HHD1 Series motor protectors monitor motor current and supply condition to help protect three-phase motors from phase failure, imbalance, overload and locked-rotor conditions. HHD1-1A suits lower current ranges with compact mounting options, while HHD1-2 covers higher current applications with independent output contacts.
Common Parameters
| Working Power Supply | AC220V, AC380V, 50Hz |
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| Protection Functions | Phase failure, three-phase imbalance, overload, locked rotor, start-up avoidance |
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| Display Mode | LED display for maximum phase current and fault memory status |
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| Display Accuracy | Class 2.0 |
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| Setting Mode | Potentiometer static quantitative setting |
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| Reset Mode | Panel reset or power-off reset |
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| Trip Level | 2, 5 to 40 continuously adjustable |
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| Contact Capacity | 3A AC380V resistive load |
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HHD1-1A
| Current Range | 1A to 5A; related ranges include 4A to 20A and 16A to 80A by suffix |
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| Contact Form | One set of NO and NC transfer contacts |
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| Dimensions | 125 × 71 × 120mm |
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| Installation Method | Panel/device mounting and DIN rail compatible |
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| Optional Functions | Grounding protection with special zero-sequence transformer; 4-20mA transmission output |
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HHD1-2
| Current Range | 20A to 100A; related ranges include 40A to 200A and 60A to 300A by suffix |
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| Contact Form | One NO contact group and one NC contact group, independent outputs |
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| Dimensions | 154 × 65 × 157mm |
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| Installation Method | Panel/device mounting |
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