Control- and safety isolating transformer
ST 320/23/24
Characteristics
Benefits
› Very good switch-on behaviour thanks to reduced starting currents
› High power density due to a compact construction design
› Primary side ±5 % tappings for voltage adjustment
› Very good corrosion protection and low noise thanks to BLOCK IMPEX vacuum impregnation
› Contact protected screw connection terminals complying with UVV BGV A3
› Simple mounting thanks to robust metal footplate with oval slots
| Product | Control- and safety isolating transformer |
| Order number | ST 320/23/24 |
| Power | 320 VA |
| UL Derating | 250.00 VA |
| Input | 219 V / 230 V / 241 V |
| Output | 24 V • 13.3 Aac |
| Frequency range | 50 Hz to 60 Hz |
| Short-Circuit Losses | 22.6 W |
| No-Load Losses | 12.3 W |
| Short-Term Power / instantaneous output | 810 VA |
| Short circuit voltage uk | 6.40 % |
| EN insulation class | B (130°C) |
| UL Insulation class | class 105 |
| Duty Cycle | 100 % |
| Wire material | Copper |
| Efficiency | 90.2 % |
General
| Short circuit proof | not short-circuit proof |
| Switching group | Ii0 |
| Cooling type | AN |
Enviroment
| Ambient temperature | -20 °C to 40 °C / -4 °F to 104 °F |
| Max. installation height | 2,000 m / 6,562 ft |
Protection and safety
| Protection type | IP 00 |
| Protection class (prepared) | I |
| Overvoltage category | III |
| Degree of contamination | 1 |
Electrical Connections
| Terminal Pri | Screw terminal |
| Terminal Sec | Screw terminal |
| Terminal PE | Flat plug connection |
Size and Weight
| Width | 192 mm / 7.56 in |
| Height | 180 mm / 7.09 in |
| Depth | 183 mm / 7.2 in |
| Weight | 4.5 kg / 9.92 lbs |
| Low Voltage Directive |
EN 61558-2-2 EN 61558-2-6 |
| Approval cURus - Recognized | UL 5085-1/-2; CSA 22.2 |
