Guodian Nanrui NSR641RF-DT backup power automatic switching device

Guodian Nanrui NSR641RF-DT backup power automatic switching device

Function Configuration

The main functions of the protection of the backup power supply automatic switching device of Guodian Nanrui NSR641RF-DT include:1）Segmented self investment;2）Incoming line interconnection（NSR641RF-DLSpecial);3）Transformer interconnection（NSR641RF-DT(Special)4）Overload reduction;5）Segmented overvoltage protection for section I, overcurrent protection for section II, and post acceleration protection;6﹚Segmented zero sequence overcurrent and acceleration after zero sequence overcurrent.

The main functions of measurement and control include:1）32 Road remote signal input acquisition, device remote signal displacementSOErecord;

Basic Logic of Self Investment

1 Voltage: Busbar voltage refers to the voltage between the two lines of the busbarUabTheUbcAt least one of them is greater than the rated voltage of the busbar; Incoming voltage fingerincoming linePTIf the phase voltage or line voltage is higher than the rated voltage of the incoming line (if there is no incoming line available on site)PT, can exit according to the control wordCriteria for incoming voltage).

2 No voltage: Busbar no voltage refers to the voltage of the two lines of the busbarUabTheUbcAll are less than the rated value of the busbar without voltage.

3 No current: No current in the incoming line refers to a phase current of the working power supply's incoming line connection device being less than the rated value of no current in the incoming line.

4 Backup automatic switching action and whole group reset: the working power supply meets the condition of no voltage and current, the backup power supply meets the condition of voltage, and the backup automatic switching entersWhen the entire group is reset, if the working power supply meets the condition of no current during the reset time, it will automatically switch on. Otherwise, when the entire group returnsBetween (fixed as)50s）After arrival, prepare for self discharge.

Segmented self investment

Segmented automatic switching is mainly used in single busbar segmented terminal substations, such as segmented backup automatic switching on the load side of the main transformer and bridge backup automatic switching on the power sidecast