Description
Otis Board GDA26800KA2 Brief Introduction
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Product Name |
Otis Inverter |
| Model Number |
KDA21310ABG5/OVFR03B-403 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Otis Inverter KDA21310ABG5 – High-Performance Vector Control for Modern Elevator Drives | Nanjing Zhuye Elevator Parts
Inside every high-speed Otis elevator, motion is controlled by software—but the power is delivered by hardware. The KDA21310ABG5 inverter is that hardware. Rated at 31 kW continuous (55 kW peak), this vector-control drive converts 400 V DC bus energy into silky, variable-frequency power, driving permanent-magnet or induction motors up to 6 m/s while regenerating power back to the grid. When it hesitates, rides become jerky, levelling drifts, and the dreaded “Drive Over-current” appears. Nanjing Zhuye Elevator Parts keeps genuine KDA21310ABG5 units in anti-static packaging, pre-flashed with the latest firmware and ready for same-day despatch—helping you restore premium performance without costly OEM delays.
Product snapshot
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Otis part number KDA21310ABG5, hardware rev. AB-G5, firmware KDA-31.8
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31 kW continuous, 55 kW 60 s overload, 380-480 V three-phase, 50/60 Hz input
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Output 0-480 V, 0-400 Hz, vector or V/F mode, 4 kHz carrier, efficiency > 98 %
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Built-in DC reactor, class A EMI filter, brake chopper 25 kW continuous, 20 % duty
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Dual encoder ports: incremental 5 V / 12 V and absolute EnDat 2.2, 250 kHz max
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Dual safety STO (Safe Torque Off), SIL-3 certified, hardware redundancy
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3 CAN-FD, 1 RS-485, 1 Ethernet 100/1000 for real-time torque, speed and health telemetry
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Operating temperature −10 °C to +50 °C, altitude 1 000 m without derating
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IP20 book-style chassis, 400 × 220 × 180 mm, 9.8 kg, through-panel or DIN-rail mount
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CE, UL, RoHS, REACH and Otis QES 2024 approved
Where it works
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Otis Gen2® Switch, 4200/5200 high-speed gearless up to 6 m/s, 1 600 kg
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Modernisation packages replacing obsolete KDA21300 or six-step drives
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Any controller demanding < 1 % speed ripple and ±1 mm levelling accuracy
Installation method – 30-minute plug-and-play
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Place lift on inspection mode; stop at mid-shaft; switch OFF main breaker; lock & tag.
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Wait 5 min for DC bus to discharge (< 50 V indicated on LED).
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Photograph existing wiring; note encoder plug orientation.
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Remove four mounting screws; slide old inverter out of panel.
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Mount new KDA21310ABG5; torque screws to 1.5 Nm.
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Re-connect mains L1/L2/L3, earth 10 mm², motor U/V/W, brake resistor, encoder, CAN-FD, 24 V logic.
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Power up; green “RDY” LED must illuminate within 3 s, “CAN” LED blinks blue.
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Launch Otis KDA Tool (OKT-31) on laptop; auto-tune detects motor parameters in 120 s.
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Run 20 full-speed cycles; verify temperature < 60 °C on heatsink and no over-current alarms.
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Seal panel; log serial number and firmware v31.8 in maintenance book.
Replacement cycle & preventive maintenance
Otis bulletin SB-KDA-2024-08 recommends:
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Visual inspection every 6 months: clean dust from fan guard, check for swollen DC-link capacitors.
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Measure IGBT Vce sat < 1.8 V at rated current; replace if > 2.5 V.
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Capacitor reform every 8 years or 30 000 operating hours; if ESR > 150 % of nominal, replace entire inverter.
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Replace cooling fan (24 V, 120 mm ball-bearing) every 4 years—bearing lock is the #1 cause of overtemperature faults.
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Immediate replacement if:
– HMI shows “Over-current 03” at start-up (IGBT short),
– DC-bus ripple > 5 V under load,
– heatsink temperature > 70 °C with clean filter,
– STO function fails quarterly test.
Pro tip: 60 % of premature failures are traced to loose motor terminals—re-torque to 2.5 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
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Always use shielded encoder cable, foil facing inward, grounded at inverter only, to prevent Hall-sensor noise.
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Never run motor cables in the same trunking as 400 V mains—induced spikes kill gate drivers.
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Keep a spare KDA21310ABG5 in every high-rise service room; at 9.8 kg it fits on a shelf and saves a night call.
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After lightning storm, check DC-bus voltage ripple < 3 V; mains sag forces higher current and overheats IGBTs.
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Order the “KDA Bundle” (inverter + fan + thermal paste) from Nanjing Zhuye Elevator Parts to eliminate parts hunting and ensure matched components.
Why buy from Nanjing Zhuye Elevator Parts?
We are an Otis-authorised distributor, importing KDA21310ABG5 directly from the Czech factory, pre-loading firmware KDA-31.8 and testing every unit on a 31 kW motor rig for 60 min under full load. Inverters are shipped in anti-static foam with a 24-month replacement warranty. Our 3 000 m² Nanjing warehouse holds 150+ units year-round; orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at three pieces; we can pre-set motor parameters and include a loaner inverter to keep your lifts running during the swap.
Conclusion
The KDA21310ABG5 inverter is the compact powerhouse behind every smooth ride and energy-saving stop. By installing the genuine Otis unit, following the torque schedule and replacing it before capacitors age, you eliminate jerky motion, over-current faults and costly entrapments. Stock genuine KDA21310ABG5 from Nanjing Zhuye Elevator Parts today—because when the drive stops, the whole building stops.
