Vault Style Fused Switches to 40kA Momentary

Fault interrupting to 50kA symmetrical.

For applications through 23kV requiring current limitation and overcurrent interruption through 50kA

symmetrical, SF6 switches can be equipped with integral air insulated, canister style current limiting fusing.

G&W's rectangular tank linear puffer (LP) and Rotary Blade (SF) switches are available in two-way through six-way configurations.  Switches are rated through 23kV, 600A maximum continuous current.  Protected ways are rated per Table 2 (see bottom of page).  Bushings and operating apparatus can be front, top, bottom or side mounted.  Wall mounting channels and various frame options are available.  Both horizontal and vertical styles are available.

Features:		Switch with front mounted fusing.
	Compact, dead-front construction.
	Mechanical or key interlocking arrangments preventing access to the fuses unless the switch is in the open position.
	Safe, quick fuse replacement using conventional tools and without exposing switch dielectric or current carrying parts to environmental contamination.
	Two fuses can be connected in parallel to double the capacity rating of the switch.
	Fuse curves are available through your G&W representative.

Table 1 - FRAM/FGRAM/FRAD Series (Typical Configurations)

One-Line Diagram	Voltage Class (kV)	Switch Style	Catalog Number*	Width - Inches (mm)**	Approx. Wt. w/ SF6 lbs. (kg)
	15	PI	FRA21-376M-40PI	26.2 (667)	600 (273)
	15	PI	FRAM-33-376M-40PI	49 (1236)	850 (386)
		PI	FFRAM33-376M-40PI	52 (1321)	725 (330)
	15	PI	2FRAM33-376E-40PI	61.5 (1562)	970 (440)
	15	SF	FGRAM33-376M-40SF	69.5 (1765)	1550 (704)
		SF	FFGRAM33-376M-40SF	72.5 (1842)	1600 (727)
	15	PI	2FFRAM33-376M-40PI	80.5 (2045)	1750 (795)
	15	PI	2FFRAM44-376M-40PI	89.5 (2273)	1900 (862)
	15	SF	2FFGRAM44-376M-40SF	105 (2667)	2000 (907)
	15	PI	FFRAM55-376M-40PI	72.2 (1835)	1550 (702)
	15	SF	FFRAD31-376-40SF	51 (1295)	1000 (454)

* Catalog number suffix: PI = Linear Puffer, SF = Rotary Blade

** Tank depth = 26" (584mm), tank height = 28" (711mm). 

Optional 6-1/2" phase spacing (SRA style) is available for PI switches and will increase tank depth by 3" (76mm).  All dimensions are approximate and do not include entrances, guages, frames, operators or mounting channels.

Typical Specifications
Add the following information to the appropriate fused switch specifications.
Canister Fusing Construction
Fusing shall be deadfront and submersible using non-venting, current limiting fuses installed in drywell canisters built into the switch.  The fuses shall be ANSI C37.473.C rated, interrupting both high and low level fault currents while limiting the available fault current on the system. The fuseholder shall be located for easy fuse replacement and be interlocked to prevent fuse removal unless the series switch is open.		Replaceable and interchangeable fuses
Standard Components
	Replaceable and interchangable, commercially available, general purpose current limiting fuses.
	Provisions for standard hook stick fuse removal and replacement.
	Single or parallel fuseholders as specified.

Table 2 - Air Canister Style Fuse Ratings

* Fuses rated above 25 Amps are required to be nongassing fuses.