BLOCKsignalling CDU2CFC High Capacity Capacitor Discharge Unit with Fast Charge at AJMRailways.com

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Shop Home | HO & OO Track, Points & Signals | HO/OO Points & Point Controls | BLOCKsignalling CDU2CFC High Capacity Capacitor Discharge Unit with Fast Charge

"Designed and manufactured in the UK using lead-free solder and renewable energy." Amanda		BLOCKsignalling CDU2CFC High Capacity Capacitor Discharge Unit with Fast Charge Ref: CDU2CFC in stock. $20.00 Shipping per unit: $1.50 Quantity: Product Details: BLOCKsignalling CDU2CFC High Capacity Capacitor Discharge Unit with Fast Charge Model railways which use points primarily use points motors which creates a linear movement of about 5mm (1/4in) of the blades of the points. To create this movement, the simplest device is the solenoid which consists of a coil of wire wound on a former. Inside the former is an iron actuator or slug which can be pulled into the coil when the power is applied. By placing two of these coils end-to-end, a forward and reverse motion can be created. But there are several problems with this arrangement. Point motors require a considerable amount of current for their operation. This means the full capacity of the transformer will be needed and any other items using the same supply will suffer voltage drop during the coil operation. The high currents can play havoc with switches. The back emf (reverse voltage) generated by the solenoid is sometimes sufficient to cause sparks and weld the switch closed. This will keep the current flowing through the solenoid and it will overheat very quickly. A Capacitor Discharge Unit (CDU) overcomes all these problems. CDUs supply a high current to the solenoid. This current burst is over by the time the switch contacts open, thus eliminating back emf across the switch contacts. Should a solenoid be left in circuit, the current flowing through it (after the initial surge) will be less than 50mA so it will not do any damage to the coil. The BLOCKSignalling CDU2C is designed for a larger layout, where now or in the future, you may wish to operate several points at the same time, and these may be some distance from the controller. Features: - Provides a high current pulse to operate points - Prevent points' motor burn-out by limiting subsequent current - Regulates charging current to prevent voltage fluctuations on the rest of the layout Each Unit comes with fitting instructions but to view these before purchasing please copy and paste the link below to your Internet Browser: http://www.blocksignalling.co.uk/pdfs/CDU.pdf

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BLOCKsignalling CDU2CFC High Capacity Capacitor Discharge Unit with Fast Charge

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