GB/T 34581-2017 in English
VALIDGeneral technical requirements for photovoltaic system DC circuit breakers
- Issued on:2017-09-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$418.00
《GB/T 34581-2017光伏系统用直流断路器通用技术要求》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
Core characteristics of PV DC circuit breakers
| Key parameters | Technical requirements | Test methods |
|---|---|---|
| Rated voltage | ≤1500V DC | 9.3.2.2.1 |
| Time constant | 1ms (expandable) | 9.3.2.2.3 |
| Impact withstand | 8000V(1500V system) | Table 1 |
Structural innovation and test requirements
The standard innovatively introduces software difference permission for electronic tripping devices (Clause 8.1), which requires passing:
- 50 times -40℃~85℃ thermal cycle test (9.3.10)
- Critical DC load current test (9.3.9)
- Electromagnetic compatibility 3V/m radiation immunity (Appendix C)
Comparison of typical application scenarios
Thin-film photovoltaic systems need to pay special attention to functional negative grounding protection, while crystalline silicon systems focus on circuit breaker selection under ungrounded configuration (see standard notes a/b)
Implementation recommendations
| Links | Key points | Standard basis |
|---|---|---|
| Selection | Preferably select ICB type with instantaneous tripping function | Appendix G |
| Installation | Maintain 75cm cable spacing (50cm on the power side + 25cm on the load side) | 9.3.2.6.4.2 |
| Maintenance | Regularly check the integrity of the polyethylene film protective layer | Requirements in Figure 1 |
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 22200.3-2025 in English
Reliability for low-voltage apparatus—Part 3: Reliability test method of overload relay
2025-12-31 -
GB/T 22200.1-2025 in English
Reliability for low-voltage apparatus—Part 1: General rules
2025-12-31 -
GB/T 32902-2016 in English
Residual current operated circuit-breaker (CBAR) with automatic reclosing function
2016-08-29 -
GB/T 22692-2008 in English
Switches for electric tools
2008-12-31
