GB/T 17468-2019 in English
VALIDGuide for choice power transformers
- Issued on:2019-12-10
- Implemented on:2020-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
$690.00
$670.00
$670.00
《GB/T 17468-2019电力变压器选用导则》由TC44（全国变压器标准化技术委员会）归口，主管部门为中国电器工业协会。
Introduction
Analysis of the core content of the standard
| Comparison dimensions | 2008 version | Main changes in the 2019 version |
|---|---|---|
| Technical scope | Basic selection principles | Added 11 technical chapters such as short-circuit capacity and non-electrical protection |
| Environmental adaptability | General conditions | Detailed requirements for protection against extreme cold/tropical climates (TH/TA/T types) |
| Energy efficiency indicators | Reference requirements | Clearly define the load rate of 50% as the energy efficiency demarcation point |
Key technical requirements
Transformer type selection matrix
| Application scenarios | Recommended types | Key indicators |
|---|---|---|
| Indoor substation | Dry-type transformer | Flammability level F1, environmental level E2 |
| Extremely cold areas | Oil-immersed transformer | Oil solidification point ≤-40℃, steel impact toughness ≥3kg/cm² |
Implementation points
Golden rule for parallel operation
- Voltage ratio deviation needs to be controlled within ±0.5%
- Short-circuit impedance difference should be ≤10%
- Capacity ratio is recommended to be in the range of 1:1~1:3
- The limit tap impedance matching must be verified
Special environment response strategies
- Hot and humid areas: Use TH type protection and strengthen the anti-pollution design of insulators
- High altitude: The temperature rise limit is reduced by 0.4K for every 100m increase
- Seismic zone: The mechanical strength of the oil tank needs to be increased by 30%
Technology evolution analysis
Key points of the 2019 version of the standard:
- Added LCC life cycle cost assessment method (Appendix F)
- Clear intelligent control requirements (cooler operation life balance strategy)
- Refine the classification standards for condition-based maintenance (mandatory overhaul every 20 years)
GB/T 17468-2019 Guide for choice power transformers English
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