MCR & MBR Medium Voltage Replacement Circuit Breakers ANSI 7.2/15kV at 500–1000 MVA, 1200-3000 Amperes Replacement breakers provide a costeffective way to upgrade your system capabilities while saving you from costly maintenance and lost productivity while preserving your investment in existing cubicles and cables. Why Siemens? Siemens Offers the Best Vacuum Circuit Breaker in the Industry. Superior Performance, Longer Service Life Siemens provides the experience your company needs to successfully extend the life of your equipment. Our circuit breakers are manufactured using the same fixtures as the original AllisChalmers and Siemens-Allis breakers. Standard Operator on All Siemens Replacement, Medium Voltage Distribution, and Outdoor Vacuum Circuit Breakers Reduced part count and inventory Minimized maintenance training required Why Replacement Breakers? 10,000 full load operation, 10-year maintenance cycle Extensive Replacement Breaker Experience – 750+ projects since 1983 Increased Reliability and Performance Reduced Operating and Maintenance Expenditures Over 300,0000 3AF/H series circuit breakers in service worldwide Reduced Downtime, Minimal Changeover Time During Upgrade Nuclear 1E Rated (350+ breakers) Design, Production Testing per ANSI, IEEE Preserved Investment in Existing Cubicles Improved Employee and Environmental Safety Full Range of Service Capabilities by Skilled Factory-Trained Engineers and Technicians 3AH Operator Features: Power Transmission & Distribution Spring charge motor mechanism lifetime lubricated gear box Operating linkage machine parts vs. stamped metal Change-out of components easily accessible Vacuum contact erosion indication easily verifiable Siemens Type MCR & MBR Medium Voltage Vacuum Circuit Breakers For Allis-Chalmers/Siemens-Allis Type MC/MCV & MB/MBV The following circuit breakers are available as pre-engineered designs. Replacement Circuit Breaker Nominal Voltage Class Nominal 3Phase MVA Maximum Class Voltage E Voltage Range Factor Full Wave Continuous Short Circuit Close and Interrupting Withstand Current Current Latch Time Test Voltage (60 Hz) (at max. kV) Capability K I 1.6 x KI kA rms Nominal Weights kV MVA kV rms Cycles kV Peak Amperes kA rms lbs. 7 MBR - 500 7.2 500 8.25 1.25 5 95 1200, 2000 33 66, 77 875 7 MBVR - 500 7.2 500 8.25 1.25 5 95 1200, 2000 33 66, 77 875 15 MCR - 500 13.8 500 15.0 1.3 5 95 1200, 2000 18 37, 58 860 15 MCVR - 500 13.8 500 15.0 1.3 5 95 1200, 2000 18 37, 58 860 15 MCU - 1000 13.8 1000 15.0 1.3 5 95 1200, 2000 37 77 1200 Dimensions (Inches) 7 MBR - 500 7 MBVR 500 15 MCR - 500 15 MCVR 500 15 MCU 1000 A 79.75 79.75 79.75 79.75 79.75 B 28.75 28.75 28.75 28.75 28.75 C 10.00 10.00 10.00 10.00 10.00 D 33.00 33.00 33.00 33.00 33.00 E 43.36 43.36 43.36 43.36 43.36 Sample Dimensional Diagram - MCR Contact Us To find out more about Siemens replacement breakers, please contact your local Siemens representative or (800) 347-6659 regarding your site specific application. Siemens Power Transmission & Distribution, Inc. Service Solutions Division 7000 Siemens Road Wendell, NC 27591 www.usa.siemens.com/energy © 2007 Siemens Power Transmission & Distribution, Inc. All rights reserved. E 5001-U610-XXXX-X-US00 Subject to change without notice. All statements, technical information and recommendations contained herein are based on information and tests we believe to be reliable. The accuracy or completeness hereof is not guaranteed. Since conditions of use are outside our control, the user should determine the suitability of the product for its intended use and assumes all risk and liability whatsoever in connection herewith.