Guodian Nanrui NSR668RF-D Reactor Protection and Measurement Device

Guodian Nanrui NSR668RF-D Reactor Protection and Measurement Device

Function Configuration

The main functions of protection include:1）Differential protection (differential quick break, ratio differentialCTWire breakage judgment);2）Two fixed time limitsovercurrent protection3）Two stage zero sequence overcurrent protection;4）Overload protection;5）External non electric input protection.

The main functions of measurement and control include:1）23 Road remote signal input acquisition, device remote signal displacementSOErecord;2）Normal circuit breakerRemote control opening and closing;3）IaTheIcTheUaTheUbTheUcThe3IoTheUabTheUbcTheUcaThe3UoThePaThePbThePcThePTheQTheSTheCOSφTheFrwait18 Telemetry of an analog quantity;4）EventSOE；5）Programmed control and online five prevention measures

differential protection

The differential protection of Guodian Nanrui NSR668RF-D reactor protection and measurement device consists of differential current quick break protection and ratio differential protection. The operating characteristics are shown in the figure. The shaded area in the picture represents the actionDistrict,I_cdsd The above is the action zone of differential current quick break protection,I_cdqdThe area above the slope is the ratio differential protection action zone. Two protective usesA set of export contacts, using the same hard pressing plate, but with control words for input and output.I_cdsdTo determine the differential speed value,I_cdqdDifferential difference in ratioFlow fixed value.KThe differential protection ratio coefficient.

Differential current quick break protection

When any phase difference current exceeds the set value of differential quick break current, it will instantly act on the outlet relay as a serious fault within the differential protection rangeThe protection.CTWhen the wire is disconnected, the differential quick break protection is not locked.