ZRCT P921 PT保护
ZRCT P921 PT protection

功能Function
■测量功能：测量PT回路的三相电压、零序电压；记录保护动作次数等数据，通过装置本身的液晶显示屏实时显示出来。装置的测量精度可以通过显示模块进行调整，出厂前，UA、UB、UC、U0（当使用零序PT时）可以通过“测量参数”菜单修改通道系数，使测量精度达到最佳。
Measurement function: Measure the three-phase voltage and zero-sequence voltage of PT circuit. Record the number of protection actions and other data, and display it in real time through the LCD screen of the device itself. The measuring accuracy of the device can be adjusted by the display module.Before delivery, UA, UB, UC and U0 (when using zero-order PT) can modify the channel coefficient through the "measurement parameters" menu to achieve the best measurement accuracy. 
■保护功能：低压I段、低压II段、过电压保护、零序电压保护、PT断线闭锁保护。   
Protection function: Low Voltage I, Low Voltage II, Overvoltage Protection, Zero Sequence Voltage Protection, PT Break Blocking Protection.     
■信号采集及控制功能：20路开关量输入、5路继电器输出。
Signal acquisition and control functions: 20-way switch input and 5-way relay output.
■扩展功能：电压并列
Extended functions: Voltage juxtaposition

外形和开孔尺寸Shape and hole size
外形尺寸:162mm(w)x184mm(h)x150mm(d)
开孔尺寸:160mm(w)x151mm(h)
Dimension: 162mm (w) x184mm (h) x150mm (d) 
Hole size: 160mm (w) x 151mm (h)