FR-D720S-1.5K-CHT Mitsubishi Electric Variable Frequency Inverter Drive

Product Overview & Engineering Architecture

The Mitsubishi Electric FR-D720S-1.5K-CHT is a high-efficiency 1.5kW variable frequency drive built on the industry-proven FR-D700 platform. Operating on a single-phase 200V to 240V AC input, this compact drive synthesizes a precise three-phase 200V to 240V AC PWM output rated at 7.0A continuous current. It provides low-speed high-torque performance, robust dynamic braking response, and advanced motor protection tailored for industrial machine builders.

Engineered for panel builders and system integrators, the FR-D720S-1.5K-CHT unit incorporates an integrated cooling fan system to dissipate thermal loads efficiently within tight enclosure layouts. The FR-D700 control hardware reduces installation time via Spring Clamp Terminals and simplifies commissioning through an intuitive integrated digital control dial.

Technical Specifications Table

• Model Number: FR-D720S-1.5K-CHT
• Manufacturer Brand: Mitsubishi Electric
• Product Series: FR-D700 Series Variable Frequency Drive
• Supported Motor Rating: 1.5 kW (2.0 HP)
• Continuous Output Current: 7.0 A
• Overload Capacity: 150% for 60s, 200% for 0.5s (inverse-time delay curve)
• Nominal Input Voltage & Phase: Single-phase 200V AC to 240V AC (50Hz / 60Hz)
• Output Voltage & Phase: Three-phase 200V AC to 240V AC
• Apparent Power Capacity: 4.0 kVA
• Enclosure Rating: IP20 enclosed structure (JEM1030 standard compliant)
• Thermal Dissipation System: Forced air cooling system with integrated fan
• Unit Net Weight: 1.5 kg

Global PLC Spare HUB's Insight

According to Global PLC Spare HUB's Insight, the FR-D720S-1.5K-CHT drive offers an optimal power-to-footprint ratio when stepping up from 0.75kW class micro-drives. While the smaller 0.75kW units rely on passive thermal conduction, this 1.5kW FR-D700 variant utilizes forced air ventilation to maintain internal semiconductor junctions below critical thermal thresholds under continuous 7.0A loads.

In high-cycle automated sorting systems, upgrading to the FR-D720S-1.5K-CHT inverter eliminates motor stall events during high peak load changes. Field data demonstrates that its 200% short-term overload threshold effectively absorbs transient torque spikes during heavy mechanical startups without causing nuisance overcurrent trips.

Target Machinery & Field Applications

• Heavy-Duty Belt Conveyors: Delivers smooth acceleration curves and consistent low-speed torque for loaded material transit.
• Industrial Exhaust & HVAC Fans: Regulates airflow via energy-efficient motor speed manipulation while mitigating inline harmonic feedback.
• Automated Processing Mixers: Maintains steady shaft RPM despite viscosity shifts in fluid or compound agitator tanks.
• Commercial Machine Tools: Controls small lathe spindles and milling drive motors with stable speed regulation.
• Positive Displacement Pumps: Provides precise volumetric flow regulation and protects against dry-run mechanical overloads.

Diagnostic Systems & Troubleshooting Codes

The integrated diagnostic module in the FR-D720S-1.5K-CHT drive monitors real-time operating variables and provides diagnostic fault tracking via its digital interface. When system thresholds are exceeded, the inverter safely shuts down power stages and logs specific trip conditions.

• E.FAN: Alerts technicians to cooling fan speed drop or hardware lockup, preventing power module damage.
• E.BE: Detects internal braking transistor alarm or external discharge resistor wiring faults during regenerative deceleration.
• E.ILF: Identifies input phase loss or significant line voltage imbalance on incoming single-phase power lines.
• E.OLT: Signals stall prevention limit activation when driven load torque exceeds programmed current limits.

Logistics, Shipping & Warranty

• Global Express Delivery: Shipped worldwide via trusted carriers including FedEx, UPS, and DHL.
• Dispatch Lead Time: Expedited order dispatch guaranteed within 24 to 48 hours.
• 12-Month Warranty: Includes full 12-month coverage against hardware and manufacturing defects.

Frequently Asked Questions (FAQ)

Q1: What is the main structural difference between the 1.5kW FR-D720S-1.5K-CHT and smaller 0.75kW models?

A1: The FR-D720S-1.5K-CHT model incorporates an internal forced-air cooling fan to manage higher thermal output from its 7.0A output rating, whereas 0.75kW models utilize passive self-cooling heatsinks.

Q2: Can I mount multiple FR-D720S-1.5K-CHT units side-by-side in a control panel?

A2: Yes, side-by-side installation is supported up to an ambient temperature of 40°C. Ensure at least 10cm vertical clearance above and below the FR-D700 heatsinks to maintain airflow.

Q3: What parameter must be modified if the cooling fan generates excessive ambient noise during idle periods?

A3: Adjust Parameter 244 (Cooling fan operation selection). Setting Pr. 244 to '0' causes the fan to operate only when the inverter is running or when heatsink temperature is elevated.

Q4: How do I resolve an E.FAN diagnostic fault on an operational unit?

A4: Check for debris blocking the fan blades, inspect the cooling fan plug connection, or replace the plug-in cooling fan cassette if the unit has exceeded its rated operational lifespan.

Q5: How do I select between the 1.5kW FR-D720S single-phase input drive and a standard three-phase input VFD?

A5: Select the FR-D720S-1.5K-CHT model when operating in facilities without three-phase utility lines available. For installations with existing three-phase 200V line power, select the equivalent three-phase input FR-D720-1.5K series drive to balance input phase currents.

Tags