ZERO-SEQUENCE CURRENT GENERATOR Russian patent published in 2008 - IPC H02H7/26 H02H3/16 

FIELD: revealing of ground closing in a network with an insulated neutral.

SUBSTANCE: the device has zero-sequence current filters connected to the circuit of each connection, zero-sequence voltage filter connected to the collecting buses, device (generator) for producing the zero-sequence current connected to the collecting buses via a switch controlled by a monitoring and control module, accomplishing a short-time closing of the mentioned switch in case the actuation threshold is exceeded, and connected to the zero-sequence voltage filter, and a delay line is introduced in the monitoring and control module. The zero-sequence current generator has a reactor with a three-legged unsaturated magnetic core and star-connected windings with a grounded common point (neutral).

EFFECT: simplified construction, enhanced speed of response and reliability, reduced overall dimensions and mass, provided optimal configuration, enhanced safety of servicing.

6 cl, 3 dwg