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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | AC Drive (VFD) |
| Series | MD60 |
| Horsepower | 2 HP |
| Output Power | 1.5 kW |
| Output Current | 8.0 A |
| Input Voltage | 230 VAC, 3-phase, 50/60 Hz |
| Input Voltage Range | Approximately 180–264 VAC |
| Filter | None (unfiltered) |
| Frame Size | A |
| Enclosure | NEMA 1 or Chassis (Open Type) |
| Carrier Frequency | Configurable (typical 2–16 kHz range) |
| Protective Features | Overvoltage, undervoltage, current limits, power dip ride-through |
4. Product Introduction
The Reliance Electric 6MDBN-8P0101 is a 2 HP MD60 Series AC drive designed for 230 VAC three-phase input. It delivers up to 8.0 A output current (1.5 kW) for controlling three-phase induction motors in industrial applications.
This compact drive is commonly used for pumps, fans, conveyors, and general-purpose machinery where simple, reliable speed control is required. It includes standard protective functions such as bus over/undervoltage detection, software and hardware current limits, and power-dip ride-through. The unit is unfiltered and available in chassis or NEMA 1 enclosure configurations.
6MDBN-8P0101
6MDBN-8P0101
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Drive will not start / no output | Input power missing, enable signal missing, or fault active | ✅ High | Measure input voltage; check enable wiring and fault code | Clear faults; verify control wiring |
| F12 HW OverCurrent fault | Output short, ground fault, or excessive load | ✅ High | Inspect motor leads and insulation | Check motor and cables; reduce load or accel time |
| Motor stalled (F6 type fault) | Acceleration too fast or mechanical overload | ✅ High | Review accel time and load | Increase accel time or reduce load |
| Overvoltage / undervoltage trip | Line voltage outside range or regeneration | ✅ High | Measure incoming voltage under load | Correct supply voltage or add braking if needed |
| No display or unresponsive | Power supply failure or internal fault | ✅ Medium | Verify 230 VAC at terminals | Replace drive if power is present but unit dead |
| Intermittent trips | Loose connections or overheating | ✅ Medium | Check terminal tightness and cooling | Clean heatsink; ensure proper ventilation |
If problems continue, record the exact fault code, motor nameplate data, and photos of the installation, then contact technical support with the serial number.
6. Frequently Asked Questions (FAQ)
Q: What is the 6MDBN-8P0101?
A: It is a Reliance Electric MD60 Series 2 HP, 230 VAC, 3-phase AC drive (VFD) with 8.0 A output current and no internal filter.
Q: What motors can it run?
A: Standard three-phase induction motors rated up to 2 HP on 230 VAC supply, within the drive’s current rating.
Q: Does this drive have an internal EMC filter?
A: No. This part number is the unfiltered version.
Q: What enclosure options are available?
A: It is typically supplied as chassis (open) or with NEMA 1 enclosure options depending on the specific unit.
Q: Is the MD60 series still in production?
A: The MD60 is a legacy Reliance Electric series. New surplus and refurbished units remain available for existing installations. For new designs, consider current Rockwell / Allen-Bradley drive families.
Q: Why is surplus stock often less expensive?
A: New Surplus units are unused OEM material that never entered service—typically excess project inventory. They are functionally new but may lack the latest factory packaging or original manufacturer warranty paperwork. Every unit is tested and carries our warranty.
Q: How do you test these drives before shipping?
A: Each unit receives visual inspection, power-up verification, parameter check, output voltage/frequency testing under light load or with a test motor, and fault simulation where applicable. Test documentation is available on request.
