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Main terminal boxes of MV generators

Main terminal boxes of MV generators

The Main Terminal Boxes are used to conduct electrical power to the main current conductors and to create a star point on the opposite side of the generator stators windings. Typically, the cabinets contain measuring current transformers and voltage transformers to protect the generator. They may also include overvoltage protection of generator, optionally with protective capacitors, or a partial discharge measurement system of the generator windings. The cabinets are adapted to the generator design, project by project. It can be one common cabinet for the power output and the star point - MTB & N, or it can be divided spatially into two cabinets MTB part (power output) and N part (star point).

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Technical information

Rated voltage: 3 – 25 kV
Rated current: 50 – 12 000 A
Rated shorttime current 1s (3s): 50 – 150 kA
Rated dynamic current: 125 – 375 kA
Rated frequency: 50 Hz (16 Hz, 60 Hz)
Generator rated power: up to 150 MVA
Minimum lifetime (years): 40
Connection, generator side: NSBD conductor, cabels
Connection, line side: NSBD conductor, SPB conductor, cabels, busbars
Cabinet material: normal steel, non-magnetic steel
Maximum ambient temperature: up to +60°C

360 Model

Main terminal boxes of MV generators
Main terminal boxes of MV generators
Generator Switchgear MV, indoor design, primary distribution
Generator Switchgear MV, indoor design, primary distribution
Generator Switchgear MV, outdoor design, primary distribution
Generator Switchgear MV, outdoor design, primary distribution
Transient switchgears, interconnection cabinets
Transient switchgears, interconnection cabinets
MV Switchgears, secondary distribution
MV Switchgears, secondary distribution
Steel-sheet cabinet for general indoor use
Steel-sheet cabinet for general indoor use