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KB009
KB009

... The basic objectives in selecting capacitor fuses are twofold: 1. The fuse must be capable of withstanding steady state and transient currents in order to avoid spurious fuse operations. 2. The fuse must effectively remove a failed or failing capacitor unit from service without causing further damag ...
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Design of a single phases AC-AC
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... MOSFET technology's benefit over BJTs, is lower gate current (base current for BJT is large compared to almost zero for Mosfet gate current). Since the Mosfet is a depletion channel device, voltage, not current is necessary to create a conduction path from drain to source. The gate does not contribu ...
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... converters enter a low power mode at light load for maximum efficiency across the widest possible range of load currents. The converters can be forced into fixed frequency PWM mode by pulling the MODE pin high. The TPS65024x also integrate two general purpose 200mA LDO voltage regulators, which are ...
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... Vaasa. Wärtsilä in Vaskiluoto is an engine laboratory. The engine laboratory tests different engines before they are put in the engine portfolio. There are several switchgears at the laboratory for load banks, generators and frequency converters. New switchgear will be installed for a new project. T ...
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Mercury-arc valve



A mercury-arc valve or mercury-vapor rectifier or (UK) mercury-arc rectifier is a type of electrical rectifier used for converting high-voltage or high-current alternating current (AC) into direct current (DC). It is a type of cold cathode gas-filled tube, but is unusual in that the cathode, instead of being solid, is made from a pool of liquid mercury and is therefore self-restoring. As a result, mercury-arc valves were much more rugged, long-lasting and could carry much higher currents than most other types of gas discharge tube.Invented in 1902 by Peter Cooper Hewitt, mercury-arc rectifiers were used to provide power for industrial motors, electric railways, streetcars, and electric locomotives, as well as for radio transmitters and for high-voltage direct current (HVDC) power transmission. They were the primary method of high power rectification before the advent of semiconductor rectifiers, such as diodes, thyristors and gate turn-off thyristors (GTOs) in the 1970s.
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