Control- and safety isolating transformer
STE 400/23/24
Characteristics
General data
The control transformers of the STE series ensure safe galvanic isolation of the primary circuit from the secondary circuit. The unique BLOCK IMPEX vacuum impregnation process provides excellent protection against external influences while reducing noise levels. Installation is simple and quick thanks to the innovative push-in terminal technology.
Benefits
› Control and safety isolating transformer according to EN (IEC) 61558-2-2 and EN (IEC) 61558-2-6
› Very good inrush behavior due to reduced inrush currents
› High power density through a compact design concept
› Primary side ±5% taps for voltage adjustment
› Touch-protected connection terminals according to UVV BGV A3
| Product | Control- and safety isolating transformer |
| Order number | STE 400/23/24 |
| Series | STE |
| Power | 400 VA |
| Input | 219 V / 230 V / 241 V |
| Output | 24 V • 16.6 Aac |
| Phases | 1 |
| Frequency range | 50 Hz to 60 Hz |
| Short-Circuit Losses | 25.84 W |
| No-Load Losses | 13.4 W |
| Short-Term Power / instantaneous output | 1,440 VA |
| Short circuit voltage uk | 4.72 % |
| EN Insulation class | B (130°C) |
| UL Insulation class | class 130 |
| Duty Cycle | 100 % |
| Wire material | Copper |
| Efficiency | 91.1 % |
General
| Short circuit proof | not short-circuit proof |
| Switching group | Ii0 |
| Cooling type | AN |
Environment
| 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
| Input terminal | Push-in terminal |
| Output terminal | Push-in terminal |
| Terminal PE | Flat plug connection |
Size and Weight
| Width | 120 mm / 4.72 in |
| Height | 121 mm / 4.76 in |
| Depth | 104 mm / 4.09 in |
| Weight | 5 kg / 11.023 lbs |
| Low Voltage Directive |
EN 61558-2-2 EN 61558-2-6 |
| Approval cURus - Recognized | UL 5085-1/-2; CSA 22.2 |
Conrad Electronic SE
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