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Hi everyone, Do you recommend any brand for "transformer oil treatment plant" for site works? Thanks in advance.

Can we use this for professional.?

Hi everybody, Which tool you suggest? The best is Etap, Neplan or another one?

Hi everybody, I tested 180 MVA, YNd1 transformer secondary winding DC resistance as follows, a-b = 2,5 ohm b-c = 3,5 ohm c-a = 2,5 ohm What can be the reason of this test result? Why "b-c" resistance is different? Thanks in advance..

Hi everyone, I want to learn that can we generate some volts using a 3phase 380V motor.? For 1500 rpm, there is a wheel working with water flow and some reductor. Just with rotating the motor's rotor, can we read some volts on stator and can we energize some lamps. Thank you..

Marmite, Generator will remain connected servicing the site load.

ScottyUK, Once the grid shuts down, does any vector shift appear with generator voltage? Somewhere I read that ROCOF relay is better for this situation

Hi everyone, There is a cogeneration plant synchronized with the grid and there is coupling circuit breaker for connection to grid. When grid further breaker opens, we want to trip the coupling breaker. Which one of "vector shift relay" and "rate of change of frequency relay" can overcome this...

Hi, How can we set motor 51 protections low set, high set or IDMT?

The relay model is A20. (just generator diff) I solved the problem today. Polarities has changed, so I do the correct wiring. Now relay sees the correct values and angles. thanks all of you

The transformer is Ynd11

hi, we have a problem about current angles for generator differential protection-REG670 relay. Between generator and transformer there is no CB. CB is after transformer. And for synchronizing with grid, they did replace B and C phases on the primary side(grid side) of transformer. Does this...

Hi everyone, I have tested some generator protection relays branded SEP at a power plant. I have a problem with U< function, it is blocked in system de-energized condition. I couldnt test U< function, I cannot find any documentation about these brand ? Do you now any about it or the website of...

Does battery acid level affect the capacity of battery?

Hi I cannot install ABB CAP505 software on Windows 7. Problem may be related to MicroSCADA account problem. how can I overcome this problem? thanks

Primary-secondary testing, protection ,power system.

Hi, Can you give some sources on the internet to attain articles and papers?

How can I attain the IED connectivity packages(like ABB) or IED drivers (like Siemens) for Alstom Micom relays? I didnt find on the internet.

Thank you. Do you have a link to download St. Pierre's Short Circuit book.?

hi, How can we calculate the zero sequence impedance of a transformer? Can we do by using nameplate values?