2277789

Overview

The Phoenix Contact 2277789 is a PACT MCR-V1-21-44-300-5A-1 bus-bar current transformer designed for DIN rail mounting. It features a primary winding rated for 300 A AC and a secondary winding delivering 5 A AC. The unit has an accuracy class of 1 and a rated power of 10 VA. The thermal rated short-time current is 60 times the nominal current, while the continuous current is 1.2 times the nominal value. The surge current capacity is 2.5 times the thermal rated short-time current. The device includes a 20 mm bore for conductor passage.

Feature Summary

• Bus-bar design with integrated mounting for DIN rail installation
• High thermal stability with defined short-time and continuous current ratings
• Precision measurement capability with Class 1 accuracy
• Dedicated secondary output for connection to monitoring or control systems

Applications

• Industrial energy monitoring systems
• Electrical panel current measurement
• Power distribution network supervision
• Automated control system input sensing

Procurement Notes

Verify the specific ordering suffix matches the required configuration, as variations exist within the PACT MCR-V1 series. Confirm that the primary current rating of 300 A aligns with the application load requirements. Ensure the secondary burden does not exceed the 10 VA rated power to maintain Class 1 accuracy. Check for any specific certification requirements such as RoHS compliance relevant to the target market.

Selection Notes

Select this component when a robust bus-bar solution is needed for high-current AC measurement up to 300 A. The 5 A secondary output is suitable for standard industrial meters and relays. Consider the 20 mm bore size to ensure compatibility with the cable diameter in use. The DIN rail mounting option provides flexibility for integration into existing control cabinets without additional brackets.

Part Context

This model belongs to the Phoenix Contact PACT MCR-V1 series, which specializes in modular current transformers for industrial applications. The series offers various primary current ratings and accuracy classes. The 2277789 variant specifically addresses medium-to-high current measurement needs with a focus on durability and precise signal transmission for downstream processing equipment.

Replacement Considerations

Direct substitutes may include other Phoenix Contact models from the PACT MCR-V1 series with matching 300 A primary and 5 A secondary ratings. Verify mechanical dimensions and mounting style compatibility before replacement. Cross-reference technical specifications to ensure equivalent accuracy class and thermal performance.