ABB 2CMA170549R1000 A44 552-110 3-Phase 6A Transformer-Connected Energy Meter

The ABB 2CMA170549R1000 (A44 552-110) is a 3-phase, transformer-connected DIN-rail energy meter from the Platinum range rated 6 A, built for 690 V applications with Class C MID (±0.5%) accuracy. It covers a wide voltage range of 57.7-400 V N-L / 100-690 V L-L and provides 4 programmable digital I/O channels for alarms, tariff shifting, and 8-channel load-profile logging.

Technical Specifications

Certifications & Standards

• IEC 62052-11
• IEC 62053-22
• IEC 62053-23
• EN 50470-1
• EN 50470-3

Selection Notes

The A44 552-110 is transformer-connected rather than direct-wired, so it pairs with external current transformers to meter circuits beyond a direct-connect meter's range, and its 690 V rating covers higher-voltage three-phase distribution than a standard 400 V meter. Class C MID (±0.5%) accuracy is tighter than Class B, which matters for utility-grade billing. Choose this transformer-connected Platinum variant when the installation already has CTs in place or voltage exceeds 400 V L-L.