Buchholz Relays | Single Element & Tap-Changer Type Relays
Transformer Protection Up to 10,000/50,000 litres 10,001 kVA/99 MVA
Pbwel Single Element type Buchholz Relays are available for 1” bore size, designated 1SE, which operate indiscriminately for gas or oil collection and are suitable for small oil filled transformer, capacitor and potential transformer protection.
A special range of single element relays are also available for Tap-changer type transformers which operate for a surge condition or loss of oil only and allow gas, normally produced during tap changing operations to pass freely.
The SE relay has only one operating element and operates in the same manner as the DE relays. A special open frame unit designated R575/1 suitable for fitting inside the header tank tapchangers which operate due to gas collection, oil loss and surge conditions is available. A protective diode unit type D1 can also be provided to protect Reed switches employed in single element units.
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