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vingerling avatar image

Blue Smart IP22 charger trips automatic fuse

My Blue Smart IP22 charger (12 V / 30 A - 3 outputs) sometimes trips the automatic fuse of the shore supply when starting up. The fuse is 10 A , B-curve type. No other equipment than the charger is connected at that moment so the charger must be the cause of this. When the charger does not trip the fuse, it functions normally.
What could be the cause ? Is this a known issue ? Any suggestions for a solution ?

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4 Answers
vingerling avatar image

Further investigation showed an inrush current of up to 60 Amps when connecting the charger to the shore supply (230 Volts). This high current is clearly sufficient to trigger the Overcurrent protection (circuit breaker). which is a 10 Amps device in my case. I have contacted Victron for this issue, but they say it is normal behaviour for this product and that they can't do anything to prevent this from happening. I therefore now installed an inrush current limiter that brings the first current peak back to about 10 Amps. Just after the inrush (takes about 100 ms) the current limiter is switched off and the charger starts charging the batteries. Issue seems to be solved now.

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Hi.

I've installed an IP22 and having the exact same issue. As soon as shore power is connected, the circuit breaker trips. When I turn the breaker back on, it all works perfectly - it's just the initial turn on.

Would you mind giving me more info on the inrush current limiter that you fitted? I've no idea what that is or how it would be installed, but would really appreciate some pointers. It's frustrating having to reset the breaker every time I hook up a shore line.

Thanks.
Ryan

What you need is:
One wirewound Power resistor in the range of 30 Ohm (minimum) to 60 Ohm (maximum). Power rating must be 10 Watts minimum.
One relay with a turn-on time delay of about 300 ms, contacts must be capable of switching 3 Amps as a minimum. coil made for 230 Vac.

The resistor needs to be connected in series with the charger input line and the relay contact needs to be connected in parallel to the resistor. The supply for the relay is the 230 V line that was initially used to supply the charger.

The circuit now works as described below:
As soon as the shore supply is switched on, the charger is connected to the 230 V through the power resistor, limiting the inrush current to maximum 8 Amps. The inrush process will not take longer than 300 ms.
After 300 ms the relay will turn on and will short circuit the resistor. From that moment on the charger is connected directly to the 230 Volts line and will then work as intended.
The series resistor is thus only used during the inrush process to limit the currect.

If you build this small circuit, make sure you build it safely, meaning that you ensure the 230 volt connections cannot be touched . Proper insulation is very important !!
Components can be purchased from Ebay or other electronic parts suppliers.
For the relay you can best use an adjustable time delay relay.


martyn61 avatar image

Is There any plug and play solution to this problem. ????

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vingerling avatar image

Thanks Guy for your response, but actually it is confusing me.
As far as I know the fuse next to the outputs is protecting the converter output for reverse connections. This is likely to have no influence on the inrush currect. Or is there another fuse inside the converter ? Please clarify.

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Guy Stewart (Victron Community Manager) avatar image

Try replacing the fuse and see if the trip still occurs.

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