MAS S.A has both the background and the skilled team to retrofit automatic voltage regulators (AVR) and excitation systems for turbines and engines.

Many installed automatic voltage regulators (AVR) are at the stage in their product lifecycle when spares and support are no longer available. This component failure can result in loss of a generator.

We avoid this risk by offering proactive help with obsolete AVRs and excitation systems to prevent loss of power generation. MAS S.A has developed a range of retrofit and upgrade solutions, which focus on common obsolescence failure modes.

At MAS S.A we provide lifecycle support and retrofit services for your generator set to enhance reliability and reduce downtime. Our engineering team retrofits singular AVR systems as well as automatic voltage regulators which belong to larger engineered control systems found in various land and marine applications.

Discover some of our work

Compressor station retrofit A Gas compressor station of a Middle East customer, comprised of 2 x RR AVON GTs with Dresser Rand Compressors. The units were over 20 years old and had reliability problems. Operators often faced unexplained trips but also faced difficulty in mainlining process operational levels. Back-up / Peak power plants MAS is not only known for its advanced solutions in prime power plants. The company has a long history in systems regarding backup or peak shaving plants. Hydroelectric power plant. Upgrade of National Primary Frequency Control System for Hydro-Electric Stations The new system provides increased speed and accuracy of each hydro unit while ensuring completely unattended safe operation. Steam turbine retrofit Agios Georgios is the only Power Plant located close to the capital of Greece, Athens. It is an old thermal plant with an installed base of 2 x 250MW LMZ steam turbine unit. After an upgrade of the boiler from diesel fuel to Natural Gas, the Public Power Corporation (PPC) hoped to be able to... PPC Gavdos Plant Upgrade Description unavailable Oil & Gas No matter what type of prime mover is driving your generator - be it steam/ gas turbine or a gas/ diesel reciprocating engine, MAS SA designs products to control speed, fuel, exhaust emissions and manage load that are tailored for your specific prime mover.

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or give us a call at (+30) 210 401 4000