Woodward HighPROtec MCDLV4, Руководство пользователя

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Protective Elements
Sudden Pressure Protection Module – Sudden Pressure Protection
Available elements:
Ext Sudd Press
Principle – General Use
Most large size transformers (5000 KVA or above) are recommended to be equipped with a sudden pressure relay
(Buchholz) that detects rapid change in oil or gas pressure within the tank as result of internal arcing. The sudden
pressure relay can detect internal faults such as turn to turn faults that other protection functions such as differential
and overcurrents may not be sensitive enough to sense. The sudden pressure relay is usually equipped with output
contacts that can be directly used for tripping and alarming, but it does not have recording and communication
capabilities built in.
A sudden pressure protection module is provided in the protective device to take the output signals from the
conventional sudden pressure relay and to form more secure and intelligent transformer protections. Through this
module, the events of sudden pressure relay operations can be recorded and communicated to the control center
(SCADA).
1033 MCDLV4 DOK-HB-MCDLV4-2E