Re: [AFMUG] Eltek Valere J series -48 or +48

[Adam Moffett]

Does Eltek have anything comparable to this:
http://www.ict-power.com/products/modular-power-series/

700W 1+1, battery management, 4 remotely controllable circuit breakers, 
and it's in one rack unit.
I'm looking at getting something like 40-50 of these for an upcoming 
build.  I had previously been talking to Alpha Technologies, but their 
solution was occupying a lot of space in a fairly small cabinet.  I like 
that this one was one and done and within budget.


If Eltek has something comparable I'd consider it.

-Adam


On 11/27/2018 11:28 AM, Chuck McCown wrote:

Yes, will get back to you.
*From:* Gino A. Villarini
*Sent:* Tuesday, November 27, 2018 2:31 AM
*To:* AnimalFarm Microwave Users Group
*Subject:* Re: [AFMUG] Eltek Valere J series -48 or +48

Chuck, can you quote:

EltekRectiverter Power Core 6 KVA 1ph ?

*GinoVillarini
*Founder/President
@gvillarini
t: 787.273.4143
m:
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www.aeronetpr.com <http://www.aeronetpr.com>| Metro Office Park #18 
Suite 304 Guaynabo, PR 00968


*From: *AF  on behalf of Chuck McCown 


*Reply-To: *AnimalFarm Microwave Users Group 
*Date: *Monday, November 26, 2018 at 6:59 PM
*To: *AnimalFarm Microwave Users Group 
*Subject: *Re: [AFMUG] Eltek Valere J series -48 or +48

I am an Eltek dealer.  Low volume but I can probably get you a decent 
price.


*From:*TJ Trout

*Sent:*Monday, November 26, 2018 3:40 PM

*To:*AnimalFarm Microwave Users Group

*Subject:*[AFMUG] Eltek Valere J series -48 or +48

I'm looking at the Valere series and I can't seem determine if it's 
+48 or -48, seems like it's +48 but I thought all the telecom stuff 
was positive ground.


How do you go about powering negative ground loads from a positive 
ground power source?


I'm assuming you can leave out the neutral and isolate the chassis?



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Re: [AFMUG] Eltek Valere J series -48 or +48

[Chuck McCown]

Yes, will get back to you.  

From: Gino A. Villarini 
Sent: Tuesday, November 27, 2018 2:31 AM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

Chuck, can you quote:

 

Eltek Rectiverter Power Core 6 KVA 1ph ? 

 

Gino Villarini 
Founder/President
@gvillarini
t: 787.273.4143 
m: 
 
www.aeronetpr.com | Metro Office Park #18 Suite 304 Guaynabo, PR 00968

From: AF  on behalf of Chuck McCown 
Reply-To: AnimalFarm Microwave Users Group 
Date: Monday, November 26, 2018 at 6:59 PM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

 

I am an Eltek dealer.  Low volume but I can probably get you a decent price.  

 

From: TJ Trout 

Sent: Monday, November 26, 2018 3:40 PM

To: AnimalFarm Microwave Users Group 

Subject: [AFMUG] Eltek Valere J series -48 or +48

 

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground. 

 

How do you go about powering negative ground loads from a positive ground power 
source?

 

I'm assuming you can leave out the neutral and isolate the chassis? 

 

 




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Re: [AFMUG] Eltek Valere J series -48 or +48

[Carl Peterson]

Our J series are isolated from the chassis unless you bond ground to the
positive ground on it.  That being said, the fuses are on the - side so you
would want to take the main outputs to your own distribution panel or bus
with the fuses on the + leg if you were going to run it at +48



On Tue, Nov 27, 2018 at 1:13 AM TJ Trout  wrote:

