Description and Application
The Type BPF By-Pass Switch is used to bypass and isolate substation reclosers for routine maintenance and repair. The switch usually is applied in combination with a separately mounted M3S companion disconnect switch.

The BPF By-Pass Switch consists of a 600 Amp loadbreak disconnect switch in series with a Type C cutout fuse holder, which provides protection to the circuit while the recloser is out of service. Both devices are mounted on a common mounting channel for ease of installation. Both 100 Amp and 200 Amp fuse holders are available to fit specific installation requirements.

The BPF Switch is available in ratings of 15kV - 110kV LIW* and 27kV - 150kV LIW* with either 100 Amp or 200 Amp fusing. The fuse mounting can be either on the right- or left-hand side of the switch.
*LIW = Lightning Impulse Withstand

Operation
Operation of the Type BPF Bypass Switch is shown in the figure below (shown with an M3S companion disconnect switch). In normal operation the fuse holder is disconnected and the circuit recloser provides circuit protection. To bypass the recloser for repair, maintenance, etc., the cutout fuse holder with appropriate fusing is installed in the bypass disconnect and closed and the series disconnect switch blade is opened to isolate the recloser. The M3S companion disconnect switch is opened last to completely isolate the recloser from the circuit.

To restore service, the recloser should be closed. The M3S companion disconnect switch is closed followed by the disconnect blade on the BPF Bypass Switch. The fuse holder is then opened and removed.

Performance Specifications
• 600 Amps Continuous • 65 kA Peak Withstand

Type BPF By-Pass Combination Switch

BP3 Switch Components

1. Terminal Pads (All)
   Tin-plated high-conductivity copper, NEMA two-hole terminal pad. Parallel Groove connectors (Cat. No. ATC1343) and captive hardware are available as options.
   
   
2. Loadbreak Hooks
   Hot-dipped galvanized steel hooks are provided as standard on the disconnect blade and fuse mounting.
   
   
3. Disconnect Blade
   The by-pass disconnect blade is of the same construction as that used on the M3 Hookstick Disconnect Switch. They are high-conductivity copper blades, silver-plated at all contact areas. Stainless-steel back-up springs are used to maintain efficient current transfer between the stationary contact and the end of the blade. See Catalog Section 14B for further description.
   
   
4. Type C Cutout Fuse Holder
   The same fuse holder used in Type C Cutouts, with a wealth of field operating history. Available in either 100 Amp or 200 Amp and mounting on the right- or left-hand side of the switch assembly.
   
   
5. Insulators
   Insulators are ANSI/NEMA 3-inch bolt circle TR 205 or 208.
   
   
6. Mounting Base
   Formed galvanized-steel base provides maximum rigidity and is designed for substation structure mounting.

View Diagrams here.