PNI - Load Break Switching & Fault Interrupting

G&W Electric model PNI 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 38kV, 900A load break and continuous current, with 12.5kA – 25kA symmetrical fault interrupting ratings. The PNI is one of G&W Electric’s most versatile switch style because it can be ordered with front accessible switch operators and bushings (front access) as well as front accessible switch operators with rear entry bushings (front/ rear access).

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.

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Features and Benefits

Configurations Chart for PNI Front & Rear Access
# of WaysOne-line Diagram (Horizontal)Voltage Class (kV)Catalog Number
Approximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
4
15PNI20-376-12-4L47.5 (1207)1500 (682)
25PNI20-386-12-4L
35PNI20-396-12-4L
6
15PNI32-376-12-6L62.5 (1588)1920 (873)
25PNI32-386-12-6L
35PNI32-396-12-6L
7
15PNI31-376-12-7L62.5 (1588)2050 (932)
25PNI31-386-12-7L
35PNI31-396-12-7L
9
15PNI42-376-12-9L77.5 (1969)2300 (1045)
25PNI42-386-12-9L
35PNI42-396-12-9L
11
15PNI43-376-12-11L77.5 (1969)2400 (1091)
25PNI43-386-12-11L
35PNI43-396-12-11L
12
15PNI41-376-12-12L77.5 (1969)2400 (1091)
25PNI41-386-12-12L
35PNI41-396-12-12L
51
15PNI51-376-12-51L92.5 (2350)2900 (1318)
25PNI51-386-12-51L
35PNI51-396-12-51L
52
15PNI52-376-12-52L92.5 (2350)2800 (1273)
25PNI52-386-12-52L
35PNI52-396-12-52L
53
15PNI53-376-12-53L92.5 (2350)2750 (1250)
25PNI53-386-12-53L
35PNI53-396-12-53L
54
15PNI54-376-12-54L92.5 (2350)2650 (1205)
25PNI54-386-12-54L
35PNI54-396-12-53L
62
15PNI62-376-12-62L107.5 (2731)3300 (1500)
25PNI62-386-12-62L
35PNI62-396-12-62L
63
15PNI63-376-12--63L107.5 (2731)3200 (1455)
25PNI63-386-12-63L
35PNI63-396-12-63L
64
15PNI64-376-12-64L107.5 (2731)3100 (1409)
25PNI64-386-12-64L
35PNI64-396-12-64L
65
15PNI65-376-12-65L107.5 (2731)3000 (1364)
25PNI65-386-12-65L
35PNI65-396-12-65L
72
15PNI72-376-12-72L104.3 (2648)3850 (1750)
25PNI72-386-12-72L
35PNI72-396-12-72L
Approximate Height: 65" (1651mm), Approximate Depth = 55" (1397mm)
Bushing Height: 48" (1224mm)
Configurations Chart for VPNI
ModelOne-line Diagram (Horizontal)Voltage Class (kV)Catalog Number
Approximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
4F
15VPNI20-376-25-4F43 (1092)1050 (477)
25VPNI20-386-25-4F
35VPNI20-396-12-4F
5F
15VPNI21-376-25-5F43 (1092)1100 (500)
25VPNI21-386-25-5F
35VPNI21-396-12-5F
6F
15VPNI32-376-25-6F58 (1473)1300 (591)
25VPNI32-386-25-6F
35VPNI32-396-12-6F
7F
15VPNI31-376-25-7F58 (1473)1400 (636)
25VPNI31-386-25-7F
35VPNI31-396-12-7F
9F
15VPNI42-376-25-9F73 (1854)1550 (705)
25VPNI42-386-25-9F
35VPNI42-396-12-9F
11F
15VPNI43-376-25-11F73 (1854)1650 (750)
25VPNI43-386-25-11F
35VPNI43-396-12-11F
12F
15VPNI41-376-25-12F73 (1854)1650 (750)
25VPNI41-386-25-12F
35VPNI41-396-12-12F
43F
15VPNI43-376-25-43F-BT88 (2235)1850 (839)
25VPNI43-386-25-43F-BT
35VPNI43-396-12-43F-BT
51F
15VPNI51-376-25-51F88 (2235)2000 (909)
25VPNI51-386-25-51F
35VPNI51-396-12-51F
52F
15VPNI52-376-25-52F88 (2235)1900 (864)
25VPNI52-386-25-52F
35VPNI52-396-12-52F
53F
15VPNI53-376-25-53F88 (2235)1850 (839)
25VPNI53-386-25-53F
35VPNI53-396-12-53F
54F
15VPNI54-376-25-54F88 (2235)1800 (818)
25VPNI54-386-25-54F
35VPNI54-396-12-53F
62F
15VPNI62-376-25-62F103 (2616)2300 (1403)
25VPNI62-386-25-62F
35VPNI62-396-12-62F
63F
15VPNI63-376-25-63F103 (2616)2200 (998)
25VPNI63-386-25-63F
35VPNI63-396-12-63F
64F
15VPNI64-376-25-64F103 (2616)2100 (955)
25VPNI64-386-25-64F
35VPNI64-396-12-64F
65F
15VPNI65-376-25-65F103 (2616)2000 (907)
