A failed relay is an unsupervised transformer. Protection and monitoring devices are replaced like-for-like or by qualified equivalence — without idling the unit longer than necessary.
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Protection for hermetically sealed transformers: gas, pressure and temperature detection, two thresholds, alarm and trip contacts.
For breathing units with a conservator: double float, alarm and trip contacts.
Ø 100 mm dial, bulb and capillary, drag pointer, 2 or 4 changeover contacts.
Float type, remote dial, low / high level contacts.
PT100 or PTC sensors embedded in the windings, multichannel monitoring relays.
Rapid-discharge relief valve, with or without signalling contact.
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