Danfoss VLT Training Manual page 19

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VLT Installation

3) Pre-Installation Checks

The VLT takes all size information in kilowatts (kW), so horsepower (Hp) must be

converted to kW. The formula is 1 Hp = ¾ of a kW. The chart above shows the

equivalent. A 100Hp drive must be programmed for 75kW in the drive.

Each drive size can be programmed to accommodate 4 sizes smaller and one size

larger. On the larger size – do not exceed the maximum current rating of the drive.

A 75kW (100Hp) drive can be used to properly operate a 30kW (40Hp) motor. This

same 75kW drive might also be used on a 90kW (125Hp) if the current rating is

within limits.

The chart above shows all the settings that may be encountered at the Motor size

parameter, number 102. This parameter is discussed in more detail in the next

module. For more information see your Instruction Manual.

Rev.02

Hp to kW Chart

• Record motor HP in kW; 1 Hp = 0.75kW

• Hp has been rounded off in table; Only kW appears in

the VLT & some kW setting are unique to certain drives.

• Using Parameter 102, each VLT can be under sized by 4

and over sized by 1, but always check current limits.

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