Question 1

What is the price of FR-F840-3.7K-1 in Bangladesh?

Accepted Answer

Contact SISL for the best price on FR-F840-3.7K-1 in Bangladesh. As an authorized Mitsubishi distributor, we offer competitive pricing with 12-month warranty. WhatsApp: +8801329721616 for instant quote.

Question 2

What is the rated output current of FR-F840-3.7K-1?

Accepted Answer

The FR-F840-3.7K-1 has a rated output current of 8.3A. This VFD is designed for 3.7kW motor applications with three phase input.

Question 3

What size VFD do I need for a 3.7kW motor?

Accepted Answer

For a 3.7kW motor, the FR-F840-3.7K-1 is the recommended VFD. It provides 8.3A output current with proper safety margin. Always match VFD rating to motor nameplate current for optimal performance.

Question 4

What voltage does FR-F840-3.7K-1 support?

Accepted Answer

The FR-F840-3.7K-1 operates on 380-480V AC input voltage. It's part of the Mitsubishi FR-F800 series, suitable for three phase power supply systems.

Question 5

What is the output frequency range of FR-F840-3.7K-1?

Accepted Answer

The FR-F840-3.7K-1 provides an output frequency range of 0-500 Hz. This wide frequency range allows precise motor speed control for various industrial applications.

Question 6

Does FR-F840-3.7K-1 come with warranty?

Accepted Answer

Yes, all Mitsubishi VFDs from SISL come with 12-month warranty. As an authorized distributor in Bangladesh since 2009, we provide genuine products with full after-sales support and technical assistance.

Question 7

Is FR-F840-3.7K-1 original Mitsubishi product?

Accepted Answer

Yes, SISL is an authorized Mitsubishi Electric distributor in Bangladesh. All our VFDs including FR-F840-3.7K-1 are 100% original Japan products with proper documentation and warranty.

Question 8

How much energy can I save with FR-F840-3.7K-1?

Accepted Answer

VFDs typically save 20-50% energy in pump and fan applications. The FR-F840-3.7K-1 features optimal excitation control and energy-saving algorithms that automatically reduce power consumption during light load conditions.

Question 9

Why is FR-F800 optimized for fans and pumps?

Accepted Answer

The FR-F800 series features adaptive PID control and energy-optimization algorithms specifically designed for variable torque loads like fans and pumps. It can achieve energy savings of up to 50% compared to fixed-speed operation.

Question 10

What is adaptive PID control in FR-F800?

Accepted Answer

Adaptive PID control in FR-F800 automatically adjusts PID parameters based on system response, providing stable pressure or flow control without manual tuning. This is ideal for water supply and HVAC applications.

Question 11

Is VFD and inverter the same thing?

Accepted Answer

Yes, VFD (Variable Frequency Drive) and inverter are the same thing. Other names include variable speed drive (VSD), AC drive, adjustable frequency drive (AFD), and frequency converter. All refer to devices that control motor speed by varying frequency.

Question 12

Which is better: VFD or soft starter?

Accepted Answer

VFD provides continuous speed control and energy savings, while soft starter only reduces starting current. For applications requiring variable speed or energy efficiency (pumps, fans), VFD is better. For fixed-speed applications with occasional starts, soft starter may be more economical.

Question 13

How to select VFD size for motor?

Accepted Answer

Match VFD rated current to motor full-load current (FLA) with 10-20% safety margin. For 3.7kW motor, FR-F840-3.7K-1 with 8.3A output is recommended. Always verify motor nameplate and application requirements.

Name	Last Update	Language
Mitsubishi Electric - Factory Automation (FA) - FR-F800 Series - Catalog.pdf	13 Jan 2023	English (US)
Mitsubishi Electric - FR-F800 Inverters Brochure.pdf	03 Aug 2022	English (US)

Picture	Compatible SKU	Add to Quote	Description
	FR-D740-3.7K		VFD Inverter - 3.7kW - 8.1A - Mitsubishi Electric - Three Phase
	FR-D840-3.7K-081-60		VFD Inverter - 3.7kW - 8.1A - Mitsubishi Electric - Three Phase
	FR-E840-3.7K-1		VFD Inverter - 3.7kW - 9.5A - Mitsubishi Electric - Three Phase
	FR-D740-5.5K		VFD Inverter - 5.5kW - 12A - Mitsubishi Electric - Three Phase
	FR-D840-5.5K-120-60		VFD Inverter - 5.5kW - 12A - Mitsubishi Electric - Three Phase
	FR-E840-5.5K-1		VFD Inverter - 5.5kW - 12A - Mitsubishi Electric - Three Phase
	FR-E840-0120-5-60		VFD Inverter - 5.5kW - 12A - Mitsubishi Electric - Three Phase

FR-F840-3.7K-1

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