IEEE 1726-2013 pdf download

01-15-2023 comment

IEEE 1726-2013 pdf download IEEE Guide for the Functional Specification of Fixed-Series Capacitor Banks for Transmission System Applications
bypass gap: A system of specially designed electrodes arranged with a defined spacing between them inwhich an arc is initiated to form a low-impedance path around one segment or a subsegment of the seriescapacitor bank. The conduction of the bypass gap is typically initiated to limit the voltage across the seriescapacitors and/or limit the duty to the varistor connected in parallel with the capacitors. The bypass gapincludes the electrodes that conduct the bypass current, the triggering circuit (if any), and an enclosure(See Figure 1.)
bypass switch: A device, such as a switch or circuit breaker, used in parallel with a series capacitor and itsprotective device to bypass or insert the series capacitor bank for some specified time or continuously. Thisdevice shall also have the capability of bypassing the capacitor during specified power system faultconditions. The operation of the device is initiated by the capacitor control, remote control, or an operator.The device may be mounted on the platform or on the ground near the platform. (See Figure l.)
capacitor element: The basic component of a capacitor unit consisting of two electrodes separated by adielectric.
capacitor rack: A frame that supports one or more capacitor units
capacitor unit: See power capacitor.
discharge current-limiting reactor: A reactor to limit the current magnitude and provide damping of theoscillatory discharge of the capacitors during a closing operation of the bypass switch or the start ofconduction of the bypass gap. (See Figure 1.)
discharge device: An internal or external device permanently connected in parallel with the terminals of acapacitor for the purpose of reducing the trapped charge after the capacitor bank is disconnected from thccncrgized power system.
external fuse (of a capacitor unit): A fuse located outside of the capacitor unit that is connected in serieswith the unit.
external line fault: A fault that occurs on adjacent lines or equipment other than on the transmission lincthat includes the series capacitor installation.
fixed-series capacitors (FSC): A series capacitor bank that has a reactance or reactances that are definedby the discrete reactances of the capacitors and are not variable.
forced-triggered bypass gap: A bypass gap that is designed to operate on external command on quantitiessuch as varistor energy, current magnitude, or rate of change of such quantities. The sparkover of the gap i:initiated by a trigger circui. After initiation, an arc is established in the power gap. Forced-triggered gapstypically sparkover only during internal faults.
fuseless capacitor bank: A capacitor bank without any fuses, internal or external, which is constructed of(parallel) strings of capacitor units. Each string consists of capacitor units connected in series
insertion: The opening of the capacitor bypass switch to insert the series capacitor bank in scrics with thline.
insertion current: The rms (roo-mean-square) current that flows through the series capacitor bank afterthe bypass switch has opened. This current may be at the specified continuous, overload. or swing currentmagnitudes.
insertion voltage: The peak voltage appearing across the series capacitor bank upon the interruption of thbypass current with the opening of the bypass switch.

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