> I get it now, the 48v never changes just the ground reference.
>
> I'm guessing the reason no one uses negative ground loads on a -48 system
> is the chassis ground being bonded to the inputs return.
>
> Could I therically isolate my eltek -48 from any ground and operate it as
> a negative ground system?
>
> Or if the chassis isn't bonded to either can I just avoid grounding the
> supply?
>
> On Mon, Nov 26, 2018, 10:29 PM TJ Trout 
>> Chuck,
>>
>> Are you sure the eltek's don't have the chassis ground bonded to the
>> positive output ?
>>
>> So I'm assuming the complication here is that if you reverse the wires,
>> when you try to power a +48v device, and it's negative input is bonded to
>> chassis ground and you have a ground path between the two (like a metal
>> rack) or possibly somehow through the AC ground/neutral you cause a direct
>> short circuit?
>>
>> I see mentions of DC-DC converters, but I don't see the point of using a
>> 300w RSD converter with a 2000W rectifier shelf?
>>
>>
>>
>> On Mon, Nov 26, 2018 at 2:57 PM  wrote:
>>
>>> It is 48.  Period.  You choose the reference if you want one.
>>>
>>> If you tie the + terminal to chassis ground then the – terminal is the
>>> hot –48 VDC terminal.
>>>
>>> If you tie the – terminal to chassis ground then the + terminal is the
>>> hot +48 VDC terminal.
>>>
>>> If you don’t tie either to chassis ground, then you will have to have a
>>> common return bar that is on the opposite rail from your fuses and circuit
>>> breakers.
>>>
>>> *From:* TJ Trout
>>> *Sent:* Monday, November 26, 2018 3:40 PM
>>> *To:* AnimalFarm Microwave Users Group
>>> *Subject:* [AFMUG] Eltek Valere J series -48 or +48
>>>
>>> I'm looking at the Valere series and I can't seem determine if it's +48
>>> or -48, seems like it's +48 but I thought all the telecom stuff was
>>> positive ground.
>>>
>>> How do you go about powering negative ground loads from a positive
>>> ground power source?
>>>
>>> I'm assuming you can leave out the neutral and isolate the chassis?
>>>
>>>
>>>
>>> --
>>> --
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>>> AF@af.afmug.com
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Re: [AFMUG] Eltek Valere J series -48 or +48

[Josh Baird]

If you only need 300W of +48VDC load, it makes perfect sense.

On Tue, Nov 27, 2018 at 1:31 AM TJ Trout  wrote:

> Chuck,
>
> Are you sure the eltek's don't have the chassis ground bonded to the
> positive output ?
>
> So I'm assuming the complication here is that if you reverse the wires,
> when you try to power a +48v device, and it's negative input is bonded to
> chassis ground and you have a ground path between the two (like a metal
> rack) or possibly somehow through the AC ground/neutral you cause a direct
> short circuit?
>
> I see mentions of DC-DC converters, but I don't see the point of using a
> 300w RSD converter with a 2000W rectifier shelf?
>
>
>
> On Mon, Nov 26, 2018 at 2:57 PM  wrote:
>
>> It is 48.  Period.  You choose the reference if you want one.
>>
>> If you tie the + terminal to chassis ground then the – terminal is the
>> hot –48 VDC terminal.
>>
>> If you tie the – terminal to chassis ground then the + terminal is the
>> hot +48 VDC terminal.
>>
>> If you don’t tie either to chassis ground, then you will have to have a
>> common return bar that is on the opposite rail from your fuses and circuit
>> breakers.
>>
>> *From:* TJ Trout
>> *Sent:* Monday, November 26, 2018 3:40 PM
>> *To:* AnimalFarm Microwave Users Group
>> *Subject:* [AFMUG] Eltek Valere J series -48 or +48
>>
>> I'm looking at the Valere series and I can't seem determine if it's +48
>> or -48, seems like it's +48 but I thought all the telecom stuff was
>> positive ground.
>>
>> How do you go about powering negative ground loads from a positive ground
>> power source?
>>
>> I'm assuming you can leave out the neutral and isolate the chassis?
>>
>>
>>
>> --
>> --
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>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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Re: [AFMUG] Eltek Valere J series -48 or +48

[Gino A. Villarini]

Chuck, can you quote:

Eltek Rectiverter Power Core 6 KVA 1ph ?


