Issue

SYTF2 should only be used with 208 VAC input feed when connected to a Symmetra RM.


Product Line

Symmetra Step-Down Transformers


Environment

SYTF2 - all serial ranges


Cause

Due to the number of turns on the windings of this transformer, he NEMA 5-15 120VAC outlets on the rear of the SYTF2 will supply 120 VAC only when 208 VAC is supplied on the input.

Please be aware that the Symmetra RM can provide different output voltage from 200 - 240VAC depending upon the settings in the PowerView. The default setting for North America is 208VAC. The SYTF2 is used to transform this voltage from 208V AC to 120V AC. If the output voltage of the Symmetra RM is changed to 240V AC , the SYTF2 will transform this to ~ 139 VAC. This may cause a sustained over voltage situation for some loads and possibly damage the loads' power supply. Do not provide a continuous AC supply to the SYTF2 with any other voltage then 208V.

The Symmetra RM's input voltage must also be 208VAC if being used with the SYTF2. Even though the Symmetra RM has the ability to output 208VAC when receiving 240VAC from Utility power, anytime the Symmetra RM is put into BYPASS Mode the UPS will not be able to condition the output power to put out 208VAC.  If the UPS has 240VAC on the input side and is put into Bypass mode, it will then pass that voltage through the UPS to the output. This will cause the SYTF2 to be receiving 240VAC and therefore it will only be able to step it down to approximately 139VAC.


Resolution

It is only recommended to use the SYTF2 along with the Symmetra RM when the Symmetra RM has both 208VAC on the input voltage (from utility) and on the output voltage (the output voltage selected through the Symmetra RM PowerView Display).

發佈於: 施耐德電機Taiwan