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Ring Main Units (RMU)

HJ-GIS Series (SF6 Gas-Insulated RMU)

Name: HJ-GIS Series (SF6 Gas-Insulated RMU)
Brand: HJATIS

The HJ-GIS Series (HSRM16-12) is an SF6 gas-insulated ring main unit designed for compact secondary substations, heavy industrial networks, underground vaults, and coastal environments. All primary circuits are sealed in an IP67 stainless-steel tank, supporting long-term reliability. Available modules include load break switch, switch-fuse combo, and vacuum circuit breaker, with ratings up to 24kV and 1250A.

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HJATIS

PUBLISHED PRODUCT DATA

Catalogue ratings and configurations.

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

Module Technical Specifications Matrix

Module Technical Specifications Matrix
Technical Parameter	C-Module / (Load Break Switch)	F-Module / (Switch-Fuse Combo)	V-Module / (Vacuum Circuit Breaker)
Rated Voltage (Ur)	12kV (Up to 24kV)	12kV (Up to 24kV)	12kV (Up to 24kV)
Rated Current (Ir)	630A	125A	630A / 1250A
Power Frequency Withstand Voltage	42kV (Phase-to-Earth/Phase-to-Phase) / 48kV (Across open contacts)
Lightning Impulse Withstand (BIL)	75kV (Phase-to-Earth/Phase-to-Phase) / 85kV (Across open contacts)
Short-Time Withstand Current (4s)	20kA / 25kA	-	20kA / 25kA
Peak Withstand Current	50kA / 63kA	-	50kA / 63kA
Rated Short-Circuit Breaking Current	-	31.5kA (Fuse link limit)	20kA / 25kA
Active Load Breaking Current	630A	-	-
Cable Charging Breaking Current	25A	25A	25A
Mechanical Endurance (Operations)	5,000	5,000	10,000
Protection Degree (Tank / Enclosure)	IP67 (Gas Tank) / IP4X (Outer Enclosure)

Standard Dimensions

Standard Dimensions
Module Designation	W × D × H (mm)
C-Module / F-Module	500 × 950 × 1650
V-Module / PT-Module	400 × 950 × 1650

CONFIGURATION

Select your configuration.

Tell us which ratings and options you need.

ParameterCatalogue indicationProject input required

01Rated Voltage (Ur)12kV (up to 24kV)Specify system voltage (e.g., 12kV or 24kV).

02Rated Current (Ir)630A (C-Module), 125A (F-Module), 630A/1250A (V-Module)Select module type and required current rating.

03Short-Time Withstand Current (4s)20kA / 25kA (C and V modules)Confirm required short-circuit withstand level.

04Mechanical Endurance5,000 operations (C/F), 10,000 (V)Specify expected switching frequency.

05Protection DegreeIP67 (gas tank) / IP4X (enclosure)Confirm environmental exposure and enclosure 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 DOCUMENTSProduct documents available

Check the model and ratings in the documents below.

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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 report2019

HJ-GIS — Test report

Reported model HSRM16-12(F)/125-31.5

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

Report no.: 19Q2026-S
Test basis: GB/T 3906-2006 · GB/T 16926-2009 · GB/T 1985-2014

SF6-insulated switch-fuse unit; not a circuit-breaker rating.

42 pages·29.8 MB·English guide + Chinese original

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Test report2019

HJ-GIS — Test report

Reported model HSRM16-12(V)/630-25

12 kV / 630 A / 25 kA

Report no.: 19Q2032-S
Test basis: GB/T 3906-2006 · GB/T 1984-2014 · GB/T 1985-2014

SF6-insulated circuit-breaker unit; not a dry-air design.

49 pages·28.6 MB·English guide + Chinese original

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Test report2019

HJ-GIS — Test report

Reported model HSRM16-12(C)/630-25

12 kV / 630 A / 25 kA

Report no.: 19Q2033-S
Test basis: GB/T 3906-2006 · GB/T 3804-2017 · GB/T 1985-2014

SF6-insulated load-break-switch unit; not a dry-air design.

56 pages·39.2 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.