FAIL-SAFE transformer, control- and safety isolating transformer
FST 250/24
Characteristics
Benefits
› With integrated FAIL-SAFE protection
› High power density due to a compact construction design
› Very good switch-on behaviour thanks to reduced starting currents
› May be operated at 50 - 60 Hz
› Very good corrosion protection and low noise thanks to BLOCK IMPEX vacuum impregnation
› Primary side for input voltage 230 Vac and 400 Vac
› 100 VA and 160 VA versions for mounting with integrated DIN rail mounting in compliance with DIN 50022
| Product | FAIL-SAFE transformer, control- and safety isolating transformer |
| Order number | FST 250/24 |
| Power | 250 VA |
| Input | 230 V / 400 V |
| Output | 24 V • 10.41 Aac |
| Frequency range | 50 Hz to 60 Hz |
| Short-Circuit Losses | 17.9 W |
| No-Load Losses | 7.6 W |
| Short circuit voltage uk | 9.30 % |
| 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 |
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 | 2 |
Electrical Connections
| Terminal Pri | Screw terminal |
| Terminal Sec | 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) |
