8/11/2019 Overview of HV Switchgear

1/36

Overview of HV Switchgear

8/11/2019 Overview of HV Switchgear

2/36

8/11/2019 Overview of HV Switchgear

3/36

8/11/2019 Overview of HV Switchgear

4/36

8/11/2019 Overview of HV Switchgear

5/36

TypesTypes

8/11/2019 Overview of HV Switchgear

6/36

8/11/2019 Overview of HV Switchgear

7/36

GapGapmmmm

SpeedSpeedm/sm/s

12KV12KVVCBVCB

66--88 1.51.5

3333 1616 --2020 1.81.8

145145 6060 --9090 2.52.5

220220 145 +145 + 3.53.5

8/11/2019 Overview of HV Switchgear

8/36

8/11/2019 Overview of HV Switchgear

9/36

8/11/2019 Overview of HV Switchgear

10/36

8/11/2019 Overview of HV Switchgear

11/36

8/11/2019 Overview of HV Switchgear

12/36

8/11/2019 Overview of HV Switchgear

13/36

Air,oil,SF 6

Breaker

8/11/2019 Overview of HV Switchgear

14/36

Fault MVA = 3 x V L x IL

VL= Line voltage

IL = Line current

Contactseparation

8/11/2019 Overview of HV Switchgear

15/36

8/11/2019 Overview of HV Switchgear

16/36

T ( s)

UThermal

recovery zone

Dielectricrecovery zone

8/11/2019 Overview of HV Switchgear

17/36

420 kV SF6 CB Withpneumatic Mechanism

8/11/2019 Overview of HV Switchgear

18/36

8/11/2019 Overview of HV Switchgear

19/36

8/11/2019 Overview of HV Switchgear

20/36

8/11/2019 Overview of HV Switchgear

21/36

8/11/2019 Overview of HV Switchgear

22/36

8/11/2019 Overview of HV Switchgear

23/36

8/11/2019 Overview of HV Switchgear

24/36

8/11/2019 Overview of HV Switchgear

25/36

8/11/2019 Overview of HV Switchgear

26/36

8/11/2019 Overview of HV Switchgear

27/36

8/11/2019 Overview of HV Switchgear

28/36

8/11/2019 Overview of HV Switchgear

29/36

8/11/2019 Overview of HV Switchgear

30/36

8/11/2019 Overview of HV Switchgear

31/36

8/11/2019 Overview of HV Switchgear

32/36

Rated Rated Short

8/11/2019 Overview of HV Switchgear

33/36

36 812.5162540

630630630 12501250

12501250

160016001600 25002500

72.5 12.5162031.5

800800

125012501250

1600

1600

2000

2000123 12.5

202540

800 125012501250 16001600

1600

200020002000

145 12.5202531.540

800 1250125012501250

1600160016001600

2000200020002000

3150

RatedVoltage

(kV)

Rated ShortCircuit

Breaking current(kA)

Rated normal current (Amp)

8/11/2019 Overview of HV Switchgear

34/36

245 2031.540

12501250 1600

160020002000 3150

420 31.5405063

16001600

200020002000

3150

31503150 40004000

800 40 2000 3150

RatedVoltag

e(kV)

Rated Short CircuitBreaking current

(kA)Rated normal current (Amp)

8/11/2019 Overview of HV Switchgear

35/36

S & A

8/11/2019 Overview of HV Switchgear

36/36

Symmetry & Asymmetry

Steady Operation -no asymmetry Switch On V peak - No asymmetry