Instrument Transformer

Abstract: The present invention relates to an instrument transformer of a type designed for using an insulation medium containing SFe, said instrument transformer comprising a housing enclosing an insulation space and further comprising an electrical active part arranged in the insulation space, said insulation space containing a dielectric insulation medium. The instrument transformer is characterized in that the dielectric insulation medium contains a gaseous mixture comprising from 3 to 5 mol-% of heptafluoroisobutyronitrile, from 4 to 11 mol-% of oxygen (O2) and from 84 to 93 mol-% of nitrogen (N2).

Patent Information

Application #

Filing Date

26 October 2023

Publication Number

50/2023

Publication Type

INA

Invention Field

ELECTRICAL

Status

Email

Parent Application

Applicants

HITACHI ENERGY LTD

Brown-Boveri-Strasse 5 8050 Zürich

Inventors

1. CALAMARI, Matteo

Via Confalonieri, 8 29020 Vigolzone

2. GATZSCHE, Michael

Zelgstrasse 11 8003 Zürich

3. NAEF, Manuel

Rankwaldweg 8 8645 Rapperswil-Jona

4. CLAESSENS, Max-Steffen

Weinbergstrasse 29 5417 Untersiggenthal

5. STRAUMANN, Ulrich

Rychenbergstrasse 255 8404 Winterthur

6. ERRICO, Ennio

Via Piave 7 24050 Bariano

Specification

Documents

Application Documents

#	Name	Date
1	202347072808-STATEMENT OF UNDERTAKING (FORM 3) [26-10-2023(online)].pdf	2023-10-26
2	202347072808-PROOF OF RIGHT [26-10-2023(online)].pdf	2023-10-26
3	202347072808-PRIORITY DOCUMENTS [26-10-2023(online)].pdf	2023-10-26
4	202347072808-FORM 18 [26-10-2023(online)].pdf	2023-10-26
5	202347072808-FORM 1 [26-10-2023(online)].pdf	2023-10-26
6	202347072808-DRAWINGS [26-10-2023(online)].pdf	2023-10-26
7	202347072808-DECLARATION OF INVENTORSHIP (FORM 5) [26-10-2023(online)].pdf	2023-10-26
8	202347072808-COMPLETE SPECIFICATION [26-10-2023(online)].pdf	2023-10-26
9	202347072808-FORM-26 [10-11-2023(online)].pdf	2023-11-10
10	202347072808-FORM 3 [26-02-2024(online)].pdf	2024-02-26