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Thank you all for the prompt response. I am interesting in inspections for several MCCBs on different costumes. What do you think should be the necessary Injection Current of the device? The main part of my costumes are industrial costumes.

Hello everybody, i am interesting in buying a device to test MCCBs (Moulded Case Circuit Breakers), especially for Instantaneous overcurrent trip test. Any suggestions for devives? Is Sverger 780 suitable to do it?

I am planning to use CoreLine Tempo BVP120 LED120/NW S. Total distance is about 700m. Already, i have 3 separate circuits, but if i use smaller wire maybe will cause problems with voltage drop.

Hello! I designed an outdoor LED Street Lighting with 8 poles, 2kW total. When sizing the cable I chose to use a 5x10mm2 cable (for voltage drop). Each pole has two lamps with the following data. Power consumption at dimming:120 W Inrush current: 47.2 A Inrush time: 600 ms Driver current: 700...

Hello guys, I am going to coat Iron Motor Shell to protect it from Sulfuric acid. What do you suggest as the best coating considering corrosion resistance? many thanks to everyone!

Hello, It is observed that on a back pressure turbine we cannot control extraction and exhaust pressure. Particularly when extraction pressure is out of control exhaust pressure is stable. But when extraction pressure is in control ιt is observed oscillations on both pressures. Any ideas what...

Maximum total head : 130m Maximum Flow: 300m3/h

Hello Guys, I am interested in find a high pressure water pump driven by diesel engine. Could you suggest me suppliers in Europe?

Hello Guys, I am interested in replacing an Automatic Voltage Regulator of Synchronous Generator 6MVA. Could you suggest me suppliers in Europe?

Hello, We would like to change the size of condenser of the existing installation. Which factors should we take into account? Also what are the EN 12900 and ARI rating conditions?

redlinej i think you should read the "Applying Static Excitation Systems" by R.C. Schaefer. In this paper is described, how 6 SCR system causes a negative voltage to be applied into the field

Mikel, thank you for your assistance. I found these papers very helpful. Also i would like to add one more. As for the size of my generator, it is a 7MVA, salient pole with 4...

So the key words i think are, "override the voltage regulator loop". That means that its (limeters) role isn't to protect the generator from overcurrent or overheating, but to prevent an unpleasant situation.

Hoxton, you said that " limiters which can over ride the basic settings ". So, limiters don't allow protection to operate(e.g. send a signal to the protection system and for a specific time it is forbidden to trip)? This is little different with Scotty and waross view.

Scotty, thanks a lot. So if I'm not mistaken, it's more like first and second zone of protection.

So, why we use both limiters and protection system? Is it possible to use only limiters or protection system by adjusting them ( time and setpoint ) so they operate for transient and steady state?

Hello Guys, Limiters do not replace the protection system but only prevent the protection system from tripping unsecessarily under extreme transient conditions. But how the limiters and protection system cooperate? The limiters operates faster than protection for the same fault condition?

ScottyUK, thank you very much . As to bridge is fully-controlled .

Irrespective of vendors, how can I conclude with certainty that i choose the correct model? Which parameters (overshoot,rise time) should be compared?

Note i would like to highlight that i plan to change only the AVR and not all the Excitation System!