Hammond Mfg. - Basic Transformer Hook Up Data

Basic Transformer Hook Up Data

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To help our customers understand proper connections for dual primary and/or dual secondary transfomers 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)

Series Primary Connection

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)

Parallel Primary Connection

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)

Series Secondary Connections

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)

Parallel Secondary Connections

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.