Gas-insulated medium-voltage switchgear 8DJH - The one that fits all

Rated voltage up to

12 kV

Rated short-time withstand current up to 25 kA
Rated normal current up to 630 A
Single-busbar

Select which 8DJH Product you need for your application

Simply answer a few questions about the power requirements and specifications you need for your 8DJH product or multiple products to get the product number, technical drawings and brochure. With one click you can then send an enquiry into Siemens for a quick quote!

Product Selector

Product information 8DJH switchgear is a factory-assembled, type-tested, 3-pole metal-enclosed single-busbar switchgear for indoor installation. 8DJH switchgear is used in public and industrial energy systems of the secondary distribution level.

8DJH

- Up to 17.5 kV, 25 kA, 630 A busbar, 630 A feeder
- Up to 24 kV, 20 kA, 630 A busbar, 630 A feeder
- Metal-enclosed
- Gas-insulated
- Hermetically enclosed
- Factory-assembled, routine-tested according IEC 62271-200
- Type-tested according IEC 62271-200

Customer's Benefit:
- Security of Operation, Reliability
- Maintenance-free Design
- Personal Safety
- Environmental Independence
- Compactness
- Economy, Ecology

Technical Data

Rated voltage	kV	7.2	12	15	17.5	24
Rated short-duration power-frequency withstand voltage	kV	20	28	36	38	50
Rated lightning impulse withstand voltage	kV	60	75	95	95	125
Rated frequency	Hz	50/60	50/60	50/60	50/60	50/60
Rated normal current of busbar	A	630	630	630	630	630
Rated normal current of feeder	A	630	630	630	630	630
Rated short-time withstand current, 1 s	kA	25	25	25	25	25
Rated short-time withstand current, 3 s	kA	20	20	20	20	20
Rated peak withstand current	kA	63/65	63/65	63/65	63/65	50/52
Rated short-circuit making current	kA	63/65	63/65	63/65	63/65	50/52
Dimension - Width - Depth - Height	mm mm mm	310/430/500 775 1200/1400/1700	310/430/500 775 1200/1400/1700	310/430/500 775 1200/1400/1700	310/430/500 775 1200/1400/1700	310/430/500 775 1200/1400/1700

Design and Construction
Loss of service continuity category for panels or panel blocks: - Panels with disconnector (R, T, L) - Panels without disconnector (K, M)	LSC 2 LSC 1
Partition Class:	PM (Partition Metallic)
Accessibility of Compartments (enclosure): - Busbar compartment: - Switching-device compartment: - Low-voltage compartment (option): - Cable compartment for panels or panel blocks - with HV HRC fuses (T) - without HV HRC fuses (R, L, ...) - only cable feeder (K) - Metering panels (air-insulated) (M)	Non-accessible Non-accessible Tool-based Interlock-controlled Interlock-controlled Tool-based Tool-based

Internal arc classification (option)
Designation of the internal arc classification, IAC IAC class for - Wall-standing arrangement - Free-standing arrangement	Rated voltage 7.2 kV to 24 kV IAC A FL IAC A FLR
Type of accessibility A - F - L - R	Switchgear in closed electrical service location, access "for authorized personnel only" (according to IEC 62271-200) Front Lateral Rear (for free-standing arrangement)
Arc test current	up to 21 kA
Test duration	1 s

Future Distribution

The Future Distribution Substation from Siemens, with an integrated IoT connection, is Siemens solution for preparing your distribution grid for the challenges of the transition to a new energy mix. The smart secondary substation represents future-viable power distribution. It focuses on digitalization, decarbonization, and decentralization.

Medium- and low-voltage power grids need to handle changes due to the increasing integration of distributed infeed of renewable energy and growing electromobility in private transportation. While more and more of the necessary connection capacity can be provided through grid expansion, the effects of changing energy flow direction, load fluctuations, and voltage range compliance can only be managed with intelligent solutions.

Future Distribution Substation with Integrated IoT Connection

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iPDF-Future Distribution Substation

- Ring main unit – compact and communicative
- Sensformer® – a transformer with connectivity
- IoT connectivity
- Application of standardized IEC communication standards
- Sensor technologies and apps for condition monitoring and
distribution grid automation
- Innovative low-voltage components

Customer benefits:
- Future-proof functionality, consistently optimized in terms of
environmental friendliness and space saving
- High efficiency and low operating costs
- Modularity and flexibility of components
- Efficient grid and asset management thanks to IoT technology
- Monitoring and protection of power quality