The separation blocks MSTU permit connection of electricity meters to the equipment without
a necessity to disconnect voltage bridges between the voltage and current circuits of tested meters.
Properties
- The MST-U bock is a passive separation transformer with identical balanced secondary windings;
- The secondary windings are realized in order to suppress voltage differences among them;
- The MST-U unit operates without external supply;
- Simple assembly for new and old types of test equipments;
- Design execution suppresses parasite mutual inductive linkage between individual secondary windings to maximum extend.
Technical data
| Input voltage U1 | 230 V ± 20% (110, 220 V ± 20%, optional) |
|---|---|
| Frequency range | 45 ... 65 Hz |
| Maximal amplitude deviation among secondary voltages |
0,1% |
| Maximal power/position | 10 VA (17 VA) |
| Maximal deviation UTi а U1 (between secondary and primary windings) |
1% |
| Maximal phase deviation | 0,03° |
| Insulation strength UTi/U1 (between secondary and primary windings) |
4 kV |
| Insulation strength among secondary windings | 2,1 kV |
| Protection | against short circuit |