Outdoor Substation Breaker
ENGINEERED TO YOUR UNIQUE SPECIFICATIONS & BUILT WITH SUPERIOR QUALITY
Premier Customer Service
Detailed Engineering & Technical Support
Industry Leading Lead Times

Fast Response

Flexible Solutions
Dedicated Project Managers
Premier Customer Service
Whether it is for an initial request, products in manufacturing or after sales service. We are here for you. Our experts are available both on- and offline, quick and thorough to respond and ready to answer any question you have
Short Lead Times / Industry Leading Lead Times
Time is almost always of the essence. Our streamlined production and strategically planned supply chain ensures that you get your gear on time, de-risking your project and giving you certainty in execution.
Fast Response
In line with our customer service speed and efficiency are issues important to us. Our fast response time extends to questions, clarifications to any project and service related issue. Unsure which expert is the right one to contact? Not to worry, we will be happy to connect you.
Flexible Solutions
We meet industry standards but are not constrained by standard solutions. If you have specific requests or more uncommon designs we are flexible in accomodating them. Not sure if it will work? Feel free to ask us anything.
Dedicated Project Managers
Ownership and accountability are words we take seriously – and they are reflected in our project management approach: hands on and professional. All our project managers are engineers and many are certified project management professionals. Whether it is the project plan, shopfloor or site, our project managers ensure that everything is in order and on time.
Detailed Engineering & Technical Support
Our gear is designed and built by experts for experts. Our engineering and R&D teams ensure the highest level of support, to meet your specifications and requirements. Value engineering is as important to us as it is to you – we will frequently suggest improvements, when and where they can be made.

We Will Never Force A Solution. We Will Engineer The Answer.
We continually work to create products with higher efficiencies and better value. Each year we make substantial investments in the research & development of new products and manufacturing techniques.
We regularly innovate on behalf of our customers, collaborating with them to find solutions to their specific challenges.


Outdoor Substation Breaker
The OD3Mag™ is the first MV Substation Breaker that allows the choice of 1-phase or 3-phase operation.
This feature allows you the performance and ratings of a circuit breaker and the functionality of a recloser. By tripping individual phases in distribution systems, utilities are able to improve their SAIDI and SAIFI scores and enhance the resiliency of their network.
Standard Features
- Up to 15KV, 2000A, 31.5kA
- Magnetically Actuated Breaker
- Single-Phase Capability with Independent Pole Actuators
- Extra Creep Bushings
- Overhead Lift Standard
- Padlock Provision
- Lift-out Breaker for Easier Upgrades/Repairs
- LV Control Instrument Panel Swing Door
- Adjustable Leg Heights
- Minimal Number of Enclosure Penetrations Prevents Leaks
- Lift Off Doors
Optional Features
- Single-Phase or 3-Phase Operation and Lockout
- Instrumental Door Provision for Relay Controls
- Forklift Lifting Provision
- Lift Out Breaker Feature
- Left or Right Door Swing
- Manual Trip Lever and Mechanical Lockout (69 Switch)
- CT and Ragowski Coil Options
- Up To 2 Sets Per Bushing
- Single and Multi Ratio CTs Available
RATINGS/CHARACTERISTICS OF THE OBJECT TESTED | |
Maximum voltage | 15.5 kV RMS |
Continuous current | 1250A / 2000A RMS |
Number of poles | 3 |
Voltage range factor K | 1 |
Power frequency | 60 Hz |
Power Frequency Withstand (dry/wet) | 50 kV / 45 kV |
BIL | 125 kV |
Standard operating duty | O-0.3s-CO-15s-CO |
Short-circuit current | 31.5 kA RMS |
Peak withstand current | 82 kA Peak |
Duration of short-circuit | 2 s |
Short-circuit making current | 82 kA |
Symmetrical interrupting capability | 31.5 kA RMS |
Asymmetrical interrupting capability | 43 kA RMS |
Interrupting time | 3 cycle |
Transient recovery voltage | 34.2 kV |
Control voltage | 48Vdc, 125Vdc, 120Vac |
Class | S2 |
CAPACITIVE SWITCHING | |
Maximum voltage | 15.5 kV RMS |
Number of poles | 3 |
Rated over headline current | 100 A |
Rated capacitor bank current (back-to-back) | 600 A |
Rated peak inrush | 6 kA |
Rated inrush frequency | 1.2 kHz |
Class | C2 |

