AC Motors When Using at an Altitude of More than 1,000 m above Sea Level

As the altitude increases, the heat radiation effect in the atmosphere decreases, requiring measures such as reducing the ambient temperature of the product.
The following are the conditions for using the equipment at altitudes exceeding 1,000 m but below 2,000 m.

• Target Products
  • KII Series
  • KIIS Series
  • World K Series
  • K Series
  • BH Series

• *Except when combined with right-angle shaft gearheads.

Operating Conditions When the Power Supply Voltage is Single-Phase

If you use the motor at an altitude exceeding 1,000 m but below 2,000 m, lower the ambient temperature as follows.

For example, if you use a product with a maximum ambient temperature limit of 40 °C at an altitude of 2,000 m, the maximum ambient temperature limit would be 32 °C.

Operating Conditions When the Power Supply Voltage is Three-Phase

If you use the motor at an altitude exceeding 1,000 m but below 2,000 m, lower the ambient temperature or decrease the load torque as follows.

Reducing the Ambient Temperature

For example, if you use a product with a maximum ambient temperature limit of 40 °C at an altitude of 2,000 m, the maximum ambient temperature limit would be 32 °C.

Reducing the Load Torque

For example, when used at 2,000 m above sea level, the upper limit value of the load torque is 80 % of the rated value.

When Using Gearheads

Use at an altitude exceeding 1,000 m but below 2,000 m.
As altitude increases, there is a possibility of decreased oil seal life and grease leakage within the gearhead due to the temperature rise caused by the difference between the ambient air pressure and the outside air pressure and decrease in heat radiation effect.

If grease leakage is a concern, regularly check for grease stains and consider installing oil catchers or similar devices on the equipment.