Three-Phase Transformer, Unbalanced Load Pre-lab
Three-Phase Transformer, Unbalanced Load Pre-lab
If given ZRN, VRY, and the turns ratio a, find the equations for VRN, IRN, IRY, SRY, and SR. (Just give the equations using the variables given in bold).
Homework Answers
Three-Phase Transformer, Unbalanced Load Pre-lab R o H1 tx й, H1 XXI Hi Bo If given ZRN, VRY, and the turns ratio a, fi...
Three-Phase Transformer, Unbalanced Load Pre-lab R o H1 tx й, H1 XXI Hi Bo If given ZRN, VRY, and the turns ratio a, find the equations for VRN, IRN, IRY, SRY, and SRN. (Just give the equations using the variables given in bold).
Three-Phase Transformer, Unbalanced Load Pre-lab R o H1 tx й, H1 XXI Hi Bo If given ZRN, VRY, and the turns ratio a, find the equations for VRN, IRN, IRY, SRY, and SRN. (Just give the equations...
A three-phase transformer bank is rated at 500 kVA and have a 34.5/12 kV voltage ratio....
A three-phase transformer bank is rated at 500 kVA and have a 34.5/12 kV voltage ratio. Find the following ratings of each individual transformer in the bank when the transformer is ∆-Y connected: high voltage, low voltage, turns ratio (a), and apparent power.
Draw schematic (connection) diagrams for three-phase Y-Y and Y-Δ connected transformers using three single-phase (50 VA,...
Draw schematic (connection) diagrams for three-phase Y-Y and Y-Δ connected transformers using three single-phase (50 VA, 120V/25V) transformers you have previously worked with in the lab. Show proper dot markings for each configuration. I. 2. Find the line-line voltage ratio (VuVa) for each configuration. For a three-phase Δ-connected resistive load (25 Ω in each leg), connected on the transformer low voltage side, calculate the line current on each side of the transformer for each configuratio Is it safe to operate...
1.6 load not in a three phase system) is rated at 50 KVA with a power...
1.6 load not in a three phase system) is rated at 50 KVA with a power factor of 0.8 lagging. A what is the power factor angle? 1.7. For a balanced three phase system, if the wye connected load has impedance 50+20j, determine the total (a single load, complex power of the load if 120225° V rms (ignore the line impedance). 1.8 An ideal transformer has a tuns ratio (N2/NI) of 6, if the magnitude of the primary port (port...
The following diagram shows a basic structure of energy distribution. In the thermoelectric plant, a three-phase...
The following diagram shows a basic structure of energy
distribution. In the thermoelectric plant, a three-phase generator
feeds an elevator transformer which has an output of 230kVrms in
each of its phases. The relation that is had in this transformer is
1:60. The transformer acts as a balanced three-phase source which
supplies two parallel three-phase networks represented by the
high-voltage lines. These high-voltage lines have a resistance per
line of Rw = 10Ω and are connected to a step-down transformer...
A 400-MVA, 200-kV/20-kV, three phase Y-Y transformer has an equivalent series impedance of ZTL = 0.012...
A 400-MVA, 200-kV/20-kV, three phase Y-Y transformer has an equivalent series impedance of ZTL = 0.012 + 20.0162 per phase referred to the low-voltage side (secondary side). The transformer is supplying a three-phase load of 300-MVA, 0.8 power factor lagging at terminal voltage of 20 kV (line-to-line) on its low-voltage side (secondary side) as shown in Fig. 22. The primary is supplied from a transmission line with an impedance of ZL = 0.5 + j1.0 per phase. The line-to-neutral load...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary windings of transfor Assume the transformer has a turns ratio of unity mer are Y-connected a) 3 PTI On the top of voltage plot on next page indicate the diodes that will be conducting during different intervals of time. b) 17 PT] Plot the...
d) Consider an ideal, single-phase 2400V-240V transformer. The primary is connected to a 2200V source and...
d) Consider an ideal, single-phase 2400V-240V transformer. The
primary is connected to a 2200V source and the secondary is
connected to an impedance of 2Ω ∠36.9o , find all the values in
Table 1.
Table 1
No
Parameters
1
The secondary output current and voltage.
2
The primary input current
3
The load impedance as seen from the primary side.
4
The input and output apparent power
5
The output power factor
e) A 30MVA 33/11 kV star-delta three phase...
Fig Qshows the one-line diagram of a three-phase power system. As shown in Fig. Q3. the...
Fig Qshows the one-line diagram of a three-phase power system.
