Ignacio Angelo Sayson’s Post

the power of an impulse voltage generator (IVG)..You will easily locate the point where your insulation is weak .and where your cable faulty ..thats a 95mm three core cable 6.6kv..

There are several ways to perform a transformer stability test, however, I will explain one of the ways we choose to perform this test. Inject from the LV busbar and measure the results in the transformer protection and transformer LCP panel. But before injecting make sure to prevent false tripping and unnecessary availability of voltage in HV bus bar, we must take into consideration. Calculate the required LV and HV currents of the power transformer for differential and restricted earth faults and also calculate the required CT secondary results for verification of these parameters during injection. LV Side: Since we are going to inject into the LV busbar from the outgoing panel, the corresponding CT link must be shorted. Closed both CB of outgoing and incomer feeder so that power reaches LV terminal of transformer and make sure to rack out VT. Make MCB off the trip circuit and connect the cable from the generator to any outgoing feeder from the LV busbar. HV side: On HV side voltage should reach to CT of transformer bay, therefore,open high speed earth switch & close circuit breaker to provide path for current, but we don’t need current up to HV busbar, so make sure to close earth switch after circuit breaker so that small HV current after passing through CB direct toward earth.

Starting from noise, we can find the source of noise by using a thermal imager on the 11kv cable. Don't forget when we switch off power from the switchgear, do the following steps for our safety and the team at work: 1. Make sure the switchgear is in switch off condition 2. Make sure the VD4 position is in rackout condition 3. Make sure the switchgear is in grounding condition 4. Make sure the lotto switchgear before working 5. Re-make sure the remaining voltage by manually grounding using a cable to the grounding busbar locally before we make direct contact with the 11kv cable

If a cable sheath is not correctly bonded to ground, a floating potential condition can result. This can expose SVLs to steady-state voltages that exceed their V-I characteristic, causing low-magnitude current conduction. Listen to lecture by Jon T. Leman. #highvoltage #electricalengineering #INMR #energyindustry #powersystems https://lnkd.in/g96R7Cp8

Cable outlet terminal Type: SF6-12/220 Rated voltage: 12kV

The operation of an earth leakage circuit breaker (or shorten ELCB) is based on the fact that the algebraic sum of the currents in any healthy single phase, three phase and three phase and neutral system is zero. This simply means that in a single phase system the current flowing in the line conductor is equal and opposite to the current in the neutral conductor, and in a three phase system the vectorial current in one line is equal and opposite to the vectorial sum of the currents in the other two lines. The same applies in three phase and neutral systems. If these conductors are passed through a core balance transformer, and the circuit is healthy, no excitation of the transformer results. However, if an earth fault occurs in the system, the earth current returns to the earth connection on the supply transformer via, an earth conductor or general earth. Since these conductors are external to the core balance transformer, the currents passing through the core balance transformer are no longer balanced, and an EMF is induced into the secondary winding of the core balance transformer. Read more https://lnkd.in/dvQy8ynT

what is the equipment of the electrical distribution measurement of SAG...? difference between 2 poles..

DC Ground Fault Locators’ purpose is to check whether the connection or mechanical properties between winding and lead are good, and whether the resistance between each phase winding is balanced, so as to ensure the safe operation of the transformer.