Description
In installations with 3rd harmonic generation loads, the current through the neutral cable can be higher than the one in the phases, even in case of balanced loads. The most proper solution for these problems is to use a specific equipment for the 3rd harmonic filtering, consisting basically in a three-phase isolating transformer, delta-star connected, that completely eliminates the 3rd harmonic current, plus a passive filter which reduces the 5th harmonic.
| Technical characteristics | |
| Isolating transformer | |
| 3×400 V | Rated voltage of the primary |
| 3×230 V | Rated voltage of the secondary |
| 50 Hz | Frequency |
| Delta | Primary connection |
| Star | Secondary connection |
| Copper | Wiring |
| Protections | |
| 6A bipolar circuit breaker | Control circuit |
| Three-phase earth leakage switch (30mA to 300mA) | Power circuit |
| -10/+40ºC | Climatic range |
| IP42 | Protection |
| Weight (kg) | Dimensions (mm) | Un (V) | Power (kVA) | Part Number | ||
| H | A | L | ||||
| 125 | 800 | 500 | 590 | 3X400/230 | 10 | TFA-40010 |
| 160 | 800 | 500 | 590 | 3X400/230 | 15 | TFA-40015 |
| 185 | 800 | 500 | 590 | 3X400/230 | 20 | TFA-40020 |
| 265 | 1050 | 750 | 900 | 3X400/230 | 30 | TFA-40030 |
| 325 | 1050 | 750 | 900 | 3X400/230 | 40 | TFA-40040 |
| 350 | 1050 | 750 | 900 | 3X400/230 | 50 | TFA-40050 |
| 420 | 1050 | 750 | 900 | 3X400/230 | 80 | TFA-40080 |
| 470 | 1050 | 750 | 900 | 3X400/230 | 100 | TFA-40100 |