GB/T 10963.3-2016 in English
SUPERSEDEDCircuit-breakers for overcurrent protection for household and similar installation―Part 3:Circuit-breakers for d.c.operation
- Issued on:2016-04-25
- Implemented on:2016-11-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
《GB/T 10963.3-2016家用及类似场所用过电流保护断路器 第3部分：用于直流的断路器》由TC189（全国低压电器标准化技术委员会）归口，TC189SC2（全国低压电器标准化技术委员会低压直流设备与应用分会）执行，主管部门为中国电器工业协会。
Introduction
Analysis of the core content of the standard
| Technical parameters | AC circuit breaker | DC circuit breaker (this standard) |
|---|---|---|
| Rated voltage | 220V/380V | Single-pole 250V/two-pole 500V |
| Time constant | Not applicable | T≤4ms or T≤15ms |
| Trip type | Type B/C | Type B/C/x (customizable) |
Key technical requirements
1. Structural characteristics
DC circuit breaker must meet the following requirements:
- Inter-pole linkage mechanism to ensure synchronous breaking (8.1.2)
- Minimum electrical clearance 4.0mm (pollution level 2 environment)
- Clearly mark the time constant T15 mark (6.k clause)
2. Key test items
Application guidance
Selection Recommendations
| Application scenarios | Recommended types |
|---|---|
| Photovoltaic system (<250V) | Single-pole B-type circuit breaker |
| Data center (440V) | Two-pole C-type circuit breaker (T15) |
Installation Precautions
Polarity identification (6.m clause) requirements:
Polarized circuit breakers must be marked with "+"/"-" terminals to prevent reverse connection and cause protection failure
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