B-2 regulator bypass medium-voltage disconnect switches and assemblies

15-38 kV
  • Rated continuous current up to 900 A

  • Lightning impulse (BIL) up to 200 kV

B-2 medium-voltage regulator bypass disconnect switches

A versatile bypass solution, the type B-2 bypass switch is purposely designed as a recloser bypass and can also be used as a regulator bypass. Underhung and angled pole-mounting brackets contribute to ease of installation.


Watch the video below to learn more about Siemens medium-voltage air-break disconnect switches. 


Recloser or regulator bypassing to reduce the impact of equipment maintenance on network reliability.


Features include:

  • Robust square-tubular copper blades.


  • Porcelain or polymer insulators
  • Stop-position angle
  • Left- or right-hand bypass operation
  • Custom terminal arrangements
  • Loadbreak hooks.


  • Voltage ratings of 15, 27, and 38 kV
  • Rated continuous currents of 600 and 900 A
  • Lightning impulses (BIL) of 110, 150, and 200 kV.

Bypass recloser assembly type B-2

Siemens type B-2 bypass assembly offers quick and simple installation. Originating from the reliable B-2 single-phase switch, all three-phase units ship preassembled on the crossarm for easy installation at the site, which reduces time and overall installation costs. A B-2 bypass assembly is customizable with porcelain or polymer insulators and galavanized or fiberglass bases. The assembly provides a means for bypassing and disconnecting pole-mounted reclosers. Proper sequence operation allows the recloser to be bypassed and isolated from the system.


  • Reduce downtime when maintenance is required
  • Minimize installation time through pre-assembly.

Features and benefits:

  • 15.0 kV, 25.0 kV and 38.0 kV voltage ratings
  • Factory installed on galvanized or fiberglass arm
  • Adjustable pole gain provides angling option per field conditions
  • Single- or double-point lift bracket
  • Arm length 8’ (2.4 m), 10’ (3.0 m), or 12’ (3.7 m) (custom phase-spacing available)
  • Customer terminal pad options to simplify terminal connections
  • Easy identification of bypass blades in open or closed position
  • Three-pull design
  • Square copper-tube blades
  • High-pressure coin silver contacts
  • Load-break hooks available
  • Left- or right-hand bypass blade
  • Custom configurations available
  • Coastal environment options
  • Quick installation
  • Factory adjusted.
Maximum nominal voltage kV
Basic insulation level kV
Continuous current

Mailing address

Siemens Industry, Inc.

99 Bolton Sullivan Drive

Heber Springs, Arkansas 72543

United States

Visit us in booth #1150 at IEEE PES T&D Conference and Exposition 2020 October 13-15 at McCormick Place South in Chicago, IL 

"A world class event. A powerful experience." See the strength and robustness of Siemens medium-voltage distribution products and solutions on display including:

  • The debut of Siemens new SDV-R-AR arc-resistant outdoor circuit breaker ideal for renewable applications.
  • Overhead solutions like the CMR compact modular recloser, a lightweight reduced maintenance alternative to traditional oil-filled reclosers, the Fusesaver,  the world's fastest medium-voltage circuit breaker now with rechargeable communications module, plus disconnect switches and bypass assemblies. 
  • 8DA10 gas-insulated switchgear with its isolated phase-design that virtually eliminates phase-to-phase faults and has a footprint up to 75% smaller than traditional air-insulated switchgear.  
  • GM-SG air-insulated switchgear with SIERS  integrated closed door electrical-racking system, which helps provide additional personnel protection against arc-flash exposure for operators.