Switches combine linear puffer style load break switching with electronically controlled, vacuum interrupter overcurrent protection in a deadfront, submersible device. All operating apparatus and cable entrances are front accessible permitting installation in confined areas. Source side puffer switching incorporates a visible break of all three phases.
Load break switch (LP) ratings
Maximum design voltage
15.5 kV
27 kV
38 kV
Voltage class
15 kV
25 kV
35 kV
Impulse level (BIL)
110 kV
125 kV
150 kV
One minute withstand
35 AC kV
60 AC kV
70 AC kV
One minute withstand, production test rating
34 AC kV
40 AC kV
50 AC kV
15 minute withstand
53 DC kV
78 DC kV
103 AC kV
Continuous and load break current
630 Amps
630 AC kV
Momentary current
40 kA asym
Fault close current, (3 times)
One second current
25 kA sym
Open gap withstand
200 kV
10 operation overload interrupting capability
3000 Amps
Operations load interrupting at 600A
1200
1200 Amps
Mechanical endurance, operations
2000
2000 Amps
Fault Interrupter (VI) ratings
95 kV
One minute withstand, Production test rating
103 DC kV
Symmetrical interrupting rating
12 kA
IEEE C37.60 Fault Interrupting Duty Total number of fault interruptions: 116
Percent of Maximum Interrupting Rating
Approx. Interrupting Current, Amps
No. of Fault Interruptions
15 – 20%
2,000
44
45 – 55%
6,000
56
90 – 100%
12,000
16
