T - Load Break Switchgear with Integral Ground

G&W Electric T padmount and vault gas-insulated switchgear features load break switching capability with visible break and integral ground position in a totally sealed, dead front device. The integral ground position eliminates the need to handle any high voltage connections to ground the cable. The switches are designed for use on 3-phase systems with voltages up to 38kV, 630A load break and continuous current, and 40kA asymmetrical momentary ratings. They feature front access construction with switch operators on the front side and bushings on the front, top or rear side of the switch. The bushings are arranged in a straight line on the switch tank so that all the bushings are at the same height.

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

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Features and Benefits

Construction - In-line bushing construction for terminations 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 - All ways are equipped with visible break to view the open, closed and ground positions.

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

Voltage Sensing - Available 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.

Configuration Chart for T

# of Ways	One-line Diagram (Horizontal)	Voltage Class (kV)	Mom. (kA asym)	Catalog Number	Approximate
					Width* in. (mm)	Wt. w/SF6 lbs (kg)
2		15	40	T21-376F-40RP	45 (1143)	1400 (636)
		25		T21-386F-40RP
		35		T21-396F-40RP
3		15	40	T33-376F-40RP	60 (1524)	1600 (714)
		25		T33-386F-40RP
		35		T33-396F-40RP
4		15	40	T44-376F-40RP	75 (1905)	2100 (953)
		25		T44-386F-40RP
		35		T44-396F-40RP
5		15	40	T55-376F-40RP	90 (2286)	2300 (1044)
		25		T55-386F-40RP
		35		T55-396F-40RP
6		15	40	T66-376F-40RP	105 (2667)	2750 (1250)
		25		T66-386F-40RP
		35		T66-396F-40RP
Approximate Enclosure Depth: 51.0" (1448mm). Approximate Height: 49.0" (1245mm)

Ratings Chart for T

Voltage Class	15kV	25kV	35kV
Maximum Design Voltage	15.5kV	27kV	38kV
Impulse Level (BIL)	110kV	125kV	150kV
One Minute Withstand	35AC kV	60AC kV	70kV
One Minute Withstand, Protection Test Rating	34AC kV	40AC kV	50kV
15 minute withstand	53DC kV	78DC kV	103kV
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 sym	25kA sym	25kA sym
Mechanical endurance, operations	2000	2000	2000