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Questions tagged [delta]

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48 views

Delta to delta 2000 kVA transformer

I have a delta to delta 2000 kVA transformer that on power up with no load except whatever is in the main switch gear I am getting 400 volts to ground on one phase 280 on another and 95 on another, ...
29 views

Loading one line from Three Phase Power Delta Configuration

I have been trying to determine whether or not I can run one line from 3-phase power into a power conditioner that requires single-phase input. The current draw on this line would be around 10 A. ...
9k views

Why don't the currents clash in a 3 phase delta connection?

Consider 3 windings, a, b and c. L1 is connected to A, L2 to B and L3 to C. The 3 windings are then connected in delta. If we could freeze frame the voltage waveform where L1 and L2 are positive ...
74 views

Where does the sum current of the three currents flow?

In the following star and delta connections, if each individual current enters via Phases R, Y and B, where does the sum of the three currents (that is Ia+Ib+Ic) flow after meeting at the common point ...
19 views

Brushless motor (Delta-wye switch or overvolting at lower current drown)

I have been playing with Motor CAD for a while and can't decide what to do. Here is my problem. I have a building a two-hub electric mountain board. I have motors that are rated for 350W 36V which I ...
137 views

what will happen if the motor that is designed for delta connected in star connection

I have a motor which is designed for 3 phase, 380V. The power rating of motor is 132kw and motor stator winding is connected in delta connection. If I connect the same motor stator winding in star ...
22 views

AD7173-8 gain register default value

In the AD7173-8 ADC, the default gain value is said to depend on the IC type. In the datasheet, the value is mentioned as 0x5XXXX0. But I couldn't find the exact value in the datasheet anywhere. ...
65 views

How to implement a dirac delta as input signal for this system

y[n] = b0x[n] +b1x[n-1] I have this MA filter in matlab as following ...
638 views

How is Line and Phase Voltage the same for a Delta connected system?

I am having a little bit of confusion for some reason understanding how the phase and line voltage can be the same for a delta connected system, i understand why the current is different for the phase ...
709 views

3 phase motor running on single phase using steinmetz delta connection

How do 3 phase motors manage to run on single phase power using the Steinmetz delta connection with a single capacitor? I thought capacitors only shift the phase angle upto 90 degrees, whereas 120 ...
45 views

how to get the line voltage of 3 phase delta circuit with power factor known at first?

In the following picture, it shows that a black box at right. the circuit inside the black box is a 3 phase load balanced delta connection circuit. the line voltage of it is 500V and the power factor ...
73 views

Three-phase circuit with line impedance

I'm having some trouble with the first part of an exercise. If I only have V1, and Zl, how can I find what the line voltage V2 is equal to? So that, then I could calculate the phase currents A1,A2,A3....
42 views

684 views

6 phase forked star transformer

I have a problem i'm trying to get to the bottom of. I am basically trying to find the secondary line voltages of a three phase delta primary, with a six phase forked star connected secondary ...
245 views

Y-Delta Transformation Voltage across resistor

In effort to solve for Vx, I would like to transform the Delta network (the 3 3 ohm resistors) to a Y network. My question is, where would Vx be read ? Thanks, Liam
40k views

Why choose delta over star connection for a 3 phase motor with a VFD?

With respect to a particular application, why is it better to use a delta connection over a star? I have a motor/pump hooked up to a vfd in delta. For my application, Im required to adjust the flow ...
1k views

Total power measurement in 3-phase unbalanced delta system

I have a 3-phase system with an unbalanced delta load, as seen in the figure below. I want to measure the total apparent and active power consumption and if possible, the respective power consumption ...
203 views

Linear Circuit Analysis: Source Transformation of DC Network

The 1st (upper) picture is the given problem. The 2nd (lower) picture is my attemps to the solution. I neglected the middle resistor in bridge circuit, resistor in parallel with voltage source, and ...
657 views

Earthing of HV distribution network

I am under the impression that one reason the high voltage distribution network is earthed is to dissipate electrical environmental effects (say, a lightning strike on the line). For long distance, ...
2k views

can i connect star connected motor in delta on same voltage? [closed]

My question is , is it possible to connect star connected motor in delta configuration keeping the voltage same ? if yes in what case ?
2k views

Dab vs Dac transformer

simulate this circuit – Schematic created using CircuitLab Why might one use a delta-wye transformer with the delta configured in Dab rather than Dac, or vise versa? Will this cause a ...
1k views

What are the Pros/Cons on the 30 Degree voltage phase shift between the primary and secondary of a Delta-Wye Transformer

I have searched this wonderfully informative website and learned much about Delta-Wye connections and why a phase shift in voltage would exist between the two. I am also aware that both Delta-Delta ...
124 views

Open Delta's “virtual” power factor

Open Delta yields 57% of power instead of the 86% it would yield if no 30-degree angle gets in the way. Can that 30-degree angle be corrected with a capacitor and an inductor (it requires a cap in one ...
221 views

Estimating error due to Vref deviation on delta-sigma adc

I am trying to estimate the error caused by deviation on the reference signal for the following 22 bit Delta-Sigma ADC and high precision linear voltage regulator: http://ww1.microchip.com/downloads/...