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I am facing VARS Problem In Cat C15 Diesel Generator

Gents
I have one new cat C15 Diesel Generator, Sr No. LXJ03375, With EMCP 4.2, AVR EM10
Here I am facing problem at starting time the generator is running normal on 22% load but it's tripping some time after 20 minutes and some time after 1-2 hrs
1st warning Revers reactivpower
2nd shutdown on VARS
Please suggest me to fix this problem also I have ET Tools
Thanks and Regard
Mohammad Aurangzeb
Super Contributor

Re: I am facing VARS Problem In Cat C15 Diesel Generator

First question, is unit paralleled to another unit of the grid?

 

What is the power factor when this is happening?

 

What kind of loads is the generator supplying?

 

MikeL.

New member

Re: I am facing VARS Problem In Cat C15 Diesel Generator

The Generator is running individual there is no any other power source except my generator
And the generator output supply is connected to VFD Motor feeder
I have below mention current parameter
Voltage L-L 416
Ampear 131 average
Freq 50Hz
Pf 0.92
Total Kw 85
Total Kva 86
Total Kvar -10
Super Contributor

Re: I am facing VARS Problem In Cat C15 Diesel Generator

If you are not running paralleled, or ever will ,then it should be ok to disable the reverse VAR protection.  Your VFD likely has power factor correction on the input, and under low load conditions is causing a leading power factor. As long as the load is low and the leading power factor is not causing the voltage to rise, then there should be no problem.

 

Make sure you save the original settings before you make the changes so if you do ever parallel you can restore those settings.

 

Just because a protection element exists in the controller doesn't mean it has to be enabled.

 

Hope that helps, MikeL.

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New member

Re: I am facing VARS Problem In Cat C15 Diesel Generator

Yesterday 1600 clock I was increased the Reverse reactivpower % and threshold delay time after that it's running normal from last 16 Hrs

Anyways thank you so much for your support
Thanks & regards
Mohammad
New member

Re: I am facing VARS Problem In Cat C15 Diesel Generator

Actually I am also suffering from the same problem. Looking for urget solution.

New member

Re: I am facing VARS Problem In Cat C15 Diesel Generator

If the generator is running individual without any parallel or synchronizing system then try to adjust the Reverse reactivpower limit it's % or disable that relay
New member

Re: I am facing VARS Problem In Cat C15 Diesel Generator

how to disable reverse vars protection on emcp 4.2
New member

Re: I am facing VARS Problem In Cat C15 Diesel Generator

I also experience the above problems, please indicate how to increase or disable the reverse reactivity power function.