Variable transformer
ESS 305
Characteristics
Benefits
› Stepless adjustment of the AC voltage from zero to the maximum value
› Self-cleaning of the exposed contact tracks
› 4-point flange mounting
› Rotary knobs and scales optionally available
| Product | Variable transformer |
| Order number | ESS 305 |
| Power | 1,150 VA |
| Phases | 1 |
| Frequency range | 50 Hz to 60 Hz |
| EN insulation class | B (130°C) |
| Duty Cycle | 100 % |
| Wire material | Copper |
General
| Short circuit proof | not short-circuit proof |
| Switching group | Ia0 |
| Cooling type | AN |
Environment
| Ambient temperature | -20 °C to 45 °C / -4 °F to 113 °F |
| Max. installation height | 2,000 m / 6,562 ft |
Protection and Safety
| Protection type | IP 00 |
| Protection class (prepared) | I |
| Degree of contamination | 1 |
Electrical Connections
| Input terminal | Screw terminal |
| Output terminal | Screw terminal |
Size and Weight
| Width | 135 mm / 5.31 in |
| Height | 147 mm / 5.79 in |
| Depth | 159 mm / 6.26 in |
| Weight | 5.18 kg / 11.42 lbs |
