HJ-RMU Series Modular Ring Main Unit (Smart Integrated Edition)

Name: HJ-RMU Series Modular Ring Main Unit (Smart Integrated Edition)
Brand: HJATIS

The HJ-RMU Series Modular Ring Main Unit (Smart Integrated Edition) is a factory pre-wired distribution automation platform for 12kV to 24kV networks. It integrates primary switchgear (air, SF6, solid, or eco-gas) with DTU/FTU terminals and electronic sensors, providing SCADA-ready hardware. It supports multiple communication interfaces and protocols, with IP67 internal connections and a built-in backup battery.

Ask about this model →See ratings ↓

HJATIS

PUBLISHED PRODUCT DATA

Catalogue ratings and configurations.

The project data sheet should state the selected rating, options and site conditions.

Smart Integration Specifications

Smart Integration Specifications
Primary Equipment Compatibility
Compatible Base RMUs	Air-Insulated / SF6 Gas / Solid / Eco-Gas Platforms
Operating Voltage Range	12kV / 17.5kV / 24kV
Secondary Hardware & Sensing (DTU/FTU)
Terminal Unit Architecture	Modular Distribution Terminal Unit (DTU) / Feeder Terminal Unit (FTU)
Sensing Technology	Integrated Electronic Voltage/Current Sensors (EVT/ECT)
Measurement Accuracy	Voltage/Current: Class 0.5S ; Active/Reactive Power: Class 1.0
Hardware Comm. Interfaces	RS485, Ethernet (RJ45) standard / (Reserved slots for 4G/5G/LTE modules)
Supported Protocol Baseline	IEC 60870-5-101/104, Modbus-RTU/TCP, DNP3.0 / (Mapping & integration by local EPC)
Internal Connection Method	Heavy-duty IP67 aviation plugs (Pre-wired & Factory Tested)
Backup Power Supply	Built-in 24V/48V DC battery system (Maintains hardware comms during power loss)

CONFIGURATION

Select your configuration.

Tell us which ratings and options you need.

ParameterCatalogue indicationProject input required

01Operating Voltage Range12kV / 17.5kV / 24kVSpecify nominal system voltage (e.g., 12kV, 17.5kV, or 24kV).

02Measurement AccuracyVoltage/Current: Class 0.5S; Active/Reactive Power: Class 1.0Confirm required accuracy class for metering or protection.

03Communication InterfacesRS485, Ethernet (RJ45) standard; reserved slots for 4G/5G/LTESelect required communication modules and network topology.

04Supported ProtocolsIEC 60870-5-101/104, Modbus-RTU/TCP, DNP3.0Specify which protocols must be enabled for SCADA integration.

05Backup Power SupplyBuilt-in 24V/48V DC battery systemDefine backup duration and battery capacity requirements.

STANDARDS & REPORTS

Standards and product documents.

Applicable references: GB/T 3906 and IEC 62271-200. Ask for the edition and reports covering the model offered; a standard number alone does not confirm product compliance.

PRODUCT DOCUMENTSAsk about availability

Request drawings, data sheets and model-specific test reports.

Compare GB and IEC references ↗Your StandardBridge inputs and results are not attached to a sales enquiry automatically.

APPLICATIONS

Questions for your application.

Utility and industrial distribution

What are the feeder rating and fault level at the installation point? Send the protection scheme with the enquiry.

Renewable-energy collection networks

Will the device switch cables, transformers or other plant loads? State the switching duty and required control signals.

REQUEST A QUOTATION

Send the SLD, specification or BOQ.

Include the system voltage, fault level, service conditions and delivery scope for a model selection and document list.

Ask for a quotation →

HJ-RMU Series Modular Ring Main Unit (Smart Integrated Edition)

Smart Integration Specifications

Standards and product documents.

Utility and industrial distribution

Renewable-energy collection networks

HJ-AM Series (Air-Insulated Metal-Enclosed RMU)

HJ-Eco Series (Eco-Gas Insulated RMU)

HJ-GIS Series (SF6 Gas-Insulated RMU)

Send the SLD, specification or BOQ.