Dry-type transformers incorporate multiple protection measures to ensure safe and stable operation. This section details the relay protection systems used for these transformers.Responding to Dry-Type Transformer Protection Actions When relay protection activates and trips the circuit breaker, follow these procedures:

 Post-Trip Inspection:
Immediately investigate the cause of the trip. Do not reset alarms or signals until the fault is identified, resolved, and power is safely restored.Quick-Break Protection: If instantaneous (quick-break) protection operated, listen for abnormal sounds from the transformer as a preliminary check.

 Gas Protection (Buchholz Relay):
If gas protection activated, first determine if the relay itself triggered.If not triggered, the fault likely lies outside the transformer.
Focus inspection on:
The supply cable and busbar connected to the transformer.Potential phase-to-phase short circuits on the line side.

 Fault Location:
If the gas protection relay was triggered, the fault is likely internal to the transformer.Key Requirements for Relay Protection Systems

 Component Quality:
Select high-quality relays and protection components. Minimize the number of contact points in the circuit.

 Installation:
Use qualified, reliable protection and control panels. Mount them securely on vibration-free surfaces.

 Wiring:
Employ qualified terminals and ensure all connections are properly made.