The oil flow relay protects the on-load tap changer (OLTC) and, therefore, the transformer itself. If oil flow occurs from the OLTC head to the oil conservator, the flow vane switches the reed, the circuit breakers are tripped and the transformer is de-energized.
The ABB oil flow relay promptly detects leakages from the energized tap-changer’s oil compartment to the oil conservator and protects the OLTC from damage.
- More than 50 years of experience in manufacturing transformer components
- Global after-sales and customer support network
- Liquid-filled power transformers with on-load tap-changer