On-load tap-changer head and on-load tap-changer with on-load tap-changer head

摘要

An on-load tap-changer head (20) for an on-load tap-changer (10) comprises - a first portion (21) formed in the on-load tap-changer head (20) through which an insulating fluid (17) of the on-load tap changer (10) can flow; - a second region (23) separated from the first region (21) by a wall (22); - A detector device (39) for detecting increased flow velocity of the insulating fluid (17), comprising • a flow flap (24) which is arranged in the first region (21) and from a fixed flow rate of the insulating fluid (17) from a first position (24A ) works in a second position (24B); A first coupling magnet (25) fixed to the flap (24) and located in the second position (24B) of the flow flap (24) in close proximity to the wall (22); A second coupling magnet (26) disposed in the immediate vicinity of the wall (22) in the second region (23); A switch (27), which is arranged in the second region (23) and is coupled to the second coupling magnet (26) such that the folding over of the flow flap (24) from the first position (24A) to the second position (24B ) operates the switch (27).