Transformer Substation Integrated Automation Syste

1>. Protection function * Three zone multi-voltage closedown over-current protection (with direction) * Low frequency decrease load (slip closedown, low current closedown) * Transformer ratio-differential protection(secondary harmonic break * Three zone current protection for bus coupler * Charge up protection for bus coupler * Protection of unbalance current with capacitor * Self heavy gas, Self slight gas * Voltage regulating heavy gas, voltage regulating slight gas * Over load protection * Over load closedown the OLTC(on-load-transformer-control) * Over current direction protection * Signal of release voltage, cooling fault, overtemperature and so on * Over/low voltage protection * Non-current/voltage protection * VT failure detection alarm * Earthed alarm 2>. Telemtering function All electric quantity use Fourier Algorithm to do AC sampling directly by high accuracy small PT and CT, which has high sampling accuracy and can measure the parameters of loop U, I, P, Q, COS, F, kWh, kvarh and so on. And it can display measured primary actual value and accept measured value of transformer temperature from temperature transducer. 3>. Remote signal function * External remote signal: Switch signal such as switch position, breaker position, manual-switch position, accumulated energy state, gas, temperature and so on. The type of remote signal can be set freely (locale configuration). * Events remote signal: Signal of slight gas, overtemperature, earthed, PT break, over-load, control loop break and so on * State of remote signal: Signal of protect action, device abnormal, remote signal changing, device reset and so on.4>. Remote/Local Switch off /on on-load-transformer-control rise/fall/stop/rapid stop. 5>. Events record function It can record type, time and operating value (current value) of 128 events automatically.