Schneider Electric LV434021 PowerTag NSX Energy M250 Wireless Energy Sensor 3P+N 250 A Wireless Energy Sensor

The Schneider Electric LV434021 is a PowerTag Energy M250 wireless energy sensor for 3P+N circuits up to 250 A, built with a Monoconnect form factor for direct mounting on the bottom of Compact NSX 100/160/250, Compact NS 100/160/250, Compact INS250, and Compact INV 100/160/200/250 circuit breakers. It measures active and reactive energy, power, current, voltage and power factor to IEC 61557-12, and relays the readings over its built-in 2.4 GHz radio to a PowerTag-compatible concentrator or gateway for circuit-level monitoring.

Technical Specifications

Certifications & Standards

• IEC 61557-12
• IEC 61010-1
• IEC 61010-2-030
• IEC 61326-1
• ETSI EN 300 328
• ETSI EN 301 489-1

Selection Notes

Choosing between the 250 A M250 and its sibling current rating comes down to the breaker frame it mounts on: this sensor only fits Compact NSX 100/160/250, Compact NS 100/160/250, Compact INS250, and Compact INV 100/160/200/250, so the breaker's own rated current — not the circuit's actual load — determines which PowerTag model is correct. The added neutral conductor on this 3P + N variant is needed when the circuit's neutral current or neutral-referenced energy must be measured separately, such as on a TN-S distribution feeding unbalanced single-phase loads off a three-phase-plus-neutral breaker. The basic current (Ib) of 40 A sets the lower bound for accurate Class 1 metering; below that, readings fall outside the IEC 61557-12 accuracy class.