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It's almost impossible to analyse a trip without being able to personally examine a copy of the Alarm Logger printout from the trip. Speedtronic turbine control systems can annunciate several different trip conditions when a turbine is tripped, as the list provided shows, but it's critical to...

An LVDT is a device which can be applied to many different types of valves, actuators, etc. with many different ranges of travel ("stroke"). An LVDT has a range of operation ("stroke") over which it's output is linear and proportional to the stroke of the device to which it is attached. And...

It would sound as if there's something amiss with the null bias current value(s) for PM1? What is the actual physical position of the valve with respect to LVDT feedback? I am <b>not</b> a fan of the null bias calculation procedure in the control Specification. I've seen it cause more trouble...

I don't know the answer. I would imagine the information is both proprietary and unit-specific.

Try contacting CSE Engineering, Inc. (www.cse-eng-inc.com, or www.itc-info.us). I believe they have some experience with Mark IV remote operator interfaces.

Mechanical binding/sticking?

This is great information, Ronald B. Can you provide us with the name of the new solenoid's manufacturer and the part number, please? I'm somewhat concerned because I believe the solenoid the originator is referring to is a black cylinder, about 30 cm (12 inches) tall, about 7.5 cm (3...

Did you record any as-found conditions, or are these the as-found conditions? Did you, or based on the as-found conditions do you, feel it necessary to re-calibrate LVDT position feedback? Valve position feedback calibration changes can impact emissions, since fuel splits are converted to...

If you look at a Mark V turbine control panel, you will see there is no ARCnet network interface card like is necessary for an IBM-compatible PC. All of the necessary ARCnet-based communication and protocol requirements are already in the Mark V <C> core. The StageLink coaxial cable plugs into a...

1. The types of ARCnet cards used in GE Mark V HMIs (and other vendors' offerings) are available in the open market from the manufacturer for spares and replacements. You don't need to buy a proprietary card from the HMI vendor, though the HMI vendors will likely have them for sale for a long...

Why does heating feed water improve performance of a boiler? Because it takes less fuel to heat the water to the same temperature. I believe that's one of the reasons for heating gas fuel. Injecting relatively cold gas fuel into a combustor has to have something of a quenching effect on the...

maint makes a good point. Typically, the firing timer is set for 30 to 60 seconds, during which time the ignitors (spark plugs) are kept continually energized just in case there are low or intermittent fuel flows there is continuous spark available in the two cans with ignitors for duration of...

Flickering flame indication after establishment of flame is typically caused by low fuel flow-rate when the Speedtronic cuts back to warm-up FSR after flame is detected. Firing FSR is higher than warm-up FSR, precisely to help establish flame. And once flame is detected, the fuel is cut back to...

Have the failures occurred on the same units? Or have they occurred on different units? In other words, have multiple failures of the 20FG-1 solenoid occurred on one or a limited number of units, or have five of the six units each experienced their own failures? The typical cause of failure...

> We discussed with GE regarding the ARCNET card, whether it to be replaced or not, the said that the existing ARCnet [not ARCnet card] will be used and they will upgrade the some PROM's. < You have answered your own question. The StageLink, which is the proper term for the ARCnet-style LAN...

Effectively, the Mark VIe I/O capacity is unlimited because of the architecture that's used to connect the I/O cards to the microprocessors. I'm sure there is some limit, because of memory considerations in the microprocessor, but GE will say the capacity is "virtually" unlimited. (Sometimes...

You really haven't given us much useful information as an HMI is not necessarily an HMI when referring to Mark V Speedtronic turbine control systems. And I don't know what an <HMI> is (unless it's new term for an <I> we've never seen here at control.com). If you have an <I> operator interface...

What kind of operator interface do you have? <I>? HMI? These kinds of things can be done in sequencing and they can also be done on the operator interface with mathematical operations. You're going to have to find out how it was done at your site. It's just an indication (likely) and won't...

Your management is probably responding to the end-of-life letter that GE has sent out about the Mark V. The availability of spare cards and parts from GE is about to come to an end. And a lot of companies will not do business with third-party card providers for a variety of reasons regardless of...

You should have some kind of manual provided with the exciter regulator (AVR) which has some description of the PSS (Power System Stabilizer). Have you tried using an Internet search engine to look for any information on PSSs? A Google search yielded this as the first result...