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Gas Insulated Switchgear
LPFI – Load Break Switching & Fault Interrupting

LPFI - Load Break Switching & Fault Interrupting

G&W Electric model LPFI padmount switches include load break and fault interrupting capability. The fault interrupters provide electronically controlled, resettable over current protection in a totally sealed, dead front device. The switches are designed for use on 3-phase systems with voltages up to 27kV, 630A load break, and continuous current, and 12.5kA symmetrical fault interrupting ratings. They feature compact footprints due to their front access construction.

The switches are designed to IEEE C37.72, C37.74, and C37.60 for load break and fault interrupting capability. Padmount enclosures are designed and tested to IEEE C57.12.28 and C57.12.29.

Features and Benefits

  • Construction – Available compact construction with front accessible switch operators and bushings. Vault construction is also available with top or bottom bushings or top access to operators and bushings.
  • Visible Break – Load break ways are equipped with visible break to view the open and closed positions.
  • Fault Interrupting – Three phase fault interrupting up to 12.5kA with selectable industry curves including fuse emulation curves.
  • Voltage Sensing – Load break ways are available with integral voltage sensing for use with voltage indication panel to determine in-phase condition or for use with a relay with up to 1% accuracy.
  • Automation – Available for motor automation with portable or permanently mounted motor and controls. A variety of relays such as SEL, ABB, and GE are available with G&W Electric programming and cabinet construction. Cabinets can be ordered in a low voltage enclosure for padmount, pedestal or IP68 rated submersible for vault installed switchgear. Programming for automatic source transfer, or LaZer custom solutions are available.
Configurations Chart for LPFI

# of WaysOne-line Diagram (Horizontal)Voltage Class (kV)Catalog Number
Approximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
4F
15PFI20-376-12-4F38.2 (969)1200 (545)
25PFI20-386-12-4F
5F
15RPFI21-376-12-5F38.2 (969)1200 (545)
25RPFI21-386-12-5F
6F
15RPFI32-376-12-6F50.1 (1274)1500 (681)
25RPFI32-386-12-6F
7F
15RPFI31-376-12-7F50.1 (1274)1500 (681)
25RPFI31-386-12-7F
9F
15RPFI42-376-12-9F62.1 (1578)1800 (871)
25RPFI42-386-12-9F
11F
15RPFI43-376-12-11F62.1 (1578)1800 (871)
25RPFI43-386-12-11F
12F
center>
15RPFI41-376-12-12F62.1 (1578)1800 (871)
25RPFI41-386-12-12F
43F
15RPFI43-376-12-43F74.1 (1883)2100 (953)
25RPFI43-386-12-43F74.2 (1885)2250 (1023)
51F
15RPFI51-376-12-51F74.1 (1883)2300 (1044)
25RPFI51-386-12-51F74.2 (1885)2250 (1023)
52F
15RPFI52-376-12-52F74.1 (1883)2100 (953)
25RPFI52-386-12-52F
53F
15RPFI53-376-12-53F74.1 (1883)2100 (953)
25RPFI53-386-12-53F
54F
15RPFI54-376-12-54F74.1 (1883)2000 (908)
25RPFI54-386-12-54F
62F
15RPFI62-376-12-62F86.1 (2188)2400 (1089)
25RPFI62-386-12-62F
63F
15RPFI63-376-12-63F86.1 (2188)2400 (1089)
25RPFI63-386-12-63F
64F
15RPFI64-376-12-64F86.1 (2188)2300 (1044)
25RPFI64-386-12-64F
65F
15RPFI65-376-12-65F86.1 (2188)2300 (1044)
25RPFI65-386-12-65F
72F15RPFI72-376-12-72F98.1 (2493)2500 (1136)
25RPFI72-386-12-72F
Approximate Height: 59" (1499mm), Approximate Depth = 49" (1245mm)


Configuration Chart for VLPFI

ModelOne-line Diagram (Horizontal)Voltage Class (kV)Catalog Number
Approximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
4F
15VPFI20-376-25-4F38.1 (969)800 (363)
25VPFI20-386-25-4F
5F
15VRPFI21-376-12-5F32 (813)800 (363)
25VRPFI21-386-12-5F
6F
15VRPFI32-376-12-6F44 (1118)1000 (454)
25VRPFI32-386-12-6F
7F
15VRPFI31-376-12-7F44 (1118)1100 (499)
25VRPFI31-386-12-7F
9F
15VRPFI42-376-12-9F56 (1422)1200 (545)
25VRPFI42-386-12-9F
11F
15VRPFI43-376-12-11F56 (1422)1200 (545)
25VRPFI43-386-12-11F
12F
15VRPFI41-376-12-12F56 (1422)1200 (545)
25VRPFI41-386-12-12F
43F
15VRPFI43-376-12-43F68 (1727)1450 (658)
25VRPFI43-386-12-43F
51F
15VRPFI51-376-12-51F68 (1727)1650 (749)
25VRPFI51-386-12-51F
52F
15VRPFI52-376-12-52F68 (1727)1450 (658)
25VRPFI52-386-12-52F
53F
15VRPFI53-376-12-53F68 (1727)1450 (658)
25VRPFI53-386-12-53F
54F
15VRPFI54-376-12-54F68 (1727)1350 (613)
25VRPFI54-386-12-54F
62F
15VRPFI62-376-12-62F80 (2032)1650 (749)
25VRPFI62-386-12-62F
63F
15VRPFI63-376-12-63F80 (2032)1650 (749)
25VRPFI63-386-12-63F
64F
15VRPFI64-376-12-64F80 (2032)1550 (704)
25VRPFI64-386-12-64F
65F
15VRPFI65-376-12-65F80 (2032)1550 (704)
25VRPFI65-386-12-65F
72F
15VRPFI72-376-12-72F92 (2337)1500 (682)
25VRPFI72-386-12-72F
Approximate Height: 29.5" (749mm), Approximate Depth = 22.4" (569mm)
Ratings Chart for LPFI and VLPFI

Voltage Class15kV25kV
Maximum design voltage15.5kV27kV
Voltage class15kV25kV
Impulse level (BIL)110kV125kV
One minute withstand35AC kV60AC kV
One minute withstand, production test rating34AC kV40AC kV
15 minute withstand53DC kV78DC kV
Continuous and load break current630 Amps630 Amps
Momentary current25.6kA asym20kA asym
Fault close current, (3 times)25.6kA asym20kA asym
One second short circuit current16kA asym12.5kA asym
Fault Interrupter Symmetrical interrupting rating12.5kA12.5kA
Operations load interrupting endurance (15kV) at 600A500350
Mechanical endurance, operations20002000
IEEE C37.60 Fault Interrupting Duty
Total number of fault interruptions: 116
Percent of Maximum Interrupting RatingApprox. Interrupting Current, AmpsNo. of Fault Interruptions
15 – 20%2,00044
45 – 55%6,00056
90 – 100%12,50016
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