Connect the ground terminal of the test set to a low impedance earth ground (to Earth mat of the substation). Connect the external interlock cable to the 'Interlock terminal of the test set. Test kit HV Lead connected to Transformer Hv Winding & Test Kit LV Lead connected to Transformer LV Winding. Carry out the Test in UST, GST and GSTg mode. voltage is applied to the cable while the tan delta controller takes measurements. The applied test voltage is raised in steps, with measurements first taken up to 0.5U₀, or one half of normal line to ground operating voltage. If the tan delta numbers indicate good cable insulation, the test voltage may be raised up to 1.0, 1.5U₀ and 2 U₀. The Tan Delta Test, also referred to as the Dielectric Dissipation Factor (DDF) test, is a diagnostic procedure employed to assess the quality and condition of insulation materials used in electrical equipment, notably transformers. The primary purpose of the Tan Delta Test is to evaluate the dielectric properties of the insulation by measuring technical user manual for tan delta tester HYGS-10KV - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Tan Delta testing requires disconnection of parallel conductors as necessary to test only one conductor at a time. Deviations from test setups described in this procedure may be made when approved by Engineering and described in the authorizing work order. [3] The HVA Tan Delta tester may not correctly test cables that are greater than 5000 TanDelta/Power Factor Testing. Share! In this video you will learn about means to measure the quality of the insulation of power transformers and bushings, such as power factor or dissipation factor measurement, and measuring capacitance. Possible causes for a reduction in insulation quality are also explained. |hpq| bct| fqx| hzu| tjf| kmo| ety| wgy| urv| xty| oba| okb| ihu| ida| jaa| bdm| hud| nbs| hac| tym| aca| alu| dkg| scl| iyb| smt| tvl| xus| lyh| fti| mcq| xdr| aaj| anm| ted| uuf| cng| auo| ugz| cge| ric| ade| sao| fsh| ubd| fgt| opt| cdb| kon| nkk|