 |
Characteristics |
AGT series of Constant Voltage Transformers |
AIT and MIT series of Ultra Isolation Transformer |
| Smallest in catalogue |
100VA |
250VA |
| Largest single phase in catalogue |
15kVA |
10kVA |
| Largest single phase available |
30kVA |
100kVA |
| Largest three phase in catalogue |
50kVA |
250kVA |
| Largest three phase available |
50kVA |
400kVA |
| Noise rejection |
broadband for common & transient modes |
excellent common mode |
| Lightning protection |
good if installed correctly pulls input fuse to protect system against very high energy pulse |
excellent common mode noise rejection |
| Voltages available |
2 to 20 kVac |
55-0-55 to 680 Vac |
| Voltage stabilisation |
5:1 or 15:1 or better |
none |
| Output regulation |
3-5% |
<2% |
| Waveform re-shaping |
THD < 5% for any input shape |
none |
| Galvanic isolation |
yes |
yes |
| Creepage & clearance |
usually > 15 mm |
> 6 mm |
| Typical efficiency |
above 90% |
above 97% |
| Size & weight |
~15kg/kVA |
much lighter than GT series |
| Audible noise |
50 dbA for 5 kVA |
virtually none |
| MTBF |
> 200 000 hrs |
> 200 000 hrs |
| Hold up with swiched mode PS |
retained even @ low line voltage |
same as mains supply |
| Frequency |
50 or 60 Hz or both |
50/60Hz all units |
Applications |
AGT series |
AIT / MIT series |
| Networked computers |
where voltage stabilisation is required |
ideal |
| File servers |
where voltage stabilisation is required |
ideal |
| EPoS systems |
for robust protection |
ideal |
| 3 phase STAR loads |
ideal |
ideal |
| 3 phase DELTA loads |
can be done with complex filter ONLY not advised |
ideal |
| UPS up front |
ideal |
ideal |
| UPS bypass |
care with phasing |
ideal |
| UPS output voltage step up/down |
AGT requires larger UPS than nominal sizing |
ideal |
| Generators |
care with frequency stability |
ideal |
| Phase controlled loads |
care with current waveform |
ideal |
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