Recent content by alagan85

  1. alagan85

    GE Frame-5 Gas turbine Ratcheting system Hydraulic pressure low Problem

    Dear WTF? , Thank you for your valuable information, I got some usefull information from your post to rectify this issue. Our ratcheting system working but hydraulic pressure low, after some time disenagage, so i analysed with fluid flow diagram, Ratcheting system working but system is not...
  2. alagan85

    GE Frame-5 Gas turbine Ratcheting system Hydraulic pressure low Problem

    We are facing a problem with the GE Frame-5 Gas turbine on ratcheting system. When the ratchet starts, it runs every three minutes without an alarm, but on the third cycle, the ending time, the ratchet clutch is disengaging and reengaging frequently. The following have been checked. We...
  3. alagan85

    Master Protective Relay (4R, 4S, 4T) not active During startup

    Thank you
  4. alagan85

    Master Protective Relay (4R, 4S, 4T) not active During startup

    Dear Engineer, Thank you for your support. Problem has been resolved.:love: May I mistake during MARK-IV startup. I followed by below steps. 1. <C> core started wait until healthy. 2. <R> core started wait until healthy. 3. <S> core started wait until healthy. 4. <T> core started wait...
  5. alagan85

    Master Protective Relay (4R, 4S, 4T) not active During startup

    Dear Engineer, Thank you for your great support, Once start command given, the turbine is running crank mode normal condition without any alarm, after turbine speed reach Fire mode, then Gas trip pressure low alarm appear, after that hydraulic pressure low, then tripped. During running I saw...
  6. alagan85

    Master Protective Relay (4R, 4S, 4T) not active During startup

    Mr. MWO. Thank you for your sharing you knowledge. P28VR is a redundant source of 28V, There i mentioned 28VDC is a positive checked with Ground. We assumed the PCOM getting from RDM (Relay driver module) is correct ( i checked with another working relay PCOM getting from RDM). You may see the...
  7. alagan85

    Master Protective Relay (4R, 4S, 4T) not active During startup

    Hi, Thank you in advance. I am facing an issue MARK -IV Control system. During electrical breaker modification work time, we shut down the Mark-IV panel for 1 month after we restarted MARK-IV. During GT trail startup, the gas turbine was tripped due to 20FG (Gas trip oil solenoid valve) is...
  8. alagan85

    How to Replace VSVO H1B card in GE Mark VI

    Reason for changing VSVO card, During Gas turbine startup time GCV not following reference alarm and tripped. I checked all servo coil voltage and found one coil there is no voltage. Found <R> core VSVO card voltage not received. For confirmation I exchanged VSVO card from <T> core to <R> core...
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