Allen Bradley 1336 PLUS Inverter Practical Guide

Allen Bradley 1336 PLUS Inverter Practical Guide: A Comprehensive Analysis from Installation and Wiring to Troubleshooting

In the field of industrial transmission, Allen Bradley's 1336 PLUS series frequency converters are widely used in motor drive applications ranging from 0.37kW to 448kW due to their stable performance, flexible control methods, and powerful sensorless vector control capabilities. Although the series has gradually withdrawn from the market, the 1336 PLUS remains a must-have equipment for engineers in a large number of old production lines, renovation projects, and spare parts replacement scenarios. This article will systematically review the installation points, control wiring, parameter programming logic, startup and debugging process, and troubleshooting methods for common fault codes of the 1336 PLUS inverter based on the original user manual, providing a complete technical reference for on-site maintenance and fault diagnosis.

Safety first: preparation before installation that cannot be ignored

Any inverter operation must prioritize safety. The 1336 PLUS manual repeatedly emphasizes:

Residual voltage hazard: After the main circuit is powered off, it is necessary to wait for the DC bus capacitor to discharge before any internal operations can be carried out. Measure the voltage between "DC+" and "DC -" on the TB1 terminal block and confirm that it has dropped to zero volts.

ESD sensitive components: The frequency converter contains static sensitive components inside, and static protection measures must be taken during installation, testing, or maintenance (such as wearing a grounding wristband and and using an anti-static workbench).

Only professional personnel are allowed to operate: Only personnel familiar with 1336 PLUS and related mechanical equipment can install, debug, and maintain it.

Software version compatibility: For frequency converters with a power of 45kW or above, the software version must not be lower than 1.07, otherwise it may cause equipment damage or personal injury. Different power levels correspond to different minimum version requirements, for example, 0.37-0.75kW (200-240V) requires 1.05 or above, while 5.5-11kW requires 1.05 or 1.06, etc.

Installation and heat dissipation: key factors determining long-term operational reliability

The installation of 1336 PLUS frequency converter must strictly follow the requirements of heat dissipation spacing, otherwise overheating may cause overheating faults (F08) or shorten the service life.

Minimum spacing: Adequate ventilation space should be left above and below the frequency converter. For A4 machine frames, if installed on combustible surfaces, a 6.35mm shim must be placed under the feet of the installation; The F frame requires a distance of at least 152.4mm from the installation wall on the back and at least 76.2mm from other equipment on both sides.

Environmental conditions: The ambient temperature for IP20 (NEMA 1) enclosed drives is 0-40 ° C, for open drives (IP00) it is 0-50 ° C, and the relative humidity is 5-95% without condensation. If the altitude exceeds 1000 meters, it needs to be downgraded for use.

Heat sink inspection: Regularly clean the dust on the heat sink to ensure that the cooling fan is working properly. The manual provides dissipated power data for each rack, which is used for thermal calculation when users bring their own cabinets.

Main circuit wiring and selection of protective devices

1. Power supply and grounding

1336 PLUS is suitable for symmetrical three-phase power supply, and the phase voltage imbalance should not exceed 3%. For asymmetric or poorly grounded distribution systems (such as corner grounding systems), it is strongly recommended to use isolation transformers and ground the secondary neutral point.

Grounding: A dedicated grounding terminal PE (located on the TB1 terminal block) must be used. The grounding impedance must comply with local electrical codes (NEC, VDE, etc.). When multiple frequency converters share a cabinet, a single point grounding bus should be used. The shielding layer of the control signal should be connected to the TE (true) terminal, which needs to be separately led to the ground and should not be mixed with PE.

Input fuse: The fuse specified in Table 2. A of the manual must be used, otherwise the short-circuit protection performance cannot be guaranteed. The frequency converter is suitable for circuits with a maximum symmetrical current of 200000A and below 600V.

2. Power side reactor and filter

When the capacity of the power transformer is greater than 10 times the rated capacity of the frequency converter, or when there is power factor compensation capacitor switching on the power supply side, it is recommended to install a 5% input reactor or isolation transformer to suppress harmonics and voltage spikes.

When complying with the CE EMC directive, an RFI filter (see Appendix C) must be selected and shielded cables must be used.

3. Precautions on the output side

Motor cable length: Due to the phenomenon of reflected waves, long-distance cables will generate voltage doubling at the motor end, damaging the motor insulation. 1336 PLUS provides the maximum cable length without external devices for different machine frames and voltage levels. For example, for 380-480V drives, if no components are added, A/B shelves usually allow for 30-50 meters; Exceeding the limit requires the installation of output reactors (1321 series) or cable terminations (1204-TFA1/TFB2).