R421 is an advanced LT type, TOD / TOU, CT operated three-phase energy meter used for large commercial and small/medium industrial connections. It has super capacitor enabling it to display ON in-case of power outage/failure. To resolve energy theft prevalent in local market, R421 is carefully designed with stringent anti-tampering features. To offer highest level of flexibility, it can operate as a standalone product. State of the art digital sigma delta ADC integrated circuits are used to measure active, reactive and MDI. A two element standard optical interface in accordance with IEC 62056-21 has been provided for the purpose of parameterization and downloading the data to pc/laptop.

Key Features:

• Reading Display in Case of Power Outage/Failure with the help of batteries and super capacitor.
• Long Life, Clear, Wide and High Contrast Display with Broad Viewing Angle.
• Phase Indication (A, B, C) and Indication of Load with Circle around the
  Respective Phase on LCD.
• Power Factor
  • Instantaneous (By Phase & Average)
  • Monthly Average (By Rate & Total)
• Active and Reactive Energy Measurement.
• Active and Reactive Power Measurement.
• Load profile data recording with programmable time interval.
• Impulse Output Displayed on LED for kWh and kvarh for field testing.
• IrDA / Optical Communication Port for Laptop / PC.
• Programming of Tariff and Seasons through EMS (Energy Management System)
• Display Scroll and MDI Reset Button
• MDI TOD (Time of Day).
• Frequency Measurement.
• Meter Data Management with Multi User Capabilities.
• Low Battery indication on LCD.
• Display Off in case of Power Outage to Increase Battery Life. Display can be On by pressing First Push Button.