SURTD3000XLT + AP9626 in United States

[BillP]

Hey! Thank you for checking this out.

I just got my hands on a second-hand SURTD3000XLT. I want to use this in my server rack in my home. 

My electrical panel allows me to use two (120v) rails in order to get 240v (probably 248v since I'm measuring 124v per rail with no load attached). 

I saw that the SURTD3000XLT is usually paired with a Step-Down transformer (specifically the AP9626) so I purchased one separately. 

Before I invest more money in purchasing batteries for the SURTD3000XLT, I'd like to hear from others who might have implemented the same stack in their environment. The NEMA L6-30P plug/receptacle has only 3 prongs (2x hot, 1x ground) - I'm assuming that Neutral is not required for the operation of this UPS. The UPS itself seems to be able to take anything from 180v to 280v.

I'd like to understand whether the output of the SURTD3000XLT will always be 208v (or can be configured to that output no matter the input), because from reading the manual of the AP9626, the input range for it is 185v to 230v. My fear is that since the SURTD3000XLT will be powered from 240v (or 248v), the output of the UPS will be too high for the AP9626.

Please help me understand whether my fear is founded or not.

Thank you very much,

IonutZ

[chefash_apc]

lonutZ,

The SURTD3000 will work fine for servers in a house.  You are right that input of 208 or 240volt wont matter and L630 is good for upto 250volt  As for output you have 2 options:

1 - Take your 240volt input from your house.  Change the Setting through the Netcard on the UPS to output 208volt and use the simple dumb AP9626 for 120volt loads.  BUT then the bypass wont work as you will be letting 240volt pass through to transformer.  The SURT is NOT a transformer or voltage changer during bypass mode.  The AP9626 will step it down but only to 150volt.

2 - BETTER.  Run your servers and everything at 240volt. Take 240volt power in and output 240volt.  Buy a high voltage PDU (AP7541) and buy PDU C13/C14 server cables to connect your equipment.  Avoid the transformer and legacy 120volt cables. 

[BillP]

I think number 2 is a great suggestion. I looked at my devices and seems that all the critical ones will take 110-240v so that's great 🙂 I thought about this in the beginning but went too far down the rabbit hole with the AP9626 unfortunately, thanks for bringing me back.

[BillP · Accepted solution]

Hi John,

The SURTD3000XLT is configurable to 208 VAC or 240 VAC. If it is being supplied to 208 input, then it should be configured to 208 and same if 240:240. You will need to install the PowerChute Business Edition to access it's interface via the Serial connection to change the voltage settings. Or having a Network Management Card.

Even though that it can handle 160 to 280 VAC, it does not mean that it will not react. Once it goes way beyond it nominal voltage of 208/240, it will switch over to battery.

Should you need a 120VAC output, you will need a step-down transformer. But the AP9626 is just applicable for 208 VAC and cannot work with 240VAC. You better off using the SURT003 as this is a Step-Down / Isolation Transformer. You can select if it should work with 208 or 240.

Hope this helps.