Mitsubishi Electric FR-D740-5.5K-CHT FR-D700 Series Variable Frequency Drive

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Pengilang: Mitsubishi Electric
No. Produk: FR-D740-5.5K-CHT
Negara asal:Amerika Syarikat
Jenis Produk: Variable Frequency Drives
Pembayaran: T/T, Western Union
Berat: 3300g
Pelabuhan penghantaran: Xiamen
Jaminan: 12 bulan

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Description

Engineered for precise motor control in demanding industrial environments, the Mitsubishi Electric FR-D740-5.5K-CHT regulates three-phase AC motors with high thermal and electrical efficiency. This micro-drive delivers a continuous 12.0 A output current and handles a rated capacity of 9.1 kVA, making it highly suitable for machine tools, conveyor belts, and process pumps. Built with an integrated digital dial and a robust cooling structure, it provides outstanding torque control and integrated safety options in a compact space-saving layout.

Features

Magnetic Flux Vector Control: Achieves reliable startup torque and smooth acceleration even under varying load conditions.
Integrated Digital Dial: Allows for rapid parameter adjustments, setpoint changes, and immediate local control.
Modbus RTU Communication: Embedded RS-485 port facilitates seamless communication with PLCs, HMIs, and distributed control architectures.
Enhanced Safety Integrity: Built-in safe torque off (STO) safety inputs comply with international machine safety guidelines.
Spring Clamp Control Terminals: High-vibration wiring terminals ensure continuous electrical contact without periodic retightening.

Applications

Heavy-duty material handling conveyor lines and sorting systems.
Industrial fan ventilation systems and centrifugal pump flow regulation.
Woodworking machinery, packaging machines, and localized auxiliary automation panels.

Technical Specifications

Manufacturer	Mitsubishi Electric
Model Number	FR-D740-5.5K-CHT
Series Name	FR-D700 Series (FR-D740 micro-drive class)
Voltage Class	Three-phase 400V Class
Rated Input Voltage	380 to 480 VAC (+10% / -15%), 50/60 Hz
Applicable Motor Output	5.5 kW (approx. 7.5 HP)
Rated Capacity	9.1 kVA
Rated Output Current	12.0 A
Overload Current Rating	150% of rated current for 60 seconds (inverse-time characteristics)
Cooling System	Forced air cooling (with cooling fan)
Protective Design	IP20 enclosed type
Net Weight	3.3 kg
Shipping Weight (Calculated)	5.5 kg

Connections and Interfaces

Terminal/Connector	Function / Circuit Assignment
R/L1, S/L2, T/L3	Main AC power input connections (three-phase AC power supply)
U, V, W	Three-phase AC output connections to the motor
P/+, PR	Brake resistor connection terminals (external dynamic braking module)
STF, STR	Forward start and Reverse start digital control commands
SD, PC	Control circuit common and external 24 VDC power supply terminal
RJ-45 Port	RS-485 physical serial port for Modbus RTU interface configuration

Empirical Engineering Insights

Alternative Models & Compatibility

When transitioning from an older FR-S540 or FR-E540 series drive, physical dimensions vary slightly. Check mounting hole patterns as they may require retrofit plates. Additionally, parameters cannot be directly transferred from older software; use the FR Configurator software to align digital input functions, especially when working with remote start commands mapping parameter Pr. 79.

Application Pitfalls & Engineering Notes

Under heavy load or high cycling, inadequate ventilation inside electrical cabinets may lead to premature E.THT (Inverter Overload) trip events. Ensure the cabinet ambient temperature does not exceed 50 degC. When running long motor cable distances (exceeding 30 meters), high-frequency stray capacitance increases. We highly recommend installing an output AC reactor on the U/V/W terminals to mitigate line reflection and protect motor insulation from dv/dt wear.

Commissioning & Wiring Tips

To configure control wiring for sinking (NPN) or sourcing (PNP) logic, locate the physical slide switch hidden under the dynamic panel/display board cover. Ensure this switch is pushed to the correct position matching your master controller outputs before powering on. Shielded control lines must be separated from primary power lines by at least 10 cm, running in orthogonal intersections to avoid inductions and signal noise.

Installation Guidelines

CRITICAL WARNING: Verify that the main AC power input supply is disconnected and locked out. Allow at least 10 minutes after disconnecting power for internal DC bus capacitors to discharge. Confirm that the voltage across terminals P/+ and N/- is below 45 VDC using a certified digital multimeter before touching any terminals.

Mount the inverter vertically to a rigid metal sub-panel using four M4 mounting bolts, maintaining a minimum clearances of 50 mm on both top and bottom edges for adequate heat dissipation.

Connect the primary ground terminal to the system PE plate, and wire the three-phase power lines directly to terminals R/L1, S/L2, and T/L3. Connect motor phases to U, V, and W.

Run low-voltage control lines for emergency stops and digital commands using high-density shielded twisted-pair cables. Ground the shield at the drive terminal block only.

Reinstall terminal shields and front safety panel, switch on AC power, and set parameter Pr. 80 (Motor Capacity) and Pr. 9 (Electronic Thermal Overload Relay) based on the motor's nameplate rating.

Key Features:

What is the primary cause of an E.THT trip on this specific Mitsubishi drive?

An E.THT fault indicates inverter overload, commonly triggered by sustained high torque demands, mechanical blockages on the motor shaft, or running at low speeds with insufficient cooling under constant torque.

Which parameter controls the operation mode (external, PU, or network command)?

Parameter 79 (Operation Mode Selection) defines how the drive receives start and speed commands. Setting it to 0 allows dynamic switching, while setting 1 restricts control to the physical PU panel.

Is the cooling fan on the FR-D740-5.5K-CHT field-replaceable?

Yes, the integrated forced cooling fan can be replaced quickly from the top section of the drive unit without dismantling the entire structural housing or disconnecting any power terminal wiring.

Penghantaran Ekspres Global

Penghantaran Standard: 4-6 Hari Perniagaan melalui DHL, FedEx, dan UPS.
Penghantaran Ekspres: Penghantaran pada hari yang sama untuk pesanan dalam stok yang dibuat sebelum 2:00 PM (GMT+8).
Liputan Seluruh Dunia: Berkhidmat di lebih 150 negara, termasuk penghantaran pantas ke Arab Saudi dan UAE.

Pemulangan & Jaminan

Jaminan 30 Hari: Pemulangan diterima untuk produk dalam stok dalam pembungkusan asal yang disegel kilang.
Jaminan 12 Bulan: Setiap komponen industri disokong oleh jaminan teknikal profesional kami.

Pesanan diproses dan dihantar Isnin-Jumaat (tidak termasuk cuti umum).

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TECHNICAL SPECIFICATIONS

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Mitsubishi Electric FR-D740-5.5K-CHT FR-D700 Series Variable Frequency Drive