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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
- 15-07-20 | Return to classroom training
- James Fisher Offshore ICLT test
- 2020 Heerema remote audit
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- Leading the way in driving the highest standards in safe diving operations
- Archive
- JFD world-first simultaneous build of submarine rescue vehicles
- JFD establishes JFD North America
- International women's day 2021
- JFD wins at the 2020 IMCA Awards
- Archive
- Divulged - Winter 2017
- Divulged - Summer 2017
- Divulged - Winter 2016
- Divulged - Summer 2018
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- Divulged - Winter 2019
- Divulged 2021 Edition 1
- UDT 2019
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- JFD exhibiting at UDT 2016
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- 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
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- JFD exhibiting at Europoltech
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- JFD is exhibiting at OTC 2018
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- JFD is exhibiting at ADIPEC 2017
- Come see JFD at DSEI!
- See JFD at IMDEX Asia 2019
- JFD is at Oil & Gas Asia 2019
- Experience DSEI with JFD
- 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 |
