All posts by Cody Whisenhunt, President, BCS Switchgear

BCS Switchgear is an industry leader in new and obsolete electrical control and distribution equipment. Since 1997, BCS has been servicing customers to extend electrical life of low and medium voltage electrical power equipment. Cody can be reached by email: [email protected]
Power Vac Breakers for sale

GE Power Vac Vacuum Breakers Switchgear

GE Power Vac Vacuum Breakers and Switchgear

Power Vac Breakers for sale

GE Power Vac Switchgear Upgrade, Replacement Solutions

 

GE Power Vac Switchgear has served as a trusted solution for medium-voltage power distribution throughout North America for more than 40 years. Facilities trust these systems to control, protect and feed critical power.

Original breaker installations remain in service today, and facility managers face maintenance, modernization, and replacement. Advances in breaker technology, digital protection systems, and monitoring capabilities create opportunities to improve reliability and extend life in existing equipment.

Knowing how GE Power Vac Vacuum Circuit Breaker technology interacts with switchboards and panelboards helps you make informed decisions.

Need Help?

Understanding GE Power Vac Switchgear

GE Power Vac Switchgear is metal-clad Medium Voltage Switchgear lineup designed to receive, control, and distribute electrical power while protecting equipment from damaging fault conditions. These systems are installed in voltage classes ranging from 5kV through 15kV and higher.

Power Vac switchgear was developed around vacuum interruption technology with advantages over earlier air and oil breaker designs. 

The equipment consists of multiple compartments housing vacuum circuit breakers, protective relays, control systems, bus structures, instrument transformers, and metering devices. Each component works together to isolate faults quickly for safe system operation.

GE Power Vac Breakers at Work

The most recognizable component in a Power/Vac lineup is the GE Power Vac Vacuum Circuit Breaker. These breakers are responsible for opening and closing electrical circuits under normal operating conditions and interrupt fault currents.

Unlike older technologies that relied on air or oil to extinguish electrical arcs, vacuum breakers contain specially designed interrupters sealed within a vacuum environment. 

When breaker contacts separate, the vacuum prevents the arc from sustaining itself, letting current flow stop rapidly and safely.

This design dramatically reduces contact wear and maintenance requirements. 

Medium Voltage Switchgear

Large commercial or industrial facilities depend on functioning Medium Voltage Switchgear. Before power reaches production equipment, mechanical systems, lighting loads, or office spaces, it passes through the switchgear protecting the entire electrical distribution network.

Switchgear protects millions of dollars’ worth of equipment. In a hospital, it helps critical systems remain operational. In a data center, switchgear maintains uptime and prevents service interruptions.

Switchboards and Panelboards

A common misconception is that switchgear, switchboards, and electrical panelboards perform the same function. But each serves a different purpose in the electrical distribution hierarchy.

A typical facility power flow follows this sequence: Utility Service -> Medium Voltage Switchgear -> Transformer -> Switchboard -> Panelboards -> Electrical Loads.

Switchgear receives incoming utility power and provides primary protection for the facility. 

Medium Voltage Power Distribution

Utility Service -> Disconnect Switch -> Transformer -> Power Vac -> Switchboard -> Power Distribution

power vac distribution system

GE Power Vac System Overview

This overview shows how GE Power Vac Switchgear, transformers, switchboards, and panelboards work together in a facility power distribution system.

System Stage Function Why It Matters
Utility serviceIncoming electrical powerFeeds the medium-voltage protection system at the front end of the facility.
GE Power/Vac switchgearPrimary medium-voltage protection and switchingReceives incoming utility power and protects equipment from damaging fault conditions.
TransformerVoltage reductionReduces voltage to utilization levels such as 480 volts before downstream distribution.
SwitchboardLow-voltage distribution centerDistributes heavy power to major equipment and distribution feeders.
PanelboardsFinal branch-circuit distributionDivide feeder power into individual circuits for lighting, receptacles, HVAC branch circuits, and general loads.

Power Vac Switchgear FAQ

GE Power Vac Switchgear is metal-clad Medium Voltage Switchgear designed to receive, control, and distribute electrical power while protecting equipment from damaging fault conditions.