Gino Villarini
Founder/President
@gvillarini
t: 787.273.4143
m:
[https://image.ibb.co/ctQ7jU/aeronet-logo.png]<http://www.aeronetpr.com/>   
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<https://www.instagram.com/aeronetpr/?hl=en>   
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<https://www.linkedin.com/company/aeronet-broadband-corp> 
[https://image.ibb.co/dqqq4U/tw-logo.png] 
<https://twitter.com/AeroNetPR?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Eauthor>
[https://image.ibb.co/bAJcjU/yt-logo.png] 
<https://www.youtube.com/channel/UCr2Q9WBrAYVm3Fn970Jd6VA>
www.aeronetpr.com<http://www.aeronetpr.com> | Metro Office Park #18 Suite 304 
Guaynabo, PR 00968
From: AF  on behalf of Chuck McCown 
Reply-To: AnimalFarm Microwave Users Group 
Date: Monday, November 26, 2018 at 6:59 PM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

I am an Eltek dealer.  Low volume but I can probably get you a decent price.

From: TJ Trout
Sent: Monday, November 26, 2018 3:40 PM
To: AnimalFarm Microwave Users Group
Subject: [AFMUG] Eltek Valere J series -48 or +48

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground.

How do you go about powering negative ground loads from a positive ground power 
source?

I'm assuming you can leave out the neutral and isolate the chassis?



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Re: [AFMUG] Eltek Valere J series -48 or +48

[Gino A. Villarini]

Its -48


Gino Villarini
Founder/President
@gvillarini
t: 787.273.4143
m:
[https://image.ibb.co/ctQ7jU/aeronet-logo.png]   
[https://image.ibb.co/noQeyp/inc500.png]   
[https://image.ibb.co/e4pBB9/fb-logo.png]  
[https://image.ibb.co/nxuuW9/insta-logo.png] 
   
[https://image.ibb.co/jhSEW9/in-logo.png] 
 
[https://image.ibb.co/dqqq4U/tw-logo.png] 

[https://image.ibb.co/bAJcjU/yt-logo.png] 

www.aeronetpr.com | Metro Office Park #18 Suite 304 
Guaynabo, PR 00968
From: AF  on behalf of TJ Trout 
Reply-To: AnimalFarm Microwave Users Group 
Date: Monday, November 26, 2018 at 6:42 PM
To: AnimalFarm Microwave Users Group 
Subject: [AFMUG] Eltek Valere J series -48 or +48

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground.

How do you go about powering negative ground loads from a positive ground power 
source?

I'm assuming you can leave out the neutral and isolate the chassis?


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Re: [AFMUG] Eltek Valere J series -48 or +48

[TJ Trout]

I get it now, the 48v never changes just the ground reference.

I'm guessing the reason no one uses negative ground loads on a -48 system
is the chassis ground being bonded to the inputs return.

Could I therically isolate my eltek -48 from any ground and operate it as a
negative ground system?

Or if the chassis isn't bonded to either can I just avoid grounding the
supply?

On Mon, Nov 26, 2018, 10:29 PM TJ Trout  Chuck,
>
> Are you sure the eltek's don't have the chassis ground bonded to the
> positive output ?
>
> So I'm assuming the complication here is that if you reverse the wires,
> when you try to power a +48v device, and it's negative input is bonded to
> chassis ground and you have a ground path between the two (like a metal
> rack) or possibly somehow through the AC ground/neutral you cause a direct
> short circuit?
>
> I see mentions of DC-DC converters, but I don't see the point of using a
> 300w RSD converter with a 2000W rectifier shelf?
>
>
>
> On Mon, Nov 26, 2018 at 2:57 PM  wrote:
>
>> It is 48.  Period.  You choose the reference if you want one.
>>
>> If you tie the + terminal to chassis ground then the – terminal is the
>> hot –48 VDC terminal.
>>
>> If you tie the – terminal to chassis ground then the + terminal is the
>> hot +48 VDC terminal.
>>
>> If you don’t tie either to chassis ground, then you will have to have a
>> common return bar that is on the opposite rail from your fuses and circuit
>> breakers.
>>
>> *From:* TJ Trout
>> *Sent:* Monday, November 26, 2018 3:40 PM
>> *To:* AnimalFarm Microwave Users Group
>> *Subject:* [AFMUG] Eltek Valere J series -48 or +48
>>
>> I'm looking at the Valere series and I can't seem determine if it's +48
>> or -48, seems like it's +48 but I thought all the telecom stuff was
>> positive ground.
>>
>> How do you go about powering negative ground loads from a positive ground
>> power source?
>>
>> I'm assuming you can leave out the neutral and isolate the chassis?
>>
>>
>>
>> --
>> --
>> AF mailing list
>> AF@af.afmug.com
>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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>> AF@af.afmug.com
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>>
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Re: [AFMUG] Eltek Valere J series -48 or +48

