What is the protective function of generator transverse differential?

[AaliyahRose]

The protective function of generator transverse differential is mainly used to protect the stator inter-turn short circuit of the generator, or for situations where the generator neutral point has six lead-out terminals. It can also provide protection when an asymmetric short circuit fault occurs inside the generator. The transverse differential protection is a protection that reflects the inter-turn short circuit of one phase of the generator stator winding and the inter-turn short circuit between two associated branches of the same phase. The transverse differential protection belongs to the generator inter-turn short circuit protection. Large-capacity generators are generally composed of two parallel windings. Under normal conditions, the potentials of the two windings are equal, each supplying half of the load current. If an inter-turn short circuit occurs in any winding, the potentials of the two windings will no longer be equal, resulting in a potential difference that generates circulating current between the two windings.