Seeking help with current transformer issues
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1. How is the current transformer connected to the DCS to enable display of operating conditions? 2. Is it necessary to connect a wattmeter (wh) in series with a current transformer to measure electricity consumption?
The current transformer outputs a 4–20 mA signal or a voltage signal of 0–5 or 10 V. It is by receiving this signal that we can determine the current level. The current transformer does not need to be connected in series; it is sufficient for the cable to pass through it
It is converted into an instrument signal by a current transmitter and transmitted to the DCS!
Thank you! There are two points I’m not quite sure about: 1. Isn’t a voltage signal something that only voltage transformers produce? 2. If I want to know how many kilowatt-hours of electricity the motor has used, do I need to connect an ammeter in series?
If it’s accurate, then install an electricity meter; if not, use a clamp meter to check the current and then do the calculations
1. A 4-20mA signal is output to the DCS through a rheotrode. 2. Meters do not require a current transformer to be connected in series to measure electricity consumption.
The current is converted to 4-20MA through a current transmitter. The incoming and outgoing wires of the current transformer must pass through the current coil of the meter, and the voltage coil must have voltage applied to it.