FT8 Control System – P&W FT8 / Solar Turbines Technical BLOG

P235 – FT8 Backup overspeed TACHPAK 30 – Caution

Donald Murphy — Wed, 24 Apr 2024 14:27:25 +0000

FT8 Backup overspeed TACHPAK 30 – Caution

Donald Murphy — Wed, 24 Apr 2024 14:12:34 +0000

ARTICLE REF – ART235

This is the older version backup overspeed monitor which is still in service but no longer being used in new production. It has been replaced by the TACHPAK 30 which is a two channel overspeed monitor. The TACHPAK 3 has a single channel and monitors either ST008A or ST008B. In a Swiftpak it does not matter which speed sensor is connected, as both Power Turbine A and B rotate at the same speed. Ther danger is if you have the coupling out of side B due to maintenance for example and the monitor is connected to ST008B!

On the left you see the wiring for the sensors. At position 51 you have wire U14-720, which means the wire can be found on Unit Control Electrical Schematics Page 14, Line 72. The other two wires belonging to that sensor are in position 52 and 53. The signals comes in from the left and leaves on the right of the terminal stip.

The speed sensor from the turbine comes in at 54, 55 and 56, but they are not connected to wires leaving on the right. It is here that you must move the output wires from the output 51, 52 and 53 to 54, 55 and 56 if that is the side in service.

To be sure inject a signal close to the speed sensor on the side that is in service and ensure your overspeed trips, so you know the wiring is correct.

P178 – FT8 – Vibration Trip Multiply

Donald Murphy — Mon, 22 Apr 2024 14:50:17 +0000

This article has important reference information on vibration trip multiply on the FT8.

P201 – Corrected Speed

Donald Murphy — Sat, 20 Apr 2024 16:16:16 +0000

Training video explaining the use of Corrected Speed as used in turbine control systems.

P228 – FT8 Lube System – Control & Alarms

Donald Murphy — Fri, 19 Apr 2024 18:09:51 +0000

FT8 Lube Oil System - Control & Alarms - Part 2. This article looks at the oil tank instruments and control of same.

P214 – FT8 Control System Training

Donald Murphy — Fri, 19 Apr 2024 18:07:03 +0000

FT8 Lube System – Control & Alarms

Donald Murphy — Sun, 28 Jan 2024 14:15:57 +0000

FT8 Lube Oil System - Control & Alarms - Part 2. This article looks at the oil tank instruments and control of same.

FT8 Control System Training

Donald Murphy — Wed, 04 Oct 2023 22:36:08 +0000

Corrected Speed

Donald Murphy — Thu, 25 May 2023 19:17:37 +0000

Training video explaining the use of Corrected Speed as used in turbine control systems.

FT8 – Alternative method of finding the MODBUS address

Donald Murphy — Wed, 25 Jan 2023 15:09:06 +0000

Alternative method of finding the MODBUS address on FT8