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

Name: HJ-AM Series (Air-Insulated Metal-Enclosed RMU)
Brand: HJATIS

The HJ-AM Series Air-Insulated Metal-Enclosed RMU is designed for secondary medium-voltage distribution up to 24 kV. It uses ambient air as the main insulation medium, with SF6 load break switches or vacuum circuit breakers for switching.

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
Electrical Parameters
Rated Voltage (Ur)	12kV / 17.5kV / 24kV (Custom configurations available)
Rated Frequency	50 Hz / 60 Hz
Rated Main Busbar Current	630A / 1250A (Higher ratings upon request)
Short-Time Withstand Current (Icw)	20kA / 25kA (3s)
Lightning Impulse Withstand (BIL)	75 kV / 95 kV / 125 kV (Varies by rated voltage)
Power Frequency Withstand Voltage	42 kV / 50 kV (1 min, varies by rated voltage)
Mechanical & Physical Properties
Insulation Medium	Ambient Air (Main Cubicle) + SF6/Vacuum (Switching Core)
Enclosure Protection Degree	IP3X (Outer Enclosure)
Standard Depth (D)	918 mm
Standard Width (W)	375 mm / 500 mm / 750 mm (Depending on circuit type)
Standard Height (H)	1400 mm / 1600 mm (Single-core cable) / 1800 mm (Three-core cable)
Standards referenced in the source catalogue	IEC 62271-200

CONFIGURATION

Select your configuration.

Tell us which ratings and options you need.

ParameterCatalogue indicationProject input required

01Rated Voltage (Ur)12kV / 17.5kV / 24kV (Custom configurations available)Specify required rated voltage (e.g., 12kV, 17.5kV, 24kV).

02Rated Main Busbar Current630A / 1250A (Higher ratings upon request)Specify required busbar current (e.g., 630A, 1250A).

03Short-Time Withstand Current (Icw)20kA / 25kA (3s)Specify required short-time withstand current (e.g., 20kA, 25kA).

04Enclosure Protection DegreeIP3X (Outer Enclosure)Confirm if IP3X is acceptable for installation environment.

05Standard Width (W)375 mm / 500 mm / 750 mm (Depending on circuit type)Specify circuit type to determine width (e.g., 375mm for certain configurations).

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 DOCUMENTSProduct documents available

Check the model and ratings in the documents below.

View documents ↓

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.

TECHNICAL LIBRARY

Product documents

Check the tested model and ratings before using a report for your project.

All documents

Test report2017

HJ-AM — Test report

Reported model HXGN[ ]-12/125-31.5

12 kV / 125 A / 31.5 kA switch-fuse duty

Report no.: 17Q2389-S
Test basis: GB 3906-2006 · GB 16926-2009

125 A switch-fuse unit. The 31.5 kA breaking duty must not be assigned to a 630 A load-break switch.

40 pages·28.3 MB·English guide + Chinese original

Download PDF Open PDF

Test report2017

HJ-AM — Test report

Reported model HXGN[ ]-12/630-20

12 kV / 630 A / 20 kA

Report no.: 17Q2390-S
Test basis: GB 3906-2006 · GB 3804-2004

630 A load-break-switch unit. This report does not establish an internal-arc classification.

52 pages·25.8 MB·English guide + Chinese original

Download PDF Open PDF

The English guide is prepared by HJATIS; it is not a laboratory translation or an IEC certificate. Results apply to the tested sample and configuration. The original report and its stated standard editions govern.