Thanks for the help. I'm sorry WTF for having delayed replacing the cards (I haven't forgotten), but you know, replacing so many new cards from the store then the problem doesn't resolve and ultimately finding the fault in a cable or a supply voltage... We formatted the EEPROM of <T>, restarted...

hello every one, For the CPD of processor <R> the problem is solved : We found JH TCQC not plugged in, the plug was behind the processor and not visible. After connecting JH, we injected pressure into the 96cd-1 and <R> displays the same value as <S> and <T>. We did : EEPROM DOWNLOADER>DOWN T1...

1- Checking continuity and insulation of the <S> power cable: J1 TCPS <S> ------ J1S TCPD <PD>: OK Cleaning and pluging/unpluging several times, to eliminate possible oxidation or bad contacts, for the connections on <S>: 2PL, JC, 3PL. 2- jumpers check: TCQC Loc.4 <T>: BJ17 is different...

Hello everyone, sorry for being late. I always try to gather as much information as possible on the multiple problems on this Mark V in order to be able to intervene with a minimum of manipulation and/or replacement of cards. Turbine stopped and L4PRET at "1" , we have: C R S T L3ACS 1...

The jumpers of TBAB <R> are identical to those of other Mark V (Only BJ1; BJ2; BJ3 and BJ4 are done). I think that since the CPD signal connects to terminals 1,2,3 and 4 of TBQB and arrives at <S> and <T> the TBQB card is healthy and I must check beyond JHR. The three Mark V are the same (type...

Hi there, I have to inform you that we have only one CPD transducer (96CD-1 connected to <R> TBQB Screw num 1- 2 -3 and 4). We made the Mark V out of power supply and cleaned all the connectors (for all the Mark V). After restoring power to the Mark V, we had the following messages: For <S>: 6...

Hi there, I confirm <R>'s vote for CPD, it's not a typing error. We only have ARCNET BNC connectors that are already cleaned and checked with termination resistors. Yesterday we had a trip identical to the previous ones (HMI TMOS was disconnected). Attached is the IO.ASG file.

Thanks WTF? and White for your help which is very useful. We have no other communications, in particular MODBUS. No external system communicating with <I> and Mark v. The TMOS HMI communicates with three Mark V. We have three Mark v on the stage link. The TMOS HMI is still disconnected from the...

I checked the voter ID on each processor's LCC display and found: For <C> : Voter ID (C) -- For <R> : Voter ID (R) -- For <S> : Voter ID (S) -- For <T> : Voter ID (T) -- I will prepare a list of the signals of <T> for which the vote is different from that of <R> and <S> when the...

1- We only have QD1 and no QD2. We only have <C> and not <D>. 2- We have TCPD in <PD> with switches. 3- The tripping issue began after replacing the TCPS card of <S> due to a 125 Vdc ground fault. The <T> voting issue is older, and I am not aware of the circumstances under which it occurred. We...

thanks WTF? and White for your patience and help. Finally I will send to you the alarms photos. I also inform you that the turbine worked yesterday without tripping, which means that the cleaning of the connectors gave results. It remains to be confirmed during the following starts. Regarding...

Hey everyone, it's been a hard day Before reading your messages I give you the news: Yesterday, after tripping, we restarted without TMOS SCADA (disconnected) and the turbine worked without tripping for almost 5 hours and it was just before giving the stop order that it tripped in the same...

The processor <S> is mounted at A7, the same for the I/O state, without intervention on our part. I think we have a fleeting connection problem and when this happens and with the problem of <T> the turbine trips.