EMR Tap Changers Private Limited

• Transformers are critical and high-value components in power systems.

• Failures in transformers or their accessories can cause major power outages.

• Repairing such failures is time-consuming and costly.

• Protective relays help ensure the reliable and uninterrupted operation of the power system.

• The Oil Surge Relay (OSR) is one such protective device used to prevent damage.

Protect Transformer & OLTC from Damage

• The OSR works on the principle of oil turbulence detection.

• It is installed in the pipeline between the conservator and the on-load tap changer (OLTC).

• Under normal conditions, the oil flow through the OSR is stable and within safe limits.

• In case of a fault in the OLTC, pressure builds up and creates oil turbulence.

• If the oil flow exceeds the set threshold, the OSR trips the transformer, preventing damage.

• This action safeguards both the transformer and OLTC from faults.

• The OSR is designed and tested to operate reliably under extreme environmental and high seismic conditions.