ABB 3AUA0000090743 Three‑Phase AC Film Power Capacitor

• Brand
  ABB
• Model
  3AUA0000090743
• Product Name
  Three‑Phase AC Film Power Capacitor
• Place of Origin
  European Union
• HS Code
  85322500
• Dimensions
  465 mm × 135 mm × 115 mm
• Weight
  5.2 kg
• Operating Temperature
  −40 °C to +70 °C
• Storage Temperature
  −40 °C to +85 °C
• Power Supply
  1000 V AC
• Warranty
  12 month
• Product Status
  New and original

ABB 3AUA0000090743 (MP9-21247K DC-Link Filter Capacitor) Characteristics

Polypropylene film capacitor module specially tailored for ABB ACS800 series inverters, adopting integrated three-phase structure with standard 3×107μF capacitance configuration.

Rated with 1000VAC alternating voltage and 1400VDC direct voltage, professionally applied to DC-link voltage smoothing and current ripple suppression for high-power frequency conversion equipment.

Features strong ripple current endurance, extremely low equivalent series resistance (ESR) and outstanding high-frequency filtering performance, effectively optimizing inverter power quality.

Adopts bolt-type busbar terminal design, which guarantees stable and reliable high-current transmission, and facilitates on-site cabinet installation, wiring and module replacement.

Equipped with fully enclosed metal housing, providing effective protection against dust contamination, external impact and mechanical damage in industrial scenarios.

Supports wide operating temperature range from -55℃ to +85℃, capable of stable operation in complex and harsh industrial cabinet environments.

Adopts compact modular structural layout, with overall dimensions of 635mm × 200mm × 122mm and a weight of about 16.65kg, saving cabinet installation space.

Possesses excellent self-healing performance, which can automatically repair minor dielectric breakdown, ensuring long-term operational stability.

Serves as a dedicated DC-link filter component for ABB high-power inverters, functioning to stabilize DC bus voltage, absorb instantaneous voltage spikes and suppress harmonic interference.

With precise capacitance tolerance and consistent electrical performance, it is suitable for long-term continuous working conditions of process industrial equipment.

ABB 3AUA0000090743 (MP9-21247K DC-Link Filter Capacitor) Common Problems and Solutions

Capacitor Over-Temperature Alarm and Surface Overheating

Root cause: Long-term operation with overrated ripple current; inadequate cabinet ventilation and heat dissipation; ambient temperature beyond the rated operating range; aging and performance deterioration of internal dielectric materials.

Action: Measure the actual circuit ripple current; improve cabinet air circulation and heat dissipation; remove dust and contaminants from the capacitor surface; ensure ambient temperature complies with factory specifications; replace the capacitor once bulging or thermal deformation is observed.

Unstable DC-Link Voltage and Obvious Load Voltage Fluctuation

Root cause: Capacitance attenuation due to component aging; loose power terminal connections; poor contact between the capacitor and busbar.

Action: Power off the system and fully discharge the DC-link circuit; test the actual capacitance value; tighten busbar and terminal fasteners; check terminals for oxidation and corrosion; replace the capacitor if its capacitance falls below the allowable tolerance.

Capacitor Bulging, Electrolyte Leakage and Burning Smell

Root cause: Continuous DC-link overvoltage stress; long-term ripple current overload; accumulated thermal fatigue aging; instantaneous impact from external short-circuit faults.

Action: Cut off power immediately and avoid repeated power-on attempts; completely replace the defective capacitor; inspect the inverter’s overvoltage protection function and verify on-site grid power quality to eliminate potential faults.

DC-Link Undervoltage Fault During Drive Startup and Operation

Root cause: Severe capacitance loss of the filter capacitor; increased internal equivalent series resistance (ESR); degraded busbar contact performance.

Action: Fully discharge the DC bus before maintenance; test capacitor capacitance and ESR parameters; inspect the operating condition of the drive pre-charge circuit; replace the filter capacitor if key parameters deviate significantly from standard values.

Intermittent Random Tripping Without Fixed Fault Codes

Root cause: Occasional internal contact failure of aged capacitors; loose busbar fixation caused by long-term equipment vibration.

Action: Check component mechanical fastening status after power shutdown; perform capacitance testing and comparative analysis; replace with a new spare capacitor if abnormal electrical parameters are detected.

Visible Physical Damage to Capacitor

Root cause: Mechanical collision and vibration damage during transportation, installation or operation; equipment cabinet dust pollution and moisture ingress causing component damage.

Action: Inspect the capacitor for cracks, deformation and surface contamination; clean and optimize the control cabinet operating environment; replace all physically damaged capacitors; avoid extrusion and bending of terminals during installation to prevent mechanical stress damage.