Mini RTU cabinet for distribution network automation


Empower Your Substation with Advanced Automation and Reliable Protection.

Flexible and open design

100% fit into customer requirements


The Elseta WCCLite RTU is a compact and cost-effective solution for medium voltage (MV) applications. It is based on the Elseta WCCLite platform, which is a proven and reliable design. The WCCLite RTU is housed in a robust and weatherproof cabinet that is designed to withstand the harsh conditions of the MV environment.

In addition to the standard features of the Elseta WCCLite RTU, the cabinet can be equipped with an Fault Passage Indicator (FPI) and power monitoring capabilities for medium and low voltage feeders. An FPI is a device that detects and indicates the passage of a fault current on an MV cable. This information, along with power measurements, is valuable for maintenance, troubleshooting, and optimising network performance.


  • Compact and cost-effective
  • Robust and weatherproof cabinet
  • Modular design
  • Up to 8 feeders
  • Rugged connectors for monitoring and control (Harting and Phoenix Contact) for each feeder
  • Wide range of I/O modules
  • Communication including Radio, Ethernet, Fiberoptic, 3G/4G/5G
  • Flexible power supply options
  • Compatible with a wide range of SCADA and ADMS systems
  • Optional cost effective LV and MV measurements voltages, currents, power, and phase angles also can include THD
  • Optional measurements from low power measurement sensors also current(CT) and voltage(VT) transformers
  • Optional FPI for fault detection and indication


