Electrical Equipment Its Selection And Arrangement With Special Reference to F
Electrical Equipment Its Selection And Arrangement With Special Reference to F
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The meaning of 60 minutes phase displacement is that the secondary current is 1 degree (1/360 of a cycle) ahead of the primary. If the primary has a lagging current, this dis- placement tends to make a wattmeter or watt-hour meter reading too high, whereas the ratio error tends to make it top low; so that the two errors tend to neutralize each other.
The effect of phase displacement on wattmeter and watt-hour meter indications is as follows: 1. 00 f 0. 02 of 1 0. 90 The error per cent, introduc...ed per \ 0. 85 of 1 0. 80 degree of phase displacement is } 1. 3 0. 70 1. 7 With a lagging current having a power factor of Fig. 92 shows ratio and phase displacement curves of a trans- former such as was used in Figs. 89 to 91, under various condi- tions of loading, with various instruments connected to the transformer secondary. Fig. 93 is similar to Fig. 92, but refers to a transformer of 10 volt-amp, secondary capacity.
1 For example, where charges for electric energy are made from the meter readings.
What to read after Electrical Equipment Its Selection And Arrangement With Special Reference to F?
You can find similar books in the "Read Also" column, or choose other free books by Harold Warner Brown to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The meaning of 60 minutes phase displacement is that the secondary current is 1 degree (1/360 of a cycle) ahead of the primary. If the primary has a lagging current, this dis- placement tends to make a wattmeter or watt-hour meter reading too high, whereas the ratio error tends to make it top low; so that the two errors tend to neutralize each other.
The effect of phase displacement on wattmeter and watt-hour meter indications is as follows: 1. 00 f 0. 02 of 1 0. 90 The error per cent, introduc...ed per \ 0. 85 of 1 0. 80 degree of phase displacement is } 1. 3 0. 70 1. 7 With a lagging current having a power factor of Fig. 92 shows ratio and phase displacement curves of a trans- former such as was used in Figs. 89 to 91, under various condi- tions of loading, with various instruments connected to the transformer secondary. Fig. 93 is similar to Fig. 92, but refers to a transformer of 10 volt-amp, secondary capacity.
1 For example, where charges for electric energy are made from the meter readings.
What to read after Electrical Equipment Its Selection And Arrangement With Special Reference to F?
You can find similar books in the "Read Also" column, or choose other free books by Harold Warner Brown to read onlineMoreLess
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