CHINT NB3L-40 Residual Current Operated Circuit Breaker

CHINT NB3L-40 Residual Current Operated Circuit Breaker,

with over-current protection (Magnetic) combines residual current protection and over-current protection in one compact unit,
offering reliable performance in low-voltage electrical systems.
Designe for 400/415 V AC networks, it provides 10 kA breaking capacity, precision tripping through magnetic release technology,
and flexible configurations for different load types (B, C, and D curves).
The NB3L-40 is ideal for industrial and commercial installations requiring dependable safety and performance.

• Function: Combined overload, short-circuit, and residual current protection
• Standards Compliance: IEC/EN 61009-1
• Rated Voltage (Ue): 400/415 V AC
• Rated Current (In): 6 A, 10 A, 13 A, 16 A, 20 A, 25 A, 32 A, 40 A
• Poles: 3P+N
• Rated Frequency: 50/60 Hz
• Tripping Curves:
  • B Curve: For resistive circuits and long cables
  • C Curve: For mixed resistive/inductive loads
  • D Curve: For high-inductive loads with high inrush current
• Rated Residual Operating Current (IΔn): 30 mA, 100 mA, 300 mA
• Leakage Type: Type A and AC (pulsed DC and AC sensitivity)
• Rated Short-circuit Capacity (Icn): 10 kA
• Rated Residual Making/Breaking Capacity (IΔm): 6,000 A
• Insulation Voltage (Ui): 500 V
• Rated Impulse Withstand Voltage (Uimp): 4 kV
• Dielectric Test Voltage: 2 kV for 1 minute
• Mechanical Life: 10,000 operations
• Electrical Life: 4,000 operations
• Break Time Under IΔn: ≤ 0.1 s
• Ambient Operating Temperature: –5 °C to +40 °C (average ≤ 35 °C)
• Storage Temperature: –25 °C to +70 °C
• Temperature Derating Reference: 30 °C; coefficient reduces to 0.80 at 70 °C
• Pollution Degree: 2
• Protection Degree: IP20
• Mounting Type: DIN rail EN 60715 (35 mm)
• Connection Type: Cable, U-type busbar, or pin-type busbar (top/bottom)
• Terminal Capacity:
  • Cable: up to 25 mm² (AWG 18–3)
  • Busbar: 10 mm² (AWG 18–8)
• Tightening Torque: 2 N·m (≈ 18 in·lbs)
• Certifications: CE, CB, KEMA, RoHS