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Siemens Gas-Insulated Switchgear up to 145 kV, 40 kA, 3150 A Type 8DN8 Owner's Manual - User Guide

Summary

The Type 8DN8 Gas-Insulated Switchgear provides reliable, compact solutions for high-voltage power transmission and distribution up to 145 kV. This gas-insulated enclosure is renowned for its modular design, exceptional space savings, low weight, and suitability for sensitive environments due to minimal noise and EMC levels. The manual thoroughly details the technical specifications, operational principles, component configurations (circuit breakers, busbars), and flexible assembly options. It is essential reading for electrical engineers and infrastructure specialists seeking high-performance, durable substation equipment.

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Gas-Insulated Switchgear up to 145 k V, 40 k A, 3150 A Type 8DN8 Power Transmission and Distribution

Page Summary Contents For Siemens Gas-Insulated Switchgear up to 145 kV, 40 kA, 3150 A Type 8DN8 Owner's Manual - User Guide

Page 1 Gas-Insulated Switchgear up to 145 k V, 40 k A, 3150 A Type 8DN8 Power Transmission and Distribution
Page 2 Benefitting from Experience Our 8D type range of gas-insulated switchgear represents a highly successful product concept. Since its introduction back in 1968, Siemens has installed more than 17,000 ba...
Page 3 Both plug-in type and conventional cable- 8DN8 switchgear for sealing ends can be used rated voltages up to in conjunction with type 72.5 k V 8DN8 switchgear
Page 4 Flexible Due to Modular Design A fundamental feature of our gas-insulated switchgear All the modules are connected to one another by is the high degree of versatility provided by its modular means of ...
Page 5 Three-phase enclosure allows compact design 1. Integrated local control cubicle 2. Current transformer 3. Busbar II with disconnector and earthing switch 4. Interrupter unit of the circuit breaker 5. ...
Page 6 Circuit breaker module The central element of the gas-insulated switchgear is the three-pole circuit breaker module enclosure comprising the following two main components: Interrupter unit Operating m...
Page 7 Arc-quenching principle 1. Contact support 2. Nozzle Interrupter unit 3. Main contact The interrupter unit used in the circuit breaker for arc-quenching operates on the self-compression 4. Arcing cont...
Page 8 Schematic diagram Three-position switching device The functions of a disconnector and an earthing switch are combined in a three-position switching device. Neutral position The moving contact either c...
Page 9 High-speed earthing switch The high-speed earthing switch used is of the so-called “pin-type”. In this type of switch, the earthing pin at earth potential is pushed into the tulip-shaped fixed contact...
Page 10 Splitting modules, single-pole/three-pole The splitting modules are used for connecting three- pole plant components to single-pole components. As a rule, they form the connection between the outgoing...
Page 11 Termination modules The termination modules connect the bays of the gas-insulated switchgear to the following items of equipment: Overhead line Transformer or reactor coil Cable. They form the transit...
Page 12 Control and Monitoring – Consistent and Flexible Control and Protection Proven switchgear control Flexible and reliable protection in bay and substation control All the elements required for control a...
Page 13 Transport, Installation, Commissioning, Maintenance Transport Uncomplicated work procedures, detailed instal- lation instructions, and the use of relatively few To ensure optimal transport and on-site...
Page 14 Quality Assurance A consistent quality management system supported The quality management and environmental protection by our employees makes sure that we produce high systems cover every single proce...
Page 15 Coupling bay Typical asset arrangement with double busbar Typical Bay Arrangements All the standard circuit configurations can be realized using our type 8DN8 switchgear. Bay weight approx. 2.8 t Over...
Page 16 Technical Data Switchgear type 8DN8 Rated voltage 72.5 / 145 k V Rated frequency 50 / 60 Hz Rated power frequency withstand voltage (1 min) 140 / 275 k V Rated lightning impulse withstand voltage (1.2...
Page 17 For Further Information Phone: + 49 9131 / 7-3 46 60 Name/Company Fax: + 49 9131 / 7-3 46 62 E-mail: [email protected] www.hv-substations.com Street Zip code/City/Country Phone/Fax E-mail Please s...

Manual Details

Brand Siemens
Pages 17
File Size 1.51 MB
Published May 31, 2026
63 views

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Frequently Asked Questions

What is the maximum rated voltage for this switchgear?

The type 8DN8 switchgear meets requirements for rated voltages up to 145 kV.

Can this equipment be used in sensitive indoor environments?

Yes, because its levels of noise and field emission (EMC) are extremely low, it can be integrated into residential quarters and city centers.

How does the modular design improve flexibility for installation?

The fundamental feature of the gas-insulated switchgear is the high degree of versatility provided by its modular means, allowing all customary circuit variants to be possible.

What are the expected lifetime parameters of the system?

The expected working life is over 50 years, and the leakage rate per year in each gas compartment is limited to ≤ 0.5%.