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Is there any logic that Steam Turbine Manufacturers sometimes use indirect signal like Pressure Switch/Pressure Transmitter for Equipment running feedback? The operators are in the blind condition when the PS/PT not in resetting condition to know which equipment is running?

Hi all, Is there any logic behind to use 60 sec Time delay to get the start permissive after a normal shutdown of a MV motor?

Hi, Can anyone please explain about the subject matter with reference documents for GE or other Manufacturers Gas Turbine Generator? Apart from that "Is Power Factor control mode not normally recommended for large capacity generator??" Regards, RU

Hello folks, Can anyone share the experience of working with GE OPM & APM? We are going to implement them for our project. We were familiar with OSM but the OPM-PI and APM are our new to us. If anyone has some information/case studies, please share. Thank you in advance. Regards.

Dear all, We are operating two GE-9E machines with dual fuel combustion facility(non-DLN burner; standard burner).These machines have been operated for seven years.Schedule maintenance(CI,HGPI) also carried out regularly. One of our unit recently experiencing high differential temperature alarm...

Our plant consists of two GE-9E machines,two HRSGs and one ST. The GE-9E machines each with rated load 117900 KW at 32°C, 80% RH and 1013 mbar (atm). The nominal frequency is 50Hz. For grid stability the transmission company now emphasize to run the plant on FGMO (Free Governor Mode of...

We have two GE-9E machines. Recently we are changing fuel from HSD to Natural gas. Both the machines have the standard combustion with water injection facility for NOx control. When we run the machines in temperature control mode OFF condition i.e. in Simple cycle mode the maximum load range...

Our Plant consists of Two GE Frame-9E GTs, Two Vertical HRSGs (Manufacturer: HBG, China) one Steam Turbine (HTC, China). GT Rated Capacity: 115MW @ site conditions; 1013 mbarg, 32 degC, 85%RH HRSG Rating: HP Steam -75.6 barg/505 degC/182.9 t/hr LP Steam-6.3 barg/259.4 degC/36.8...

Is there any relationship between steam pressure at the outlet of Boiler & steam pressure before steam turbine control valve & or stop valve?

Hello, Could you please explain the details about the function of PFR ON & PFR OFF in MarVIe? Another question, How to calculate TIT (Turbine inlet Temperature)? Regards, Rokan

When two of our GE-9E gas turbines were commissioned we observed that time for both GT after a shutdown the ventilation fan for Turbine compartment (88BT) was running for compartment cooling as well as Turbine casing cooling. The fan was stop after certain time period and again start after 15...

We have two 9E dual fuel gas turbines.Both the machines were in standstill condition for 12 to 14 hours and maximum wheelspace temperature were 33 degC for each machine before going to standstill. We made the Turning System of both GT normal and put them into turning after 14hours. But GE T/A...

In MarkVIe ToolboxST it is seen that in PAIC-1A4A card the variables Name is OUTsuicide1, the Direction is Input, the Data Type is BOOL and the Description is "Status of Suicide Relay for Output1". My question is what does Suicide Relay mean and what is its functions?

Hi All I need some basic information about Siemens V94.2 GT's exhaust temperature measurement. There are six thermocouples at the exit of the turbine to measure exhaust temperature. Group one MBA22CT012..13..14 and group two MBA22CT016..17..18. The turbine has two silo type combustion...

Hi guys, I am facing problem with Krone Summit8800 NG flow meter. The range for pressure transmitter is 200 psig (max.). But the line pressure is 202~205 psig. The feedback of transmitter to flow computer is OK i.e. it shows the exact value. But while print the data sheet (measurement of...

We are doing online compressor blade washing of Ansaldo-Siemens V94.2 machine on weekly basis. The procedure for online washing is supplied by Ansaldo where we need to put the IGV control motor selection switch in Manual position from Auto before start washing provided that IGV is full...

It is quite difficult task for me to find out the efficiency of a motor driven high pressure boiler feed waster pump. It might not be relevant for this forum. but if anybody of this forum, engage in Power Plant operations & maintenance, have any idea please inform me how to calculate the...

Can anyone please explain for me Why LV winding is placed inside HV winding in a transformer?

We have a 450MW CCPP with 2CT+2HRSG+1ST. For condenser cooling we have two cooling water pump (CWP) having 29000 m3/hr capacity each. When one CWP trips due to bearing vibration/temp or winding temp the condenser water box outlet valves close automatically. The valves are in auto mode. Our I&E...

Hi All Can anybody illustrate for me in details how to calculate condenser make up? We have a flow transmitter at make up water line to condenser which gives the reading of condenser make up at any time. But on daily (24 hr basis) consumption how does the calculation execute? I hope you...