Mitsubishi Electric FR-A820-18.5K FREQROL-A800 VFD Inverter

SKU FR-A820-18.5K

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12-month warranty
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Manufacturer: Mitsubishi Electric
Product No.: FR-A820-18.5K
Country of origin:United States
Product Type: Variable Frequency Drives
Payment: T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

Description

Designed for heavy-duty industrial motor control, the Mitsubishi Electric FR-A820-18.5K delivers precise speed and torque regulation across high-demand automation architectures. Operating on a three-phase input, this high-performance variable frequency drive features advanced vector control algorithms to optimize motor efficiency and system reliability. Designed for integration into demanding environments, its robust electrical design accommodates voltage fluctuations and handles high load dynamics, making it an essential component for critical machinery and process control systems.

Features

Real sensorless vector control and perfect closed-loop vector control capability.
Robust tolerance to line voltage fluctuations, maintaining stable output under varying grid conditions.
Excellent low-speed torque performance for demanding startup conditions.
Integrated diagnostic and safety features to minimize operational downtime.
Compact IP20 enclosure designed for space-saving panel installation.

Applications

Heavy-duty conveyors and material handling systems requiring high starting torque.
Industrial fans, blowers, and positive displacement pumps.
Extruders, mixers, and centrifuges in chemical and plastics processing.
Metalworking machinery, cranes, and hoisting equipment.

Technical Specifications

Manufacturer	Mitsubishi Electric
Model Number	FR-A820-18.5K
Series	FREQROL-A800
Product Type	Variable Frequency Drive (VFD) Inverter
Rated Input Voltage	Three-phase 200 to 240 VAC
Rated Input Frequency	50 Hz / 60 Hz
Permissible AC Voltage Fluctuation	170 to 264 VAC
Permissible Frequency Fluctuation	+/- 5%
Enclosure Rating	IP20
Shipping Weight	16.5 kg

Empirical Engineering Insights

Alternative Models & Compatibility

This unit serves as a functional upgrade path for legacy FR-A720-18.5K models. While physical dimensions and mounting holes are highly compatible, terminal configurations and control logic terminal layouts should be cross-referenced. Parameter sets can be migrated efficiently using FR Configurator2 software via the USB port.

Application Pitfalls & Engineering Notes

In enclosed control cabinets, this IP20 unit dissipates considerable thermal energy under full 18.5 kW load. Ensure cabinet cooling fans are sized to handle the drive’s heat loss. To protect the inverter's input rectifier stage, an input AC reactor must be installed if the main power transformer capacity is 500 kVA or more, or if thyristor loads are on the same line.

Commissioning & Wiring Tips

Always use symmetric shielded motor cables grounded at both ends to reduce electromagnetic interference (EMI) and protect motor bearings from capacitive shaft currents. Ensure that the control circuit wiring is routed completely separate from the main circuit power lines to prevent induced signal noise.

Installation Guidelines

CRITICAL WARNING:

Hazard of electrical shock. Ensure all incoming AC mains power is completely isolated and locked out before starting installation. Wait at least 10 minutes after disconnecting power for the internal DC bus capacitors to discharge. Always measure the voltage between terminals P/+ and N/- with a reliable voltmeter to ensure it is below 45 VDC before touching connections.

1

Mount the inverter vertically on a flat, non-combustible surface to ensure proper upward airflow through the cooling heatsink.

2

Connect three-phase AC input power strictly to terminals R/L1, S/L2, and T/L3. Connecting power to output terminals U, V, and W will cause permanent damage to the unit.

3

Verify that the inverter ground terminal is connected to an independent earth ground with low resistance to conform to local safety standards.

FAQ

What is the primary upgrade path for older FR-A720 series inverters to this model?

This model directly replaces the FR-A720-18.5K. Control parameters can be transferred using FR Configurator2 software, though physical terminal layouts should be verified for safety.

What is the required discharge wait time before servicing this VFD?

Due to high-capacity capacitors in the intermediate DC link, you must wait at least 10 minutes after disconnecting AC input power and verify zero voltage across P/+ and N/- before servicing.

How should the shielding and grounding be configured to avoid EMI issues?

Use symmetric shielded motor cables grounded at both the inverter gland plate and the motor terminal box. Keep control and power cables separated by at least 30 cm.

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Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

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Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

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