CHINT NB310L(3PN) Residual Current Operated Circuit Breaker

CHINT NB310L(3PN) Residual Current Operated Circuit Breaker,

with over-current protection (Magnetic) combines residual current protection and magnetic over-current protection in a single compact unit,
ensuring personnel and equipment safety against earth leakage,
overloads, and short circuits. first it Designe for both residential and industrial applications,
in the same way it provides high breaking capacity (6–10 kA) and supports both A and AC tripping classes for comprehensive circuit protection.
The NB310L series offers multiple tripping curves (B, C, BK, CK) and 2P or 3P+N configurations,
making it highly adaptable for various low-voltage distribution environments.

• Function: Combined protection against earth leakage, overload, and short-circuit faults
• Standards Compliance: IEC/EN 61009-1
• Rated Voltage (Ue):
  • 2P models: 110/230/240 V AC
  • 3P+N models: 230/400 V AC
• Rated Current (In): 6 A, 10 A, 13 A, 16 A, 20 A, 25 A, 32 A, 40 A
• Rated Frequency: 50/60 Hz
• Tripping Class: Type A (AC and pulsating DC) and Type AC (sinusoidal AC only)
• Tripping Curves:
  • B Curve: For resistive loads and long cable runs
  • C Curve: For mixed resistive and inductive loads
  • BK Curve: For enhanced low-level tripping in long cable TN/IT systems
  • CK Curve: For inductive loads with low inrush current
• Rated Residual Operating Current (IΔn): 30 mA, 300 mA
• Rated Short-circuit Capacity (Icn): 6,000 A or 10,000 A (depending on model)
• Rated Residual Making and Breaking Capacity (IΔm): 3,000 A
• Insulation Voltage (Ui): 500 V
• Rated Impulse Withstand Voltage (Uimp): 4,000 V (1.2/50 μs)
• Dielectric Strength: 2 kV for 1 min
• Break Time Under IΔn: ≤ 0.1 s
• Pollution Degree: 2
• Electrical Life: 2,000 operations
• Mechanical Life: 10,000–20,000 operations
• Contact Position Indicator: Yes
• Ambient Operating Temperature: –25 °C to +40 °C (daily average ≤ 35 °C)
• Storage Temperature: –25 °C to +70 °C
• Temperature Derating Reference:
  • Reference temperature: 30 °C
  • Derating coefficient: 0.95 (40 °C), 0.80 (70 °C)
• Protection Degree: IP20
• Mounting Method: DIN rail (EN 60715, 35 mm), fast clip-on installation
• Connection Type: Top or bottom wiring (cable, U-type, or pin-type busbar)
• Terminal Capacity:
  • Cable: up to 25 mm² (AWG 18–3)
  • Busbar: up to 10 mm² (AWG 18–8)
• Tightening Torque: 2 N·m (≈18 in·lbs)
• Available Configurations: 2P or 3P+N
• Add-on Devices (optional):
  • XF9 auxiliary contacts
  • S9 shunt release
  • V9 undervoltage release
  • OVT-1 overvoltage release
• Certifications: CE, CB, KEMA, RoHS, REACH
• Dimensions (mm):
  • 2P: 86 (H) × 36 (W) × 77.1 (D)
  • 3P+N: 86 (H) × 72 (W) × 77.5 (D)