NB2LE-40ZT Smart Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

NB2LE-40ZT Smart Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

NB2LE-40ZT Smart Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

NB2LE-40ZT Smart Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

NB2LE-40ZT Smart Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

NB2LE-40ZT Smart Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

The CHINT NB2LE-40ZT Smart RCBO integrates overload, short-circuit, overvoltage, undervoltage, and leakage protection with intelligent monitoring and remote control capabilities. Designed for 230 V AC 50 Hz systems, it features RS485 or Bluetooth communication, enabling real-time data collection and remote operation through CHINT’s Smart Gateway (SMG-WL1SR). Its built-in metering and diagnostic functions ensure safe, efficient, and connected energy management in residential, commercial, and industrial power systems.

Product Information

Function: Overload, short-circuit, overvoltage, undervoltage, leakage, and remote control protection
Standard Compliance: IEC/EN 61009-1
Rated Voltage (Ue): AC 230 V
Rated Frequency: 50 Hz
Rated Current (In): 6 A, 10 A, 16 A, 20 A, 25 A, 32 A, 40 A
Poles: 1P+N
Tripping Curve: B, C curves
Rated Residual Operating Current (IΔn): 30 mA
Leakage Detection Types: Type AC and Type A
Rated Breaking Capacity (Icn): 10 kA
Rated Insulation Voltage (Ui): 500 V
Rated Impulse Withstand Voltage (Uimp): 6 kV
Dielectric Strength: 2 kV for 1 min
Mechanical Life: 10,000 operations
Electrical Life: 4,000 operations
Operating Temperature Range: –40 °C to +70 °C
Storage Temperature: –25 °C to +70 °C
Altitude: ≤ 1500 m
Communication Protocol: Modbus-RTU (RS485: A/B/GND terminals)
Measurement Accuracy:
- Voltage: ±1.0%
- Current: ±1.0%
- Power: ±2.0%
Over/Undervoltage Settings:
- Overvoltage action: 280 V ±5 V
- Overvoltage recovery: 250 V ±5 V
- Undervoltage action: 165 V ±5 V
- Undervoltage recovery: 190 V ±5 V
Recovery delay: ≥ 10 s
Mounting Type: TH35-7.5 Standard DIN rail
Terminal Type: Cable/pin busbar connection
Wire Capacity: 1–16 mm²
Tightening Torque: 2 N·m
Protection Degree: IP20
Pollution Degree: 2
Certifications: CE, RoHS, REACH
Dimensions (mm):
- Height: 82
- Width: 36
- Depth: 78 (max)

Name

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NB2LE-40ZT-RCBO-Catalog.pdf

1.52MB

2025-12-15

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Name

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2306-NB2LE-40ZT-RCBO-Manual EN.pdf

3.56MB

2024-11-13

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2405-NB2LE-40ZT-RCBO-REACH Declaration Certificate.pdf

387.87KB

2024-11-13

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2308-NB2LE-40ZT-RCBO-CE RoHS Declaration Certificate.pdf

293.93KB

2024-11-13

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2304-NB2LE-40ZT-RCBO-CB Certificate.pdf

586.49KB

2024-11-13

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NB2LE-40ZT-RCBO-Drawing-1P+N-3D.stp

7.51MB

2025-03-25

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FAQs

What is the NB2LE-40ZT used for?

It’s a smart RCBO that combines residual current protection and over-current protection with real-time monitoring and remote control for modern electrical systems.

How is the NB2LE-40ZT different from traditional RCBOs?

Unlike standard RCBOs, it supports RS485 and Bluetooth communication, fault self-diagnosis, and remote operation via CHINT’s SMG-WL1SR Smart Gateway.

What protection functions are built into this device?

It offers comprehensive protection — overload, short-circuit, over/undervoltage, leakage, and phase loss — ensuring maximum safety for connected circuits.

What kind of electrical data can it measure?

The breaker can measure voltage, current, and power with high accuracy (±1% for voltage/current, ±2% for power), enabling effective energy management.

Can it be remotely managed and monitored?

Yes. It communicates via RS485 (Modbus-RTU) and integrates seamlessly with smart energy management systems, allowing remote operation and fault alarm functions.