公开(公告)号：EP3745433A1

公开(公告)日：2020-12-02

申请号：EP19177280.5

申请日：2019-05-29

Applicant: ABB Schweiz AG

Inventor： Bianco, Andrea ,  Ricci, Andrea ,  Lindell, Elisabeth ,  Halén, Stefan ,  Mannino, Fabio

IPC: H01H3/26 ,  H01H11/00 ,  H01H71/00

Abstract: The invention relates to a control unit (7) for a medium voltage switching apparatus (1).
The control unit is characterised in that said control unit (7) is adapted to carry out a diagnostic method (100) to check operating conditions of one or more components of said electric poles (2).
The diagnostic method (100) comprises the following steps:
- basing on a selected ideal position curve (C IP ), obtaining (101) one or more first curves (C Iv , C IT ) indicative of an ideal behaviour of said switching apparatus, during an opening manoeuvre or closing manoeuvre of the switching apparatus;
- basing on detection signals (P F , v F , T F ) provided by a closed-loop control arrangement (72) of said control unit, calculating (102) one or more second curves (C Av , C AT ) indicative of an actual behaviour of said switching apparatus, during an opening manoeuvre or closing manoeuvre of said switching apparatus;
- carrying out (103) a comparison procedure (150) among said first and second curves (C Iv , C IT , C Av , C AT ).

公开(公告)号：EP3023998B1

公开(公告)日：2018-05-02

申请号：EP14194288.8

申请日：2014-11-21

Applicant: ABB Schweiz AG

Inventor： Doser, Bernhard ,  Dubach, Peter ,  Greuter, Felix ,  Lindell, Elisabeth ,  Liljestrand, Lars

IPC: H01C7/12

CPC classification number: H01C7/12 ,  H01C1/02

Abstract: A multi-terminal surge arrester (10) is proposed, which comprises an active part (12) extending along a longitudinal direction (14) of the surge arrester (10), a first electrode (20) resting against a first end (18) of the active part (12), and a second electrode (24) resting against a second end (22) of the active part (12), which second end (22) opposes the first end (18) in the longitudinal direction (14) of the surge arrester (10). The surge arrester (10) further comprises an insulating fixing device (26) mechanically connecting and fixing the first electrode (20) and the second electrode (24), and an insulating housing (38) arranged around the active part (12). The active part (12) comprises at least two metal-oxide based varistor elements (34) and a further electrode (40, 40a, 40b) arranged between the at least two varistor elements (34), which further electrode (40, 40a, 40b) provides an externally accessible electrical connection. Therein, the surge arrester (10) is adapted for being insulated by surrounding air.