11-5-1-2-1-proverka-obmotki-vozbuzhdeniya-rotora.html
11.5.1.2.1. Check of a winding of excitement of a rotorIf the winding has no short-circuited rounds, then its resistance has to be 3,7±0,2 Ohms at a temperature of 20 °C.
At measurement it is necessary to watch reliability of contact between rings of a rotor and the conductors attached to them.
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