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Home  /  Terminals & Bars  / 

CHINT NU6-I+II Low-Voltage Surge Protective Device (SPD)

CHINT NU6-I+II Low-Voltage Surge Protective Device (SPD)

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Category: Terminals & Bars
Brand: CHINT
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Description
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CHINT NU6-I+II Low-Voltage Surge Protective Device (SPD),
offers combined Type I and Type II protection, ensuring reliable surge and lightning defense for AC 230/400 V power systems.
furthermore it is Built to IEC/EN 61643-11 standards, it provides superior transient overvoltage suppression with a discharge capacity up to 50 kA.
moreover it is  Designe for durability and ease of maintenance, the NU6-I+II features plug-in modules,
in addition aging and overheating protection, visual fault indication,
and finally optional remote alarm signaling—making it ideal for industrial and commercial distribution systems.

  • first Standard: IEC/EN 61643-11
  • second Certifications: CE, CB, RoHS, VDE
  • next SPD Type: Type I + Type II (Class I + II test)
  • then Application: Low-voltage power distribution and control systems (AC 50/60 Hz)
  • afterward Rated Operating Voltage (Ue): Single-phase 230 V / Three-phase 400 V
  • as a result Maximum Continuous Operating Voltage (Uc): 275 V / 385 V / 255 V
  • therefore Impulse Current (10/350 μs, Iimp): 12.5 kA (L–PE), 25/50 kA (N–PE)
  • but Maximum Discharge Current (8/20 μs, Imax): 50 kA (L–PE), 40/50 kA (N–PE)
  • and Nominal Discharge Current (8/20 μs, In): 25 kA (L–PE), 30/50 kA (N–PE)
  • also Voltage Protection Level (Up): ≤ 1.5 / 1.8 kV
  • Leakage Current (Ile @ 0.75U): < 50 μA/pole
  • Protection Modes: L–PE, N–PE, L–N
  • Remote Alarm Function: Optional (F-type with auxiliary contact)
  • Remote Contact Switching Capacity:
    • AC 250 V / 1 A
    • DC 250 V / 0.1 A, 125 V / 0.2 A, 75 V / 0.5 A
  • Cross-Section of Remote Signal Wire: ≤ 1.5 mm²
  • Wiring Range: 2.5–25 mm²
  • Recommended Wiring: Input ≥ 6 mm², Ground ≥ 10 mm²
  • Tightening Torque: 2.0 N·m
  • Mounting: TH35-7.5 DIN rail
  • Ambient Temperature Range: −5 °C to +40 °C
  • Pluggable Modules: Yes (replaceable cartridge design)
  • Dimensions:
    • 1P: 18 mm
    • 1P+N / 2P: 36 mm
    • 3P: 54 mm
    • 3P+N / 4P: 72 mm
  • meanwhile Recommended External Disconnector: Fuse 125 A gL/gG or NXSCB-I+II 12.5H
  • soon Protection Features: Aging and overheating protection, visual fault indicator
  • finally Installation Use Case: Lightning protection for main incoming panels and industrial cabinets

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