ABB RET 541 Product Manual page 55

Transformer Terminal
Q
Q
Fig. 10
D
D
Protection, control, measurement and supervision functions of an Yyn-connected industrial power
transformer, implemented with RET 543 transformer terminals, an REF 543 feeder terminal, an
REX 521 protection relay and REA 101 arc protection. The neutral point of the low-voltage network
is earthed via a high resistance.
RET 541, RET 543, RET 545
1MRS755543
55