Hi!
I have a situation where a customer plans to install an aluminum tube between 2 Measuring Transformers and in the middle, to support the tube I have 1 rigid insulator. To make the connection between the tube and the Measurement Transformer terminals I am thinking of using "Expansion" Type...
Hi all!
I've actually having some issues related to the theme Automatic Voltage Regulator in Power Transformers. The scenario is: a Substation with only one Power Transformer that is equiped with an OLTC and an AVR. The client (national grid company) recently have decide to construct a new bay...
Hi!
I need help to sizing a Current Limiting Reactor to be inserted in series in the Power Transformer Tertiary 15kV Circuit, as you can see in the attached file.
After checking several documents I found that I can sizing the Current Limiting Reactor by applying the following formula:
Xr =...
Hi everyone!
Could someone please be so kind and provide a marshalling box wiring diagram for this situation particular situation where I've to 2 double pole voltage transformer with two secondary windings in a 15kV 3-phase busbar.
Thank you in advanced.
Hi!
I need help to sizing the MV cable suitable for the following situation:
I have a 220/60/15kV Power Transformer. The tertiary of the Power Transformer will be connect to a 15/0.4kV (150kVA) Transformer for supplying the Substation Auxiliary Services.
The maximum tertiary power of the...
I've 120A in a 110Vdc circuit and i've to choice a ammeter and is external current shunt.
How we size a current shunt to a DC Ammeter?
How the shunt works with the ammeter?
thanks in advanced
Hello all,
I need help in the following issue: Busbar calculation.
Formulas
Dimensioning criteria
Calculation Steps
Could you please give some help in this? Maybe you know a reference guide or a paper.
Thanks
Do you know any document that can help me in the dimensioning/calculation of High Voltage Reators:
Neutral Grounding Reactors
Shunt Reactors
Current Limiting Reactors
Thanks
Miguel
I'm from Europe(Porugal) and need help.
I'm very interesting in the following subjects:
1 - Power System Protection
2 - Substation Design
I need you people to give me guide books (download or to buy) that cover these fields. Tell me your.
thank you
Miguel
A magnetic voltage transformer will be protected from ferro-resonance oscillation by connecting a resistor across the open delta point in the three-phase secondary winding.
I need to know the formulas to dimensioning this damping reistor
VT data:
30000: ?3 - 100: ?3 - 100: 3 V
Pe=120VA...
Dear friends,
I'm working in a power substation and i've to calculate the protection device of a high voltage VT secondary against short-circuits. Has you certenley know this protection is to prevent the VT lost if a short-circuit occurred.
Could someone please tell me how this protection...
