Powering Life for Modern Humanity

SBU-Series 208V-480V UL891 Listed Switchboard

208V, 480V, 600V - Low Voltage Paralleling, Transfer, & Distribution Fully Assembled Electrical Switchboard Up to 4000A Main Bus

This complete line of 208V – 690V indoor and outdoor switchgear is the ultimate in flexibility and has options available to meet virtually any power system needs.

Switchboards can be custom designed or utilize a standard
configuration to meet specific dimensional and electrical
requirements. They can include fully integrated component options
from leading manufacturers, including automatic transfer switches,
SPD, distribution transformers, and PLC or relay based transfer
schemes, Automation, Metering and Monitoring. Circuit breakers
and fusible switches can be group or individually mounted. Indoor
and outdoor enclosures are available in a wide range of durable color


UL 891 Listed & Labeled
Voltage: 208V – 690V, 3Ø
Frequency: 60Hz or 50Hz
Silver plated copper bus
Standard bus ampacity up to 4000A
Busbar connections with NEMA standard hole pattern
Bus Access & Cable Entry
Front or Rear Access for either top or bottom cable entry
Insulated Case Circuit Breakers
Molded Case Circuit Breakers
Intelligent close prevents simultaneous connection of multiple generators to dead bus

208V-480V-UL-Listed-Low-Voltage Paralleling Switchgear APT Power

Low Voltage Switchgear Options

Some of the available options include:

  • Automatic Load Transfer Switching operation
  • Automatic Main-Tie Main operation
  • Configurations with multiple Main and multiple Tie circuit breakers
  • Incorporation of any size dry type transformers
  • Automatic paralleling of multiple generators for Prime Power application
  • Automatic paralleling of multiple generators for Co-Generation application
  • Automatic paralleling of multiple generators for Peak-Shaving application
  • Automatic paralleling of dissimilar prime movers such as: gas turbines, diesel engines, natural gas reciprocating engines, landfill and digester gas reciprocating engines, combustion turbines, synchronous and induction generators, inverter based systems, motor-generators, wind and solar driven generators
  • Seamless load transfer between power sources
  • Solid, low impedance and high impedance grounded systems
  • Indoor (NEMA 1), Outdoor non walk-in (NEMA 3R) and Outdoor walk-in (pre-engineered heated and air conditioned equipment enclosure) configurations
  • Heavy skid mounted switchgear and substations
  • Provisions for maintenance grounding of the feeder cables
  • Web enabled, remote monitoring and control
  • Remote control and relay panels
  • Remote access switchgear control line-ups for ultimate operator safety

Applicable Standards

Related Products

Quick Connection Switchgear Information

The APT MF2-Series Generator/Loadbank Quick Connect Switchgear is designed to allow quick and safe connection of either a medium voltage mobile generator set or a low voltage mobile generator connected to a medium voltage step up transformer to facilities experiencing loss of power. The MF2-Series is ideal for facilities that require medium voltage (2.4kV to 15kV). The switchgear is rated Type 3R for outdoor installation. Permanent installation and connection of the switchgear to the facility power distribution system will minimize any unplanned power outages.

Medium Voltage Generator Quick Connection Switchgear