Trending method in switchgear control and auxiliary circuits visual check
The trending method involves verifying whether a signal lies within the normal range, exhibits consistent behavior in relation to other information, and does not show signs of drifting or abnormal fluctuations. Here are some examples:
1. Operating environmental conditions
Monitoring temperature and humidity levels. Deviations from the normal range can impact the performance of electrical and mechanical components.
2. Circuit breaker mechanical operation counter
Automation data is used to monitor the number of circuit breaker operations. The mechanical counter can malfunction in several ways. It might double - count operations, become stuck at a frozen count, or be accidentally manually reset or replaced. By comparing the mechanical counter value with the automated data, such anomalies can be detected.
3. Count of recharging system
Tracking the number of operations of the recharging system serves multiple purposes. It enables verification of consistency with the physical counter. Additionally, by discerning anomalies in the maximum run time or the number of starts per day, it becomes a means to detect problems within the recharging system. For instance, if the recharging system starts far more frequently than normal or has an unusually long run time, it could indicate an underlying issue.
4. Status of auxiliary switches
This involves the verification of the timing of switch operations and ensuring their correct behavior. Incorrect timing or improper functioning of auxiliary switches can lead to miscommunication within the electrical system and potentially cause malfunctions in associated equipment.
5. Other auxiliary services
Power sources such as DC, AC, mechanical, electromagnetic, and thermal power supplies need to be monitored. Additionally, high - pressure supplies like hydraulic and pneumatic systems are also part of the monitoring scope. Any irregularities in these power and supply systems can affect the overall operation of the equipment.
6. Manufacturer - specified parameters
According to the manufacturer's documentation, other parameters may be included in the trending analysis. Sometimes, trending secondary parameters can be useful in uncovering early symptoms of a problem, even if they are not directly related to the main operational functions.
The photo depicts a medium - voltage circuit breaker control circuit.
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