NEX 24

1. NEX 24 24 kV switchgearMay 2010

2. ApplicationsNEX offer Range descriptionRemote control Continuity of service Agenda

3. Applications

4. A solution for MV primary substations • NEX 24 is present on all electrical distribution markets: • energy • infrastructure: hospitals, airports • industry: cement plants, water

5. Simplicity • NEX 24 for standard applications

6. Flexibility • NEX 24 closer to you • Proximity: • well-proven technical support • quick response to request for quotes and tenders • optimal solution with advanced characteristics • dedicated engineering • A complete range: • Circuit breaker • voltage transformers / current transformers • earthing switch • …

7. NEX 24 offer

8. Characteristics • Definition: • draw-out metal-enclosed switchgear functional units • indoor installation • air insulated cubicle (AIS) • Electrical data: • rated insulation voltage: 24 kV • lightning surge withstand: 125 kV peak • nominal current: 630 A to 2000 A • main circuit short-time withstand current: up to 25 kA 3s • earthing switch short-time withstand current:up to 25 kA 3s • internal arc withstand: up to 25 kA 1s ALFR

9. Characteristics • Vacuum breaking technology • 24 kV voltage level • Two cubicle widths for the range 2300 mm 800mm 1000mm

10. Performances kA 24 kV 50 40 31,5 25 NEX 24 16 A 630 1250 2000 2500

11. Installation parameters • Protection indexo IP3X - IP4X A B C D NEX 24 600 1 810 4000 600

12. Installation and connection type Top cable connection Bottom cable connection Top bar connection

13. NEX 24 complies with IEC 62271-200 standard • Safety of use for all against electrical, mechanical and thermal effects of a fault: • each compartment is insulated from the othersby metallic earthed walls • 3 compartments : • cable connection • circuit-breaker • busbar • Low Voltage cabinet

14. Standards conformity • NEX 24 range complies with international IEC 62271-200 standard governing metal-enclosed switchgear for AC current for rated voltages above 1kV and up to and including 52 kV • Standards: • IEC 60694 IEC62271-1 : Common clauses for HV switchgear • IEC 62271-200 (60298): AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52 kV • IEC 62271-100 (60056): HV AC circuit-breakers • IEC 60470: HV AC contactors • IEC 60265-1: HV switches • IEC 60282-2: HV fuses • IEC 62271-102 (60129): AC disconnector and earthing switch • IEC 60255: Measurement relay and protection device • IEC 60044-1: Current transformers • IEC 60044-2: Voltage transformers • IEC 60044-8: Electronic current transformers • IEC 60529 : Degrees of protection provided by enclosures • IEC 61958: Voltage Presence Indication Systems

15. Standards conformity • Normal operating conditions: • Indoor equipment • temperature -5 to +40°C • altitude  1000 m • humidity  95 % over 24 h  90 % over 1 month • Specific conditions: • Possibility to adapt equipment according to environmental requirements

16. An efficient and safe interface • All operations are carried out with the door closed • Access to live parts is impossible due to protective flaps • Voltage presence indicator • Position indicator linked to device physical position • Instructions in symbol form: • without text • Standardized symbols • Locking systems: • by padlock • by key-lock • electromagnetic

17. NEX 24 internal arc withstand performances Modèle Performance NEX 24 25kA 1s (AFLR)

18. Protection of operators and continuityof supply • Architecture based on safe access to compartments: • protection of operators in the event of internal arcing • complies with 5 criteria: • les correctly secure doors and covers do not open • no fragmentation of the enclosure occurs within the time specified for the test • arcing does not cause holes in the accessible sides up to a height of 2m • indicators do not ignite due to the effect of the hot gases • the enclosure remains connected to its earthing point • Satisfies continuity of supply requirements: • maintenance with power on (LSC2B) • secured access to compartments with power on thanks to separate busbarand cable compartments • the MV parts are compartmentalised by earthed metallic partitions and shutters

19. Ease of maintenance • Preventive and reduced maintenance • Sepam protection unit: • sum of currents broken • event memorisation • control circuit monitoring • self-monitoring • Simplicity of maintenance • Periodic simple operation checking • Cleaning and lubrication every 5 to10 years

20. Range description

21. A complete range • A cubicle for each function Load-break LB cubicle Feeder IF cubicle Coupling BC and RF(RW)cubicles Feeder IF cubicle Incomer IF cubicle Busbarearthing BM cubicle

22. Remote control

23. A built-in protection and monitoring chain • Sepam multi-function protection relay range: • series 20 Sepam for standard applications: • Current or voltage measurement • series 40 Sepam for advanced applications • All measurements: current and voltage, power, energy • series 80 Sepam for specific and customized applications • All measurements: current and voltage, power, energy • Sepam, a solution adapted to your operations: • Real time data comprising circuit-breaker status • Quick isolation of a failed network component and network configuration from the remote control centre

24. Instrument transformers • To supply protection, metering and monitoring devices • A full preferential current transformer range, harmonized with digital protection devices, to simplify determination of accuracy characteristics: ARJP, ARJH, ARJM ARJAtype current transformer VRS3 voltage transformer TLP 160 / 190current transformer

25. Voltage prescence indicator: an effective and safe interface • The VPIS (Voltage Presence Indicator System) is located on the front panel of the functional unit and in the immediate proximity of the earthing switch operating mechanism

26. Permanent monitoring NEX 24 Transparent Ready option: • Access to predefined Web pages containing information on: • Current, power, energy, history, … • Uses a simple Web server and the local TCP / IP network

27. Continuity of supply

28. Draw-out devices – circuit breaker

29. Vacuum breaking draw-out devices • Evolis circuit breaker • Evolis circuit breaker for cubicles IF and BC 24 kV / 2000 A • RI operating mechanism

30. The earthing and disconnector trucks Earthing truck • is a safety feature which allow the cubicles busbar to be earthed Disconnector truck • enables the upper and lower partof the cubicle to be short-circuited.

31. A guaranteed high level of availability • The result of experience of more than 2000 items of switchgear installed world-wide • Incorporation of innovating solutions designed from tried and tested equipment: • High performances breaking devices • Digital control, monitoring and protection chains • Enclosures able to withstand internal arcing

32. References the world over in all sectors of activity • Infrastructures • Hotel Méridien Bangalore (India) • New Airport of Bangkok (Thailande) • Sous-Station du port de Lattakia (Syria) • Energy • North Delhi Power Ltd (India) • Otway, Port campbell offshore extraction de gaz (Australie) • Raffinerie de pétrole Empresa (Colombie) • Technip Qatargas (Qatar) • Industry • Usine Hyflux de désalination d’eau (Singapour) • Station de Pompage d’eau Bir Hal Hacham (Syrie) • Mines d’or du nord de Mara (Tanzanie)

33. Eco-design and eco-produce • Eliminate sensitive substances • Facilitate treatment of products at end of life • Continuously enhance the environmental performance of production sites 97%of Schneider Electric industrial sites are ISO 14001 93% of global products are eco-designed

34. Conclusion • NEX 24 • Provides optimum continuity of supply • Proximity, flexibility • Facilitates and simplifies maintenance