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- 24-03-20 | Essential staff at JFD UK sites only
- 19-03-20 | Update on continuity of operations from JFD
- 19-03-20 | Temporary suspension of Training courses
- Leading the way in driving the highest standards in safe diving operations
- Indian Navy Submarine Rescue System
- Black Carillon
- JFD successfully undertakes simultaneous operation [SIMOPS]
- Archive
- JFD launches new ventilator system
- JFD acquires Fathom Systems
- JFD Australia secures major contract extension to supply submarine rescue system
- JFD continues investment programme in India
- Archive
- Divulged - Winter 2017
- Divulged - Summer 2017
- Divulged - Winter 2016
- Divulged - Summer 2018
- Divulged - Winter 2018
- Divulged - Winter 2019
- UDT 2019
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- JFD is exhibiting alongside James Fisher Nigeria at NOG
- JFD exhibiting at UDT 2016
- Visit JFD at Underwater Intervention 2019
- JFD is participating at Underwater Defence & Security
- See JFD at this year’s IMCA Annual Seminar
- JFD is exhibiting at LAAD Defence & Security 2019
- JFD LEXMAR is exhibiting at OSEA 2016
- JFD is exhibiting at Subsea Expo 2017
- Visit JFD at Indo Defence 2018 Expo and Forum
- Visit JFD on stand 403 at Underwater Intervention 2017
- JFD exhibiting at Europoltech
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- Visit JFD at UDT 2017
- Visit JFD at DSEI 2017
- JFD is exhibiting at OTC 2018
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- Come see JFD at DSEI!
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- JFD is at Oil & Gas Asia 2019
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- See JFD's full defence capability at MSPO 2019
- JFD is exhibiting at this year's Offshore Europe
- Visit us on stand 2S16 at Pacific
- See JFD at ADIPEC on stand 13572
- Explore our commercial capabilities at Bergen International Diving Seminar
- JFD showcasing commercial and defence capabilities at Underwater Intervention
- JFD exhibiting alongside James Fisher Offshore at Subsea Expo
Ultrathermics circuit breaker
Highly acclaimed, the robust Ultrathermics circuit breaker is now fitted to most diving control systems around the world.
The totally enclosed design offers full protection to the surface operator from unintentional contact whilst also shielding them from the visual arc spark during the breaking of the circuit. The single switching action breaks both poles of supply thereby rendering the cutting / welding equipment safe.
The Ultrathermics circuit breaker is a two pole, 630 amp AC or DC circuit breaker for direct surface control of underwater cutting and welding operations.
| Item | Order Code |
| Ultrathermics 630 circuit breaker 630 AMP | UL148 |
| Ultrathermics 400 circuit breaker 400 AMP | UL149 |
| Ultrathermics 250 circuit breaker 250 AMP | UL150 |
| Type | Document | Download |
| Datasheet | Ultrathermics circuit breaker | |
| Drawing | Circuit breaker 630A | UL148S1 R0 |
| Drawing | Circuit breaker 400A | UL149S1 R0 |
| Item | Order Code |
| Ultrathermics 630 circuit breaker 630 AMP | UL148 |
| Ultrathermics 400 circuit breaker 400 AMP | UL149 |
| Ultrathermics 250 circuit breaker 250 AMP | UL150 |
| Type | Document | Download |
| Datasheet | Ultrathermics circuit breaker | |
| Drawing | Circuit breaker 630A | UL148S1 R0 |
| Drawing | Circuit breaker 400A | UL149S1 R0 |
