Mitsubishi FR-HEL-H75K DC reactor

1. Product Overview

The FR-HEL-H75K is an external option for 400V class inverters. It is connected to the DC bus of the inverter to smooth the current flow, thereby reducing the harmonic current generated by the rectifier and protecting the inverter's internal components from power surges.

2. Technical Specifications

3. Key Advantages

• Harmonic Suppression: Effectively reduces the harmonic distortion (THDi) injected back into the power grid, helping facilities meet IEEE 519 standards.

• Power Factor Improvement: Increases the input power factor of the inverter, reducing the required KVA capacity of the transformer and cabling.

• Enhanced Equipment Life: By smoothing the DC current and limiting peak currents, it reduces the thermal stress on the DC bus capacitors and the rectifier bridge.

• Voltage Surge Protection: Provides a layer of protection against main supply voltage spikes and imbalances.

4. Product Applications

The FR-HEL-H75K is ideal for high-power industrial applications where power quality is critical:

• HVAC Systems: Large-scale fans and pumps in commercial buildings.

• Water Treatment: High-capacity centrifugal pumps.

• Manufacturing: Heavy-duty conveyors, extruders, and compressors.

• Power Grids: Facilities with sensitive electronics that require low harmonic interference.

5. Important Precautions

• Wiring: Ensure the jumper between terminals P1 and P(+) on the inverter is removed before connecting the DC reactor. Failure to do so will bypass the reactor.

• Heat Dissipation: Since the reactor generates heat (approx. 130W), ensure the installation cabinet has sufficient ventilation and maintain the specified clearance distances.

• Environment: As it is an IP00 rated device, it must be installed inside a control panel to prevent accidental contact with live parts and to protect it from dust/moisture.

• Safety: Always wait for the inverter's "Charge" lamp to turn off and verify zero voltage before performing any wiring or maintenance.

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