Guodian Nanrui NSR661RF-D motor protection and measurement device

Guodian Nanrui NSR661RF-D motor protection and measurement device

Function Configuration

The main functions of protection include:1）Differential protection (differential quick break, ratio differentialCTWire breakage judgment, magnetic balance differential);2）Two stage timed overcurrent protection;3)Inverse time overcurrent protection;4）Unbalance protection (consisting of two sections of negative sequence overcurrent protection, of which two sectionsCan choose inverse time overcurrent alarm or trip;5）Overload protection;6Overheating protection;7）Two stage zero sequence overcurrent protection;8）There is a flow closureLock voltage loss protection;9）Overvoltage protection;10）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.

differential protection

The differential protection of Guodian Nanrui NSR661RF-D motor protection and measurement device consists of differential current quick break protection and ratio differential protection. The action 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.