Product Introduction

The DDX1 Short-Circuit Current Limiter (abbreviated as: Current Limiter) is a high-speed switch with short-circuit current breaking capability. It can completely interrupt the short-circuit current within 10ms after a short-circuit fault occurs, before the instantaneous value of the short-circuit current rises to the expected peak.It integrates fast cutting technology, high-voltage current limiting technology, electronic measurement and control technology, and high-voltage insulation technology. This integration enables rapid current limiting and breaking of short-circuit currents in power generation, distribution, and consumption systems, preventing key power equipment such as generators and transformers from being impacted by catastrophic short-circuit currents.At the same time, it can also optimize the operation mode of the distribution system, achieving the effects of energy conservation and consumption reduction, improving power quality, and enhancing power supply reliability.

Product Features and Benefits

• Strong short-circuit breaking ability (large capacity): rated breaking short-circuit current 50kA~200kA.

• Fast breaking speed (high speed): full breaking time less than 10ms.

• The breaking process has obvious current limiting characteristics (current limiting).

• The action criterion adopts the instantaneous value of current and the instantaneous value of current change rate.

• The current sensor is integrated with the fast isolator, and the structure is simplified.

• The electronic controller works independently in three phases through high temperature and strong interference tests to ensure the overall reliability of the product.

Electrical parameters

Product Usage

• Bypass current limiting reactor (energy saving and consumption reduction, eliminating reactor reactive power, and improving power supply quality).

• Parallel operation of segmented buses in large-capacity power distribution system (optimizing load distribution and reducing network impedance).

• Short-circuit protection at generator outlet or low voltage side of transformer.

•  Short-circuit protection for power plant branch buses and plant high variations.