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Gas Insulated Switchgear
TVI – Load Break Switching with Integral Ground and Fault Interrupting

TVI - Load Break Switching with Integral Ground and Fault Interrupting

G&W Electric model TVI padmount switches include load break and fault interrupting capability. The load break switch features visible break and integral ground position. The integral ground position eliminates the need to handle any high voltage connections to ground the cable connected to the load break ways. The fault interrupters provide electronically controlled, resettable over current protection in a totally sealed, dead front device. The TVI can be configured to provide 1-phase or 3-phase operation of the fault interrupting ways. The switches are designed for use on 3-phase systems with voltages up to 38kV, 630A load break, and continuous current, with 12.5kA or 20kA symmetrical fault interrupting ratings. The TVI is one of G&W Electric’s most versatile switch styles because it can be ordered with front accessible switch operators and bushings (front access) as well as front and back access to replace existing pad mount air gear installations

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 with front accessible switch operators and bushings or with front and back operators and bushings for replacement of existing pad mount air or oil insulated equipment. 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 – Single or three phase fault interrupting up to 20kA with selectable industry curves including fuse emulation curves. Operating handles can be configured for single or three phase manual operation.
  • Ground Position – Integral ground position on load break ways to eliminate the need to handle high voltage components to ground the cable.
  • 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 TVI Front Access

# of WaysOne-line Diagram (Horizontal)Voltage Class (kV)Catalog Number
Approximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
6F
15TVI32-376-12-6F67.9 (1725)1700 (773)
25TVI32-386-12-6F71 (1803)1550 (705)
35TVI32-396-12-6F80 (2032)1350 (612)
9F
15TVI42-376-12-9F92 (2337)2200 (1000)
25TVI42-386-12-9F
35TVI42-396-12-9F112 (2845)2400 (1090)
52F
15TVI52-376-12-52F113 (2870)2450 (1112)
25TVI52-386-12-52F
35TVI52-396-12-52F143 (3632)2850 (1294)
62F
15TVI62-376-12-62F134(3404)2700 (1226)
25TVI62-386-12-62F
35TVI62-396-12-62F173 (4394)3400 (1544)

Configurations Chart for TVI Front & Rear Access

# of WaysOne-line Diagram (Horizontal)Voltage Class (kV)Catalog Number
Approximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
5
15TVI21-376-12-544.5 (1130)850 (432)
25TVI21-386-12-5
35TVI21-396-12-5
6
15TVI32-376-12-674 (1880)1799 (773)
25TVI32-386-12-6
35TVI32-396-12-6
7
15TVI31-376-12-774 (1880)2000 (909)
25TVI31-386-12-7
35TVI31-396-12-7
8
15TVI41-376-12-874 (1880)2300 (1045)
25TVI41-386-12-8
35TVI41-396-12-8
9
15TVI42-376-12-974 (1880)2300 (1045)
25TVI42-386-12-9
35TVI42-396-12-9
10
15TVI44-376-40-1074 (1880)2200 (1000)
25TVI44-386-40-10
35TVI44-396-40-10
11
15TVI43-376-12-1174 (1880)2200 (1000)
25TVI43-386-12-11
35TVI43-396-12-11
12
15TVI41-376-12-1274 (1880)2400 (1091)
25TVI41-386-12-12
35TVI41-396-12-12
13
15T33-376-40-1374 (1880)2000 (908)
25T33-386-40-13
35T33-396-40-13
14
15TVI42-376-12-1474 (1880)2000 (908)
25TVI42-386-12-14
35TVI42-396-12-14

Configurations Chart for VTVI Front Access

# of WaysOne-line Diagram (Horizontal)Voltage Class (kV)Catalog Number
Approximate
Width* in. (mm)Wt. w/SF6 lbs (kg)
6F
15VTVI32-376-12-6F72 (1829)1300 (590)
25VTVI32-386-12-6F1425 (648)
35VTVI32-396-12-6F81 (2057)1525 (693)
9F
15VTVI42-376-12-9F93 (2362)1700 (771)
25VTVI42-386-12-9F
35VTVI42-396-12-9F102 (2591)
52F
15VTVI52-376-12-52F114 (2896)1825 (830)
25VTVI52-386-12-52F
35VTVI52-396-12-52F123 (3124)2000 (909)
62F
15VTVI62-376-12-62F135 (3429)2025 (920)
25VTVI62-386-12-62F
35VTVI62-396-12-62F144 (3658)2500 (1136)
Approximate height of tank minus frame: 29" (737mm), Approximate depth: 32.4 (823mm)
Ratings Chart for TVI Front Access

Voltage Class15kV25kV35kV
Maximum design voltage15.5kV27kV38kV
Impulse level (BIL)110kV125kV150kV
One minute withstand35 AC kV60 AC kV70kV
One minute withstand, production test rating34 AC kV40 AC kV50kV
15 minute withstand53 DC kV78 DC kV103kV
Continuous and load break current630 Amps630 Amps630 Amps
Momentary current40kA asym40kA asym40kA asym
Fault close current, (3 times)32kA asym32kA asym32kA asym
One second current25kA asym25kA asym25kA asym
Fault interrupting ratings12kA or 20kA sym12kA or 20kA sym12kA or 20kA sym
Mechanical endurance, operations200020002000
EEE 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
Ratings Chart for TVI Front & Rear Access
Voltage Class15kV25kV35kV
Maximum design voltage15.5kV27kV38kV
Impulse level (BIL)110kV125kV150kV
One minute withstand35 AC kV60 AC kV70kV
One minute withstand, production test rating34 AC kV40 AC kV50kV
15 minute withstand53 DC kV78 DC kV103kV
Continuous and load break current630 Amps630 Amps630 Amps
Momentary current40kA asym40kA asym40kA asym
Fault close current, (3 times)32kA asym32kA asym32kA asym
One second current25kA asym25kA asym25kA asym
Fault interrupting ratings12kA or 20kA sym12kA or 20kA sym12kA or 20kA sym
Mechanical endurance, operations200020002000
EEE 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
Ratings Chart for VTVI Front Access
Voltage Class15kV25kV35kV
Maximum design voltage15.5kV27kV38kV
Impulse level (BIL)110kV125kV150kV
One minute withstand35 AC kV60 AC kV70 kV
One minute withstand, production test rating34 AC kV40 AC kV50 kV
15 minute withstand53 DC kV78 DC kV103 kV
Continuous and load break current630 Amps630 Amps630 Amps
Momentary current40kA asym40kA asym40kA asym
Fault close current, (3 times)32kA asym32kA asym32kA asym
One second current25kA sym25kA sym25kA sym
Fault interrupting ratings12kA or 20kA12kA or 20Ka12kA or 20kA
Mechanical endurance, operations200020002000
EEE 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
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