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A silicon-controlled switch (SCS) behaves nearly the same way as an SCR; but there are a few differences. Unlike an SCR, an SCS switches off when a positive voltage/input current is applied to another anode gate lead. Unlike an SCR, an SCS can be triggered into conduction when a negative voltage/output current is applied to that same lead.
In general, the SCR unit is located between the furnace economizer and the air heater, and the ammonia is injected into the catalyst chamber through an ammonia injection grid. As in other SCR applications, the temperature of operation is critical. Ammonia slip (unreacted ammonia) is also an issue with SCR technology used in power plants.
South Central Railway (abbreviated SCR) is one of the 19 zones of Indian Railways. [1] The jurisdiction of the zone is spread over the states of Andhra Pradesh, Telangana, Maharashtra, Karnataka. [2] It has three divisions under its administration, which include Secunderabad, Hyderabad and Nanded. Secunderabad, Telangana is the Zonal ...
Ruf SCR, a sports car manufactured by German automobile manufacturer Ruf Automobile; Scandinavian Mountains Airport (IATA: SCR), Dalarna, Sweden; Siler City Municipal Airport (FAA LID: SCR), Siler City, North Carolina; Smyrna Cassaba Railway, an Ottoman railway; South Central Railway in India; South Coast Rail, a future MBTA Commuter Rail line
This method may take significant time before the SCR exhaust cleaning system is fully operational, often up to an hour. [4] Another method to thaw DEF (and thus allow for full SCR operation) is to integrate an electric heater into the DEF tank. This heater must be sized, positioned, and powered adequately to rapidly melt sufficient frozen DEF.
S.C.R. (or SCR) — Supreme Court Reports (Supreme Court of Canada) S. Ct. — Supreme Court Reporter (Supreme Court of the United States) S.E. — South Eastern Reporter; S.E.2d — South Eastern Reporter, 2nd Series; SCOTUS — Supreme Court of the United States (Supreme Court of the United States) SI — Statutory instruments; S/J ...
The SCR can be calculated for each point on an electrical grid. A point on a grid having a number of machines with an SCR above a number between 1 and 1.5 has less vulnerability to voltage instability. Hence, such a grid is known strong grid or power system. A power system (grid) having a lower SCR has more vulnerability to grid voltage ...
low SCR: in case of a short circuit, the current is proportional to SCR, therefore generators with low SCR require less protection and thus are cheaper; low SCR allows shorter air gap and lower excitation field, both decreasing the size (an cost) of the generator; with low SCR the amounts of iron and copper are reduced, lowering the cost; high SCR: