alternating current circuits

См. также в других словарях:

• Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …   Wikipedia

• Current transformer — A CT for operation on a 110 kV grid In electrical engineering, a current transformer (CT) is used for measurement of electric currents. Current transformers, together with voltage transformers (VT) (potential transformers (PT)), are known as …   Wikipedia

• Residual-current device — A two pole residual current device A Residual Current Device is a generic term covering both RCCBs and RCBOs. A Residual Current Circuit Breaker (RCCB) is an electrical wiring device that disconnects a circuit whenever it detects that the… …   Wikipedia

• Electric current — Electromagnetism …   Wikipedia

• Traction current line — A traction current line is a high voltage transmission line for the supply of railways with traction current for powering locomotives. A network of traction current lines is needed in countries where trains use single phase alternating current of …   Wikipedia

• Direct current — (red curve). The horizontal axis measures time; the vertical, current or voltage. Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by such sources as batteries, thermocouples, solar cells, and… …   Wikipedia

• Traction current pylon — A traction current pylon is a railroad pylon carrying at least one circuit for traction current. In Germany for traction current lines with two systems (4 conductor cables) as a rule pylons with single level arrangement of the conductor cables… …   Wikipedia

• High-voltage direct current — HVDC or high voltage, direct current electric power transmission systems contrast with the more common alternating current systems as a means for the bulk transmission of electrical power. The modern form of HVDC transmission uses technology… …   Wikipedia

• electric current — Elect. the time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time: measured in amperes. Also called current, electricity. [1830 40] * * *… …   Universalium

• Inrush current — or input surge current refers to the maximum, instantaneous input current drawn by an electrical device when first turned on. For example, incandescent light bulbs have high inrush currents until their filaments warm up and their resistance… …   Wikipedia

• Conditional short circuit current — is defined as the value of the alternating current (a.c) component of a prospective current, which a switch without integral short circuit protection, but protected by a suitable short circuit protective device (SCPD) in series, can withstand for …   Wikipedia