Tin tức 1 EN
Năm 2017, doanh số bán xe máy quay đầu giảm. Tuy nhiên, dù giá xe ngày càng đắt nhưng nhiều người chuyển hướng, bỏ xe cũ...
NA90
Mã sản phẩm: NA90
Thương hiệu: THYTRONIC
Trịnh Thị Thu Hà
0364487152
Nguyễn Minh Châu
0989913569
Nguyễn Hoàng Mi
0976061096
Nguyễn Cẩm Lan
0968781926
The relay type NA90 can be typically used in radial or meshed MV and LV networks as feeder or power transformer protection:
• On radial, ring and parallel feeders of any length in solidly grounded, ungrounded, Petersen coil and/or resistance grounded systems.
• On parallel connected generators and transformer on the same busbar.
• For ground fault protection on both sides of power MV-LV transformers.
Moreover undervoltage and overvoltage functions are provided.
Applications
• Feeder
• Generator
• Motor
• Transformer
Protection functions
• Pt100 thermometric probes (26)
• Undervoltage (27)
• Thermal image (49)
• Phase overcurrent (50/51)
• Measured residual overcurrent (50N(1)/51N(1))
• Measured residual overcurrent (50N(2)/51N(2))
• Calculated residual overcurrent (50N(Calc)/51N(Calc))
• Overvoltage (59)
• Residual overvoltage (59N)
• Phase directional overcurrent (67)
• Ground directional overcurrent (67N)
• High impedance restricted earth fault (87NHIZ)
• Breaker failure (BF)
Monitoring and control functions
• CB diagnostic
• Cold Load Pickup (CLP)
• CTs monitoring (74CT)
• Digital Fault recording (DFR)
• Fault and event logging (SER & SFR)
• Logic selectivity
• Multiple setting profiles
• Programmable Logic Controller
• Second harmonic restraint
• Self-test
• Trip circuit supervision (74TCS)
• VTs monitoring (74VT)
Hardware
• 2 binary inputs + 6 output relays + 8 LEDs
• Auxiliary power supply 110-230 Vac/dc
• Auxiliary power supply 24-48 Vac/dc
• Flush, projecting, projecting, rack, with separate MMI
• Network module with Ethernet FX port (optical fiber)
• Network module with Ethernet TX port (copper RJ45) + RS485 port
• Nominal current 1/5 A selectable by DIP-switch
• RS485 port (unavailable with Ethernet FX port)
• Standard CT amperometric inputs 1/5 A
Communication
• Modbus RTU RS232 protocol
• Modbus RTU RS485 / IEC 870-5-103 / DNP3 protocol
• Modbus TCP/IP protocol (network board must be provided)