ToughDuty Circuit Breaker Power/Vac ReplacementCBS MaxiVac’s™ new Tough Duty line of roll-in replacement circuit breakers replaces aging Power/Vac® breakers without any modifications to existing cells or switchgear. The Tough Duty™ breakers are tested per ANSI/IEEE certification standards, are available in all standard ratings, and include the newest replacement encapsulated pole assemblies from Vacuum Interrupters, Inc. Encapsulated poles harden your breakers against environmental contamination, extending the life of your power distribution equipment.

 


 

Tough Duty™ Circuit Breaker Advantages

 

    • Direct Roll-In Replacement
    • Meets or Exceeds ANSI/IEEE Testing Standards
    • 5-year, 3,000-Operation Warranty
    • New Rugged Encapsulated Vacuum Interrupter Pole Design
    • Mechanism Made In USA
    • Extended Warranties Available
    • Utilizes Trusted ML-17 and ML-18 Mechanisms

 

 

 

Tough Duty Embedded Pole

 

 


 

Tough Duty™ Circuit Breaker Benefits

Direct Roll-In Replacement. Roll-in replacement requires no cell or wiring modifications, avoiding switchgear replacement and downtime costs.

ANSI/IEEE C37 Tested. The circuit breaker has been tested to the latest applicable ANSI/IEEE C37 standards, including C37.09.

Mechanism Made In USA. Trusted ML-17 and ML-18 mechanisms have been remanufactured to ISO standards, including OEM recommendations and service advisories.

Safety First. Maintains existing maintenance and safety procedures; works with existing remote racking and switching equipment.

Repetitive Duty Upgrade. Need more than 3,000 operations? Ask about our Repetitive Duty Upgrade warranty.

Upgraded Pole Assemblies. New encapsulated pole assemblies are rugged, can extend existing interrupt capabilities, and have a longer service life than legacy pole designs.

 


 

Tough Duty™ Models & Ratings

Click to Download PDF with all Model & Rating Information

Click to Download PDF Order Form

Model Identification & Replacement Part Number

Replacement
Tough Duty
Part Number
Original Model
Number
Normal rms
Voltage Class (kV)
Normal 3-phase
Class (MVA)
VBTD-5-250-12VB-4.16-2504.16250
VBTD-5-250-20
VBTD-5-350-12VB-4.16-350350
VBTD-5-350-20
VBTD-8-500-12VB-7.2-5007.2500
VBTD-8-500-20
VBTD-15-500-12VB-13.8-50013.8500
VBTD-15-500-20
VBTD-15-750-12VB-13.8-750750
VBTD-15-750-20

 

Replacement Part Rated Values

  IdentificationRated Values
Replacement 
Tough Duty Part Number
VoltageInsulation LevelsCurrent
Rated Maximum Voltage (kV)Rated Voltage Range Factor (K)Rated Withstand Test VoltageContinuous
rms Current
Ratings
(A)
Short
Circuit rms
Current
Rating (at
Rated
Max kV)
(kA)
Low
Frequency
rms
Voltage
(kV)
Crest
Impulse
Voltage
(kV)
VBTD-5-250-124.761.241960120029
VBTD-5-250-202000
VBTD-5-350-121.19120041
VBTD-5-350-202000
VBTD-8-500-128.251.253695 120033
VBTD-8-500-202000
VBTD-15-500-12151.3120018
VBTD-15-500-202000
VBTD-15-750-12120028
VBTD-15-750-202000

 

Replacement Part Related Required Capabilities

Identification Related Required Capabilities
Replacement Tough Duty Part NumberMaximum Symmetrical Interrupting
& 3-sec Short Time 
Capability Rating (kA)
Closing and Latching Capability 
rms Current (kA)
VBTD-5-250-123658
VBTD-5-250-20
VBTD-5-350-124978
VBTD-5-350-20
VBTD-8-500-124166
VBTD-8-500-20
VBTD-15-500-122337
VBTD-15-500-20
VBTD-15-750-123658
VBTD-15-750-20

 

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