Petronas Penapisan Melaka’s 3 nos. of Mitsubishi Heavy Industries steam turbines were equipped with the old style Woodward 505. These old Woodward 505 controllers has been in operation since the installation of the plant and they are now obsolete.
The old 505 were single controllers with no redundancy. Neither were there any independent overspeed protection. The new system designed, installed and commissioned by ACS are the Woodward 505R which are configured for redundant operation and ProTech GII overspeed protection to enhance the turbine safety.
The challenge in this project was there isn’t enough space in the control room and we didn’t have the luxury to install additional cabinets as Petronas Melaka wanted to retain the existing enclosure to house the extra 505R controllers and Protech GII in it.
The old panels were removed and replaced with the new adapter panels with Woodward redundant 505 and Protech GII turbine overspeed protection control.