Product Introduction

The primary and secondary fusion of environmental protection gas ring network box is in response to the new standard of the State Grid "technical standards for primary and secondary distribution equipment" requirements of the introduction of intelligent complete sets of equipment, the integration of electromagnetic voltage, current transformer, electric energy metering module, high-speed fault transient wave and other technologies of complete sets of equipment, by the ring in and out of the unit, feeder unit, bus equipment (PT) unit, centralized DTU and connecting cables. It can collect active power, reactive power, power factor, frequency, zero sequence current and zero sequence voltage, and has the functions of line loss metering and electric energy metering, as well as line voltage identification, voltage overrun, load overrun and other alarm transmission, short-circuit fault detection and processing, single-phase grounding fault detection and processing functions, and supports short-circuit/grounding fault event transmission to meet the needs of distribution network automation.

Key Features

On the basis of the traditional DTU function, the metering-grade distribution line loss acquisition function is added, the judgment and location function of the low-current grounding fault are optimized, and the sampling frequency is increased, so that the waveform of the fault recording is closer to the real waveform.

◇ Line loss collection function

The distribution line loss acquisition module is used to realize the interval electric energy acquisition function, and the electric energy data on the real-time metering line includes: forward and reverse active power calculation and four-phase limit reactive power calculation, so as to realize the two-way metering sub-function and support the positioning function;

◇ Small current grounding fault judgment and positioning function

Through the data analysis and collection of phase current transformer and zero sequence current transformer, the control unit distinguishes these characteristic quantities through a variety of algorithms, so as to accurately locate the area where the fault occurs;

◇ Fault recording function

Through the sampling of 128 points per week, and the remote signaling information such as the waveform of each channel and the opening position of the 4 cycles before the fault and the 8 cycles after the fault are completely recorded, and sent to the auxiliary station for analysis of the cause of the fault, and the cyclic storage of 64 fault recordings is supported.

Key Features

◇ Adopt voltage-time electromagnetic mechanism or conventional barrel operating mechanism;

◇ With conventional protection, voltage and current type, distributed intelligent FA function;

◇ Adopt "centralized and decentralized" control terminal, intuitive and easy to use;

◇ CVT electronic voltage sensing technology;

◇ Linkage between isolation knife and vacuum interrupter:

◇ Supercapacitor backup power supply, maintenance-free throughout the life cycle;

◇ Circuit breaker/load switch can be used in any cabinet, flexible and convenient.

Features

◇ To meet the requirements of feeder automation, the controller takes the line voltage as the criterion, realizes on-site fault handling through delayed closing and substation protection, does not need batteries, does not rely on communication and master station, and can realize complete feeder automation functions on site;

◇ The system instability caused by maintenance devices such as batteries is eliminated in the design;

◇ Clear distribution of functions of distribution network automation system, easy to operate:

◇ Adopt frequent operation load switch/circuit breaker to meet the requirements of automatic and economical operation of distribution network;

◇ Vacuum arc extinguishing, SF6 gas external insulation, oil-free design;

◇ Three-phase co-box arrangement, porcelain cable casting outlet, fully sealed mechanism, military-grade aviation plug, and overall full sealing technology ensure that the product has strong weather resistance, good anti-condensation performance, and is maintenance-free for 15 years;

◇ Built-in isolation fracture and vacuum interrupter series asynchronous linkage, strong switching ability and high safety;

◇ Reliable sealing performance: with mature sealing shell technology, IP67 protection level, the body is processed by mold stretching one-time molding process, easy to seal the box, high air tightness, high mechanical strength;

◇ Maintenance-free features: The main circuit of the load switch/circuit breaker, the secondary components and the operating mechanism are all sealed in SF6 gas (zero gauge pressure), which is not affected by the external environment, and the performance is stable, reliable and maintenance-free.