As part of LDC operations, it is essential to follow best practices for the storage of electricity transformers. Proper storage prevents environmental incidents, property damage due to theft or vandalism, and contamination. It also ensures that equipment remains in optimal condition and ready for use when needed.
Based on recent claims, we recommend special attention be paid to transformers and equipment in storage. Extra physical security, monitoring, and proper containment are crucial to prevent vandalism and the potential for environmental contamination. The following are best practices and recommendations for storing electricity transformers:
Protection, Security and Containment
- Extra Security: Store transformers in a fenced, monitored location to prevent theft and vandalism.
- Proper Containment: Ensure proper containment underneath transformers to prevent environmental contamination – even in storage.
- Insurance Coverage: Schedule the asset and location on your property insurance policy to maintain coverage while the transformers are not in use.
Location and Environment
- Proximity: Store transformers near their installation site for easy access and rapid deployment.
- Indoor Storage: Whenever possible, store transformers indoors to protect them from adverse weather conditions such as rain, snow, and direct sunlight. If indoor storage is not feasible, use weatherproof covers and ensure proper ventilation to prevent moisture buildup.
- Temperature Control: Choose a location with stable temperatures to avoid condensation and damage to insulating materials. If outdoor storage is necessary, use thermal blankets or enclosures to maintain a consistent temperature.
- Stable Foundation: Keep the transformer in its upright position on a stable foundation, such as a concrete pad.
Maintenance and Monitoring
- Regular Monitoring: Regularly monitor the location to ensure no oil spills, theft, vandalism, or similar incidents have occurred.
- Nitrogen Blanket: For liquid-filled transformers, maintain a nitrogen blanket at 2-3 psi to prevent moisture ingress. Regularly check the pressure gauge and ensure it holds positive pressure.
- Dust Protection: Protect the transformer from dust accumulation by covering vents or using appropriate filters.
- Routine Inspections: Conduct quarterly inspections to monitor nitrogen levels, check for leaks, and ensure the transformer remains in good condition.
- Maintenance Testing: Perform acceptance and maintenance testing at the end of the storage period to ensure the transformer is ready for use. Before putting the transformer back into use, conduct proper maintenance checks and testing to ensure it is fully and safely functional.
Documentation and Compliance
- Storage Plan: Develop and maintain a detailed storage plan that includes the location, maintenance schedule, and inspection records for each transformer.
- Compliance: Ensure all storage practices comply with relevant industry standards and regulations.
Adhering to these best practices can help to avoid costly incidents and insurance claims, in addition to ensuring the longevity and reliability of equipment.
