Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 1 Design, Manufacture, Transport and Integration on-site in Chile of ALMA AntennasUPS Uninterruptible Power Supply PM# Jun 2006 First Page

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 2 Power Requirements Antenna UPS Power Requirements 15 KVA, 400 VAC, 50 Hz, 10 minutes UPS Dimensioning due to the critical environmental conditions and altitude requirements. 30 KVA, 400 VAC, 50 Hz, 10 minutes

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 3 Location Details UPS Main Unit (U1) UPS Batteries Unit (U2)

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 4 U1 Dimensions UPS Main Unit (U1) Dimensions 800 mm 900 mm 1200 mm

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 5 U2 Dimensions UPS Batteries Unit (U2) Dimensions 800 mm 1900 mm 968 mm

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 6 UPS Choise 1 UPS Baseline Proposal World Wide Group Brand

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 7 UPS Choise 2 UPS Choice Brand : Liebert Model :NX (30KVA,24KW)

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 8 UPS characteristics Liebert NX has: True on line with double conversion: It delivers 100% protection, full separation between Input and Output, Power regeneration. DSP Control : Digital Signal Processor supply full stability control in the years. Rectifier with sinusoidal absorption with PFC Vector Control (power factor correction). THD < 3%. Power Factor >= 0,99. Full tolerance to the grid floatation : from 305 to 477 V and from 40 to 70 Hz. Ripple < 5%.

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 9 UPS Batteries1 UPS Batteries - Baseline Proposal NorthStar NSB 40 High cycle life capability % DOD 10 Years float life at 25°C. 15 years at 20°C Flame retardant 3 step terminal seal

Reproduction interdite © ALMA EUROPEAN CONSORTIUM Reproduction forbidden Design, Manufacture, Transport and Integration in Chile of ALMA Antennas Page 10 UPS Batteries2 UPS Batteries 20 Hour capacity: 41Ah to 1.80 VPC 15 minut power: 194 W/cell to 1.67 VPC Float recharge Cyclic recharge °, no current limit NorthStar NSB 40