ABB REF 541 Product Manual page 45

Feeder Terminal
Functionality levels, protection functions
ANSI IEC Function
Code Symbol
59N-3 Uo >>> Residual overvoltage,
instantaneous stage
OVERLOAD
49F 3Ith> Three-phase thermal
overload (feeders & cables)
OVER / UNDERVOLTAGE
59-1 3U > Three-phase overvoltage,
low-set stage
59-2 3U >> Three-phase overvoltage,
high-set stage
27-1 3U < Three-phase undervoltage,
low-set stage
27-2 3U << Three-phase undervoltage,
high-set stage
REF 541, REF 543, REF 545.
FUNCTIONALITY LEVELS
Code REF541/3/5 REF541/3/5
CONTROL BASIC
ROV1Inst
TOL3Cab
OV3Low
OV3High
UV3Low
UV3High
1MRS750443-MBG
REF541/3/5
MULTI
X X
X X
X
X
X
X
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