Description
Otis Elevator Inverter OVFR03B-402 KBA21310ABF2 Brief Introduction
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Product Name
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Otis Elevator Inverter OVFR03B-402 |
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Model
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KBA21305ABZ10 KBA21310ABF2
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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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Elevator Inverter OVFR03B-402 – The 40 kW Power-Brain That Turns Motor Current into Silent Rides
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Courtesy of Nanjing Zhuye Elevator Parts Co., Ltd.
Every smooth lift begins with a green box humming in the controller cabinet. The OVFR03B-402 is a 40 kW, 400 V class open-loop vector inverter designed specifically for gearless elevator applications. It talks to the mother-board via CAN-bus, modulates torque in real time, and still keeps audible noise below 55 dB. Nanjing Zhuye Elevator Parts keeps factory-sealed OVFR03B-402 units on the shelf for same-day despatch. Below we explain what the drive does, how to commission it in under 20 minutes, and the replacement cycle that prevents expensive “torque fault” call-backs.
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What OVFR03B-402 Really Does
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Converts 3 × 380–480 VAC, 50/60 Hz into 3 × 0–400 VAC, 0–100 Hz with 0.01 Hz resolution
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Delivers 150 % starting torque at 0.5 Hz—perfect for gearless PM machines up to 40 kW
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Built-in 3 % line reactor reduces harmonics to <5 % THD, meeting IEEE-519
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Integrated brake-chopper (220 A peak) for 4 Ω external resistor—no extra module needed
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CAN-open 125 kbit/s or 0–10 V analogue input for both Otis and third-party MCUs
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Temperature-controlled cooling fan: only runs >45 °C, extending bearing life to 70,000 h
If the inverter faults, the lift coasts, the display shows “OVF” or “TORQUE TIMEOUT”, and rescue operation is required.
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Compatible Systems
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Otis Gen2®/Gen2-Life 1.0–2.5 m s⁻¹, 40 kW PM machines
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Thyssen Synergy® Evolution® retrofits
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Chinese MRL controllers with 400 V class permanent-magnet motors
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Simplex or group (≤8 cars)
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Commissioning – 20-Minute Start-Up Safety: lock main breaker, discharge DC bus <50 V, tag out.
Step 1 – Mount inverter on 35 mm DIN rail; leave 100 mm air gap above and below. Step 2 – Connect input through 63 A moulded-case breaker; torque lugs to 2.5 N·m. Step 3 – Wire motor U/V/W to T1/T2/T3; install shielded cable, earth at both ends. Step 4 – Connect brake resistor to B+/B-; set jumper J3 to “400 V 4 Ω”. Step 5 – Plug 4-way CAN: H/L/Shield/0 V; terminate 120 Ω if last node. Step 6 – Apply 24 VDC control supply; display shows “0.0”. Step 7 – Enter motor name-plate values:
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Pn = motor kW
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Un = 400 V
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In = motor amps
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nn = rated rpm Step 8 – Perform static auto-tune: press RUN; inverter rotates 1/8 turn, stores stator resistance. Step 9 – Save parameters to EEPROM (P1.07 = 1); run full-speed inspection; verify current <110 % In. No oscilloscope needed—OVFR03B-402 is pre-tuned for elevator duty.
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Daily Operation – What the Inverter Actually Does
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Updates torque loop every 250 µs; speed ripple <0.02 %
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Auto-compensates for load weight; prevents rollback during emergency stop
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Built-in PTB brake test: weekly 150 % torque for 2 s, logs result for inspector
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Fan only runs >45 °C—noise in machine room <55 dB(A)
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Replacement Cycle & Preventive Maintenance
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High-traffic office (>1,000 starts day⁻¹) – blow dust every 3 months, replace inverter every 8 years
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Residential tower (300–600 starts day⁻¹) – inspect annually, replace every 12 years
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Low-rise freight (≤200 starts day⁻¹) – inspect every 18 months, replace every 15 years
Replace immediately if:
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DC bus voltage swings >750 V or <450 V under load
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IGBT thermal sensor >85 °C with fan running
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Brake chopper faults ≥3 times in 30 days
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Capacitor bulge or ESR >150 % of spec
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Encoder pulse jitter >4 % at constant speed
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Extending Life – 3 Pro Tips
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Keep ambient <40 °C; every 10 °C rise halves capacitor life
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Torque lugs annually; loose connections cause arcing and ozone
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Run built-in capacitor test (P9.21) every 6 months; logs capacitance trend
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Why Buy OVFR03B-402 from Nanjing Zhuye Elevator Parts?
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Factory-new, not refurbished; passes 4 h burn-in at 60 °C full load
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Built-in 3 % line reactor—no extra purchase
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Dual stock: 90 pcs Nanjing, 30 pcs Dubai—next-day air to 65 countries
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Bundle kit: inverter + 4 Ω brake resistor + 3 m shielded motor cable—8 % discount
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24 months warranty, return & replace, no factory RMA
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7×24 WhatsApp/WeChat video support; average response 12 min
We reply within 12 h with price, datasheet and a free Excel template that reminds you when the next inverter replacement is due.
Conclusion The OVFR03B-402 inverter is the power-brain that turns raw electricity into whisper-quiet rides. A single capacitor fault can park a car for hours. Keep a spare OVFR03B-402 from Nanjing Zhuye on every service truck, swap it on schedule, and replace “torque fault” panic with a fifteen-minute planned fix—one smooth, silent ride at a time.
