Boards/Switchyards Circuit Arrangements TRIZ Cases
- Backup Trip Relay Circuit for Switchgear Fault Isolation
A separate backup trip circuit detects relay failure or power loss and switches coil control to keep DER isolation compliant with IEEE 1547.
- Box-Type Substation Mechanical Interlock for Faster Transformer Maintenance
A keychain-based mechanical interlock simplifies breaker and disconnector shutdown steps, improving transformer maintenance speed and safety.