Transformer condition monitoring system selection guide: core functions and technical indicators
Date: June 1, 2026 14:12:02
- Define the dimensions before choosing the product: Define which condition parameters need to be monitored (oil chromatography/temperature/local discharge/core/vibration), and then select the corresponding sensors and system configurations according to the dimensional requirements. Not all transformers need full dimensional coverage.
- Platform compatibility is key: When selecting a system, pay attention to whether the system supports standard protocols such as Modbus and IEC61850, and whether it can be seamlessly connected with the existing monitoring and control backend in the station. Closed protocol system will form a data island
- Diagnostic capability is more important than acquisition capability: Collecting data is only the first step, the core value is whether the system can give accurate troubleshooting and recommendations based on the data.
1. Selection of core indicators
| norm | fundamental requirement | Preferred Criteria |
|---|---|---|
| Monitoring dimensions | ≥2 dimensions (oil color spectrum + temperature) | 4+ Dimensions Scalable |
| communication protocols | Modbus RTU/TCP | Modbus+IEC61850 |
| diagnostic function | Trend graph + overrun alarm | Multi-dimensional integration + expert diagnosis |
| data storage | ≥1 year | ≥3 years + remote backup |
2. Selection process
2.1 List the transformers and the voltage class, capacity, and importance rating of each to determine the level of monitoring configuration for each unit.
2.2 Determine monitoring dimensions based on configuration level and prepare technical specifications. Full dimensional coverage for critical mains transformers and selection of basic dimensions for general distribution transformers.
2.3 Solicit proposals and quotations from suppliers, and comprehensively evaluate them in three dimensions: technical parameters, engineering cases, and after-sales guarantee.
2.4 Clarify when signing the contract: whether the equipment warranty period, service rates after the warranty has expired, software upgrade policy, training and remote diagnostics are included.
3. Frequently Asked Questions FAQ
3.1 Q. Is there a big difference between domestic and imported systems?
A: In terms of core monitoring functions and data collection accuracy, domestic mainstream brands have been able to meet the needs of substations at all levels. Domestic solutions tend to be more advantageous in terms of after-sales response speed, spare parts supply and customized services.
3.2 Q. How are the technical and commercial points allocated in the selection process?
A: It is recommended that the technical score be weighted no less than the commercial score. The technical score should cover such dimensions as monitoring performance, number of cases, after-sales system and software functions, and the commercial score should incorporate long-term operation and maintenance costs in addition to the equipment offer.
3.3 Q. Is it necessary to cover all dimensions at once?
A: Not necessarily. It can be built in phases: the first phase on the two basic dimensions of oil chromatography and temperature, and then expand the dimensions of local amplifier and iron core after stable operation. The key lies in choosing a platformized and scalable system architecture.
Disclaimer: The content of this article is for technical exchanges and reference only, and does not constitute any form of procurement commitment or contract offer. Product technical parameters, configuration programs and prices are subject to the actual signed contracts and technical agreements.
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