Patent ID: 11972913
Assignee: HITACHI ENERGY LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 16:
17. A method for indicating a state of a disconnector device, the disconnector device being connectable to pole-mounted equipment in a power distribution or transmission grid, and the disconnector device being configured to be activated in case of an overload condition, thereby disconnecting the pole-mounted equipment, wherein the disconnector device comprises at least one passive radio device to be enabled via an incoming radio signal, and the state being one of an activated state and a deactivated state of the disconnector device, the method comprising:
enabling the passive radio device;
when the disconnector device is in at least one of the states, transmitting, via the passive radio device, an indicator signal indicative of the respective state of the disconnector device; and
effecting, upon an activation of the disconnector device, a relative movement between an activation interactor and the passive radio device, thus changing the frequency characteristic of the passive radio device.