FAIL-SAFE transformer, control- and safety isolating transformer
FST 250/24 - Discontinued items - no longer available
Characteristics
General data
The control transformers of the FST series feature an integrated FAIL-SAFE protection device and 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.
Benefits
› Control and safety isolating transformer according to EN (IEC) 61558-2-2 and EN (IEC) 61558-2-6
› High power density through a compact design concept
› Very good inrush behavior due to reduced inrush currents
› Operation possible at 50 - 60 Hz
› Primary side for input voltage 230 Vac and 400 Vac
| Product | FAIL-SAFE transformer, control- and safety isolating transformer |
| Order number | FST 250/24 |
| Series | FST |
| Power | 250 VA |
| Input | 230 V / 400 V |
| Output | 24 V • 10.41 Aac |
| Phases | 1 |
| Frequency range | 50 Hz to 60 Hz |
| Short-Circuit Losses | 17.9 W |
| No-Load Losses | 7.6 W |
| Short circuit voltage uk | 9.3 % |
| EN Insulation class | B (130°C) |
| Duty Cycle | 100 % |
| Wire material | Copper |
| Efficiency | 90.7 % |
General
| Short circuit proof | conditionally 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 | 2 |
Electrical Connections
| Input terminal | Screw terminal |
| Output terminal | Screw terminal |
| Terminal PE | Flat plug connection |
Size and Weight
| Width | 105 mm / 4.13 in |
| Height | 112 mm / 4.41 in |
| Depth | 106 mm / 4.17 in |
| Weight | 4.3 kg / 9.48 lbs |
| Low Voltage Directive |
EN 61558-2-2 EN 61558-2-6 |
| VDE Approval |
VDE 0570-2-x (DIN EN 61558-2-x) |
