How to install a watt meter on a water pump motor

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This post was last edited by WSRYLONG on 2015-8-21 at 22:22. There is an existing water pump room in which several pumps are driven by 10KV high-voltage motors. A single main electricity meter is installed on all of these high-voltage motors, allowing for the measurement of the total electricity consumption of all the pumps. I now want to install a separate electricity meter for one of the water pumps. I would like to ask everyone: what additional meters are needed, and how should the wiring be connected? One pump is in operation while the other is on standby. I want to know whether it’s necessary to shut down the high-voltage cabinet in the entire pump room when installing an electricity meter, and whether voltage transformers and current transformers also need to be installed Does the high-voltage power supply circuit of this water pump also need to be disassembled and assembled? From a production perspective, the high-voltage system of the entire pump house cannot be shut down, and from a safety standpoint, it is desirable to avoid any work involving the installation or removal of high-voltage power supply circuits. I can’t figure it out and am hesitating; I’m reaching out to the expert Haiyou for advice. I also studied this a bit, and here are my thoughts – I’m not sure if they’re correct: 1. Since all the high-voltage motors in the pump room are equipped with a single main electricity meter, and voltage transformers are already available, there is no need to add additional voltage transformers; connections can be made directly from the PT busbar. 2. For a pump motor that is to be equipped with a separate meter, if it already has an ammeter installed, this means that a current transformer is already in use; therefore, there is no need to add another current transformer. The new meter can be connected to this existing current transformer. In this way, the high-voltage power supply circuit of the pump does not need to be disassembled or assembled. 3. If the water pump does not currently have an ammeter, it means that there is no current transformer; therefore, a current transformer needs to be added. The high-voltage power supply circuit for this pump must pass through the current transformer, which requires the high-voltage power supply circuit to be disconnected, routed through the transformer, and then reconnected. 4. Is it necessary to shut down the relevant high-voltage lines for wiring the existing voltage transformers and current transformers? If it keeps running, is it in compliance with safety regulations and is there any risk? I don’t understand circuit knowledge; I would be extremely grateful if experts could offer their guidance.