Device dataDescription
Article numberMini RTU Cabinet series
Product descriptionThe Mini RTU Cabinet is designed for Ring Main Unit (RMU) monitoring and control, functioning as an Intelligent Electronic Device (IED) or RTU. It excels in monitoring, measurement, fault indication (FPI), protection, and control tasks. This system ensures comprehensive remote monitoring, control, and maintenance communication with SCADA systems, incorporating battery backup and IEDs data concentration capabilities.
Its system architecture allows for extensive scalability, supporting an unlimited number of signals from the substation. The Mini RTU Cabinet is adaptable to a range of power supply voltages, from 10–220 V DC to 80–230 V AC, and includes multiple communication ports compatible with all current standards in power distribution control.
The system is equipped with high-accuracy 3-phase measurement and advanced fault detection, leveraging Elseta’s proprietary FPI technology. It can also integrate existing protection relay functionality for medium voltage (MV) feeders. For communication, the unit supports optical fiber connections and an integrated GSM/UMTS/LTE modem. It is compatible with various communication protocols, including IEC 60870-5-104, DNP3, and IEC 61850, among others, ensuring versatile and robust connectivity in diverse operational environments.
Configuration softwareWCC Excel utility, IOMOD utility, Putty, Web browser
Warranty2 years
GeneralMain RTU cabinet features
All-in-One SolutionProvides complete remote monitoring, control, and maintenance communication with SCADA, including battery backup and IEDs data concentration​.
System ExpandabilityWide range system expandability with practically unlimited number of signals, measurements and control commands.
Power supplyOptional power supply voltages ranging from 10–220 V DC or 80–230 V AC, and a variety of communication ports that support all state-of-art standards in power distribution control​.
Battery charger12, 24,48 VDC voltage systems for RTU power supply with battery temperature monitoring. Various signals of battery, power supply and alarm signals integrated into RTU.
Feeder’s connectorDurable connectors equipped with grounding, shielding, and various safety features facilitate the connection to feeders using standardised interfaces. This design simplifies and accelerates the process of installing automation systems for electricians and utility workers. Additionally, it supports straightforward maintenance and hassle-free replacement.
Multi-time sync options (priority based):– Internal RTC clock with battery-based memory up to >15 years of lifetime;
– NTP (Network Time Protocol) over TCP/IP;
– IEC 60870-5 time sync support;
– DNP3 time sync support;
– IEC 61850 time sync support.
Data storageRTU provides an archive of all data on non-volatile flash for events, measurements, counter values, and security events.
Time managementLocal user administration with different access levels
Central user administration via RADIUS
Time sync sourcesMini RTU series provides a multilevel time management solution CPU supports NTP, IEC 60870, and DNP3 time sync multi-sourcing and IOMOD devices have a time-sync option with IEC 60870 protocol firmware.
Communication interfacesInterfaces for communication with IEDs, Meters, inverters, SCADA systems and etc.
Independent Ethernet ports2x 10/100 Mbps 10/100Base-T compliance IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX
Serial ports2x RS485 (Standard ANSI/TIA/EIA-485-A)
Serial ports1x RS232 (Standard EIA/TIA-232-E) Switchable with RS485 port1
Mobile communicationAvailable only with integrated WCCLite version with mobile communication module
Mobile technology support4G (LTE) – Cat 4 up to 150 Mbps, 3G – Up to 42 Mbps, 2G – Up to 236.8 kbps
Dual SIM card support2 SIM cards, auto-switch cases: weak signal, data limit, no network, network denied, data connection fail
Other mobile info Signal strength (RSSI), SINR, RSRP, RSRQ, RSCP, IMSI, ICCID, Signal strength LED indicators, SMS receive/send, APN management.
LED indicationTo indicate traffic on the interface every interface has an independent LED indication on receiving/sending the packet.
Supported protocolsHost and sub-device communication protocols
IEC 60870IEC 60870-5-101 Master support
IEC 60870-5-101 Slave support
IEC 60870-5-103 Master support (WCCLite only)
IEC 60870-5-103 Slave support (IOMOD modules only)
IEC 60870-5-104 Master support
IEC 60870-5-104 Slave support (KEMA Cert.) + IEC 62351 (parts -3) security standard is supported TLS encryption
DNP3DNP3.0 TCP(LAN/WAN) Master support
DNP3.0 TCP(LAN/WAN) Slave support
DNP3.0 Serial Master support
DNP3.0 Serial Slave support
IEC 62351 (parts -3) security standard is supported by TLS encryption
ModbusModbus RTU Master support
Modbus RTU Slave support
Modbus ASCII Master support
Modbus ASCII Slave support
Modbus TCP Master support
Modbus TCP Slave support
IEC 61850-8-1Client (Master) support of Editions 1, 2, 2.1
– MMS client
– Read services
– Write services
– Static data sets
– Report Control blocks
– Controls
– Discovery
Server (Slave) support of Editions 1, 2, 2.1
– MMS server
– Read services
– Write services
– Static data sets
– Report Control blocks
– Controls
– Discovery
IEC 62351 (parts -3, -4, -5, and -6) security standard is supported for authentication and TLS encryption
Meter protocolsM-bus Master support
DLMS/COSEM master support
IEC 62056-21 master support
IEC 62056-31 master support
Other protocolsMQTT, RESTful API
Cyber securityComply with BDEW white paper, IEC 62351, and general cyber security practices
Secure accessSecure access to all services (HTTPS, SSH)
RBACRole-based access protection with login and password
IEC 62351 by security standards is supported.
User administrationLocal user’s administration with different access levels
Central user administration via RADIUS
Password complexity Fully customizable password policy:
– minimum password length,
– maximum password lifetime,
– usage of lowercase characters,
– upper case characters,
– numeric,
– special characters.
Certificate storage Internal Crypto Store for certificate management
Import of certificates
Operating conditions
Operating temperature-40°C … 75°C
Storage temperature-40°C … 85°C
Relative humiditymax. 95 % (non-condensing)
Protection classIP65
Installation typeWall mounting
Case height x width x depth400 x 300 x 200 mm
Cabinet dimensions can be variable


For more information on DLMS, Modbus, and IEC 60870-5-104 protocols, as well as configuration options for WCCLite and other related products, we recommend a visit to There you’ll find a wealth of resources to help you better understand these technologies and how they can be used to optimise the performance of your systems.

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