Power Back


Temporary Power Restoration Device
Auto Transformer restores a missing hot leg (or neutral) in either 120/240V or 120/208V 3-wire services.

15kva and 20kva PowerBacks now shipping in Stainless Steel NEMA4 enclosures with on-board Voltage Indicators for both 120v legs

Why Utility Companies use the PowerBack

  • Ultra-compact Power Restoration Device.
  • Provides same day temporary power restoration.
  • Saves time and money. Now you can quickly restore power and schedule permanent repairs at a later date instead of having to make repairs immediately.
  • Designed for both overhead 120/240V and underground 120/240V 3-Wire systems.
  • Stainless Steel Wheeled-Cart is Easy to Move. One person can transport the PowerBack to the job site. No crew or special truck is needed to transport the PowerBack.
  • Lightweight – Just half the weight of competitor products (see weights below)
  • No need to bridge or run shunts for residential customers who have lost one phase or the neutral to their home.
  • Improves public safety by avoiding the need to run temporary cables between customers when a phase is lost.
  • Increases customer satisfaction with faster service restoration.
  • Thermal Protected High Efficiency Toroidal Transformer- Located near the primary windings of the transformer is a 105C thermal protector switch wired directly to the Shunt-Trip solenoid in the Circuit breaker. Should the transformer over-heat due to overload or short-circuit, the circuit breaker will trip and shut the unit down.

How it works

The PowerBack provides a quick, convenient source of 240 volt power up to *20,000 VA from one phase and a good neutral or 120v service from two good phases (restoring neutral).

The PowerBack Restores Power to both homes and businesses.


PB15K-M 125A Breaker – Supports 150A Service – 115lbs

PB20K-M 160A Breaker – Supports 200A Service – 135lbs

PB30K-M 250A Breaker – Supports 320A Service – 220lbs

PB50K 400A Breaker – Supports 400A Service – 290lbs


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PowerBack 30 kVA 320A ServicePowerBack 30 kVA 320A Service

PB30K-M is the only auto transformer spec’d to support 320A homes.

30Kva High Efficiency Toroidal Autotransformer
• 10ft service cable (4/2AWG) w/ Heavy Duty 2-part CL320A Metering Adapter for Lever By-Pass Metering sockets
• 250A Circuit Breaker—125A Rating Continuous Load per Hot Leg
• Thermal Protection (105C) protects transformer against excessive overload
• NEMA 4 All-Weather STEEL enclosure w/ lockable door and welded lifting eye
• 13” x 3.5” Foam-Filled Flat Free tires, roller bearing hubs , stainless steel axle
• Quick reference Installation instructions inside of front door
• 3yr Warrantee (1yr Warrantee on Metering Adapter)


PowerBack 50 kVA Multi HomePowerBack 50 kVA Multi Home











PB50K PowerBack – Multi Home / Pad Transformer Support 400A Breaker – 3 Flying Lead Connections

Optional Qwick-Lok Disconnect Lead Extensions with Loop Connections in a Flood Seal Boot

• 50Kva High Efficiency Toroidal Autotransformer – 400A Breaker
• 2x 120V Hot Leads = 1AWG x 10ft Long
• 1 Neutral Lead = 3/0AWG x 10ft long
• Optional – 5ft. Long Quick-Lock disconnects w/ 1 hole Flood-Seal Connectors
• Thermal Sensor (105C) protects transformer against excessive overload
• NEMA 4 All-Weather enclosure w/ lockable door system, and welded lifting eye
• 13” x 3.5” Foam-Filled Flat Free tires, roller bearing hubs , stainless steel axle
• Quick reference Installation instructions inside of front door
• 3yr Warrantee

Huntsville UtilitiesAlabama
ENMAX, Calgary Alberta CAAlberta, CA
Arizona Public ServiceArizona
North Little Rock Electric DepartmentArkansas
City of Azusa, CACalifornia
Pacific Gas & ElectricCalifornia
City of Gunnison COColorado
San Miguel Power Assn, Inc.Colorado
Xcel EnergyColorado, Minnesota, Wisconsin
Delaware Electric CoopDelaware
Delmarva Power & Light CODelaware, Maryland, Virginia
Florida Power & Light CompanyFlorida
Cobbs EMCGeorgia
Georgia PowerGeorgia
Jackson Electric Membership CorporationGeorgia
City Of Weiser, IdahoIdaho
Commonwealth EdisonIllinois
Anderson Municipal Light Power AMLPIndiana
Indianapolis Power & LightIndiana
Indiana Michigan Power CompanyIndiana,Michigan
Alliant Energy (Interstate Power & Light)Iowa
Mid-American Energy CompanyIowa
Traer Municipality PowerIowa
Jackson EnergyKentucky
Choptank ElectricMaryland
Eversource UtilitiesMass, Connecticut, New Hampshire
DTE EnergyMichigan
City Of North St Paul MinMinnesota
Minnesota PowerMinnesota
Alexandria Power and LightMinnesota
Mississippi County Electric CooperativeMississippi
Co-Mo Electric Coop, Inc.Missouri
Northwestern Energy LLCMontana
Jersey Central Power and LightNew Jersey
Con EdisonNew York
New York State Electric & Gas CorporationNew York
PSE&GNew York, New Jersey
Edgecombe-Martin EMCNorth Carolina
American Electric PowerOhio, Michigan, Indiana
Salem ElectricOregon
City Of Ashland OROregon
Consumer Power Inc.Oregon
Emerald Peoples Utility DistrictOregon
Portland General ElectricOregon
Northwest Rural Electric Cooperative Pennsylvania
PPL ElectricPennsylvania
Aiken Electric Co-OpSouth Carolina
Blue Ridge Electric CooperativeSouth Carolina
South Carolina Gas & ElectricSouth Carolina
Cleveland UtilitiesTennessee
Volunteer Energy CooperativeTennessee
Price City UtilitiesUtah
Community Electric CooperativeVirginia
Dominion Virginia PowerVirginia
Southside Electric CooperativeVirginia
Appalachian Power CompanyVirginia
Avista Utilities CorpWashington
Franklin County PUDWashington
Kattitas PUDWashington
Peninsula Light Company WAWashington
Puget Sound EnergyWashington
Tacoma Power UtilitiesWashington
City of Stoughton UtilitiesWisconsin
Northwestern Wisconsin Electric CompanyWisconsin


Reach Us

Contact Us for Information and Sales

6 Waterview Drive, Shelton, CT 06484

(203) 954-0050

(800) 836-5920

Fax: (203) 954-0051