Purchase now the 20-750-EMC1-F2, a specialized electromagnetic compatibility (EMC) filter designed specifically for the Allen-Bradley PowerFlex 750-Series variable frequency drives. This internal filter is critical for reducing conducted electromagnetic interference and ensuring that your motor control system complies with rigorous industrial EMC standards.
What Is the 20-750-EMC1-F2?
The 20-750-EMC1-F2 is an internal EMC filter kit classified under Category C2. It is engineered to fit seamlessly into the chassis of PowerFlex 753 and PowerFlex 755 drives. The primary function of this filter is to suppress high-frequency electrical noise generated by the drive’s power electronics during pulse width modulation (PWM). By installing the 20-750-EMC1-F2, you ensure that the electromagnetic emissions remain within the limits defined for «First Environment» applications where the drive is connected to a public low-voltage network, or «Second Environment» industrial locations with sensitive equipment. This prevents interference with programmable logic controllers (PLCs), sensors, and communication networks within the same electrical cabinet.
Key Technical Specifications
- EMC Category: C2 (EN61800-3)
- Compatibility: PowerFlex 750-Series (PF753, PF755)
- Frame Sizes: Frame 2 specific
- Filter Type: Internal RFI/EMC suppression
- Voltage Range: Optimized for 400V/480V AC systems
- Installation: Internal plug-in mounting
- Standards Compliance: CE, C-Tick, and RoHS
Architecture and System Performance
The architecture of the 20-750-EMC1-F2 involves a series of capacitors and inductors designed to shunt high-frequency noise to ground. In the PowerFlex 750 modular system, this filter is integrated into the power structure of the drive, requiring no additional external footprint. This is a significant advantage over external line filters which consume valuable DIN rail or panel space. Using the internal C2 filter ensures that the drive meets electromagnetic compatibility requirements without the complexity of external wiring, which further reduces potential failure points and installation labor costs.
Expert Tips
When deploying the 20-750-EMC1-F2, ensure that your drive is used on a solidly grounded (Wye) power system. If you are operating on an ungrounded or high-impedance grounded system (IT network), you must disconnect the internal jumper to the filter to avoid damaging the module. For the filter to be 100% effective, the motor cable must be shielded, and the shield must be properly terminated at the drive’s ground plate using a 360-degree EMC clamp.
Frequently Asked Questions
Q: Can the 20-750-EMC1-F2 be used on a Frame 3 drive?
A: No, the F2 designation indicates it is specifically sized for Frame 2 drives. Frame 3 drives require the 20-750-EMC1-F3 kit to ensure physical fit and electrical capacity.
Q: Is this filter required for UL compliance?
A: While not strictly required for UL safety, it is often necessary to meet CE (European) EMC directives and to prevent operational issues in systems with sensitive analog signaling.
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