Rectifier stage
Three-phase line power enters the rectifier and charges the internal DC bus.
Input1305-BA03A / 1305-BA04A / 1305-BA06AAllen-Bradley adjustable-frequency AC drives
Bulletin 1305 Series C · exact-model technical comparison
Product Summary
Within the Bulletin 1305 Series C range, Allen-Bradley 1305-BA03A / 1305-BA04A / 1305-BA06A are three-phase 380/460 V adjustable-frequency drives for progressively larger motor outputs. Each unit rectifies the incoming line, regulates the DC bus, and synthesizes variable-frequency motor voltage through a PWM inverter.
Control for 1305-BA03A / 1305-BA04A / 1305-BA06A can enter through discrete inputs and the selectable analog reference, while programmable relay and analog outputs return operating status. The three catalog numbers retain the same command relationships, but their current, kVA, and motor-output values must remain tied to the individual column during selection.
Technical Details
Technical Item1305-BA03A1305-BA04A1305-BA06A
| Brand | Allen-Bradley | ||
|---|---|---|---|
| Product Type | Bulletin 1305 adjustable-frequency AC drive | ||
| Product Family | 1305 Series C | ||
| Input Voltage | 380/460 V AC, three-phase | ||
| Operating Voltage Range | 340…500 V AC | ||
| Input Frequency | 47…63 Hz | ||
| Motor Output | 0.75 kW (1 hp) | 1.5 kW (2 hp) | 2.2 kW (3 hp) |
| Output Current | 2.3 A | 4.0 A | 6.0 A |
| Maximum Input kVA | 1.7 kVA | 3.1 kVA | 4.6 kVA |
| Output Frequency | 0…400 Hz | ||
| Drive Efficiency | 97.5% at rated amperes, nominal line voltage | ||
| Enclosure | IP30 / NEMA Type 1 | ||
| Cooling | Natural convection | ||
| Operating Temperature | 0…50 °C | ||
| Relative Humidity | 0…95%, noncondensing | ||
| Control Method | Sine-coded PWM; volts-per-hertz regulation | ||
| Analog Input | 0…10 V DC or 4…20 mA | ||
| Relay Output | Form C programmable contact | ||
Diagnostics and Protection — Bus and Fault Supervision
Protection logic in 1305-BA03A / 1305-BA04A / 1305-BA06A monitors the power stage and identifies conditions that prevent normal operation.
Voltage supervision
The drive checks DC-bus conditions created by the line supply and regenerated motor energy.
Electronic motor protection
Programmed motor data and output current are used to supervise sustained overload demand.
Fault history and relay
Fault codes identify the detected condition while the programmable relay can signal drive state externally.
Setup and Operation Questions
How should 1305-BA03A / 1305-BA04A / 1305-BA06A be separated in a quotation?
For 1305-BA03A / 1305-BA04A / 1305-BA06A, record the exact suffix with motor kilowatts, output current, supply voltage, and enclosure requirement; the shared Series C controls do not make the power stages identical.
Why might 1305-BA03A / 1305-BA04A / 1305-BA06A run at the wrong speed after wiring?
Check the selected frequency-reference source on 1305-BA03A / 1305-BA04A / 1305-BA06A, then verify whether the analog input is configured for voltage or current and whether minimum, maximum, and scaling parameters match the signal.
What should be checked when 1305-BA03A / 1305-BA04A / 1305-BA06A trip during deceleration?
For 1305-BA03A / 1305-BA04A / 1305-BA06A, compare the programmed deceleration time and returned load energy with the braking arrangement; a faster stop can raise the DC bus even when steady-state motor current is acceptable.
Can one set of branch devices be copied across 1305-BA03A / 1305-BA04A / 1305-BA06A?
No. 1305-BA03A / 1305-BA04A / 1305-BA06A draw different current and kVA, so fuses, circuit breakers, contactors, and conductors must be selected for the exact drive.
Why should motor leads be kept away from the analog reference on 1305-BA03A / 1305-BA04A / 1305-BA06A?
The switched output of 1305-BA03A / 1305-BA04A / 1305-BA06A can couple noise into the low-level reference. Separate routing and correct shielding help prevent unstable commands.
Which information helps investigate a fault on 1305-BA03A / 1305-BA04A / 1305-BA06A?
Preserve the displayed fault, operating frequency, motor current, bus behavior, command source, and recent run/stop sequence for 1305-BA03A / 1305-BA04A / 1305-BA06A before power cycling clears the context.
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