Solid Dielectric Ratings for the Unit/System Voltage

Trayer Solid Dielectric Ratings for the Unit/System Voltage

Nominal Voltage (Series)

15kV

25kV

 Maximum Design Voltage

15.5kV

27kV

Device

Load Break
Switch

Vacuum Fault
Interrupter

Load Break
Switch

Vacuum Fault
Interrupter

BIL Phase-to-Phase, Phase-to-Ground

110kV

110kV

110kV

110kV

125kV

125kV

125kV

125kV

BIL Across Open Contacts

110kV

110kV

110kV

110kV

125kV

125kV

125kV

125kV

One Minute Withstand (60Hz)

34kV

34kV

34kV

34kV

40kV

40kV

40kV

40kV

Continuous Current

630A

630A

630A

630A

630A

630A

630A

630A

Load Switching

630A

630A

630A

630A

630A

630A

630A

630A

Peak Current

41.6kA

52kA

41.6kA

52kA

41.6kA

52kA

41.6kA

52kA

Load Break Operations at Full Load

10,000

10,000

10,000

8,000

10,000

10,000

8,000

8,000

Maximum Emergency  Three-Time
Interrupting

2000A

2000A

N/A

N/A

2000A

2000A

N/A

N/A

Number of Fault Interruptions at 16kA

N/A

N/A

65

65

N/A

N/A

65

65

Short-time Withstand Current (1s), Short Circuit Current, and Fault-making Current 600A Symmetrical

16kA

20kA

16kA

20kA

16kA

20kA

16kA

20kA

Short-time Withstand Current (1s), Short Circuit Current, and Fault-making Current 600A Asymmetrical

25.6kA

32kA

25.6kA

32kA

25.6kA

32kA

25.6kA

32kA