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.
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
配电线路损耗采集模块用于实现间隔电能采集功能,实时计量线路上的电能数据包括:正向和反向有功功率计算和四相极限无功功率计算,从而实现双向计量子功能并支持定位功能;
- 小电流接地故障判断和定位功能
控制单元通过对相电流互感器和零序电流互感器的数据分析和采集,利用各种算法区分这些特征量,从而准确定位故障发生区域;
故障记录功能
通过每周 128 个采样点,完整记录故障发生前 4 个周期和故障发生后 8 个周期内各通道的波形和开路位置等远程信号信息,并发送到辅助站进行故障原因分析,支持循环存储 64 条故障记录。
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- 采用电压时间电磁机构或常规枪管操作机构;
- 具备常规保护、电压和电流类型、分布式智能FA功能;
- 采用“集中式和分散式”控制终端,直观易用;
- CVT电子电压传感技术;
- 隔离刀与真空断路器之间的联动装置:
- 超级电容器备用电源,整个生命周期内无需维护;
- 断路器/负载开关可安装在任何机柜中,灵活方便。
- 为满足馈线自动化要求,控制器以线路电压为标准,通过延时合闸和变电站保护实现现场故障处理,无需电池,无需依赖通信和主站,即可在现场实现完整的馈线自动化功能;
- 该设计消除了由电池等维护设备引起的系统不稳定;
- 配电网自动化系统功能分配清晰,操作简便:
- 采用频繁操作的负荷开关/断路器,以满足配电网自动、经济运行的要求;
- 真空灭弧,SF6气体外绝缘,无油设计;
- 三相接线盒布置、瓷质电缆铸造出口、全密封机构、军用级航空插头以及整体全密封技术,确保产品具有较强的耐候性、良好的防冷凝性能,并且15年无需维护;
- 内置隔离断路和真空断路器串联异步联动,切换能力强,安全性高;
- 可靠的密封性能:采用成熟的密封外壳技术,防护等级为IP67,外壳采用模塑拉伸一次成型工艺加工而成,易于密封箱体,气密性高,机械强度高;
- 免维护特性:负载开关/断路器的主电路、二次元件和操作机构均密封在SF6气体(零表压)中,不受外部环境影响,性能稳定可靠,免维护。

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