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Dear All, I am just starting new thread with some question for transformer diagnostic by using frequency response analyzer. 1) What are the difference between low impulse & sweep freq. method? 2) Is the sweep freq. method is more precise than impulse method? 3) FRA & Tan delta test are...

Hi All, Is there any details on Electrical & electronics equipment grounding practice?

Hi All, I am just starting new thread. Today, most of the protection engineers know about numerical transformer differential prot. relays & most of the relays are having three SLOPE characteristics (i.e. 7UT612, P632, RET531,T60 etc.). What should be the criteria & considerations to set third...

Hi, Electromechanical, static & numerical relays required to installed in Air condition room? or only static & numerical relays reqd. to installed in air condition room? Is it reqd. to installed relays in air condition room where ambient temp. is not more than 35 to 40 degree? What should be...

Can i get details for IEC 61850 standard is working for High impedance Restricted earth fault prot. scheme for Transformers?

Can you give me a detail information & reliability of XRIO format for testing of protective relays?

Hi All, Can you pl. give me an idea to test SIEMENS MAKE 7SN60-Transient ground fault relay by using numerical instrument? Relay is detecting ground fault based on freq. signals (100 Hz to 1kHz or more). So, my perticular question is; Transient ground fault is a pure high freq. signal without...