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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 Decommissioning Cutting Tool Test
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- Archive
- JFD surveys US vessels with the aim of providing further submarine rescue assurance to the US Navy
- JFD awarded contract by Navantia to support Spanish Navy’s new Submarine Rescue Mothership
- JFD awarded MOD Emergency Stores Support Receiving System contract
- JFD signs strategic partnership with Blue Tide Marine offering enhanced maritime capability into the Americas in the subsea domain
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- Divulged - Winter 2017
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- Divulged 2021 Edition 1
- UDT 2019
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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 |
