GE AF-60 LP - Derating for Ambient Temperature; Derating for Low Air Pressure; Derating for Running at Low Speeds

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1.1.21 Derating for Ambient Temperature

The ambient temperature measured over 24 hours should be at least 5 °C lower than the max. ambient temperature.

If the frequency converter is operated at high ambient temperature, the continuous output current should be decreased.

The frequency converter has been designed for operation at max 50 °C ambient temperature with one motor size smaller than nominal. Continuous operation

at full load at 50 °C ambient temperature will reduce the lifetime of the frequency converter.

1.1.22 Derating for Low Air Pressure

The cooling capability of air is decreased at low air pressure.

For altitudes above 2000 m, please contact GE .

Below 1000 m altitude no de-rating is necessary but above 1000 m the ambient temperature or the maximum output current should be decreased.

Decrease the output by 1% per 100 m altitude above 1000 m or reduce the max. ambient temperature by 1 degree per 200 m

1.1.23 Derating for Running at Low Speeds

When a motor is connected to at frequency converter, it is necessary to check that the cooling of the motor is adequate.

A problem may occur at low speeds in constant torque applications. Running continuously at low speeds – below half the nominal motor speed – may require

additional air cooling. Alternatively, choose a larger motor (one size up).

Ordering No Description

KYPDACLP1 Keypad with potentiometer

RMKYPDACLP1 Remote Mounting Kit for Keypad incl. 3 m cable , IP21 rated

NEMA1ACLP1 Nema Type 1 kit for Unit Size M1

NEMA1ACLP2 Type 1 kit for Unit Size M2

NEMA1ACLP3 Type 1 kit for Unit Size M3

DEPLTACLP1 De-coupling plate kit for Unit Sizes M1 and M2

DEPLTACLP2 De-coupling plate kit for Unit Size M3

for M1 frame

RMACLP1 DIN rail mounting kit for M1 Unit Size

NEMA1ACLP4 Type 1 kit for Unit Size M4