KDA 3.3-100-3-A0I-U1
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MPN: R911268063
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The Bosch Rexroth Indramat KDA 3.3-100-3-A0I-U1 is part of the KDA Spindle Drives series and is air-cooled with a weight of approximately 15 kg. It operates on a 3-phase 380–480 V AC input, has a rated current of 100 A, and features an RS232/RS485 communication interface. The unit is IP20 protected.
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Product Description:
The Bosch Indramat KDA 3.3-100-3-A0I-U1 Spindle Drive is manufactured to operate with a DC link voltage of 300 volts. It can handle a rated current of 100 amps while providing a continuous output capacity of 70 amps. The control circuitry consumes 1.4 amps from the +24V auxiliary supply. In addition, the measuring section draws 160 milliamps from the ±15V circuit during normal duty.
The KDA 3.3-100-3-A0I-U1 Spindle Drive itself has a mass of about 17.1 kilograms. When installed with the M1-KD mounting arrangement, an additional 1.7 kilograms is included. The external cooling assembly contributes a further 4.2 kilograms. The assembled unit reaches approximately 23 kilograms in total. Installation is required in a vertical orientation. It is done by following the defined mounting and drilling specifications in the product manual. A clearance distance of at least 80 millimeters between each drive module is necessary for reliable operation. The thermal regulation of the KDA 3.3-100-3-A0I-U1 Spindle Drive is achieved with a forced-air arrangement using a blower attached to the heatsink. The cooling device delivers a peak airflow of 32 liters per second. The air velocity across the fins reaches between 3 and 4 meters per second. The heat generated within the unit averages 200 watts during standard duty cycles. The external dissipation may rise to 400 watts under maximum demand.
The environmental conditions of KDA 3.3-100-3-A0I-U1 Spindle Drive for the operation range from +5 °C to +45 °C. The unit can function up to +55 °C with reduced performance levels in industrial automation. The storage conditions extend from -30 °C to +85 °C. The drive is rated for installations at elevations up to 1000 meters above mean sea level. The permissible humidity must remain below 70 percent with no condensation present. Protection is defined as IP10 in accordance with DIN 40 050 standards.
Frequently Asked Questions about KDA 3.3-100-3-A0I-U1:
Q: How does the forced-air cooling system protect the KDA 3.3-100-3-A0I-U1?
A: The attached blower provides 32 L/s of airflow to remove waste heat from the power semiconductors. This maintains junction temperatures within safe operating limits during the 200W average power dissipation.
Q: Why must the KDA 3.3-100-3-A0I-U1 be installed in a vertical orientation?
A: Vertical mounting is mandated to ensure convective airflow assists the forced-air cooling over the heatsink fins. An incorrect orientation will create hot spots and lead to premature thermal shutdown.
Q: What does the IP10 protection rating mean for KDA 3.3-100-3-A0I-U1 integration?
A: The IP10 rating indicates protection against large solids but no protection against water. This necessitates installation in a sealed electrical cabinet to protect against conductive dust and coolant ingress.
Q: How does the 1000-meter altitude rating affect the KDA 3.3-100-3-A0I-U1's performance?
A: At higher altitudes, thinner air reduces the cooling system's effectiveness, potentially requiring derating. The 1000-meter rating is the maximum elevation for operating at full specified performance without adjustment.
Q: What causes the KDA 3.3-100-3-A0I-U1's heat dissipation to reach 400 watts?
A: The dissipation peaks at 400W during maximum demand due to I²R losses in the IGBTs and diodes. This heat must be effectively expelled by the cooling system to prevent damage.
