A single-phase, 33 kVA, 2300/230 V, 60 Hz transformer has the following parameters (referred to the HVS): Zeq.H= 1.8+j3.4 ohms. The transformer is connected to a load whose power factor varies Neglect magnetizing impedance. (a) Determine the worst-case voltage regulation for full-load out put. (b)* What is the power factor for the case of worst regulation? (c) What is the power factor angle to have voltage regulation al most equal to zero? (a) Worst case voltage regulation: . %

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A single-phase, 33 kVA, 2300/230 V, 60 Hz transformer has the
following parameters (referred to the HVS):
Zeq.H= 1.8+j3.4 ohms.
The transformer is connected to a load whose power factor varies.
Neglect magnetizing impedance.
(a) Determine the worst-case voltage regulation for full-load out-
put.
(b)* What is the power factor for the case of worst regulation?
(c) What is the power factor angle to have voltage regulation al-
most equal to zero?
(a) Worst case voltage regulation: %
(b) Power factor for worst regulation:
(c) Power factor (absolute value) angle for zero-regulation:
degrees.
Transcribed Image Text:A single-phase, 33 kVA, 2300/230 V, 60 Hz transformer has the following parameters (referred to the HVS): Zeq.H= 1.8+j3.4 ohms. The transformer is connected to a load whose power factor varies. Neglect magnetizing impedance. (a) Determine the worst-case voltage regulation for full-load out- put. (b)* What is the power factor for the case of worst regulation? (c) What is the power factor angle to have voltage regulation al- most equal to zero? (a) Worst case voltage regulation: % (b) Power factor for worst regulation: (c) Power factor (absolute value) angle for zero-regulation: degrees.
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