ABB REF 543 Product Guide

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

ABB REF 543 Specifications

General

Brand	ABB
Model	REF 543
Category	Touch terminals
Language	English