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性能特点:
高效率、高可靠性、高焊接质量 High efficiency,high secure,high quality welding performance 电弧稳定飞溅小 Stabilized electric arc and little splash 独特的引弧电路和推力电路，使各种焊条引弧变得轻而易举 Special ARC starting circut and thrust circuit make various sticks starting easy 推力电流可无级调节，更适合多种条件下的焊接 Anywhere you weld thrust current can be regulated in step less 过热、过压、欠压、过流等各种保护电路使焊机更可靠 Protecting circuit for over-heat,over-voltage,owing-voltage,over-current etc make the machine more reliable技术参数：
| 型号 Model | 300MX | 400MX | 500MX |
| 输入电压 Input voltage | 三相AC380V | 三相AC380V | 三相AC380V |
| 额定输入容量 Rated input power | 12KVA | 18KVA | 25KVA |
| 负载持续率 Rated duty cycle | 60% | 60% | 60% |
| 电流调节范围 Range of output current | 20-300A | 20-400A | 20-500A |
| 额定输出电流 Rated output current | 300A | 400A | 500A |
| 额定空载电压 Rated no load voltage | 70V | 70V | 70V |
| 重量 Net weight | 39kg | 46kg | 50kg |
| 外型尺寸 External dimensions | 315*665*570 | 315*665*570 | 315*665*570 |
| 品牌 | 航天恒正 | 型号 | ZX7-400MX |
| 产品别名 | 直流电焊机 | 额定电流 | 400（A） |
| 电源电压 | 380（V） | 电流 | 直流 |
| 作用原理 | 逆变 |
