ABB RET 541 Product Manual page 56

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56
Transformer Terminal
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Fig. 11 Transformer in block connection with a generator. The transformer terminal RET 543 is used for
overall differential protection. An earthing resistor is recommended for the generator. The REX 521
protection relay is used for abnormal voltage and frequency supervision and protection of the net-
work and the machine.
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RET 541, RET 543, RET 545
1MRS755543