TNI - Load Break Switching and Fault Interrupting both with Integral Ground

As a proven solution in corrosive environments and submersible applications, G&W Electric model TNI padmount switches include load break and fault interrupting capability with visible break and integral ground position on each way. This eliminates the need to handle any high voltage connections to ground the cable. The high voltage connections are positioned on the opposite side of the switch operators to further isolate the operator from high voltage. 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, 630A load break, and continuous current, with 12.5kA, 20kA, and 25kA symmetrical fault interrupting ratings.

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

Construction - Available with front accessible switch operators and rear bushings. Vault construction is also available with top or bottom bushings.

Visible Break - All ways are equipped with visible break to view the open, closed, and ground positions.

Fault Interrupting - Three phase fault interrupting up to 25kA with selectable industry curves including fuse emulation curves.

Ground Position - Integral ground position on all ways to eliminate the need to handle high voltage components to ground the cable.

Voltage Sensing - All 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, protection, or LaZer custom solutions are available.

Configurations Chart for TNI

Model	One-line Diagram (Horizontal)	Voltage Class (kV)	Catalog Number	Approximate
				Width* in. (mm)	Wt. w/SF6 lbs (kg)
5		15	TNI21-376-12-5L	51 (1295)	1725 (782)
		25	TNI21-386-12-5L
		35	TNI21-396-12-5L
6		15	TNI32-376-12-6L	69 (1753)	2900 (1315)
		25	TNI32-386-12-6L
		35	TNI32-396-12-6L
7		15	TNI31-376-12-7L		2670 (1211)
		25	TNI31-386-12-7L
		35	TNI31-396-12-7L
9		15	TNI42-376-12-9L	88 (2235)	3170 (1437)
		25	TNI42-386-12-9L
		35	TNI42-396-12-9L
11		15	TNI43-376-12-11L		3095 (1403)
		25	TNI43-386-12-11L
		35	TNI43-396-12-11L
12		15	TNI41-376-12-12L		3245 (1471)
		25	TNI41-386-12-12L
		35	TNI41-396-12-12L
51		15	TNI51-376-12-51L	106 (2692)	3840 (1741)
		25	TNI51-386-12-51L
		35	TNI51-396-12-51L
52		15	TNI52-376-12-52L	106 (1753)	3735 (1698)
		25	TNI52-386-12-52L
		35	TNI52-396-12-52L
53		15	TNI53-376-12-53L		3690 (3200)
		25	TNI53-386-12-53L
		35	TNI53-396-12-53L
54		15	TNI54-376-12-54L
		25	TNI54-386-12-54L
		35	TNI54-396-12-54L
62		15	TNI62-376-12-62L	124 (3150)	4340 (1969)
		25	TNI62-386-12-62L
		35	TNI62-396-12-62L
63		15	TNI63-376-12-63L		4265 (1935)
		25	TNI63-386-12-63L
		35	TNI63-396-12-63L
64		15	TNI64-376-12-64L		4275 (1939)
		25	TNI64-386-12-64L
		35	TNI64-396-12-64L
65		15	TNI65-376-12-65L
		25	TNI65-386-12-65L
		35	TNI65-396-12-65L
Approximate Height = 53" (1346mm), Approximate Depth = 73" (1854mm)

Configurations Chart for VTNI

Model	One-line Diagram (Horizontal)	Voltage Class (kV)	Catalog Number	Approximate
				Width* in. (mm)	Wt. w/SF6 lbs (kg)
5		15	VTNI21-376-12-5L	46 (1168)	1115 (507)
		25	VTNI21-386-12-5L
		35	VTNI21-396-12-5L
6		15	VTNI32-376-12-6L	65 (1651)	1885 (857)
		25	VTNI32-386-12-6L
		35	VTNI32-396-12-6L
7		15	VTNI31-376-12-7L		1960 (891)
		25	VTNI31-386-12-7L
		35	VTNI31-396-12-7L
9		15	VTNI42-376-12-9L	88 (2235)	2360 (1073)
		25	VTNI42-386-12-9L
		35	VTNI42-396-12-9L
11		15	VTNI43-376-12-11L	83 (2108)	2285 (1039)
		25	VTNI43-386-12-11L
		35	VTNI43-396-12-11L
12		15	VTNI41-376-12-12L		2435 (1107)
		25	VTNI41-386-12-12L
		35	VTNI41-396-12-12L
51		15	VTNI51-376-12-51L	101 (2565)	2930 (1332)
		25	VTNI51-386-12-51L
		35	VTNI51-396-12-51L
52		15	VTNI52-376-12-52L		2855 (1311)
		25	VTNI52-386-12-52L
		35	VTNI52-396-12-52L
53		15	VTNI53-376-12-53L		2780 (1264)
		25	VTNI53-386-12-53L
		35	VTNI53-396-12-53L
54		15	VTNI54-376-12-54L		2701 (1230)
		25	VTNI54-386-12-54L
		35	VTNI54-396-12-54L
62		15	VTNI62-376-12-62L	119 (3023)	2430 (1105)
		25	VTNI62-386-12-62L
		35	VTNI62-396-12-62L
63		15	VTNI63-376-12-63L		2355 (1070)
		25	VTNI63-386-12-63L
		35	VTNI63-396-12-63L
64		15	VTNI64-376-12-64L		2280 (1036)
		25	VTNI64-386-12-64L
		35	VTNI64-396-12-64L
65		15	VTNI65-376-12-65L		2205 (1002)
		25	VTNI65-386-12-65L
		35	VTNI65-396-12-65L
Approximate Height = 42.5" (1080mm), Approximate Depth = 36" (914mm)

Ratings Chart for TNI and VTNI

Voltage Class	15kV	25kV	35kV
Maximum design voltage	15.5kV	27kV	38kV
Impulse level (BIL)	110kV	125kV	150kV
One minute withstand	35 AC kV	60 AC kV	70 kV
One minute withstand, production test rating	34 AC kV	40 AC kV	50 kV
15 minute withstand	53 DC kV	78 DC kV	103 kV
Continuous and load break current	630 Amps	630 Amps	630 Amps
Momentary current	40kA asym	40kA asym	40kA asym
Fault close current, (3 times)	32kA asym	32kA asym	32kA asym
One second current	25kA asym	25kA asym	25kA asym
* Fault interrupting ratings	12.5kA*	12.5kA*	12.5kA*
Mechanical endurance, operations	2000	2000	2000
EEE C37.60 Fault Interrupting Duty; Total number of fault interruptions: 116
Percent of Maximum Interrupting Rating		No. of Fault Interruptions
15 – 20%		44
45 – 55%		56
90 – 100%		16
* 20kA and 25kA options available