Schneider Electric LV434020 PowerTag 250 A 3P Energy Sensor

LV434020: PowerTag M250 wireless energy sensor for 250 A breakers

The LV434020 is a Schneider Electric PowerLogic PowerTag M250 energy sensor, a wireless three-pole current and voltage sensing device that bolts onto the bottom terminals of a circuit breaker in a switchboard. It is the 250 A member of the PowerTag Monoconnect family and reports its measurements over radio rather than over a wired meter bus.

The datasheet describes the form factor as Monoconnect, mounted by bolting on, with the mounting location at the bottom of the breaker and the mounting support listed as on circuit breaker. Because the sensor is installed in the power path, its measured current range, basic current and saturation current all depend on the 250 A size: the basic current Ib is 40 A, the starting current is 160 mA and the saturation current is 500 A.

LV434020 technical specifications

Breakers and gateways compatible with the LV434020

The sensor is sized for the breakers listed in the datasheet range compatibility: ComPacT NSX NSX100, ComPacT NSX NSX250, Compact NS100, Compact NS250, TeSys GV5, TeSys GV7, EasyPact CVS100, EasyPact CVS160, EasyPact CVS250. Choosing the sensor means choosing the breaker frame first, because the sensor bolts straight onto it.

Data leaves the sensor by radio to a concentrator. The datasheet lists these compatible gateways: EcoStruxure Panel Server Entry, EcoStruxure Panel Server Universal, EcoStruxure Panel Server Advanced, Harmony Hub, Acti9 Smartlink SI B, Acti9 Smartlink SI D, Acti9 PowerTag Link, Acti9 PowerTag Link HD. One gateway can serve many sensors in the same switchboard, so the radio link replaces the individual wiring of a metering loop.

LV434020 against the other Monoconnect sensor in this group

Two sizes of PowerTag Monoconnect are in this catalogue group: the LV434020 for 250 A and the LV434022 for 630 A. The comparison below shows how the datasheet ratings and physical size scale between them.

The larger sensor pairs with the larger breaker frames and needs more torque and more space; the radio, supply and accuracy data are the same.

Installation, torque and radio considerations for the LV434020

The connection pitch is 35 mm and the bolts are tightened to 10 N.m. That figure is high enough that a calibrated wrench is the right tool, and the breaker terminals and lugs must be reassembled to the breaker maker’s instructions after the sensor is fitted. The housing is 57 mm high, 105 mm wide and 86 mm deep and weighs 250 g.

The radio link works at 2.4 GHz with a transmission time of less than 5 ms and an emission power of 10 mW, to IEEE 802.15.4. Metal enclosures attenuate radio, so the gateway should be in the same compartment or in a position with a clear radio path. The datasheet gives the supply as 230 V AC phase to neutral or 400 V AC between phases, with a maximum power consumption of 3.7 VA.

Using the LV434020 in Oman and the GCC

Energy monitoring is increasingly asked for in commercial buildings, data rooms, water and wastewater plants and industrial utility switchboards in Oman and the GCC, where cooling load makes electricity a major running cost. A 250 A sensor is typically placed on a main incomer or a large feeder to a chiller, pump or sub-board.

The datasheet gives an operating range of -25 to 70 °C, a storage range of -50 to 85 °C and humidity up to 95 % at 55 °C, with IP20 protection. Inside a switchboard in a hot plant room, the real temperature near the breaker lugs at full load is what to check against these limits.

Selection checklist and RFQ details for the LV434020

• Breaker model and frame: the sensor must match one of the ranges in the compatibility list for the 250 A size
• Number of sensors and the gateway or concentrator that will collect them
• Load current profile against the measured range of 8–250 A and the starting current of 160 mA
• Panel space for a sensor 57 mm high, 105 mm wide and 86 mm deep, and the clearance at the breaker terminals
• Radio path from the sensor to the gateway inside the metal enclosure
• Supply configuration: 230 V phase-neutral or 400 V between phases

Please include the following in an enquiry:

• Part number LV434020 and quantity
• Breaker type and rating the sensor will be fitted to
• Gateway or software platform in use
• Delivery location and required date

Measurement functions and accuracy of the LV434020

The LV434020 measures active and reactive energy, active, reactive and apparent power, current, voltage and power factor, and the datasheet states accuracy classes to IEC 61557-12 at 25 °C. The current range measured is 8–250 A, and active power is covered from 88 W–416 kW, which sets the span of loads the sensor can resolve on a 250 A feeder.

Voltage is measured between phases from 320 to 480 V and between phase and neutral from 184 to 276 V, frequency from 45 to 65 Hz. The sensor also detects voltage loss with the measured current at the moment of loss, which is useful for diagnosing nuisance outages. The datasheet lists energy management, overload alarm, power factor, load monitoring and circuit monitoring as the product-specific applications.

Documents and quotation

The Schneider Electric manufacturer datasheet for the LV434020 is attached on this page as a PDF. It is the reference for every rating quoted above, and it is worth checking the revision against your project documents before an order is placed. The accuracy classes, compatibility lists and environmental data are all in it.

Seven Star LLC is an independent supplier in Muscat that serves buyers in Oman and the GCC. Send the part number LV434020, the quantity and the delivery site, and we will reply with a quotation and the availability we can confirm.