YVF3 Series (H355–450) Variable Frequency Three-Phase Asynchronous Motor

The YVF3 Series H355–450 is a large-frame variable frequency three-phase asynchronous motor designed for industrial equipment that requires adjustable-speed operation through a frequency converter. The series covers 132–900 kW, frame sizes H355–450 and 4 to 12 poles, with a published frequency range of 25–100 Hz.

It is suitable for driving machinery used in petroleum, chemical processing, metallurgy, cement, paper making and other industrial sectors. Available configurations include 380 V or customized voltage, Class F insulation, IP54 or IP55 protection, cast-iron frames, and foot or flange mounting.

YVF3 Series Motor Model, Power, Voltage and Frequency Range

The following table lists the published YVF3 motor models together with output power, voltage, current, rated torque, constant-torque frequency range and constant-power frequency range. Blank cells are retained exactly as provided in the original technical data.

Technical Data of YVF3 Series (H355–450) Variable-Frequency Three-Phase Asynchronous Motors

Key Product Features

• Variable-frequency operation: 25–100 Hz operating range for projects using frequency-converter control.
• Large-frame industrial coverage: H355–450 frame sizes with 132–900 kW output range.
• Multiple pole options: 4, 6, 8, 10 and 12 poles for different driven-equipment speed requirements.
• Industrial enclosure options: IP54 or IP55 protection with Class F insulation.
• Flexible electrical configuration: 380 V as listed, with customized voltage available for project requirements.
• Installation flexibility: foot mounting or flange mounting, with terminal-box positions available on the top, right or left side.
• Cast-iron frame: suitable for large industrial motor construction and demanding equipment installations.

Typical Industrial Applications

The YVF3 Series is intended for variable-speed drive requirements in large industrial machinery. Typical sectors include petroleum, chemical processing, metallurgy, cement production and paper making. Final motor selection should be based on the actual load, required speed range, converter configuration, installation method and site conditions.

Operating Conditions

The published operating conditions specify an ambient temperature range of -15 to +40°C and an installation altitude not exceeding 1,000 m. Where site temperature, altitude, electrical supply or load conditions fall outside these values, the final motor configuration should be confirmed before ordering.

What to Confirm Before Ordering

For a large variable-frequency motor, output power alone is not enough to release an order. To reduce specification errors, provide the manufacturer with the following information:

• required output power and frame size
• rated voltage and site frequency
• required pole count and operating speed range
• frequency converter details and intended frequency range
• driven equipment and load characteristics
• mounting arrangement, such as IMB3 or IMB35
• shaft and coupling requirements
• terminal-box position
• IP protection requirement
• ambient temperature, altitude and site environment
• quantity and destination market

For replacement projects, also send the existing motor nameplate, installation drawing and key dimensions. For OEM or project orders, confirm the approved drawing and electrical specification before production.

Why This Series Fits Large Variable-Speed Industrial Drives

The YVF3 H355–450 series combines a large 132–900 kW output range with 4–12 pole options and a 25–100 Hz published frequency range. That makes it relevant to industrial projects where the driven machine requires speed adjustment rather than fixed-speed operation.

For buyers, the practical selection point is not simply whether a motor is “VFD compatible.” The proposed motor should be matched to the converter, load profile, operating speed range, mounting dimensions and site conditions. This is especially important for large-frame motors, where a specification mismatch can affect installation, coupling, commissioning and project cost.

Frequently Asked Questions

What is the output range of the YVF3 H355–450 series?

The uploaded specification lists an output range of 132–900 kW with frame sizes from H355 to H450.

What frequency range is available?

The published frequency range is 25–100 Hz. The final operating range should still be confirmed against the converter, load and selected motor model.

Can the voltage be customized?

Yes. The uploaded specification lists 380 V as the standard reference and indicates that customized voltage is available.

Which mounting arrangements are available?

The product information lists foot and flange mounting. The supplied dimensional drawing includes IMB3 and IMB35 arrangements for H355–450 frames.

What information is needed for a quotation?

Provide output power, voltage, pole count, expected speed or frequency range, converter information, mounting arrangement, driven equipment, quantity and destination. For replacements, include the current nameplate and installation dimensions.

Mounting and Overall Dimensions (H355–450)

The YVF3 H355–450 series supports foot-mounted and flange-mounted configurations. The uploaded installation drawing identifies IMB3 and IMB35 arrangements. Dimensions below are in millimetres and should be checked against the selected frame and final project drawing before production.

IMB3 Mounting Dimensions

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IMB35 Mounting Dimensions

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