Solid-state DC breakers provide protection against short-circuit situations
Astrolkwx B.V.

The primary and most important function of the Astrol solid-state DC breaker is its ultra-fast interruption of high powers, thereby preventing the dramatic consequences of short-circuit situations. It is proven as the optimal solution for enabling multi-bus and ring systems. Since our solid-state breakers have demonstrated their capability in multiple applications, serving as bus tie and enabling zone protection in multi-bus and ring systems.

Our ultra-fast series of water-cooled DC breakers for the maritime industry are available with a rated voltage of 1.5kV and a rated current between 0.35 kA and 5 kA.

Best in category di/dt capability allowing ultra-fast switch-off
The IGBT technology in combination with MOV guarantees ultra-fast switch-off times. A short-circuit is detected within 2µs, and IGBT switch-off takes less than 4µs. The DC Breaker is able to detect, clear and separate short-circuits from healthy system parts before they reach dangerous levels. Depending on the rating of the DC breaker and inductance of the system a total clearing time of 10 – 21 microseconds is feasible.
For a typical inductance of 4 μH:
• Breaking time: 8 μs
• Clearance time: 7 - 13.4 μs

Innovative marine system integrators choose our IGBT-based solution for the following reasons:
• Applicability in low inductance circuits without any added inductance
• Cut off current restricted from reaching damaging levels due to ultra-fast interruption (8 – 10 µs)
• DNV- and CCS certified
• System independent solution, applicable in any brand or type of drive systems
• Compact and modular design
• Wide current range from 0.35 – 5 kA nominal
• DC Voltage up to 1500 V DC nominal
• DC-ring zone protection with fault isolation and ride through capability during a short circuit for each current direction
• Single pole bi-directional

For more information visit Astrolkwx at booth 5110 or visit our website.

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