[TJ Trout]

Chuck,

Are you sure the eltek's don't have the chassis ground bonded to the
positive output ?

So I'm assuming the complication here is that if you reverse the wires,
when you try to power a +48v device, and it's negative input is bonded to
chassis ground and you have a ground path between the two (like a metal
rack) or possibly somehow through the AC ground/neutral you cause a direct
short circuit?

I see mentions of DC-DC converters, but I don't see the point of using a
300w RSD converter with a 2000W rectifier shelf?



On Mon, Nov 26, 2018 at 2:57 PM  wrote:

> It is 48.  Period.  You choose the reference if you want one.
>
> If you tie the + terminal to chassis ground then the – terminal is the hot
> –48 VDC terminal.
>
> If you tie the – terminal to chassis ground then the + terminal is the hot
> +48 VDC terminal.
>
> If you don’t tie either to chassis ground, then you will have to have a
> common return bar that is on the opposite rail from your fuses and circuit
> breakers.
>
> *From:* TJ Trout
> *Sent:* Monday, November 26, 2018 3:40 PM
> *To:* AnimalFarm Microwave Users Group
> *Subject:* [AFMUG] Eltek Valere J series -48 or +48
>
> I'm looking at the Valere series and I can't seem determine if it's +48 or
> -48, seems like it's +48 but I thought all the telecom stuff was positive
> ground.
>
> How do you go about powering negative ground loads from a positive ground
> power source?
>
> I'm assuming you can leave out the neutral and isolate the chassis?
>
>
>
> --
> --
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> AF@af.afmug.com
> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
> --
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Re: [AFMUG] Eltek Valere J series -48 or +48

[SmarterBroadband]

Not sure that is true with the J series?

 

From: AF [mailto:af-boun...@af.afmug.com] On Behalf Of ch...@wbmfg.com
Sent: Monday, November 26, 2018 2:56 PM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

 

It is 48.  Period.  You choose the reference if you want one.  

 

If you tie the + terminal to chassis ground then the – terminal is the hot –48 
VDC terminal.

 

If you tie the – terminal to chassis ground then the + terminal is the hot +48 
VDC terminal.

 

If you don’t tie either to chassis ground, then you will have to have a common 
return bar that is on the opposite rail from your fuses and circuit breakers.  

 

From: TJ Trout 

Sent: Monday, November 26, 2018 3:40 PM

To: AnimalFarm Microwave Users Group 

Subject: [AFMUG] Eltek Valere J series -48 or +48

 

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground. 

 

How do you go about powering negative ground loads from a positive ground power 
source?

 

I'm assuming you can leave out the neutral and isolate the chassis? 

 

 

  _  

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Re: [AFMUG] Eltek Valere J series -48 or +48

[chuck]

You are probably right.  I have the question into the factory about the MX 
series.  I don’t recall the output terminals indicating they were referenced.  

From: Ken Hohhof 
Sent: Monday, November 26, 2018 5:06 PM
To: 'AnimalFarm Microwave Users Group' 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

I don’t know about J series, but their Micropack series is -48V.  I seem to 
remember because of the control circuitry.

