HIGS Generator Circuit-Breaker Switchgear

Highly integrated, for indoor and outdoor installation

Description

The highly integrated generator switchgear (HIGS) is specially developed generator breaker switchgear for Siemens industrial turbines SGT-600 to SGT-800, as well as for steam turbines SST-400 to SST-600 in the power range up to 55 MW. It can be adapted to the requirements of other types of gas and steam turbines.
The switchgear is directly connected to the generator and combines the conventional generator terminal box with the functionality of a generator switchgear. This enables the reduction of interfaces and space requirements. It is also possible to implement the neutral point connection and an auxiliary feeder.

Technical Data

Ratings

HIGS2400

HIGS3200

Rated voltage Ur

kV

12/15

12

Rated frequency

Hz

50
60

50

Rated normal current Ir @ IP54

A

2400

3200

Rated normal current Ir @ IP42

A

2650

3700

Rated lightning impulse withstand voltage
50 Hz
60 Hz

kV


75
95


75
-

Rated lightning impulse withstand voltage across the isolating distance Ud
50 Hz
60 Hz

kV


28
38


28
-

Rated duration of short circuit tk

s

3

3

Rated short circuit breaking current Isc

kA

50

50

Breaker Types

3AH3817-7 (17.5kV - 3,150A - 50kA) / 3AH3817-8 (17.5kV - 4,000A - 50kA)

Switchgear Design

IEC

Dimensions

4340 x 1200 x 2500 mm ( W x D x  H )

Connection method

Directly installed at the generator terminals

Connection to generator step up transformer with cables or busbars from top or bottom

Installation

Indoor or outdoor

Degree of Protection

IP42, IP54


Features and Benefits

  • Replaces conventional generator connection box

  • Indoor and outdoor installation

  • Integrated neutral point treatment

  • Integrated aux transformer feeder, optionally