25VPNI65-386-25-65F
35VPNI65-396-12-65F
72F
15VPNI72-376-25-72F118 (2997)2600 (1182)
25VPNI72-386-25-72F
35VPNI72-396-12-72F
Approximate Height: 38" (965mm), Approximate Depth = 27" (686mm)
Ratings Chart for PNI Front Access
Voltage class15kV25kV35kV
Maximum design voltage15.5kV27kV38kV
Impulse level (BIL)110kV125kV150kV
One minute withstand35 AC kV60 AC kV70 AC kV
One minute withstand, production test rating34 AC kV40 AC kV50 AC kV
15 minute withstand53 DC kV78 DC kV103 DC kV
** Continuous and load break current630 Amps630 Amps630 Amps
Load Break Switch Momentary current40kA asym40kA asym40kA asym
Load Break Switch Fault close current, (3 times)40kA asym40kA asym40kA asym
Load Break Switch One second current25kA sym25kA sym25kA sym
Fault Interrupter Symmetrical interrupting rating12.5kA*12.5kA*12.5kA*
Load Break Switch Open gap withstand200kV200kV200kV
Load Break Switch 10 operation overload interrupting capability3000 Amps3000 Amps3000 Amps
Load Break Switch Operations load interrupting endurance at 600A120012001200
Mechanical endurance, operations200020002000
IEEE C37.60 Fault Interrupting Duty
Total number of fault interruptions: 116
Percent of Maximum Interrupting RatingNo. of Fault Interruptions
15 – 20%44
45 – 55%56
90 – 100%16
*25kA interrupting rating is available
** Available at 900Amps
Ratings Chart for PNI Front & Rear Access
Voltage class15kV25kV35kV
Maximum design voltage15.5kV27kV38kV
Impulse level (BIL)110kV125kV150kV
One minute withstand35AC kV60AC kV70AC kV
One minute withstand, production test rating34AC kV40AC kV50AC kV
15 minute withstand53DC kV78DC kV103DC kV
** Continuous and load break current630 Amps630 Amps630 Amps
Load Break Switch Momentary current40kA asym40kA asym40kA asym
Load Break Switch Fault close current, (3 times)40kA asym40kA asym40kA asym
Load Break Switch One second current25kA sym25kA sym25kA sym
Fault Interrupter Symmetrical interrupting rating12.5kA*12.5kA*12.5kA*
Load Break Switch Open gap withstand200kV200kV200kV
Load Break Switch 10 operation overload interrupting capability3000 Amps3000 Amps3000 Amps
Load Break Switch Operations load interrupting endurance at 600A120012001200
Mechanical endurance, operations200020002000
IEEE C37.60 Fault Interrupting Duty
Total number of fault interruptions: 116
Percent of Maximum Interrupting RatingNo. of Fault Interruptions
15 – 20%44
45 – 55%56
90 – 100%16
*25kA interrupting rating is available
** Available at 900Amps
Ratings Chart for VPNI
Voltage Class15kV25kV35kV
Maximum design voltage15.5kV27kV38kV
Impulse level (BIL)110kV125kV150kV
One minute withstand35 AC kV60 AC kV70 AC kV
One minute withstand, production test rating34 AC kV40 AC kV50 AC kV
15 minute withstand53 DC kV78 DC kV103 DC kV
Continuous and load break current630 Amps630 Amps630 Amps
Load Break Switch Momentary current40kA asym40kA asym40kA asym
Load Break Switch Fault close current, (3 times)40kA asym40kA asym40kA asym
Load Break Switch One second current25kA sym25kA sym25kA sym
Fault Interrupter Symmetrical interrupting rating 25kA25kA12.5kA*
Load Break Switch Open gap withstand200kV200kV200kV
Load Break Switch 10 operation overload interrupting capability3000 Amps3000 Amps3000 Amps
Load Break Switch Operations load interrupting endurance at 600A120012001200
Mechanical endurance, operations200020002000
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
*25kA interrupting rating is available

For Accessories and additional options see full catalog.

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