THE PROBLEM
The end of GPRS has left people in the dark
your substations
The gradual shutdown of 2G and 3G networks since 2023 has cut off monitoring of thousands of electrical substations equipped with GPRS modems. Without reliable monitoring, network operators are forced to conduct systematic and costly on-site inspections.
GPRS Modems Out of Service
The Sierra Wireless, Wavecom, and Cinterion GPRS modems that have been installed in your RTUs for the past 10–15 years no longer work following the shutdown of the 2G/3G networks. Hundreds of units have gone “silent.”
Monitoring Interrupted
Without data feedback, it is impossible to detect power surges, ground faults, transformer overheating, or power outages. Incidents are only discovered when a customer files a complaint.
NIS2 Compliance at Stake
Critical infrastructure operators (distribution system operators, energy providers) must demonstrate continuous monitoring of their assets. Failure to implement remote monitoring exposes them to NIS2/NIS regulatory penalties.
THE EZIWAN SOLUTION
Industrial 4G LTE Gateway
for smart grids and energy
Designed to meet the demands of the energy sector: enhanced electromagnetic immunity, battery power supply, IEC 60870/61850 protocols, and NIS2 cybersecurity.
Replacement of GPRS Modems
Direct migration from your existing GPRS RTUs. The Eziwan gateway connects to the same measurement devices (Modbus, IEC 60870) without the need for rewiring.
Real-Time RSRP Monitoring
Continuous monitoring of LTE signal quality (RSRP, RSRQ, SINR). Alerts in the event of degradation before any loss of supervision.
Multi-station supervision
Centralized dashboard for 100+ substations. Map view, load curves, energy balances, and performance metrics.
Dual SIM Failover
Two multi-carrier SIM cards with automatic switching. Failover time of less than 60 seconds, transparent to your SCADA system.
Predictive Maintenance
Analysis of transformer temperature trends and aging curves. Anticipate failures before they occur.
Secure Remote Access
Built-in OpenVPN/IPSec VPN for remote access to protection relays and substation meters. No open ports, comprehensive audit log.
Integration with Existing SCADA System
REST and MQTT APIs for integration with AVEVA, Wonderware, and SIMATIC WinCC. Compliant with IEC 61968 / IEC 61970 (CIM) for network GIS.
Automatic Energy Balance
Automatic calculation of HV/LV balance sheets, technical losses, and power factor. Automatic export to your asset management tools.
ENERGY USE CASES
Eziwan for all players in the energy sector
Distribution Network Manager
Problem
Hundreds of HV/LV substations spread across the entire region. The discontinuation of the GPRS network has disrupted remote meter reading for energy meters and remote monitoring of circuit breakers. Maintenance crews must travel to perform tasks that could otherwise be avoided.
Eziwan Solution
Eziwan replaces the GPRS modems at all source stations and HV/LV substations. Modbus data (active and reactive power, voltages, currents, circuit breaker statuses) is transmitted to the platform in real time. The quality of the LTE signal is continuously monitored.
Measured results
TECHNICAL SPECIFICATIONS
Designed for environments
challenging electrical systems
Frequently Asked Questions
GPRS → 4G LTE MIGRATION
Your substations deserve
supervision worthy of the name
Free GPRS migration audit. We analyze your existing infrastructure and propose a phased migration plan that ensures uninterrupted monitoring.