描述
1.高压电气保护
过流保护：
集成快速断路器或熔断器，可在毫秒级内切断短路电流（如牵引电机短路时的峰值电流），防止设备烧毁。
保护阈值可调（如500A-3000A），适配不同负载需求。
过压/欠压保护：
监测输入电压，当接触网电压波动超过±20%（如AC 25kV系统电压突升至30kV或跌落至20kV）时，自动断开电路并触发报警。
高压隔离：
采用气密式高压接触器或真空断路器，在维护时可手动或远程断开高压回路，确保人员安全。
2.信号监测与传输
状态反馈：
通过数字量输出（DO）传输断路器分合状态、故障代码等信息至列车控制系统（TCMS），支持实时监控。
部分型号可能集成模拟量输入（AI），监测电流、电压、温度等参数，用于数据分析或预测性维护。
通信接口：
支持CAN总线、MVB（多功能车辆总线）或以太网，与列车网络无缝对接，实现远程配置与诊断。
3.环境适应性
抗振动与冲击：
通过加固结构、减震橡胶等设计，适应轨道交通车辆运行中的高频振动（5-200Hz）和冲击（如列车启动/制动时的加速度变化），符合IEC 61373 Category 2 Class A标准。
宽温与防护：
工作温度范围-50℃~+90℃，满足西伯利亚高寒地区或中东高温沙漠运行需求。
防护等级IP67/IP68（防尘防水），可短期浸水（如通过积水路段）而不损坏。
电磁兼容（EMC）：
符合EN 50121-4标准，抗轨道交通复杂电磁干扰（如接触网电弧、牵引电机谐波）。
4.模块化与智能化
标准化设计：
采用ISO标准高压接头、螺纹连接或快插式接口，便于快速更换或扩展，减少停运时间。
自诊断功能：
集成微处理器（MCU），实时监测元件状态（如接触器触点磨损、熔断器熔断），通过LED指示灯或通信接口提示故障类型。
关键技术参数
1.电气参数
参数典型值说明
额定电压DC 750V/1500V/3000V
AC 25kV/50kV根据应用场景选择（地铁常用DC 1500V，干线铁路常用AC 25kV）
额定电流500A-3000A（持续）牵引系统用元件电流较高
短路分断能力≥50kA（AC 25kV系统）快速切断极端故障电流
绝缘电阻≥500MΩ（5000V DC测试）高压环境下的安全保障
介电强度10kV AC/1min（线间）验证高压绝缘性能
响应时间≤2ms（过流保护）比传统元件快3倍
保护动作时间≤10ms（过压/欠压保护）快速响应电压异常
2.机械参数
参数典型值说明
尺寸300mm×200mm×120mm（长×宽×高）紧凑设计，节省高压柜安装空间
重量≤6.5kg铝合金外壳+工程塑料，轻量化
安装方式面板安装/导轨安装灵活适配不同高压设备布局
振动等级IEC 61373 Category 2 Class A满足干线铁路振动标准
冲击耐受50g（11ms半正弦波）适应列车碰撞等极端冲击
3.环境参数
参数典型值说明
工作温度-50℃~+90℃适应极端气候
存储温度-60℃~+120℃长期存放不损坏
湿度5%-95%RH（无凝露）防止潮湿导致短路
盐雾耐受240h（IEC 60068-2-52）满足沿海地区使用要求
海拔适应性≤5000m适应高原铁路（如青藏铁路）
1.High voltage electrical protection
Overcurrent protection:
Integrated fast circuit breakers or fuses can cut off short-circuit currents(such as peak current when the traction motor is short-circuited)in milliseconds to prevent equipment from burning.
The protection threshold is adjustable(such as 500A-3000A),which is suitable for different load requirements.
Overvoltage/undervoltage protection:
Monitor the input voltage and automatically disconnect the circuit and trigger an alarm when the contact network voltage fluctuates more than±20%(such as the AC 25kV system voltage rises to 30kV or falls to 20kV).
High voltage isolation:
It adopts an air-tight high-pressure contactor or a vacuum circuit breaker,and the high-pressure circuit can be manually or remotely disconnected during maintenance to ensure personnel safety.
2.Signal monitoring and transmission
Status feedback:
Through digital output(DO),the circuit breaker split-combination status,fault code and other information are transmitted to the train control system(TCMS),and real-time monitoring is supported.
Some models may integrate analog input(AI)to monitor current,voltage,temperature and other parameters for data analysis or predictive maintenance.
Communication interface:
Supports CAN bus,MVB(multi-function vehicle bus)or Ethernet,seamlessly connects with the train network to achieve remote configuration and diagnosis.
3.Environmental adaptability
Vibration and shock resistance:
Through reinforced structure,shock-absorbing rubber and other designs,it can adapt to high-frequency vibration(5-200Hz)and impact(such as acceleration changes during train start/brake),and comply with IEC 61373 Category 2 Class A standard.
Wide temperature and protection:
The operating temperature range is-50℃~+90℃,meeting the operating needs of high-temperature deserts in Siberia or the Middle East.
Protection level IP67/IP68(dust-proof and waterproof),can be immersed in water for a short period of time(such as through water-stabilized sections)without damage.
Electromagnetic compatibility(EMC):
Comply with EN 50121-4 standards,and resists complex electromagnetic interference in rail transit(such as contact grid arcs,traction motor harmonics).
4.Modularity and intelligence
Standardized design:
It adopts ISO standard high-pressure connectors,threaded connections or quick plug-in interfaces for quick replacement or expansion and reduces downtime.
Self-diagnosis function:
Integrated microprocessor(MCU)monitors component status in real time(such as contact wear,fuse fuse)and prompts for fault type through LED indicators or communication interfaces.
3.Key technical parameters
1.Electrical parameters
Parameters Typical Description
Rated voltage DC 750V/1500V/3000V
AC 25kV/50kV is selected according to the application scenario(DC 1500V is commonly used in subways,AC 25kV is commonly used in mainline railways)
Rated current 500A-3000A(continuous)The components used in the traction system are relatively high
Short circuit breaking capability≥50kA(AC 25kV system)Quickly cut off extreme fault current
Insulation resistance≥500MΩ(5000V DC test)Safety guarantee in high voltage environment
Dielectric strength 10kV AC/1min(between lines)Verify high voltage insulation performance
Response time≤2ms(overcurrent protection)3 times faster than traditional components
Protection operation time≤10ms(overvoltage/undervoltage protection)Quick response to voltage abnormality
2.Mechanical parameters
Parameters Typical Description
Dimensions:300mm×200mm×120mm(Length×Width×Height)Compact design,saving high-voltage cabinet installation space
Weight≤6.5kg Aluminum alloy shell+engineering plastic,lightweight
Installation method Panel installation/rail installation Flexible adaptation to different high-voltage equipment layouts
Vibration level IEC 61373 Category 2 Class A Meets the vibration standards of the main railway
Impact tolerance 50g(11ms semi-sine wave)to adapt to extreme impacts such as train collisions
3.Environmental parameters
Parameters Typical Description
Operating temperature-50℃~+90℃to adapt to extreme climates
Storage temperature-60℃~+120℃,long-term storage without damage
Humidity 5%-95%RH(no condensation)to prevent short circuits from moisture
Salt spray tolerance 240h(IEC 60068-2-52)meets the requirements for use in coastal areas
Altitude adaptability≤5000m Adaptable to plateau railways(such as Qinghai-Tibet Railway)
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