Guru
Joined: 13/10/2014
Location: AustraliaPosts: 1727
| Posted: 05:24am 22 May 2024 |
I thought I would post the circuit for the DC input Peak reading meter with an extra output connection for the driving the Nano Controller via the Ext Trip Pin.
The trip connection to the Controller is not really needed for general lower power usage, less then 4kW.
But the meter itself is a very informative tool when mounted on the inverter for monitoring Peak DC input via the Hall effect Sensor or DSO socket.
The Sensor can be mounted by itself and only used with a DSO for occasional inverter testing and monitoring of inverter DC currents. The sensor only needs 12v from the Nano to run.
The Hall Sensor is a permanent part of my inverter. The Sensor is mounted so that +50V DC 0G cable from the Kilovac relay output passes through the Sensor and continues on to the Power board capacitor banks.
The Hall effect Sensor I use is a 12v 500A unit and can easily read to over 750A.
I used an tiny isolated supply on the original but not really needed, these small DC-DC modules are also used in the WG inverter Power board.
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Link to my Peak Current Meter information.
I said in the old post that it was hard to calibrate, but turns out it's easy, if anyone is interested
Hall Sensor
Make sure to select the correct current rating and DC voltage if you purchase one.
EDIT:
I should have mentioned the option of substituting a LED bar-graph strip for the analogue Meter.
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Edited 2024-05-23 08:41 by KeepIS