
Feeder Terminal
REF 541, REF 543, REF 545.
1MRS750443-MBG
45
59N-3
Uo >>>
Residual overvoltage,
instantaneous stage
ROV1Inst
X
X
OVERLOAD
49F
3Ith>
Three-phase thermal
overload (feeders & cables)
TOL3Cab
X
X
OVER / UNDERVOLTAGE
59-1
3U >
Three-phase overvoltage,
low-set stage
OV3Low
X
59-2
3U >>
Three-phase overvoltage,
high-set stage
OV3High
X
27-1
3U <
Three-phase undervoltage,
low-set stage
UV3Low
X
27-2
3U <<
Three-phase undervoltage,
high-set stage
UV3High
X
Functionality levels, protection functions
FUNCTIONALITY LEVELS
ANSI
Code
IEC
Symbol
Function
Code
REF541/3/5
CONTROL
REF541/3/5
BASIC
REF541/3/5
MULTI