Mitsubishi M80 AC Reactor DH-AL-55K

DH-AL-55K is a Mitsubishi Electric AC reactor (line reactor) used in CNC servo and spindle drive power systems.

Description

• Manufacturer: Mitsubishi Electric
• Series: DH-AL series (400V class CNC systems)
• Model: DH-AL-55K
• Type: AC Line Reactor (input reactor)
• Rated Capacity: 55 kW class

Purpose / Function

DH-AL-55K is a passive inductive component installed on the AC input side of CNC power supply units (like MDS-EH / MDS-DH CV series).

It is used to:

• Reduce harmonic distortion generated by the converter
• Limit inrush current during power ON
• Protect rectifier circuits inside the power supply
• Improve power factor and stabilize the electrical supply
• Reduce electrical stress on upstream power systems

Compatible Power Supply Units

From Mitsubishi CNC specifications, DH-AL-55K is matched with:

• MDS-EH-CV-550
• MDS-DH-CV-550

Electrical Ratings (typical)

• Rated current: ~198 A
• Voltage class: 380–480 VAC, 3-phase
• Frequency: 50/60 Hz
• Installed in series with the AC input line of the CNC power supply

System Position

AC mains → DH-AL-55K reactor → MDS-EH / DH CV power supply → DC bus → servo/spindle drives