The breaker opens and closes electrical circuits under normal operating conditions and interrupts fault currents using sealed vacuum interrupters.

Before power reaches production equipment, mechanical systems, lighting loads, or office spaces, it passes through switchgear responsible for protecting the electrical distribution network.

Switchboards act as the primary low-voltage distribution center and distribute heavy power to major equipment and distribution feeders throughout the building.

Panelboards represent the final stage of power distribution by dividing incoming feeder power into individual branch circuits serving facility loads.

Facilities often consider modernization when protective relays no longer meet modern requirements, replacement parts become difficult to source, insulation systems age, or maintenance needs increase.

Power Vac Switchgear Glossary

GE Power Vac Switchgear: Metal-clad Medium Voltage Switchgear designed to receive, control, and distribute electrical power while protecting equipment from damaging fault conditions.

GE Power Vac Vacuum Circuit Breaker: A Power/Vac breaker used for opening and closing electrical circuits and interrupting fault currents.

Medium Voltage Switchgear: Switchgear that protects the electrical distribution network before power reaches production equipment, mechanical systems, lighting loads, or office spaces.

Vacuum Interruption Technology: A breaker design using sealed vacuum interrupters to help stop current flow rapidly and safely.

Switchboard: The primary low-voltage distribution center that distributes heavy power to major equipment and distribution feeders.

Panelboard: The final stage of power distribution, dividing feeder power into individual branch circuits serving facility loads.

Power Vac Breaker Replacement: A replacement approach using modern breakers engineered to fit existing Power/Vac structures.

Legacy Switchgear Modernization: A strategy for improving performance while preserving existing switchgear infrastructure.

Digital Protective Relay: Modern relay technology that can improve system visibility, protection, monitoring, and communications integration.

BCS Switchgear Production

Planning Legacy Switchgear Modernization, or evaluating the overall condition of your Medium Voltage Switchgear? Look beyond the switchgear lineup itself. Transformers, switchboards, and panelboards all play critical roles in delivering power throughout a facility.

When these systems work together, they create a reliable electrical distribution network supporting operations for decades to come.

Need Help?

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Reliagear 60-Inch Feeder

ABB ReliaGear Switchboard – 4000A Main with 60-Inch Feeder

ReliaGear-SB-Switchboard-–-4000A-Main-with-60-Inch-Feeder

ReliaGear SB 4000A Main / 60-Inch Feeder Section

Facilities with high electrical needs need distribution equipment that can handle substantial power loads while still leaving room for maintenance, monitoring, and future expansion. A ReliaGear SB switchboard with a 4000A main and 60-inch feeder section is designed for commercial and industrial settings where reliability, flexibility, and service access matter.

This type of UL 891 switchboard is used in data centers, healthcare facilities, manufacturing operations, utility infrastructure, and large commercial buildings that require robust low-voltage power distribution. The 4000A main supports heavy incoming service requirements, while the wider feeder section gives contractors and facility teams more space for downstream feeder distribution.

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High-Amperage Main Distribution Design

A 4000-amp switchboard lineup handles incoming electrical service while distributing power throughout multiple downstream feeder sections. The main section uses an ABB SACE Emax 2 air circuit breaker for upstream protection and system coordination.

Modern air circuit breakers provide more than basic overcurrent protection. Facilities rely on advanced trip units, communication capabilities, and monitoring functions to improve visibility and reduce downtime during fault conditions. These features help maintenance teams identify problems while supporting selective coordination strategies across the electrical system.

Advantages of a 60-Inch Feeder Section

With a 60-inch feeder section, the switchboard provides additional interior space for cable routing, feeder breaker installation, and future expansion. Compared to narrower feeder compartments, the wider section improves working clearances and gives contractors more flexibility during installation.

The additional width is useful when projects involve high cable density, large conductors, surge protection devices, or integrated metering equipment. Maintenance access can also improve because technicians have more room to work inside the section during inspections, upgrades, or modifications.

