DDX1 series short-circuit current limiter Introduction: The DDX1 series short-circuit current limiter and its cabinet product DGXK2 large capacity high-speed current limiting switch device (short-circuit current limiter cabinet) is a flagship product that our company has been focusing on for more than 20 years, suitable for AC and DC transformation and distribution systems. The company has multiple independent patents related to this product. Since 1999, after multiple technological iterations, a full series of products have been formed with rated voltage of 3.6kV~40.5kV, rated current of 630A~6300A, rated short-circuit breaking current of 63kA~200kA, and full breaking time less than 10ms. The stability, reliability, and applicability of the products have been fully verified by thousands of projects. The DDX1 General perfectly combines directional micro explosion technology, high-voltage current limiting technology, electronic measurement and control technology, and high-voltage insulation technology, which can quickly limit and disconnect the short-circuit current before it reaches the expected peak value, effectively protecting the main power equipment such as generators and transformers from the impact of catastrophic short-circuit currents. At the same time, DDX1 can also be used to optimize the operation mode of the distribution system, achieving energy-saving and consumption reduction, improving power quality, and enhancing power supply reliability. The above products have passed all type tests such as high current breaking capacity, temperature rise, and EMC (electromagnetic compatibility) at the National High Voltage Electrical Quality Supervision and Inspection Center, and have been widely used in the transformation and distribution systems of large enterprises such as power grid companies, metallurgical systems, chemical industries, and power generation companies. Some technical indicators of DDX1 have reached or even exceeded international advanced levels. Features: 1. Belongs to the first half wave current limiter, with a full breaking time of less than 10ms; 2. The quick isolator and special high-voltage current limiting fuse adopt a fully sealed design, without action noise and splashing pollution, improving the reliability and environmental adaptability of the product; 3. The entire series of products have single isolator and single fuse configurations, simplifying the product structure and improving product reliability; 4. The current sensor adopts a built-in Rogowski coil, which simplifies the product structure, overcomes the high current saturation problem of traditional CT, and has good measurement accuracy under high short-circuit current; 5. Each phase is equipped with a set of high-voltage electronic controllers, which avoids the intermediate links of current signal and trigger signal transmission, and shortens the lead wire, improving detection and trigger efficiency and reliability. It can be controlled independently through phase separation, and can also achieve three-phase synchronous linkage through optional fiber optic interfaces; 6. The dual criteria of instantaneous short-circuit current value i and instantaneous short-circuit current steepness value di/dt are used to trigger, which improves the anti-interference ability and ensures the fast and reliable operation of the product; 7. The low-voltage side measurement and control unit is divided into intelligent and analog types, with linkage and action signal remote transmission functions. The output contact of the product can be used for the linkage tripping of circuit breakers, as well as for locking, remote signaling, alarm, etc; 8. Flexible installation and operation: It can be installed in phases or in high-voltage switchgear, together with isolation switches, circuit breakers, and other equipment, to form a DGXK2 high-capacity high-speed current limiting switch device (short-circuit current limiting cabinet); Can be used both indoors and outdoors; 9. Spare parts: Easy replacement of fuses and quick isolators Technical parameters: Rated voltage Ue: 3.6kV~40.5kV Rated current IE: 630A~6300A Rated short-circuit breaking current Iek: 200kA Full break time:<10ms Cutoff current/expected peak current: 15%~50% Current limiter body protection level: IP64 Auxiliary power supply: 220VAC or 220VDC/2A Single phase weight (related to Ue and IE): 45kg~92kg
Introduction: The DDX1 series short-circuit current limiter and its cabinet product DGXK2 large capacity high-speed current limiting switch device (short-circuit current limiter cabinet) is a flagship product that our company has been focusing on for more than 20 years, suitable for AC and DC transformation and distribution systems. The company has multiple independent patents related to this product. Since 1999, after multiple technological iterations, a full series of products have been formed with rated voltage of 3.6kV~40.5kV, rated current of 630A~6300A, rated short-circuit breaking current of 63kA~200kA, and full breaking time less than 10ms. The stability, reliability, and applicability of the products have been fully verified by thousands of projects. The DDX1 General perfectly combines directional micro explosion technology, high-voltage current limiting technology, electronic measurement and control technology, and high-voltage insulation technology, which can quickly limit and disconnect the short-circuit current before it reaches the expected peak value, effectively protecting the main power equipment such as generators and transformers from the impact of catastrophic short-circuit currents. At the same time, DDX1 can also be used to optimize the operation mode of the distribution system, achieving energy-saving and consumption reduction, improving power quality, and enhancing power supply reliability. The above products have passed all type tests such as high current breaking capacity, temperature rise, and EMC (electromagnetic compatibility) at the National High Voltage Electrical Quality Supervision and Inspection Center, and have been widely used in the transformation and distribution systems of large enterprises such as power grid companies, metallurgical systems, chemical industries, and power generation companies. Some technical indicators of DDX1 have reached or even exceeded international advanced levels.
