| Technical Specifications | ER 300 | ER 400 | ER 500 |
| Input Voltage (V) | 415 /- 15% | 415 +/- 15% | 415 +/- 15% |
| Frequency (Hz) | 50/60 | 50/60 | 50/60 |
| Rated Input Current (KvA) | 20.5 | 28 | 40 |
| Output Current Range (A) | 140 - 300 | 140 - 400 | 140 - 500 |
| No Load Voltage (V) | 55-68 | 60-80 | 60-80 |
| Duty Cycle (%) | 35 | 35 | 35 |
| Efficiency (%) | 75 | 75 | 75 |
| Power Factor | 0.8 | 0.8 | 0.8 |
| Insulation Class | H | H | H |
| Protection Class | IP21 | IP21 | IP21 |
| Weight (Kgs.) | 110 | 116 | 125 |
| Dimension (mm) | 640 x 440 x 750 | 680 x 580 x 920 | 680 x 580 x 920 |
| Usable Electrode - MS 6013 - (mm) | 3.2-5 | 3.2-6 | 3.2-8 |
| Product Reference | ZX6-315 | ZX6-400 | ZX6-500 |
| Product Code | JB891120 | JB891121 | JB891122 |