Square D Digest 179

Air-Insulated Switchgear for Secondary Distribution

Medium Voltage Switchgear

Class 6045 / Refer to Catalog 6045CT9801 or Application Guide 6040PD9601

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HVL/cc Metal-Enclosed Load Interrupter Switchgear—Full Range Square D™ brand HVL/cc metal-enclosed load interrupter switchgear with a sealed switch enclosure contains the contact arcing from switch contacts (all interruption takes place within the sealed enclosure), a critical concern in gaseous environments – Class 1 Div 2 certified. The permanently sealed switch help prevent switch contamination, especially important in dusty environments, thus eliminating maintenance on main and ground switch contacts. Its compact size is made up of modular units, making the HVL/cc easy to expand future extensions and connections to existing equipment and ideal for retrofit applications. With front access, only options available at system voltages below 17.5 kV can be positioned against walls, in small rooms, or in prefabricated buildings. The small footprint can result in considerable cost savings from the reduction of building or room sizes. The HVL/cc switch can be equipped with either an over-toggle mechanism (OTM), which is standard, or an optional stored energy mechanism (SEM). Top or bottom cable entry enhances installation flexibility. Enclosures are free-standing and suitable for both indoor (NEMA 1) and outdoor (NEMA 3R) applications.

Front

Optional low voltage compartment Main bus compartment Mechanism compartment Switch with enclosure Fuse cable compartment

90.00 2286

37.25 946

Fuse/cable access panel

37.25 946

Front View 14.75 375

W

Right Side View

Plan View

Table 11.25: HVL/cc Load Interrupter Switches— Full Range 600/1200 A Ratings Switch (kV)—maximum design 5.5 17.5 17.5 25.8 38 BIL (kV) 60 95 95 125 150 Frequency (Hz) 50/60 50/60 50/60 50/60 50/60 Withstand (kV) 19 36 36 50 80 Continuous current (A) 600/1200 600/1200 600/1200 600 600 Interrupting current (A) 600/1200 600/1200 600/1200 600 600 Fault close (kA asymmetrical) 40 40 40 32 32

11 SWITCHBOARDS AND SWITCHGEAR

Momentary current (kA asymmetrical) Short time current (kA symmetrical)

40

40

40

32

32

25

25

25

25

25

Electrical endurance (number of operations at 80% P.F.)

100/600 A 100/600 A 26/1200 A 26/1200 A

100/600A 26/1200A

100

100

Mechanical endurance (number of operations)

1000

1000

1000

1000

1000

11-23

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