Summation transformers are used for combination of several synchronous alternating currents (AC) in the same phase.

| Burden | Class | Ratio | Article number |
|---|---|---|---|
| 10-15-20VA | 0,5 - 1 - 3 | 5+5/5A | 4D2001 |
| 10-15-20VA | 0,5 - 1 - 3 | 5+5+5/5A | 4D2002 |
| 5VA | 0,2S | 5+5/5A | 4D2003 |
| 5VA | 1 | 1+1+1/5A | 4D2010 |
This product is designed to be safe under the following conditions:


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