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Seismically Certified SPRAM


G&W model SPRAM pad mount 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 and 900A 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.  The switches are designed per the guidelines of ASCE (American Society of Civil Engineers) standard 7-05 Chapter 13.  These guidelines cover the design of non structural components installed in a building.  The switches also underwent a test regime specified by ICC-ES-AC-156 (International Code Council Evaluation Services Acceptance Criteria) which specifies the shaker table test inputs applied to the switches.

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 and 900A continuous and load break ratings
  • Seismically certified
  • Certified for use in OSHPD (Office of Statewide Health Planning and Development) projects for healthcare facilities in the State of California. The OSHPD application number on file is OSP-0157-10

 

Voltage Class (kV)

15

25

35

Maximum design voltage (kV)

15.5

27

38

BIL Impulse (kV)

110

125

150

1 Min Withstand AC (kV)

35

60

70

1 Min Withstand Production test rating AC (kV)

34

40

50

15 Min Withstand DC (kV)

53

78

103

Continuous and load break 

current (A)

900

900

630

Momentary
Current (kA) asym

40

40

40

Fault-Close 3-times (kA) asym

40

40

40

1 Sec Current (kA) sym

25

25

25

Open gap 

withstand (kV)

200

200

200

10 operation overload

 interrupting capability (A)

3000

3000

3000

Operations load interrupting 

endurance at 600A

1200

1200

1200

Mechanical 

Operations

2000

2000

2000

 



 
 
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