- Protection, Automation & Control
- Protection & Control
- Digital Substation
- Energy Management
- Power Stability Control
- Software Kit
Transmission Line Protection
PCS-9250 DC Yard Electronic Transformer
NR provides DC ECT, EVT and filter imbalance ECT for both LCC-HVDC and VSC-HVDC transmission projects. The DC electronic transformers have advantages of small size, light weight, no ferromagnetic resonance problem.
DC Electronic CT
DC electronic CT is used in HVDC converter station to convert the DC current and supply the signals to control and protection devices. The DC electronic current transformer is composed of converter, air-core coil, remote-end module, optical insulator and merging unit. The digital outputs of DC electronic CT is transmitted by optical fibers.
DC Electronic Voltage Transformer
DC electronic VT is used to convert and transmit DC voltage signals to control and protection devices in the converter station. The precise resistor voltage divider is used to convert DC voltage based on equipotential shielding technology. The use of shunt capacitor voltage divider can realize equalized voltage distribution and ensure its frequency characteristics. The remote end module locally collects and transmits signals via optical cables. The composite insulator is used to achieve reliable insulation.
DC Filter Imbalance Electronic Current Transformer
PCS-9250 series DC filter imbalance electronic CT uses the low power CT (LPCT) to convert primary current to digital signals. It is composed of LPCTs, remote-end modules, fiber optic insulators and merging units. The output signals of LPCT are processed by the remote-end module and transmitted via optical fibers.