ETA Systems SM5505 Benutzerhandbuch

Conditioned Power Center 

20 

Section 5 - Installation 

Transformers are designed to meet a variety of requirements.  Some locations (Europe, for example) have 

standardized on a single input voltage.  In other cases customers may specify multiple input voltages to 

accommodate the variety of voltages commonly found in the United States.  The CPC series conditioner can 

accommodate either style of transformer - single voltage or multiple voltage primary. 

 

The conditioner is a "delta-wye" system. The input or primary side of the transformer accepts power from either a 

delta or wye power system at the voltages for which the transformer has been designed. Delta feeds are 

desirable because they reduce wiring and installation costs by eliminating the neutral conductor from the input 

wiring arrangement. In addition, feeding the CPC series with a higher input voltage reduces input amperage and 

further reduces installation costs by allowing the use of less expensive, smaller gauge electrical conductors and 

conduits.  Consult the tag on the input circuit breaker.  If the power conditioner you are installing has a single 

voltage primary, the site voltage must match the transformer primary voltage.  Power conditioners with multiple 

voltage primaries may be changed to accommodate a variety of site voltages. 

 

The secondary configuration of the transformer is a five wire wye requiring three phase conductors, a neutral, 

and a safety ground. 

 

Depending on the design of the isolation transformer, the 

power conditioner may accommodate different input voltages.  

The voltages are selected by changing primary taps.  If 

necessary, changes may be made to the input voltage setting 

by changing connections on the transformer primary windings 

at the locations shown in Figure F to the left.  Most voltage 

changes can be accomplished in 15 minutes or less.  Consult 

the specification sheet found in Section 10 of this manual for 

detailed information on the specific connections required to 

accommodate any of the allowable input voltages.  In the event 

that the voltage adjustment information in this manual is 

missing, input voltage configuration information is also shown 

on a data plate attached to the top of the transformer as shown 

in Figure G to the left. 

 

 

Figure F 

Figure G