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High-Voltage Centre Break Disconnectors 72.5 kV up to 420 kV Answers for energy.

Combining Forces Well-known Design meets Best Price-Performance Ratio Siemens is investing in research and development in order to manufacture the products you need now and will want in years to come. Decades of experience in high-voltage equipment go into the design and production of our products and set international trends. No matter what your application is, our high-voltage products provide the best solution for your requirements every time. With our high-voltage centre break disconnectors and earthing switches for rated voltages from 72.5 up to 420 kV, we fulfill customers‘ demands for reliability, safety and cost-effectiveness. By combining the strengths of our well proven product portfolio, we can provide this type of centre break disconnector. By using the well-known maintenance-free system from Ruhrtal, we took the best of what disconnector technology has to offer and designed a family of disconnectors especially for your specifications. We meet the high standard of quality that Siemens is known for combined with our customers‘ requirements for cost-effective disconnector products. With this centre break family, you have a reliable competitive solution with complete safety and peace of mind.

Highlights: Maintenance-free system without spring elements Approved technology applied in more than 40,000 units Type-tested according to IEC 62271-102 Rated current up to 3150 A, up to 50 kA – 3 sec Best price-performance ratio Test Con firm atio n

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The Centre Break Disconnectors from Siemens Our centre break disconnector family is available for rated voltages from 72.5 kV up to 420 kV. The centre break disconnector is the most frequently used disconnector type worldwide. The base frame (4) carries the compact operating mechanism (5) and two rotating base mounted ing insulators (2). In the closed position, the current flows via the current path arms (1), which are fixed to the insulators. The disconnector opens in the centre, thus providing an insulating distance. Each rotating unit (3) comprises two high quality sealed ball-bearings and is designed for high mechanical loads, therefore providing a maintenance free service life. These qualities result in low service and investment costs which provide our customers with competitive advantages worldwide.

1

2

3 4

5

1 Current path arms 2 ing insulators 3 Rotating unit 4 Base frame 5 Compact operating mechanism 3

The System The main system has been adopted from the well established range of Ruhrtal high-voltage disconnector products. This system consists of block s and spread fingers and assures a steady force even after decades of operation. The current flows in the head from the terminal (7) to the current path tube (6) through highly-flexible copper leads (8).

6

7

8

The most significant features are: Self-resilient fingers, no further spring elements necessary to generate the force Factory-set forces, no re-adjustments required during service life Ice layers up to 20 mm can be broken without difficulties Silver-plated surface providing highest conductivity without regular grease lubrication Maintenance-free system up to 25 years By using the well-established blockfinger system, we provide our customers with very practical advantages: smooth operation, exemplary availability and optimum security.

4

The Earthing Switch The use of earthing switches ensures absolute safety by grounding and discharging all high-voltage components in a circuit or switchgear. Suitable built-on earthing switches are available for the complete range of our centre break disconnector types from 72.5 up to 420 kV.

Three-pole centre break disconnector with earthing switch in inboard design

5

Motor Operating Mechanism

2 1

3

The motor operating mechanism includes all components required for operating the disconnector and consists of three main subassemblies: 1 Corrosion-resistant housing (protection degree IP 55) 2 Gear unit with motor 3 Electrical equipment with auxiliary switch The motor operating mechanism can also be operated manually by a hand crank which can be inserted inside the cubicle. The insertion of the hand crank automatically isolates the motor circuit for safety purposes. Heaters are provided to prevent condensation.

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Technical Data

High-Voltage Centre Break Disconnectors Rated voltage

Type 3DN1 [kV] 72.5

123

145

245

300

362

420

Rated power frequency withstand voltage

common value

[kV]

140

230

275

460

395

450

520



across isolating distance

[kV]

160

265

315

530

435

520

610

1050

1175

1425

Rated lightning impulse withstand voltage

common value

[kV]

325

550

650

1050



across isolating distance

[kV]

375

630

750

1200 1050 + 170 1175 + 205 1425 + 240

Rated normal current Rated short-time withstand current (1 s - 3 s) Temperature range

1250/1600/2000/2500/3150 A up to 50 kA -50 ... +50 °C

Rated frequency

50/60 Hz

Control voltage

110/125/220/250 VDC

Motor voltage

110/125/220/250 VDC or 230 VAC, 50 Hz/ 60 Hz

Values in accordance with IEC, other values on request

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For further Information

Please fax this page to the following number: Fax +49 30/386-25867

Name/Company

or send us an e-mail: [email protected]

Street Postal code/City/Country Phone/Fax E-mail Please send me more information on the following topics: Ruhrtal - Disconnectors and Earthing Switches High-voltage circuit-breakers: Type 3AP1/2, 72.5 kV to 550 kV High-voltage circuit-breakers for outdoor installation Live-tank and dead-tank high-voltage circuit-breakers technology High-voltage compact switchgear 3AP1 DTC for 145 kV and 245 kV Eliminate stress: Controlled switching of high-voltage circuit-breakers SF6 in power engineering - acting responsibly Further copies of this brochure

Published by and copyright © 2009

Siemens AG

Siemens AG

Energy Sector

Energy Sector

Power Transmission Division

Freyeslebenstrasse 1

High Voltage Products

91058 Erlangen,

Nonnendammallee 104 13629 Berlin,

www.siemens.com/energy

For more Information please our

www.hv-circuit-breaker.com

Customer Center.

Power Transmission Division Order No. E50001-G630-A146-X-4A00 Printed in Dispo-Stelle 30000 Mu. PA 11092.0 Printed on elementary chlorine-free bleached paper. All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its s, or their respective owners.

Phone: +49 180 524 7000

Subject to change without prior notice.

Fax: +49 180 524 2471

The information in this document contains general descriptions of the technical options available, which may not apply cases. The required technical options should therefore be specified in the contract.

(Charges depending on provider) Email: [email protected]