As shown in Fig. Q3. the two zones are connected by a 400 MVA,
240-kV/24-kV, Ý-A three phase transformer. The Y-A three phase
transfonmer has an equivalent series impedance of ZTH - 1.2 + j1.6n
per phase referred to the high voltage side (primary side). The
three-phase power system can be studied with per unit quantities
using base values of S-500 MVA and 240 kV in zone 1.
By using...
Fig. Q3 shows the one-line diagram of a three-phase power system. As shown in Fig. 23,...
Fig. Q3 shows the one-line diagram of a three-phase power system. As shown in Fig. 23, the two zones are connected by a 400 MVA, 240-kV/24-kV, Y-A three phase transformer. The Y-three phase transformer has an equivalent series impedance of 2T - 1.2 + |1.6 per phase referred to the high-voltage side (primary side). The three-phase power system can be studied with per unit quantities using base values of So=500 MVA and 240 kV in zone 1. 2 -1.61253.15" Line...
Three-Phase Transformer, Unbalanced Load Pre-lab R o H1 tx й, H1 XXI Hi Bo If given ZRN, VRY, and the turns ratio a, find the equations for VRN, IRN, IRY, SRY, and SRN. (Just give the equations using the variables given in bold).
Three-Phase Transformer, Unbalanced Load Pre-lab R o H1 tx й, H1 XXI Hi Bo If given ZRN, VRY, and the turns ratio a, find the equations for VRN, IRN, IRY, SRY, and SRN. (Just give the equations...
Draw schematic (connection) diagrams for three-phase Y-Y and Y-Δ connected transformers using three single-phase (50 VA, 120V/25V) transformers you have previously worked with in the lab. Show proper dot markings for each configuration. I. 2. Find the line-line voltage ratio (VuVa) for each configuration. For a three-phase Δ-connected resistive load (25 Ω in each leg), connected on the transformer low voltage side, calculate the line current on each side of the transformer for each configuratio Is it safe to operate...
1.6 load not in a three phase system) is rated at 50 KVA with a power factor of 0.8 lagging. A what is the power factor angle? 1.7. For a balanced three phase system, if the wye connected load has impedance 50+20j, determine the total (a single load, complex power of the load if 120225° V rms (ignore the line impedance). 1.8 An ideal transformer has a tuns ratio (N2/NI) of 6, if the magnitude of the primary port (port...
The following diagram shows a basic structure of energy
distribution. In the thermoelectric plant, a three-phase generator
feeds an elevator transformer which has an output of 230kVrms in
each of its phases. The relation that is had in this transformer is
1:60. The transformer acts as a balanced three-phase source which
supplies two parallel three-phase networks represented by the
high-voltage lines. These high-voltage lines have a resistance per
line of Rw = 10Ω and are connected to a step-down transformer...
A 400-MVA, 200-kV/20-kV, three phase Y-Y transformer has an equivalent series impedance of ZTL = 0.012 + 20.0162 per phase referred to the low-voltage side (secondary side). The transformer is supplying a three-phase load of 300-MVA, 0.8 power factor lagging at terminal voltage of 20 kV (line-to-line) on its low-voltage side (secondary side) as shown in Fig. 22. The primary is supplied from a transmission line with an impedance of ZL = 0.5 + j1.0 per phase. The line-to-neutral load...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary windings of transfor Assume the transformer has a turns ratio of unity mer are Y-connected a) 3 PTI On the top of voltage plot on next page indicate the diodes that will be conducting during different intervals of time. b) 17 PT] Plot the...
d) Consider an ideal, single-phase 2400V-240V transformer. The
primary is connected to a 2200V source and the secondary is
connected to an impedance of 2Ω ∠36.9o , find all the values in
Table 1.
Table 1
No
Parameters
1
The secondary output current and voltage.
2
The primary input current
3
The load impedance as seen from the primary side.
4
The input and output apparent power
5
The output power factor
e) A 30MVA 33/11 kV star-delta three phase...
Fig Qshows the one-line diagram of a three-phase power system.
As shown in Fig. Q3. the two zones are connected by a 400 MVA,
240-kV/24-kV, Ý-A three phase transformer. The Y-A three phase
transfonmer has an equivalent series impedance of ZTH - 1.2 + j1.6n
per phase referred to the high voltage side (primary side). The
three-phase power system can be studied with per unit quantities
using base values of S-500 MVA and 240 kV in zone 1.
By using...
Fig. Q3 shows the one-line diagram of a three-phase power system. As shown in Fig. 23, the two zones are connected by a 400 MVA, 240-kV/24-kV, Y-A three phase transformer. The Y-three phase transformer has an equivalent series impedance of 2T - 1.2 + |1.6 per phase referred to the high-voltage side (primary side). The three-phase power system can be studied with per unit quantities using base values of So=500 MVA and 240 kV in zone 1. 2 -1.61253.15" Line...
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