Flexible Plug-In Feeder Breaker Architecture

ReliaGear SB switchboards are configured with plug-in feeder breaker systems that support flexible distribution layouts. ABB SACE Tmax XT molded case circuit breakers are applied throughout feeder sections to provide branch and feeder protection.

Instead of relying entirely on fixed hard-mounted breakers, plug-in arrangements allow breakers to be added or replaced more efficiently when system requirements change. This flexibility reduces maintenance time and makes future modifications easier for expanding facilities.

Integrated Monitoring and Power Visibility

Electrical distribution equipment has evolved well beyond basic power delivery. Modern facilities often expect integrated monitoring and energy management capabilities directly within the switchboard lineup.

Depending on project requirements, a ReliaGear SB switchboard can include power metering systems, remote communication capability, energy monitoring integration, surge protection devices, and power quality monitoring. These technologies help operators monitor electrical usage, identify abnormal conditions, and improve long-term system management.

Custom 4000A Switchboard Manufacturing

A 4000-amp switchboard lineup is designed to handle significant incoming electrical service while distributing power throughout multiple downstream feeder sections.

Switchboard Manufacturing

Typical 4000A Switchboard

This overview shows how a ReliaGear SB switchboard with a 4000A main and 60-inch feeder section supports heavy-duty low-voltage power distribution, serviceability, and future expansion.

Component Function Why It Matters
4000A main breakerIncoming service protectionSupports high-capacity service entrance and upstream protection needs.
60-inch feeder sectionAdditional feeder and cable spaceImproves routing, working clearance, and future modification flexibility.
Plug-in feeder breakersFlexible downstream distributionHelps simplify breaker additions, replacements, and future load changes.
Integrated meteringElectrical monitoring and diagnosticsGives facility teams better visibility into loading and system performance.
Surge protectionProtection from transient voltage eventsHelps protect sensitive downstream equipment from damaging surges.
Configurable bussingFlexible switchboard layout designAllows center, offset, or one-sided bus strategies depending on project layout.
UL 891 constructionCompliance for low-voltage switchboardsSupports code-compliant equipment design for commercial and industrial facilities.

ReliaGear 4000 Amp Switchboard FAQ

A larger feeder section provides additional room for feeder breakers, cable management, metering equipment, and future electrical expansion.

Large commercial and industrial facilities such as data centers, hospitals, manufacturing plants, utilities, and large commercial buildings frequently use 4000A switchboards.

Yes. ReliaGear SB switchboards are commonly designed with plug-in feeder breaker configurations to improve flexibility and simplify future modifications.

Yes. Metering, communication systems, surge protection, and energy monitoring solutions can be incorporated depending on project requirements.

Typical applications include 208Y/120V, 480Y/277V, and 600Y/347V electrical systems.

Yes. The wider feeder section and flexible breaker arrangement can simplify future electrical growth and equipment additions.

ReliaGear SB Glossary

ReliaGear SB switchboard: ABB low-voltage switchboard platform used for commercial and industrial power distribution applications.
4000A main: A main protective device rated for 4000 amps of incoming electrical service.
60-inch feeder section: A wider feeder compartment that provides additional space for breaker mounting, cable routing, and maintenance access.
Plug-in feeder breaker: A breaker arrangement designed to simplify installation, replacement, and future feeder changes.
ABB SACE Tmax XT: Molded case circuit breaker family commonly used for feeder distribution in ABB switchboard applications.
ABB SACE Emax 2: Low-voltage air circuit breaker platform often used for main, tie, or large feeder protection.
Selective coordination: A protection strategy intended to isolate a faulted section while keeping unaffected portions of the electrical system operating.
Bus layout: The internal busbar arrangement that distributes power through the switchboard sections.
UL 891 switchboard: A low-voltage switchboard assembly built to the UL 891 safety standard for switchboard equipment.

Custom Electrical Power Equipment

BCS Switchgear provides engineered switchboards and switchgear for dependable power distribution in permanent and temporary applications. We design and build UL 891 switchboards for industrial and commercial facilities, including high-capacity lineups such as a ReliaGear SB 4000A main with a 60-inch feeder section. If you want to see more about our process, review our switchboard manufacturing resources.

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