Saft Nickel Capacitor (SNC) High Power Module for Wayside Applications Saft Nickel Capacitor (SNC) modules, also known as asymmetric supercapacitors or ultracapacitors, are specifically designed for high power requirements SNC modules are extremely robust, high performance products that are unaffected by temperature extremes. The use of aqueous electrolyte provides for an extremely safe system that does not require any electronics. Features High power Maintenance-free ■■ Very long life ■■ Excellent safety ■■ Abuse resistant ■■ Very low self discharge ■■ Reliable and robust design with no electronics. ■■ ■■ SNC module Benefits Mechanical characteristics Length(mm) (in) Width (mm) (in) Height (mm) (in) Weight (kg) (lbs) Electrical characteristics Capacitance Rated voltage Maximum voltage Minimum voltage Internal resistance Max Current 1.5 s Energy stored within operating voltage window Energy stored within a typical starting voltage window Maximum operating power1 Leakage current2 Operating conditions Operating temperature range Storage temperature range Cycle life Asymmetric Nickel-Carbon design SNCs have more energy compared to symmetric supercapacitors due to the intrinsic two-fold increase in capacitance. ■■ Proven robustness and safety of alkaline technology The simple and rugged design is perfectly compatible with the road/rail environment. ■■ Durability and maintenance-free operation SNCs are designed to last the life of most heavy industrial equipment. ■■ Performances at very low temperature SNCs will provide enough power even at temperatures as low as -40°C. ■■ 1 2 SNC 12-1200 SNC 24-300 SNC 12-2000 SNC 24-500 369 14.5 181 7.1 215 8.5 21 46.4 369 14.5 181 7.1 215 8.5 21 46.4 396 15.6 206 8.1 270 10.6 28.5 62.9 396 15.6 206 8.1 270 10.6 28.5 62.9 1200 F 12 V 16 V 4V 0.003 Ω 1602 A 4 - 14.5 V 110 kJ 6.5 - 13 V 70 kJ 18 kW 20 mA 300 F 24 V 32 V 8V 0.009 Ω 1779 A 8 - 29 V 110 kJ 13 - 26 V 70 kJ 24 kW 10 mA 2000 F 12 V 16 V 4V 0.003 Ω 1602 A 4 - 14.5 V 190 kJ 6.5 - 13 V 120 kJ 18 kW 30 mA 500 F 24 V 32 V 8V 0.009 Ω 1779 A 8 - 29 V 190 kJ 13 - 26 V 120 kJ 24 kW 15 mA - 40 to 50°C (- 40 to 122°F) - 60 to 70°C (- 76 to 158°F) 300 000 Max power measured at rated voltage Leakage current measured after 48 hours at 14 V for the 12 V modules and 28 V for the 24 V modules Dedicated to high power wayside applications SNC modules are designed to provide the high power needed for switch machine operations. Typically the SNCs will work in conjunction with batteries and can be recharged from the 12 V battery circuit. This arrangement has several benefits: ■■ Optimizes and reduces the size of the batteries With SNC modules installed, a dedicated 24 V battery bank and charger are no longer required. The battery requirements for a typical control point, crossover or end of siding location can be reduced, along with the physical space requirements of the enclosure. ■■ Results in less space required The SNC modules and DC/DC converter require minimal space compared to traditional 24 V battery / charger systems. ■■ Allows multiple and continuous operations The SNC module is continually recharged from the existing operating battery through the DC/DC converter so that it is always ready for the next switch machine operation. ■■ Eliminates added maintenance Since the switch machine power comes from the SNC modules, which are maintenance-free, the amount of battery maintenance for each location is reduced. Example of a typical supercap interconnection diagram for switch applications Outside of bungalow + Switch Machine + – – SNC module + 28 V Output 24 V Nominal – Input 12 V DC/DC Converter + – 12 V Nominal Battery bank 12 V + 12 Volt charger – nThe existing operating battery will continually recharge the SNC module through the DC/DC converter. nSince the required energy to charge the SNC module is very small, even a nearly discharged battery can provide enough energy to charge the SNC. Saft Industrial Battery Group 12, rue Sadi Carnot 93170 Bagnolet - France Tel.:+33 1 49 93 19 18 Fax:+33 1 49 93 19 64 www.saftbatteries.com Doc No.: 21870-2-0313 Edition: March 2013 Data in this document is subject to change without notice and becomes contractual only after written confirmation. Société par Actions Simplifiée au capital de 31 944 000 € RCS Bobigny B 383 703 873 Produced in the UK by Arthur Associates Limited