To help our customers understand proper connections for dual primary and/or dual secondary transformers we have prepared 4 examples (below) on a hypothetical dual primary & dual secondary transformer. The key to proper connections is the phasing information.
Series Winding Connections
(Primary)
In this example we are connecting the two primary windings in series.
- Note phasing dots on primary connection points 2 & 4.
- Jumper connection 2 & 3 (note: connection 2 has a phasing dot - connection 3 does not).
- Connect input to connection points 1 & 4.
Parallel Winding Connections
(Primary)
In this example we are connecting the two primary windings in parallel.
- Note phasing dots on primary connection points 2 & 4.
- Jumper connections 2 & 4 (note: both connections have a phasing dot).
- Jumper connections 1 & 3 (note: both connections have no phasing dots).
- Connect input to connection points 1 & 4.
Series Winding Connections
(Secondary)
In this example we are connecting the two secondary windings in series.
- Note phasing dots on secondary connection points 5 & 7.
- Jumper connection 6 & 7 (note: connection 7 has a phasing dot - connection 6 does not).
- Output from connection points 5 & 8.
Parallel Winding Connections
(Secondary)
In this example we are connecting the two secondary windings in parallel.
- Note phasing dots on secondary connection points 5 & 7.
- Jumper connections 5 & 7 (note: both connections have a phasing dot).
- Jumper connections 6 & 8 (note: both connections have no phasing dots).
- Output from connection points 5 & 8.
