KDF3.3-150-300-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDF3.3-150-300-W1 is part of the KDF Variable Frequency Drives series and features a rated current of 150 Amps with a DC bus voltage of 300 V DC. This drive uses forced cooling, has a protection category of IP10, and weighs 17.4 kilograms. It supports a maximum ambient temperature of 55 degrees Celsius and an installation altitude up to 1000 meters.
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Product Description:
The KDF3.3-150-300-W1 is a variable-frequency drive produced by Bosch Rexroth Indramat within the KDF Variable Frequency Drives series. It converts a fixed DC link into a controlled three-phase output so induction or synchronous motors can be speed-regulated in automated lines, test stands, and material-handling systems. This operating principle allows the drive to support controlled acceleration, steady running speed, and responsive deceleration in equipment with changing load demands. Because the inverter output is adjustable, the same machine can run different motor speeds without mechanical changes to the drive train.
This unit delivers a rated output of 150 A and can supply a continuous motor phase current of 90 A for steady-state loads. Its DC bus is maintained at 300 V DC, while the control electronics draw only 1.6 A from the +24 V auxiliary supply and 160 mA from the ±15 V rails, minimizing auxiliary power demand inside the cabinet. Forced cooling is provided by an integral blower that is energized from the plant’s single-phase mains at 220 V AC. This airflow keeps semiconductor junction temperatures stable under full current. The drive carries a humidity classification of F, so it tolerates high relative humidity without condensation during normal duty. A protection rating of IP10 indicates that live parts are guarded against accidental finger contact, but the enclosure must be mounted in a closed electrical cabinet.
The mechanical package weighs 17.4 kg, and the separate blower module adds 4.2 kg, while an installation kit contributes another 1.7 kg to panel load calculations. The separate weight values also help when sizing mounting hardware and confirming cabinet load distribution. Heat is extracted through a forced-air path, so ambient temperature around the heat sink may rise to 55 °C without derating, provided airflow is unobstructed. Operation is specified up to 1000 m above sea level, beyond which cooling efficiency drops and current limits should be reduced. Clearance around the airflow path should remain open so heated air can leave the drive without restriction.
Frequently Asked Questions about KDF3.3-150-300-W1:
Q: What is the rated current capacity of the KDF3.3-150-300-W1 drive?
A: The KDF3.3-150-300-W1 variable frequency drive has a rated current of 150 A for standard operations.
Q: What DC bus voltage does the KDF3.3-150-300-W1 support?
A: This model operates with a DC bus voltage of 300 V DC, ensuring stable drive performance.
Q: What cooling method is used in the KDF3.3-150-300-W1 drive?
A: The KDF3.3-150-300-W1 utilizes forced cooling to maintain optimal operating temperature.
Q: What is the maximum ambient temperature for the KDF3.3-150-300-W1?
A: The drive can operate in ambient temperatures up to 55°C.
Q: What is the maximum installation altitude for the KDF3.3-150-300-W1 drive?
A: This drive is designed for installation at altitudes up to 1000 meters.
