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Generator AC not accepted by RTC-Axpert 5KVA

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Check the generator voltage is within the accepted range of the inverter and check the frequency of the generator output - you will need a decent meter to do this. 

The inverter will not accept the input if it is outside the tolerances of the inverter.

 

3 hours ago, 87 Dream said:

Unfortunately, though most sub 5kW or even 7kW generators are modified Sine wave in nature as the cost involved to generate a pure sine wave increases the cost of components in the manufacturing of the said generator.

Are you sure that you are not confusing generators with inverters?  (Unless you are talking about inverter generators?)

I have never heard of modified sine-wave other than as inverter output.  A quick Google search confirms that.

2 hours ago, Daniel J du Plessis said:

the problem was that I use the RTC-Axpert 5KVA inverter as a standalone inverter and then the setting 28 has to be on SIG - it was on PAL. Everything working just fine now.

Wow. I would not have predicted that to be the problem. Certainly, all sorts of problems occur, but I didn't think that rejecting generator input that it would otherwise accept would be one of them. Thanks for the report.

Yip we live learn everyday ... I have a power quality analyser I should take some screen shots of the terrible wave a generator produces so much for AVR.

This is something I have been considering ... using an inverter as a means to clean up the generator wave form ... the axpert inverters I am testing have a clean pure sine wave. 

The catch is that the inverter is not an "online"  device like the more expensive UPS units. 

when I run the load tests .... it runs smooth ... I have only noticed glitches (spikes) on the wave form when switching loads on and off ... but compared to the grid power its no big deal. 

I dont change setting 28 to sol when I use the inverters as a stand alone unit ... so that will be a test for the near future ... I will hook up my contractors generator and run a few tests. 

 

Edited by isetech

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