R200 range for SHUNT excitation: simplicity itself
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Single-phase voltage sensing
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Underspeed protection by U/f (R220) or U/f and LAM (R250) function
R400 range for SHUNT, PMG and AREP excitation types: performance
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Single-phase voltage sensing
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Excitation ceiling setting
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Underspeed protection by U/f and LAM function
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Parallel operation between alternators with CT
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Parallel operation with the mains with CT and R726 module
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Three-phase sensing in R450T version or with R731 module
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Overload protection with R450 version
