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SPRAM


G&W model SPRAM padmount switches feature load break switching capability in a totally sealed, dead front device. The switches are designed for use on 3-phase systems with voltages up to 38kV, 630A load break and continuous current, and 40kA asymmetrical momentary and close into fault ratings. They feature compact footprints due to their front access construction.

The switches are designed to IEEE C37.72 and C37.74 for load break capability. Padmount enclosures are designed and tested to IEEE C57.12.28 and C57.12.29. 

Features:
  • Padmount installation
  • Compact construction with front accessible switch operators and bushings
  • 15.5kV -38kV with 40kA asymmetrical momentary and close into fault ratings
  • 630A load break ratings

 

SPRAM 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 DC kV

Continuous and load break current

630 Amps

630 Amps

630 Amps

Momentary current

40 kA asym

40 kA asym

40 kA asym

Fault-close current,
(3 times)

40 kA asym

40 kA asym

40 kA asym

One second current

25 kA sym

25 kA sym

25 kA sym

Open gap withstand

200 kV

200 kV

200 kV

10 operation overload interrupting capability

3000 Amps

3000 Amps

3000 Amps

Operations load interrupting at 600a

1200

1200

1200

Mechanical endurance, operations

2000

2000

2000

 



 
 
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