tulum
Industrial
- Jan 13, 2004
- 335
The utility provided the following;
Supply Voltage: 12.48KV,
Short Circuit Data:
L-G Amps: 1869A
P-P Amps: 1782A
3P Amps: 2058A
Z1 = 1.05 +j3.34
Z0 = 1.22 +j4.39
This is on the primary of a pole top transformer that feeds one of our buildings. It is unclear yet, but I think the transformer is a 375kVA 12.48kV - 600V transformer (not sure of configuration). The transformer impedance is around 2.5%.
What does the z1 and z0 represent? If it is the positive and zero sequence impedances, where is the negative sequence impedance? How do I determine the x/r ratio for the 3p and L-g SC currents? How do I translate this to the secondary.
Sorry for the elementary question but this is not what I do in my day to day operations.
Regards,
TULUM
Supply Voltage: 12.48KV,
Short Circuit Data:
L-G Amps: 1869A
P-P Amps: 1782A
3P Amps: 2058A
Z1 = 1.05 +j3.34
Z0 = 1.22 +j4.39
This is on the primary of a pole top transformer that feeds one of our buildings. It is unclear yet, but I think the transformer is a 375kVA 12.48kV - 600V transformer (not sure of configuration). The transformer impedance is around 2.5%.
What does the z1 and z0 represent? If it is the positive and zero sequence impedances, where is the negative sequence impedance? How do I determine the x/r ratio for the 3p and L-g SC currents? How do I translate this to the secondary.
Sorry for the elementary question but this is not what I do in my day to day operations.
Regards,
TULUM