Protection&Control Transmission Line Protection Busbar Protection Transformer Protection Circuit Breaker Protection Generator Protection Feeder Protection Capacitor Protection Motor Protection Transfer & Synchronization Arc Protection
Digital Substation PCS-221S Merging Unit PCS-221 Merging Unit PCS-222 Circuit Breaker Controller PCS-9250 AC Electronic CT/VT
Automation PCS-9700 Automation System PCS-9700 HMI Software PCS-9705 Bay Control Unit PCS-9705S Bay Control Unit PCS-9799 Station Manager PCS-9799S Station Manager PCS-9710 Remote Terminal Unit PCS-9710S Remote Terminal Unit PCS-9794 Protocol Converter PCS-9785 Satellite-Synchronized Clock PCS-9882 Ethernet Switch PCS-9882Rx DIN Rail Managed Ethernet Switch PCS-9882XD Managed Ethernet Switch PCS-9884 Managed Ethernet Switch Supporting HSR and PRP MUX-2M/64 Communication Interface
Phasor Measurement PCS-997S Fault Line Locator PCS-996S-G Phasor Data Concentrator PCS-996 Phasor Measurement Unit
Disturbance Fault Recording PCS-996RC Disturbance Fault Recorder PCS-996R Disturbance Fault Recorder PCS-986 Disturbance Fault Recorder PCS-9013 DFR Management System
Stability Control System PCS-992 Power Stability Control System PCS-993 Out-of-Step Controller PCS-994 Frequency & Voltage Controller PCS-994S Frequency and Voltage Controller
Power Grid Monitoring and Control PCS-9000 Energy Management System PCS-9000 Distribution Management System
Configuration Tool PCS-Torch MOT Tool PCS-Studio Configuration Tool PCS-Explorer IED Configuration & Debugging Tool PCS-SCD Configuration Tool PCS-COMM Configuration & Debugging Tool
Accessories MD1501 Series Auxiliary Relays MD1701 Series Test Blocks MD1701S Test Block
FACTS PCS-9580 Static Var Compensator PCS-9583 Static Synchronous Compensator PCS-9570 Series Compensation PCS-9590 DC De-Icer PCS-9578 Controllable Shunt Reactor PCS-8200 Unified Power Flow Controller PCS-9571 Fault Current Limiter PCS-9564A Dynamic Voltage Restorer PCS-9569 Shore Power System
HVDC PCS-8600 UHVDC Converter Valve System PCS-9550 LCC-HVDC Control and Protection System PCS-8100 VSC-HVDC IGBT Valve PCS-9520 VSC-HVDC Control and Protection System PCS-9510 Cooling System PCS-8300 High-voltage DC Circuit Breaker PCS-9250 DC Electronic CT/VT
PV & Wind Power Grid-Connection PCS-9561 Wind Energy Converter System PCS-9700 Renewable Energy SCADA PCS-9726 Generation Management Unit PCS-9700F Power Forecast System PCS-9700R AGC/AVC PCS-9563 PV Grid-Connected Inverter
Battery Energy Storage System PCS-8811CB Centralized energy storage system PCS-8812PB Liquid cooled energy storage cabinet PCS-8813CPB High voltage directly connected energy storage system PCS-9567A Power Conversion System PCS-9567C BESS Control Unit PCS-9700 Energy Storage System
Microgrid PCS-9617MG Microgrid Controller
Static Frequency Converter PCS-9575 Static Frequency Converter
Protection,Automation&Control DMS EMS Stability Control & WAMS Digital Substation
HVDC & FACTS De-Icing Unified Power Flow Controller (UPFC) Series Compensation Static Synchronous Compensator(STATCOM) Static Var Compensator (SVC) LCC-HVDC Transmission VSC-HVDC Transmission
Renewable & Microgrid Energy Storage System Microgrid PV Generation SFC
Power Generation Pumped Storage Power Plant Nuclear Power Plant Hydro Power Plant Thermal Power Plant
Transmission System AC Transmission LCC-HVDC Transmission VSC-HVDC Transmission
Distribution System Distribution Network
Industrial Consumer Urban Track Traffic Electrified Railway Oil & Petrochemical Metals & Mining
On December 26, 2022, the first PCS-8353 arc less fast DC circuit breaker independently developed by NR was successfully put into operation on Zhengzhou Metro Line 3. The DC circuit breaker is based on the design concept of fast breaking without arc. Compared with the air DC circuit breaker, the fault breaking time is shortened from tens of milliseconds to less than 2 milliseconds, and the number of near end-fault current breaking is increased to more than 200. After breaking, the equipment does not need maintenance, and the core performance parameters of the equipment are superior to those of the same level product.
On site of Zhengzhou Metro Line 3
At present, the air mechanical circuit breaker widely used in the DC traction power supply system of urban rail transit will have a large number of arcs during the breaking process. Each breaking will ablate the circuit breaker contact and arc extinguishing grid, resulting in low electrical life and high maintenance costs. In addition, due to the slow breaking speed, the actual cut-off current is close to the expected maximum short-circuit current of the system, which has a great impact on the system.
In order to solve the above problems, NR creatively proposed a hybrid DC circuit breaker topology based on high arc voltage vacuum commutation, relying on the successful application of ± 500kV high-voltage DC circuit breaker and ± 10kV DC distribution network circuit breaker, which can realize no visible arc during the breaking process and maintenance free after equipment breaking, while greatly improving the breaking life to meet different application conditions of urban rail transit DC power supply system.
The PCS-8353 arc less fast DC circuit breaker adopts an integrated handcart structure design, which is compact in size. The external primary and secondary interfaces can be compatible with the air type DC circuit breaker to meet the rapid replacement application of new construction and reconstruction projects.
NR has continuously cultivated the urban rail transit industry for more than ten years. More than ten kinds of products in three series of comprehensive control, smart power supply and green energy conservation have been successfully applied to nearly 200 subway lines in more than 40 cities in China, among which the market share of 35kV relay protection, SVG and master substation integrated automation system for rail transit is leading. As an important member of NR Rail Transit product solutions, PCS-8353 arc free fast DC circuit breaker will provide a more safe and reliable protection means for urban rail transit DC power supply system.