Calibration of 100 A/50mA Instrument Current Transformer Energy Meter Using Bisection Method

In power distribution systems of many countries, service lines are directly connected to the consumer meters without any load management system. Conventional meters lack in internal power quality measurement, and utility also cannot measure the power factor and other values during the month. This study aims to design a smart kit that aids conventional single-phase energy meters and calculates the power values of all phases by measuring the voltage, current, and power factor on the load side; and the calculated power values will be sent to the cloud data base Voltage and current are measured by a current transformer (CT) and a potential transformer (PT) connected on both the incoming side and the load side in order to avoid meter bypassing. A program-based algorithm has also been developed to calculate the power factor and other power quantities. This IoT-based energy meter uploads the measured quantities to an online database, and the same are also displayed on an LCD meter. An Android™-based application is also developed for user-end control. Consumers can observe the resultant values, switch loads remotely, and pay electricity bills through the same application. When the power factor of any consumer is less than the standard value, the system will automatically notify utility company about the affecting load.

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Epoxy Casting Process and Complete Set Test for New 10 kV High Voltage Electric Energy Meter Based on All-fiber Optical Current Transformer

Proceedings of the 2015 International Conference on Electrical, Electronics and Mechatronics ◽

10.2991/iceem-15.2015.6 ◽

2015 ◽

Author(s):

Fuli Yang ◽

Lujun Zhang ◽

Bin Li

Keyword(s):

High Voltage ◽

Electric Energy ◽

Casting Process ◽

Current Transformer ◽

Energy Meter ◽

Fiber Optical ◽

Complete Set ◽

Electric Energy Meter

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Research on Application of New 10kV High Voltage Electric Energy Meter Based on All-fiber Optical Current Transformer

Proceedings of the 2015 International Conference on Electrical, Electronics and Mechatronics ◽

10.2991/iceem-15.2015.7 ◽

2015 ◽

Author(s):

Fuli Yang ◽

Lujun Zhang ◽

Bin Li

Keyword(s):

High Voltage ◽

Electric Energy ◽

Current Transformer ◽

Energy Meter ◽

Fiber Optical ◽

Research On Application ◽

Electric Energy Meter

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Kajian Ketelitian Current Transformer (CT) Terhadap Kesalahan Rasio Arus pada Pelanggan 197 kVA

Energi & Kelistrikan ◽

10.33322/energi.v11i1.390 ◽

2019 ◽

Vol 11 (1) ◽

pp. 9-16

Author(s):

Aas Wasri Hasanah ◽

Tony Koerniawan ◽

Yuliansyah Yuliansyah

Keyword(s):

Electricity Consumption ◽

Current Transformer ◽

Indirect Measurement ◽

Energy Losses ◽

Flow Ratio ◽

Current Ratio ◽

Accuracy Class ◽

Ratio Error ◽

Energy Meter ◽

Before And After

With the growth of electricity consumption getting bigger, the possibility of greater losses arises from measuring energy in customers. One cause of the losses due to mistakes in flow ratio CT (Current Transformer) installed on APP Box indirect measurement. Necessary to test the CT accuracy class to determine the current ratio error limits set by the standard PLN. Then do the replacement on the CT accuracy class to resolve this issue. This activity is done at the customer PT. Astra Int Auto 2000 by replacing the CT accuracy class of 0.5 becomes 0,5S. There is a comparison of the measurement between the two different classes. Based on the results of tests performed, a decline in the current ratio error before and after the replacement of accuracy class. After calculating the error margin of the second flow ratio CT installed that are not measured by the energy meter. This Value kWh that is the losses to PT. PLN (Persero) Area Depok. So understanding CT as one of the tools of measurement (instrumentation) should be changed to a point of transaction (point of transaction). So that the revenue gains kWh a business orientation that is fundamental to PLN by pressing slightly possible energy losses (losses) that occur in the measurement system.

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