DC12 to 40.5kV Short-Circuit Current Limiter
| Brand | Rw Energy |
| Model NO. | DC12 to 40.5kV Short-Circuit Current Limiter |
| Rated voltage | 15kV |
| Rated normal current | 1250A |
| Rated frequency | 50/60Hz |
| Series | DDX1-DC |
Product Introduction
The DC Short-Circuit Current Limiter shares the same fast-acting mode and interruption principle as the DDX1 AC product: it limits and interrupts the short-circuit current before the instantaneous value of the short-circuit current rises to the expected peak. The maximum instantaneous value of the actual short-circuit current is much lower than the peak value of the first major half-cycle of the short-circuit current, providing an economical and reasonable short-circuit current solution for DC users in power systems.
Its differences from the AC product lie in three aspects: (1) Sensor; (2) Electronic controller; (3) Fuse.
Product Features & Advantages
Main technical parameters
serial number |
Parameter Name |
unit |
Technical parameters |
|
1 |
Rated voltage |
kV |
12-40.5 |
|
2 |
Rated current |
A |
630-6300 |
|
3 |
Rated expected short-circuit breaking current |
kA |
50-200 |
|
4 |
Current limit coefficient = cut-off current / expected short-circuit current peak |
% |
15~50 |
|
5 |
Insulation level |
Power frequency withstand pressure |
kV/1min |
42-95 |
Lightning impact withstand pressure |
kV |
75-185 |
||
Product Usage
Protection of DC transmission and distribution systems
Fast protection of DC system cables, power electronics
The core current limiting principle is similar, but the control logic and arc extinguishing structure are optimized for DC characteristics and cannot be directly interchanged.
DC has no natural zero crossing point, making it more difficult to disconnect. This product adopts high-speed mechanical and power electronic composite technology to ensure reliable current limiting and cutting off within a few milliseconds.
Yes, specifically designed for DC 12kV to 40.5kV systems, solving the problem of short-circuit current limitation in DC scenarios such as photovoltaics, energy storage, and rail transit.
