the oil surge relay is connected in between oltc chamber and oltc conservator.its is used for protection for oltc. Oil surge relay responds only by rate of rise pressure resulting from internal arcing. When rate of rise pressure oil cross certain value then alarm and trip contacts operate. A separation should be arranged such that the oil in OLTC chamber and transformer chamber should not be mixed together as shown in below fig. A sudden pressure surge in the oil compresses the bellows and forces the air within to move a diaphragm. The moving diaphragm actuates a switch that initiates tripping of the transformer. Oil temperature indicator OTI and Winding temperature indicator WTI Working principle Buchholz relay relies on the fact that an electrical fault inside the transformer tank is accompanied by the generation of gas and if the fault is high enough it will be accompanied by a surge of oil from the tank to the conservator The relay for OLTC application is positioned in the pipe work between the on-load tap-changer head and the oil conservator. This relay responds only if oil flow occurs from the on-load tap-changer head to the oil conservator. If this happens, the flow vane (2/D) which has 2 magnets (2/E) switches the reed (2/F). The surge of oil caused by a heavy internal fault bursts the disk and allows the oil to discharge rapidly. Relieving and limiting the pressure rise prevent explosive rupture of the tank and consequent fire. Also, if used, the separate tap changer oil enclosure can be fitted with a pressure relief device.

The relay for OLTC application is positioned in the pipe work between the on-load tap-changer head and the oil conservator. This relay responds only if oil flow occurs from the on-load tap-changer head to the oil conservator. If this happens, the flow vane (2/D) which has 2 magnets (2/E) switches the reed (2/F).

the oil surge relay is connected in between oltc chamber and oltc conservator.its is used for protection for oltc. Oil surge relay responds only by rate of rise pressure resulting from internal arcing. When rate of rise pressure oil cross certain value then alarm and trip contacts operate. A separation should be arranged such that the oil in OLTC chamber and transformer chamber should not be mixed together as shown in below fig.

How it protect the OLTC?.. THE OIL SURGE RELAY IS CONNECTED IN BETWEEN OLTC CHAMBER AND CONSERVATOR (SEPARATE FOR FOR OLTC) WITH BREATHER. A SEPAATION SHOULD BE ARRANGE SUCH THAT THE OIL IN OLTC CHAMBER AND TRANSFORMER CHAMBER SHOULD NOT BE MIXED TOGETHER.

Buchholz Relay : A protection device for Transformers by monitoring the 3150 12kv 250a EN 50386 - 630A EN 50386 - 250A Oil Surge Relay MONOBLOCK  The trip element will be operated by an oil surge in the event of more serious faults A machined surface is provided on the relay body for the purpose of testing  Because of Oil Surge, the oil pump sucks the air from sump instead of lubricant oil. This can cause lots of problems to the engine moving parts to wear and tear. Oct 7, 2016 tripping of oil surge relay & PRV. Rate of rise of gas pressure might be very high ( before operation of PRV), which might have resulted in cracks 

Oil Surge Relay is fitted. This relay operates on the principle of oil surge impinging on a flap causing operation of the mercury switch connected to the trip circuit.

May 24, 2019 Oil Surge Relay is one of the auxiliary equipment of oil immersed type transformer. It is mainly used to limit the damage to the on load tap changer in case of 

Working principle Buchholz relay relies on the fact that an electrical fault inside the transformer tank is accompanied by the generation of gas and if the fault is high enough it will be accompanied by a surge of oil from the tank to the conservator

and an oil conservator and is commonly referred to as the Buchholz relay. This circuit prevents operation of the HAA due to a DC surge arcing the 63 normally. Apr 20, 2015 Buchholz (Gas) Relay; Pressure Relay; Oil Level Monitor Device; Winding Thermometer It works independent of the number of transformer windings, tap The surge of oil caused by a heavy internal fault bursts the disk and  buchholz relay cannot be fitted on the load tap changer compartment; a special pro- tective relay is designed for this purpose with an oil-surge sensitive damper   Oil Surge Relay is fitted. This relay operates on the principle of oil surge impinging on a flap causing operation of the mercury switch connected to the trip circuit. Buchholz relay is a gas-actuated relay which is used for protection of oil filled This surge displaces the lower float operation the mercury switch associated with   Buchholz Relay : A protection device for Transformers by monitoring the 3150 12kv 250a EN 50386 - 630A EN 50386 - 250A Oil Surge Relay MONOBLOCK  The trip element will be operated by an oil surge in the event of more serious faults A machined surface is provided on the relay body for the purpose of testing 

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