Mell What is DY 11 transformer?
Dyn 11 means that the voltage of the secondary star winding lead the primary phase voltage by 30 degree and it corresponds to 11 o’clock.
How do you read transformer numbers?
Transformer 1 – It has a ∆-connected primary with a line-to-line rating and a winding rating of 69,000 V. The secondary is grounded-Y connected with a line-to-line rating of 12,470 V and a winding rating of 7200 V. The TTR of this transformer equals the ratio of the winding ratings: 69,000/7200 = 9.583.
What does the numbers on a transformer mean?
Lower resistance = less turns of thicker copper = lower voltage winding. Higher resistance = more turns of thinner copper = higher voltage winding.
Can we connect Dy1 and Dy11 transformer in parallel?
One can only parallel Dy1 and Dy11 by crossing two incoming phases and the same two outgoing phases on one of the transformers, so if one has a DY11 transformer, he can cross B&C phases on the primary and secondary to change the +30-degree phase shift into a -30-degree shift which will parallel with the Dy1, assuming …
What does dyn11 mean on a power transformer?
Most of the power transformer or control transformer uses Dyn11. Which means D-delta connection, y-secondary star connection, n- neutral connection and 11 mentions that the phase shift 30 deg anti close wise. Here vector group mentions that the primary voltage will be shifted by 30 in secondary side.
What do you need to know about a Transformer name plate?
Nameplate details are used to read about the transformer design. Every electrical engineer must know how to read electrical power or distribution transformer ’s nameplate details. Let start….
What does no load mean on a transformer nameplate?
No-load values are voltage rating, high side and low side etc. Full-load values depend on the connected load’s power factor, so this data are not given on nameplates only No-load data are given. Voltage rating in No-load include a winding designator such as a Long dash (─), Slant (/), Cross (×), or Wye (Y) to indicate
Which is the vector group of the dyn1 transformer?
This configuration belongs to the vector group of transformer Dyn1 where the LV lags the HV by 30°. Figure 4. Delta primary, wye secondary with neutral. The LV lags the HV side by 30°. Study the Delta Connection and you’re on your way to mastering the most common Transformer Vector Groups! Notice how the HV winding is connected in figure 4.