Current Limiter


Also found in: Acronyms.

current limiter

[′kər·ənt ‚lim·əd·ər]
(electronics)
A device that restricts the flow of current to a certain amount, regardless of applied voltage. Also known as demand limiter.

Limiter, Current

 

(short-circuit current limiter), a device that prevents an increase of the short-circuit current in an electric circuit above permissible or specified amplitudes or effective values. A short-circuit current limiter can reduce the thermal and dynamic stability requirements for electric power transmission. In networks with voltages up to 35 kilovolts, the short-circuit current is limited by means of choke coils and, less frequently, fuses using a fine-grained filler or of the explosive type.

In the early 1970’s, both low-voltage and high-voltage lines were equipped with current limiters having thyristor switches, linear and nonlinear choke coils shunted by high-speed semiconductor switches, and nonlinear choke coils with magnetic biasing.

References in periodicals archive ?
Toukhy, "Fault ride-through enhancement of fixed speed wind turbine using bridge-type fault current limiter," Journal of Electrical Systems and Information Technology, vol.
But the features of the inductive current limiter, using an additional superconducting screen, have not been investigated.
"Fast transient faultcurrent detection based on PQR transformation technique for a solidstate fault current limiter," In Proc.
It can be seen that the circuit of the active current limiter holds the transistor in the linear region for the time necessary so that the parasitic capacitance is discharged; limiting the current through it to the value defined in (9), in this case a value very close to 8 A.
Azmy, "Improving fault ride-through capability of DFIG-based wind turbine using superconducting fault current limiter," IEEE Transactions on Applied Superconductivity, vol.
N., Optimum fault current limiter placement with search space reduction technique, " IET Gener.
Superconducting fault current limiters can limit short-circuit currents in power transmission and distribution grids very quickly, effectively, automatically and, thus, with a high degree of intrinsic safety, making reliable grid operation possible even under difficult conditions.
Study on control system of three-phase solid state fault current limiter, Automaiton of Eelcrtic Power Systems, 28 (7) 62-65.
Southern California Edison has a separate project to test another fault current limiter, designed by American Superconductor.
In one of these, SC Power Systems will develop a 138-kV saturable reactor type of fault current limiter (FCL).
Holtkoetter is also developing a proprietary electronic current limiter for its torchieres, which it will show at the June Dallas Market.
A higher wattage bulb does draw more current but in this case the bulb is being used as a current limiter in the circuit.

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