protection system at the transformer

protection system at the transformerequipment Protectiona) Relay BucholzBucholz relay is a relay
or relays that function tool
detecting and securing the transformer interferencethat cause gas .The emergence of the gas can be caused by several things, includingare :􀂃 short circuit between windings on or in phase􀂃 inter- phase short circuit􀂃 inter- phase short circuit to ground􀂃 flame electric arc between the laminate􀂃 arc electrical fire due to poor contact .Safety pressure , these tools form a membrane madeof glass , plastic , copper or resilient valve , assafety transformer tank to rising gas taparise in the tank will rupture at a certain pressureand lower power than the power transformer tangi .b ) Relay pressureThis relay serves a similar function as relays Bucholz . Its function isis secure against interference in the transformer .The difference is only a relay works by a rise in gas pressuresudden and immediate mentripkan circuit breaker ( PMT ) .c ) Differential RelayServes to secure the transformer to the disorder inin transformers , among others, is the incidence of flash over betweencoil to coil or coil with a tank orwindings with windings in the coils or differentcoil .d ) Overcurrent RelaysFunctioning securing in excess of the current transformercurrent allowed to pass from transformers serve targeted andmore flows can occur because of overload or disturbancesshort circuit .e ) Relay ground tankThis tool serves to secure transformation Mator when thereshort circuit between voltage parts with partthat no voltage on the transformer .f ) Relay Connecting landThe function of this tool is to secure the transformer ifdisruption of the phase short circuit to ground .g ) Thermal RelayThis tool serves to prevent / secure the transformerof damage to the insulation on the coil , due to more heatcaused by overcurrent . The quantity measured in theThis relay is a rise in temperature .