零序电流继电器零售价格 漏电电流继电器生产厂家
    由SD-ZB□系列剩余电流动作保护继电器和零序电流互感器组合，构成接地故障保护装置，适用于TN、TT和IT电网系统。通过接地电流互感器检测出接地零序漏电电流，经剩余电流动作保护继电器与设定值的比较和判别，及时发出动作信号，接通或断开报警回路，以避免事故的扩大，从而保证人员及设备的安全。
   The combination of SD-ZB□ series residual current transformer ａnd zero sequence current protection relay forms ground fault protection device, it applies to TN,TT ａnd IT power system. Via the ground current transformer to detect the ground leak current, the current protection relay compares the sensed current with the setting value ａnd issues operating signal timely, make or break the alarm circuit, to avoid the accident, ensure the safety of personnel ａnd equipment.




桑迪电器___零序电流继电器零售价格 漏电电流继电器生产厂家