REX meter

Elster's REX® meter is an electronic meter designed for residential metering. With two-way communications, it offers demand, TOU, load profile recording, bidirectional metering, and critical tier pricing (CTP) capabilities in addition to kWh consumption measurement. The REX meter has on-board two-way radio frequency (RF) communications that permit the meter to respond to requests over an unlicensed 900 MHz local area network (LAN). REX meters deployed on the EnergyAxis® System act as repeaters and are self-registering.

Elster is committed to supporting utility initiatives in energy conservation. Through its open architecture, Elster's EnergyAxis System is able to integrate with third party electric load control devices, demand-side management devices, in-home displays, and pre-payment services. For residential meters, an optional internal service control switch can remotely disconnect and reconnect electricity service.

The capability of the EnergyAxis communications network enables sophisticated billing and systems data collection, automated account management, and provides alerts for different events (such as outages, tamper indicators, and other system anomalies).

The REX meter is available in Forms 1S, 2S, 3S, 4S, and 12S socket-type bases. It has a 0.5 ANSI accuracy class.


Quantities TOU and demand Load profile recording Service control switch About EnergyAxis  
Standards compliance Data sheet  

Available quantities:

  • kWh delivered
  • kWh received
  • kWh sum (delivered + received)
  • kWh net (delivered - received)

In addition, kWh received is always measured.


TOU and demand

The REX meter supports a four–tier, four–season TOU rate. Energy values can be assigned to any of the four TOU tiers. Demand (kW) can be assigned to any two of the TOU tiers. Previous season data is also available following a season change.

Demand may also be assigned as a block interval maximum value and computed on 15, 30 or 60 minute intervals.


Load profile recording

The REX meter provides load profile recording. The selectable interval lengths are 15, 30, or 60 minutes. The REX meter load profile record is periodically transferred to the local A3 ALPHA meter/collector where it is stored until transferred to the EnergyAxis Metering Automation Server (MAS) via a public wide area network (WAN) connection.


With the optional service control switch (which must be specified at the time of ordering), the utility can remotely disconnect or reconnect power to a consumer. Additionally, the REX meter can be programmed to automatically disconnect power when the demand reaches a programmed threshold and to restore power a set number of minutes after the end of the demand interval.

 

The internal service control switch is available on Forms 1S, 2S, and 12S meters.


EnergyAxis System

EnergyAxis is the most advanced and complete suite of smart grid solutions. Developed by Elster, the world's leader in smart metering, the EnergyAxis System architecture is the most interoperable smart grid communications solution available. With verified applications for demand response, distribution automation, outage detection/restoration, revenue protection, we know how to seamless integrate with almost any operation.

 

EnergyAxis is engineered on open standards, allowing us to interface with the greatest range of powerful third-party technologies and providing you with the widest choice of communication paths possible. Our unsurpassed interoperability enables us to partner with over 40 smart grid companies and apply all relevant technologies to meet your need, and they are proven to work.

 

Elster is committed to supporting utility initiatives in energy conservation. Through its open architecture, EnergyAxis is able to integrate with third party electric load control devices, demand-side management devices, in-home displays, and pre-payment services.

 

Visit the EnergyAxis Web site for more information on Elster's advanced metering infrastructure solution.


The REX meter meets or exceeds the ANSI standards for electricity metering, and it is intended for residential utility customers.

  • ANSI C12.1 (2001): American National Standard for Electric Meters - Code for Electricity Metering
  • ANSI C12.10 (1997): Electromechanical Watthour Meters
  • ANSI C12.20 (1998): American National Standard for Electricity meters 0.2 and 0.5 Accuracy Classes

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