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NSR600RF-D series protection, measurement and control devices have a wide range of applications. They are not only suitable for substations with 110kV and below voltage levels in the power system, but also suitable for switchyards in power plants and hydropower stations, and also suitable for substations with people on duty, few people on duty or no people on duty; It is not only suitable for the integrated automation system of new substations, but also suitable for the automation transformation of conventional substations (old substations); The substation automation system can not only be formed in the form of centralized group board, but also can be formed in the form of fully decentralized or both local decentralized mode; It can not only build a transformer with relatively separate configuration for protection and monitoring

2023/06/14 15:13:03

Scope of Application of the NSR600RF-D Series Protection and Measurement Device The NSR600RF-D Series Protection and Measurement Device has a wide range of applications, which is not only applicable to substations with 110kV and below voltage levels in the power system, but also applicable to switchyards in power plants and hydropower stations, as well as to substations with or without people on duty; It is not only suitable for the integrated automation system of new substations, but also suitable for the automation transformation of conventional substations (old substations); It can not only form the substation automation system in a centralized way, but also form the substation in a fully decentralized or both local decentralized mode

2023/06/14 15:12:10

Scope of Application of the NSR600RF-D Series Protection and Measurement Device The NSR600RF-D Series Protection and Measurement Device has a wide range of applications, which is not only applicable to substations with 110kV and below voltage levels in the power system, but also applicable to switchyards in power plants and hydropower stations, as well as to substations with or without people on duty; It is not only suitable for the integrated automation system of new substations, but also suitable for the automation transformation of conventional substations (old substations); It can not only form the substation automation system in a centralized way, but also form the substation in a fully decentralized or both local decentralized mode

2023/06/14 15:10:00

Scope of Application of the NSR600RF-D Series Protection and Measurement Device The NSR600RF-D Series Protection and Measurement Device has a wide range of applications, which is not only applicable to substations with 110kV and below voltage levels in the power system, but also applicable to switchyards in power plants and hydropower stations, as well as to substations with or without people on duty; It is not only suitable for the integrated automation system of new substations, but also suitable for the automation transformation of conventional substations (old substations); It can not only form the substation automation system in a centralized way, but also form the substation in a fully decentralized or both local decentralized mode

2023/06/14 15:08:49

The front panel of the device indicates that the front panel of the device is composed of a LCD board and a CPU board. Open the front door of the device to see that the LCD module is inserted on the CPU module. LCD module adopts wide temperature type large screen display, with large amount of information displayed and friendly interface. The background color is blue, and you can control whether the word is on or off. When normal, the LCD will scroll to display the protection voltage and current, measure the current and power, device model and version number. When an alarm or protection event occurs, the device will automatically start the LCD to highlight the alarm or action information until the signal is reset. A、 LCD backlight enabling/disenabling unit setting → normally on

2022/07/12 14:03:39

1.1 Overload protection Alarms or trips when the large phase current is greater than the overload current setting value and reaches the overload time limit. 1.2 Negative sequence overcurrent protection Negative sequence overcurrent protection is configured with one definite time limit and four inverse time limits, and specific action time limit can be selected through the control word. 1.3 Reverse power protection The reverse power protection adopts the calculated active power participation criterion, and provides the setting value of "reverse power protection direction" to increase the flexibility in use. 1.4 The small current grounding protection control word "small current grounding criterion" is set to "0": zero voltage or zero current, that is, any of them will act when exceeding the fixed value. Control word "Low current grounding criterion..."

2022/04/14 16:26:36

The one point grounding protection of the generator rotor on the DGT801UB power board GKD2054 of Guodian Nanzi adopts the injection and switching sampling principle to calculate the insulation resistance of the rotor main shaft to the ground, which is applicable to the excitation circuit of the generator in various non rotating excitation modes. The rotor insulation resistance can also be measured in the non excitation state. Fixed value of grounding resistance: range 0.5K? ～ 100K?， The error is not more than ± 10% or ± 0.5K? Delay setting value: the range is 2s~100s, and the setting value of the second harmonic voltage of the generator rotor two point grounding protection: the range is 0.1V~50V, and the error is not more than ± 5% or ± 0.1V delay setting value

2021/09/14 16:29:31

The DGT801A generator protection device DGT801U series digital generator transformer unit protection device of Guodian NARI is applicable to the generator transformer unit protection of steam turbine units, gas turbine units, nuclear power units and water turbine units of various capacities and connection modes with the capacity of 1200MW and below and the voltage level of 1000KV and below, and meets the requirements of the electric monitoring automation system of the power plant. DGT801U-B (or C, D, E) device can complete several main protections, several abnormal operation protections and backup protections, and its protection functions can be flexibly selected as required. DGT801U-F（...

2021/09/04 10:25:16

National Power NARI NSP715 Optical Fiber Differential Protection Device 1.1 Scope of Application NSP715-R Line Protection Device is applicable to lines and feeders of indirectly grounded or grounded through small resistance systems with voltage levels below 110kV, and has measurement and control functions. It can be installed in the switch cabinet separately or in the control room in a centralized way. The pilot channel used for protection can be a dedicated optical fiber or a multiplex channel. The device supports 2048kbit/sE1 interface. 1.2 Function configuration 1.2.1 Protection function 1) Optical fiber line differential protection 2) Three section phase overcurrent protection 3) Phase overcurrent inverse time protection

2021/07/05 15:22:07