HJ-CSS Series Compact Secondary Substation

Name: HJ-CSS Series Compact Secondary Substation
Brand: HJATIS

The HJ-CSS Series Compact Secondary Substation is a factory-assembled unit combining MV switchgear, a distribution transformer, and LV distribution panels in a modular enclosure. It supports voltages up to 40.5kV and transformer capacities from 50kVA to 2500kVA. Designed for space-constrained applications, it reduces on-site civil works and deployment time. Suitable for urban distribution, industrial parks, renewable energy integration, and infrastructure projects.

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.

Technical Specifications

Technical Specifications
System & Power Parameters
Transformer Capacity	50kVA - 2500kVA / (Custom larger capacities available via E-House)
Rated Voltage (MV Side)	12kV / 24kV / 35kV (Up to 40.5kV)
Rated Voltage (LV Side)	0.4kV / 0.69kV
Rated Current (MV Side)	Up to 630A (Load Switch) / 125A (Fuse) / 1250A (VCB)
Rated Current (LV Side)	100A - 3150A
Withstand & Protection Ratings
Short-Time Withstand Current (MV)	20kA (Standard) / (Custom higher withstand available)
Short-Circuit Breaking Current (LV)	15kA - 80kA
Rated Frequency	50 Hz / 60 Hz
Transformer Type Options	Hermetically Sealed Oil-Immersed / Cast Resin Dry-Type
Enclosure Protection Degree	Standard IP3X (Transformer Compartment IP2X) / (Customizable up to IP54 for extreme environments)

CONFIGURATION

Select your configuration.

Tell us which ratings and options you need.

ParameterCatalogue indicationProject input required

01Transformer Capacity50kVA - 2500kVASpecify required kVA rating

02Rated Voltage (MV Side)12kV / 24kV / 35kV (up to 40.5kV)Specify system voltage

03Rated Voltage (LV Side)0.4kV / 0.69kVSpecify LV voltage

04Short-Time Withstand Current (MV)20kA (standard)Specify required withstand rating

05Enclosure Protection DegreeIP3X standard (transformer compartment IP2X), customizable up to IP54Specify environmental conditions

STANDARDS & REPORTS

Standards and product documents.

Applicable references: Project specification and IEC equipment standards. 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.

Renewable power plants

Where does the package connect to the plant and the grid? Send the single-line diagram with the supply limits marked.

Remote industrial sites

How will the modules reach the site? Share route, lifting and space limits before the layout is agreed.

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 →