Product Specifications
Technical Parameters
| Parameter | Value |
|---|---|
| Product Model | NB1G-63 |
| Product Type | Miniature Circuit Breaker |
| Rated Frequency | 50 Hz |
| Rated Operational Voltage Ue | AC 230 V |
| Rated Current In | 10 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A |
| Rated Insulation Voltage Ui | 500 V |
| Rated Impulse Withstand Voltage Uimp | 4 kV |
| Number of Poles | 1P+N |
| Instantaneous Tripping Characteristic | C curve |
| Rated Short-Circuit Breaking Capacity Icn | 10 kA |
| Mechanical Endurance | 20,000 operations |
| Electrical Endurance | 4,000 operations |
| Tightening Torque | 2.0 N·m |
| Pollution Degree | Degree 2 |
| Degree of Protection | IP20 |
| Installation Category | Category II, III |
| Applicable Standards | GB/T 10963.1, IEC 60898-1 |
| Certifications | CCC, KC |
Functions and Features
- Provides overload protection
- Provides short-circuit protection
- Provides overvoltage protection
- 1P+N configuration
- Rated operating voltage of AC 230 V
- Rated current range from 10 A to 63 A
- C-curve instantaneous tripping characteristic
- Rated short-circuit breaking capacity of 10 kA
- Suitable for infrequent switching under normal operating conditions
- Mechanical endurance of 20,000 operations
- Suitable for installation in standard low-voltage distribution boards
Environmental and Installation Conditions
| Item | Requirement |
|---|---|
| Pollution Degree | Degree 2 |
| Degree of Protection | IP20 |
| Installation Category | Category II, III |
| Wiring Configuration | 1P+N |
| Tightening Torque | 2.0 N·m |
| Installation Requirement | Install inside a low-voltage distribution board or cabinet that meets the specified operating conditions |
| Wiring Requirement | Connect the phase and neutral conductors according to the terminal markings and ensure reliable tightening |
Installation and Operating Instructions
- Confirm that the circuit voltage does not exceed AC 230 V before installation
- Select the rated current according to the actual circuit load
- Connect the phase and neutral conductors according to the product terminal markings
- Tighten conductors securely to prevent loose connections and excessive contact resistance
- Recommended terminal tightening torque: 2.0 N·m
- The product is intended primarily for circuit protection and should not be used as a frequently operated control switch
- Installation and maintenance should be performed by qualified electrical personnel
Applications
- Residential terminal distribution boards
- Commercial building low-voltage distribution systems
- Office and public building distribution systems
- Industrial low-voltage terminal distribution
- Lighting circuit protection
- Socket outlet and general-purpose circuit protection
- AC 230 V circuits requiring overvoltage protection
尺寸图
Product Overview
The NB1G-63 Miniature Circuit Breaker is designed for AC 50 Hz low-voltage circuits with a rated operating voltage of 230 V and rated currents up to 63 A. It protects electrical circuits and connected equipment against overload, short-circuit, and overvoltage faults. The product adopts a 1P+N configuration, allowing simultaneous connection of the phase conductor and neutral conductor. It features a C-curve instantaneous tripping characteristic and is suitable for general distribution circuits and electrical loads with moderate inrush currents. With a rated short-circuit breaking capacity of 10 kA, the NB1G-63 is suitable for low-voltage terminal distribution systems where relatively high prospective short-circuit currents may occur. Under normal operating conditions, the circuit breaker may also be used for infrequent switching of circuits. It is suitable for installation in residential, commercial, public, and industrial low-voltage distribution boards. The product complies with GB/T 10963.1 and IEC 60898-1 and has obtained CCC and KC certifications.
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