GB 6450-1986
Replaced
T/SEAMTA 000004-2020
Active
Group standards
T/SEAMTA 000004-2020 GIS with isolation device voltage transformer
T/SEAMTA 000004-2020 GIS with isolation device voltage transformer
Price:
$ 20.00
Basic Information
Standard Code:
T/SEAMTA 000004-2020
Standard Type:
Group standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Transformer
ICS Name:
Transformers, reactors, and inductors
Publish Date:
2020-05-25
Implement Date:
2020-06-01
Scope
Main technical content: Voltage transformers with isolation devices are typically used in 40.5 kV to 252 kV GIS systems, and they come in single-phase and three-phase versions. By operating the internal movable contacts with an external mechanism, the primary winding can be connected or disconnected from the high-voltage terminal. The normal operating state of voltage transformers with isolation devices is when the isolation device is in the closed position. In this state, the product's function is equivalent to that of a traditional electromagnetic voltage transformer used in GIS systems. The isolation device does not have an arc-extinguishing function, and the opening and closing operations can only be performed when the main circuit is not energized.
Development Information
Related Standards
GB/T 7449-1987
Replaced
GB/T 7449-1987 Guide to the lightning impulse and switching impulse testing of power transformers and reactors
GB 13028-1991
Abolished
GB 13028-1991 Isolating transformers and safety isolating transformers Requirements
GB/T 14006-1992
Active
GB/T 14006-1992 Outline dimensions of transformers and inductors for use in telecommunication and electronic equipment—Part 1:Transformers and inductors using YEI-1 laminations
GB/T 14860-1993
Replaced
GB/T 14860-1993 Generic specification for transformers and inductors for use in telecommunication and electronic equipment
GB/T 15164-1994
Replaced