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Products => Test Equipment => Topic started by: BillyO on April 28, 2023, 02:31:08 am

Title: SPD3303X-E
Post by: BillyO on April 28, 2023, 02:31:08 am
There does not seem to be a general thread on these power supplies, so I thought I'd start one with a generic enough title to serve as such.

That said, I do have a question.

I know you can series the two main supplies in this unit to get 64V.  My question is, can you then manually series the auxiliary supply to get a total of 69V @ 3.2A?
Title: Re: SPD3303X-E
Post by: modoran on April 28, 2023, 07:44:31 am
No, the 3rd channel is not galvanically isolated, it is derived from the 2nd channel.
Title: Re: SPD3303X-E
Post by: Performa01 on April 28, 2023, 08:50:10 am
Quote from: modoran on April 28, 2023, 07:44:31 am
No, the 3rd channel is not galvanically isolated, it is derived from the 2nd channel.
You seem to confuse this with Rigol or something.

On the Siglent SPD3303X/X-E, all three power sources are independent and galvanically isolated.

So the final answer is: yes, we can!
Title: Re: SPD3303X-E
Post by: tautech on April 28, 2023, 10:12:42 am
And with a fresh reply from Siglent this picture is proof, admittedly it is a SPD3303C with wired series connections however it clearly shows the 3rd channel with a 5V setting used in the series chain.
Title: Re: SPD3303X-E
Post by: alm on April 28, 2023, 10:45:26 am
Quote from: Performa01 on April 28, 2023, 08:50:10 am
You seem to confuse this with Rigol or something.

On the Siglent SPD3303X/X-E, all three power sources are independent and galvanically isolated.
Indeed, Rigol has a fully adjustable third channel that's not isolated from channel 2, while Siglent has an extremely limited third channel that's fully isolated.
Title: Re: SPD3303X-E
Post by: tautech on April 28, 2023, 10:53:10 am
Quote from: alm on April 28, 2023, 10:45:26 am
Quote from: Performa01 on April 28, 2023, 08:50:10 am
You seem to confuse this with Rigol or something.

On the Siglent SPD3303X/X-E, all three power sources are independent and galvanically isolated.
Indeed, Rigol has a fully adjustable third channel that's not isolated from channel 2, while Siglent has an extremely limited third channel that's fully isolated.
Yet, multiple SPD3000X/X-E models can be series'ed together to a max of 500V above mains ground.

Done it myself to 120VDC after confirmation from Siglent it is an design feature and accepted practice.
Title: Re: SPD3303X-E
Post by: daisizhou on April 28, 2023, 12:52:22 pm
https://youtube.com/shorts/0mKmwa-MJRo?feature=share
Do you know how to adjust my SPD3303D?Especially the voltage of CH1 channel
Title: Re: SPD3303X-E
Post by: BillyO on April 28, 2023, 03:46:44 pm
I'm sold.  Just put in my order.  :-+
Title: Re: SPD3303X-E
Post by: BillyO on May 01, 2023, 02:53:39 pm
Look what just came in the door, like, 5 minutes ago:


Title: Re: SPD3303X-E
Post by: BillyO on May 01, 2023, 03:14:31 pm
And now a few minutes later ...
Title: Re: SPD3303X-E
Post by: BillyO on May 01, 2023, 04:12:50 pm
Hmmm,

Is there a way to get EasyPower to remember your device?

I guess not.  A bit annoying.