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 Utilities Alabama
ENMAX, Calgary Alberta CA Alberta, CA
Arizona Public Service Arizona
North Little Rock Electric Department Arkansas
City of Azusa, CA California
Pacific Gas & Electric California
SMUD California
City of Gunnison CO Colorado
San Miguel Power Assn, Inc. Colorado
Xcel Energy Colorado, Minnesota, Wisconsin
Delaware Electric Coop Delaware
Delmarva Power & Light CO Delaware, Maryland, Virginia
Florida Power & Light Company Florida
Cobbs EMC Georgia
Georgia Power Georgia
Jackson Electric Membership Corporation Georgia
City Of Weiser, Idaho Idaho
Ameren Illinois
Commonwealth Edison Illinois
Anderson Municipal Light Power AMLP Indiana
Indianapolis Power & Light Indiana
Nipsco Indiana
Indiana Michigan Power Company Indiana,Michigan
Alliant Energy (Interstate Power & Light) Iowa
Mid-American Energy Company Iowa
Traer Municipality Power Iowa
Jackson Energy Kentucky
Choptank Electric Maryland
PEPCO Maryland
Eversource Utilities Mass, Connecticut, New Hampshire
DTE Energy Michigan
City Of North St Paul Min Minnesota
Minnesota Power Minnesota
Alexandria Power and Light Minnesota
Mississippi County Electric Cooperative Mississippi
Co-Mo Electric Coop, Inc. Missouri
Northwestern Energy LLC Montana
Jersey Central Power and Light New Jersey
Con Edison New York
New York State Electric & Gas Corporation New York
PSE&G New York, New Jersey
Edgecombe-Martin EMC North Carolina
American Electric Power Ohio, Michigan, Indiana
Salem Electric Oregon
City Of Ashland OR Oregon
Consumer Power Inc. Oregon
Emerald Peoples Utility District Oregon
Portland General Electric Oregon
Northwest Rural Electric Cooperative  Pennsylvania
PPL Electric Pennsylvania
Aiken Electric Co-Op South Carolina
Blue Ridge Electric Cooperative South Carolina
South Carolina Gas & Electric South Carolina
Cleveland Utilities Tennessee
EPB Tennessee
Volunteer Energy Cooperative Tennessee
Price City Utilities Utah
Community Electric Cooperative Virginia
Dominion Virginia Power Virginia
Southside Electric Cooperative Virginia
Appalachian Power Company Virginia
Avista Utilities Corp Washington
Franklin County PUD Washington
Kattitas PUD Washington
Peninsula Light Company WA Washington
Puget Sound Energy Washington
Tacoma Power Utilities Washington
City of Stoughton Utilities Wisconsin
Northwestern Wisconsin Electric Company Wisconsin


Reach Us

Contact Us for Information and Sales

6 Waterview Drive, Shelton, CT 06484

(203) 954-0050

(800) 836-5920

Fax: (203) 954-0051