Chint NB1L RCBO

Name: Chint NB1L RCBO
Brand: CHINT
SKU: 1600083734558

Chint NB1L RCBO

Rated Frequency:50/60hz
BCD Curve:C
Brand Name:Chint
Place of Origin:China
Model Number:NB1L
Poles Number:2
Breaking Capacity:6kA,10kA

Poles

Rated Current

Tripping Curve

Residual Current

Rated Voltage

SKU: 1600083734558 Category: Chint RCCB RCBO

Description

Chint original NB1L RCBO 1P+N B16 C10 C16 C20 C25 C40 C63 CHNT Residual Current Circuit Breaker with Over current Protection

Chint NB1L Residual Current Operated Circuit Breaker with over-current protection (Magnetic)

1. General

1.1 Function
Personnel and fire protection: Cable and line protection against overload and short-circuits.

1.2 Selection
  Rated residual operating current
  IΔn ≤30 mA: additional protection in the case of direct contact.
  IΔn ≤300 mA: preventative fire protection in the case of ground fault currents.

  Tripping class
  AC class
  Tripping is ensured for sinusoidal,
  alternating currents, whether they be quickly applied or slowly increase.
  A class
  Tripping is ensured for sinusoidal, alternating residual currents as well as for pulsed DC residual currents, whether they be   quickly applied or slowly increase.

  Tripping curve
  B curve (3-5 In) protection and control of the circuits against overloads and short-circuits; protection for people and big length     cables in TN and IT systems.
  C curve (5-10 In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive   loads with low inrush current.

Additional information

Weight	2 kg
Dimensions	25 × 25 × 25 cm
Rated Current	3A, 63A, 25A, 4A, 5A, 20A, 50A, 1A, 2A, 10A, 16A, 32A, 6A, 40A
Rated Voltage	240V/415V
Poles	1P+N
Residual Current	30mA, 100mA, 300mA
Tripping Curve	B, C, D

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Chint NB1L RCBO.

📥

Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.

📐

2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.

Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.