The HHT4 Series is a three-phase power regulator for SCR phase-angle control of 380VAC three-phase heating and lamp loads. It accepts analog control signals and provides status display, protection and alarm output for power-control panels.
Common Parameters
| Control mode | 4-20mA, 0-5V or 0-10V optional input |
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| Output mode | Phase-angle output, phase shift range 0-150° |
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| Load voltage | Three-phase 380VAC, three-phase three-wire |
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| Protection function | Fast fuse |
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| Alarm function | Phase failure and overtemperature alarm with relay output, 1A/250VAC |
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| Dielectric withstand voltage | ≥2000VAC |
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| Display function | LED panel displays SCR output percentage and working status |
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| Installation | Bolt installation |
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| Applicable loads | Fixed impedance heating wire, IR far infrared lamp, UV lamp and similar resistive loads |
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HHT4-4/38 25P
| Load current | 25A |
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| Dimensions | 150×130×175mm |
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| Cooling method | Natural cooling |
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HHT4-4/38 40P
| Load current | 40A |
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| Dimensions | 150×130×175mm |
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| Cooling method | Forced air cooling |
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HHT4-4/38 75P
| Load current | 75A, 100A |
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| Dimensions | 218×130×175mm |
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| Cooling method | Forced air cooling |
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HHT4-4/38 125P
| Load current | 125A, 150A, 200A |
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| Dimensions | 285×148×210mm |
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| Cooling method | Forced air cooling |
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