 

From: AF  On Behalf Of ch...@wbmfg.com
Sent: Monday, November 26, 2018 4:56 PM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

 

It is 48.  Period.  You choose the reference if you want one.  

 

If you tie the + terminal to chassis ground then the – terminal is the hot –48 
VDC terminal.

 

If you tie the – terminal to chassis ground then the + terminal is the hot +48 
VDC terminal.

 

If you don’t tie either to chassis ground, then you will have to have a common 
return bar that is on the opposite rail from your fuses and circuit breakers.  

 

From: TJ Trout 

Sent: Monday, November 26, 2018 3:40 PM

To: AnimalFarm Microwave Users Group 

Subject: [AFMUG] Eltek Valere J series -48 or +48

 

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground. 

 

How do you go about powering negative ground loads from a positive ground power 
source?

 

I'm assuming you can leave out the neutral and isolate the chassis? 

 

 




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Re: [AFMUG] Eltek Valere J series -48 or +48

[Ken Hohhof]

I don’t know about J series, but their Micropack series is -48V.  I seem to 
remember because of the control circuitry.

 

From: AF  On Behalf Of ch...@wbmfg.com
Sent: Monday, November 26, 2018 4:56 PM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] Eltek Valere J series -48 or +48

 

It is 48.  Period.  You choose the reference if you want one.  

 

If you tie the + terminal to chassis ground then the – terminal is the hot –48 
VDC terminal.

 

If you tie the – terminal to chassis ground then the + terminal is the hot +48 
VDC terminal.

 

If you don’t tie either to chassis ground, then you will have to have a common 
return bar that is on the opposite rail from your fuses and circuit breakers.  

 

From: TJ Trout 

Sent: Monday, November 26, 2018 3:40 PM

To: AnimalFarm Microwave Users Group 

Subject: [AFMUG] Eltek Valere J series -48 or +48

 

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground. 

 

How do you go about powering negative ground loads from a positive ground power 
source?

 

I'm assuming you can leave out the neutral and isolate the chassis? 

 

 

  _  

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Re: [AFMUG] Eltek Valere J series -48 or +48

[Josh Baird]

It's -48VDC.  You'll need an isolated DC-DC converter (eg, Meanwell RSD) if
you need to power +48VDC loads.

On Mon, Nov 26, 2018 at 5:41 PM TJ Trout  wrote:

> I'm looking at the Valere series and I can't seem determine if it's +48 or
> -48, seems like it's +48 but I thought all the telecom stuff was positive
> ground.
>
> How do you go about powering negative ground loads from a positive ground
> power source?
>
> I'm assuming you can leave out the neutral and isolate the chassis?
>
>
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Re: [AFMUG] Eltek Valere J series -48 or +48

[chuck]

It is 48.  Period.  You choose the reference if you want one.  

If you tie the + terminal to chassis ground then the – terminal is the hot –48 
VDC terminal.

If you tie the – terminal to chassis ground then the + terminal is the hot +48 
VDC terminal.

If you don’t tie either to chassis ground, then you will have to have a common 
return bar that is on the opposite rail from your fuses and circuit breakers.  

From: TJ Trout 
Sent: Monday, November 26, 2018 3:40 PM
To: AnimalFarm Microwave Users Group 
Subject: [AFMUG] Eltek Valere J series -48 or +48

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground. 

How do you go about powering negative ground loads from a positive ground power 
source?

I'm assuming you can leave out the neutral and isolate the chassis? 





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Re: [AFMUG] Eltek Valere J series -48 or +48

[chuck]

I am an Eltek dealer.  Low volume but I can probably get you a decent price.  

From: TJ Trout 
Sent: Monday, November 26, 2018 3:40 PM
To: AnimalFarm Microwave Users Group 
Subject: [AFMUG] Eltek Valere J series -48 or +48

I'm looking at the Valere series and I can't seem determine if it's +48 or -48, 
seems like it's +48 but I thought all the telecom stuff was positive ground. 

How do you go about powering negative ground loads from a positive ground power 
source?

I'm assuming you can leave out the neutral and isolate the chassis? 





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