Functional testing of digital substations with optical instrument transformers

2020 ◽  
Author(s):  
A.P. Apostolov
Keyword(s):  
Functional Testing ◽  
Optical Instrument ◽  
Instrument Transformers

Development of optical instrument transformers

1990 ◽  
Vol 5 (2) ◽  
pp. 884-891 ◽  
Author(s):  
T. Sawa ◽  
K. Kurosawa ◽  
T. Kaminishi ◽  
T. Yokota
Keyword(s):  
Optical Instrument ◽  
Instrument Transformers

Solid insulation drying of 110 kV paper-oil instrument transformers

2009 ◽  
Vol 25 (25) ◽  
pp. 35-38 ◽  
Author(s):  
Gerards Gavrilovs ◽  
Sandra Vītoliņa
Keyword(s):  
Temperature Regulation ◽  
Drying Method ◽  
Instrument Transformers ◽  
Conventional Drying ◽  
Solid Insulation

Solid insulation drying of 110 kV paper-oil instrument transformersInfluence of moisture on the instrument transformers' paper-oil insulation and its further maintenance is described in this paper. Improved insulation drying method using vacuum and temperature regulation with definite regulation algorithm of parameters is proposed and analyzed by comparing it with conventional drying method.

ALLOY 48

Alloy Digest ◽  
1975 ◽  
Vol 24 (6) ◽  
Keyword(s):  
Iron Alloy ◽  
Heat Treating ◽  
Magnetic Core ◽  
High Permeability ◽  
Nickel Iron ◽  
Core Losses ◽  
Instrument Transformers ◽  
Nickel Iron Alloy ◽  
Shielding Material ◽  
Communication Equipment

Abstract ALLOY 48 is a vacuum-melted, 48% nickel-iron alloy designed for high permeability, and low core losses. It is ideal in applications requiring efficient magnetic core materials, such as audio and instrument transformers, instrument relays, and many other communication equipment devices. It is excellent for rotor and stator laminations, and is also a very effective magnetic shielding material. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-52. Producer or source: Magnetics Specialty Metals Division. See also Alloy Digest Fe-96, April 1992.

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