MECHANICAL / ENVIRONMENTAL | |
Operation | 10,000 ops |
Maintenance Period | 10,000 ops |
Rated Minimum Operational Temperature | -40° F (-40˚ C) |
Rated Maximum Operational Temperature | 131˚ F (50° C) |
Rated IP | IP55, IK10 |
Enclosure Rating | NEMA 4 |


OD3Mag™ Dimensional Info
With the OD3Mag™ breaker, JST combines field proven magnetic actuation with independent pole operation to achieve the first ever single-phase capable substation circuit breaker.
The OD3Mag™ Breaker is designed to help improve utility SAIDI and SAIFI scores. With magnetic actuation, the breaker will reduce O&M requirements, improve performance, and provide consistent, reliable operation across it’s lifetime.
Lifting Provisions
- 1.06” diameter holes
- 4 lifting locations points welded to the roof
Bushings
- 15.5kV, 125kV BIL, Porcelain
- Extra Creep: 25.2″ Top, 18.3″ Bottom
- 1250A: 1 1/4″ – 12 threaded stud
- 2000A: 2 1/4″ – 12 threaded stud
NEMA 2-Hole Ground Pads
- 6 exterior grounding locations
- Roof: Welded, Aluminum
- Enclosure: Welded, Stainless Steel
Instrument Panel (Optional)
Swing open from left or right side
34.25” x 28.00”
The Advantage
In today’s challenging market, the OD3Mag™ offers an opportunity to improve system reliability, faster restoration times and better customer satisfaction.
OD3MAG Design Advantages
- Position Indicators for each pole
- Operation counter can be viewed from outside
- Minimum enclosure penetrations prevent water intrusion
- The welded roof design transfers weight of bushings and CTs to the cabinet side panels thereby reducing roof deflection and reducing water leakage issues
- Innovative gasket system ensures sealing around bushing entrance points under moments of flex from external forces
- Stainless steel door hanger on high voltage cabinet creates automatic grounding point and increases safety during removal and replacement of the door
- Optional Forklift provisions allow more convenient handling and installation of the breaker on site
- Helps utilities improve their SAIDI and SAIFI scores
- Robust cabinet design requires no visual inspections outside of 5 year recommended maintenance cycle
Advantages of Magnetic Actuation
- No lubrication or regular maintenance requirements on the actuator
- Direct drive of push rods eliminates structural torquing of break drive components
- Consistent operating time of the mechanism across entire rated temperature range and min/max operating voltages of the breaker
- Rare earth magnets lose <1 % of flux density over time, requiring no adjustments throughout breaker lifetime
- Actuator controls are self-monitoring and report breaker status at all times
- Quieter actuation compared to traditional spring-spring mechanism

DEDICATED TEAM
Meet The Experts
“The OD3MagTM breaker is the most exciting apparatus to enter the Smart Grid ecosystem in years. The interchangeability between single phase and three phase operating modes makes this a no-brainer for utilities making efforts to modernize their distribution network all the way back to the substation.”
“Our quality is your peace of mind. This promise extends from the initial delivery to when our products are in service. Feel free to send us any after sales service request you may have. We are here to help.”
“Engineered to value – this is reflected in the concise level of detail of our proposals and in the quality of our finished product.”
“We offer expert and end-to-end-support from the moment we receive your request until your switchgear is delivered.”
“Our switchgear is designed and tested according to industry standards, while reflecting best practices and learnings we have gathered as a manufacturer.”
“Are you looking for a quality response on your transformer and switchgear needs? JST is here for you: with our team of experts, proven track record and industry insight.”
Office Headquarters
30 Skyline Drive
Lake Mary, FL 32746
Sales@jstpower.com
Contact Us
+1 407-632-4050
844-631-9046 (Toll Free)