Mors Smitt Railway Technology Miniature circuit breakers Hydraulic magnetic

MorsSmitt Railway Technology

Miniature circuit breakers Mors Smitt offers a wide range of railway hydraulic magnetic circuit breakers. The circuit breakers are fully configurable to meet the individual requirements. Precise, temperature stable mechanism, due to hydraulic magnetic technology Overcurrent sensing mechanism reacts only to changes of current No ‘warm-up’ period to slow down its response to overload. No ‘cooldown’ period after overload before it can be reset. Derating considerations due to temperature variations are not normally required and heat-induced nuisance tripping is avoided A common trip linkage between...

What makes a magnetic circuit breaker trip Time delays A wide range of time delays is available for optimal application compatibility. A wide range of accessories is availible for flexible connectivity. E.G. busbars and feeding terminals. Hydraulic magnetic Operation is precise and not affected by changes in ambient temperatures. Trip-free mechanism This safety feature makes it impossible to manually hold the contacts closed during over-current or fault conditions. Circuit options Mid trip (handle options) Several circuit options are available for easy adaption in any application. The handle...

Circuit options Available circuit options Series trip A basic two terminal device is usually used as a combination power switch and overload protector. the contacts and current sensing coil are connected in series with the line and load terminals (figure 1). Series trip with auxiliary switch Same as a series trip except with the addition of a S.P.D.T. snap-action switch, which is electrically isolated, but mechanically linked to the movement of the main breaker contacts. This switch is commonly used to remotely signal the status of the breaker (on or off / tripped) (figure 2). Series trip is...

Time delays Reference projects Customized solutions 10000 D.C. ULTRASHORT DELAY CURVE NO. 11 Perfect solutions TRIP TIME IN SECONDS The trip time of a hydraulic magnetic circuit breaker is directly related to the length of time it takes for the moving metal core to move to the full ‘in’ position. If the delay tube is filled with air, the core will move rather quickly, and the breaker will trip quickly. This is characteristic of the ultrashort delay curves (figure 1). Application examples: D.C. INSTANTANEOUS CURVE NO. 10 GFI (Ground fault detection) TRIP TIME IN SECONDS These curves have no intentional...

Reference projects Sub Surface Line (SSL) - London Together with Bombardier Transportation special electric power distribution panels (AC & DC) have been developed. A smart mechanical construction was designed for easy assembly and access under the seats in the train to optimize use of limited space. A construction was selected where the earth leakage module is combined with circuit breakers to guarantee optimum user safety. For this project (2009 - 2015) a total of 32.000 Mors Smitt circuit breakers are used SEPTA Philadelphia Especially for SEPTA Philadelphia Mors Smitt designed a solution...

Product range Panel mounting Up to 6 poles • • • • • • • Compact design Unique arc chute method which results in higher interrupting capacities Thermoset glass filled polyester halfshell construction for increased mechanical strength, electrical strength and to achieve highest level / rating on fire and smoke tests Standard blue housing and white handle to improve visibility Precise, temperature independent, operation Wide choice of time delays, terminal options and actuator colors The breakers can also be equipped with an optional mid-trip handle style actuator Physical characteristics Number...

Product range Panel mounting Up to 6 poles • • • • • • • • Unique arc chute design which results in higher interrupting capacities Thermoset glass filled polyester halfshell construction for increased mechanical strength, electrical strength and to achieve highest level/rating on fire and smoke tests Wiping contacts - mechanical linkage with two-step actuation – cleans contacts, provides high, positive contact pressure & longer contact life Standard blue housing and white handle to improve visibility Available with metric threaded stud terminals and american standard terminals The breakers can...

Product range 35 mm. rail mounting Up to 4 poles • • • • • • Integrated auxiliary change over contacts are optional (pre-mounted) 0.2 - 63 Amps Optional mid-trip handle style actuator Precise, temperature independant, operation Wiping contacts - mechanical linkage with two-step actuation – cleans contacts, provides high, positive contact pressure & longer contact life Standard blue housing and white handle to improve visibility Physical characteristics Line or load terminal: dual connection. Maximum wire size 35 mm2 flexible, 50 mm2 rigid. Busbar/tab connection thickness range 1.19 ~ 1.57 mm...

Product range Higher voltage & current Up to 6 poles • • • • • • • • • Ideal for higher amperage applications Available with front and back mounting Heavy duty box wire connector for solid wire and a pressure plate connector for stranded wire Unique arc chute design, which results in higher interrupting capacities Thermoset glassfilled polyester halfshell construction for increased mechanical strength, electrical strength and to achieve highest level / rating on fire and smoke tests Wiping contacts, mechanical linkage with two-step actuation, cleans contacts, provides high, positive contact pressure...

Product range Remote operated Up to 3 poles • • • • • • • • • On / off and trip indication Load shedding Energy management Compact size Automatic reset capable Choice of interface styles Panel mounting Manual operation override Fits into industry standard cut-out Interface options The RBR module allows remote operation of CR series panelmount breakers, (up to 3 poles) through hard wiring with a single pole, double throw switch connected to a standard power source, or more sophisticated relay and modem networks. Start current Switching time - Flying leads - Integral connector - Flying lead with...