Current Limiting Reactor, 250 Continuous Amps, 208 VAC L-L,

18000 Available Amps 5000 Fault Limit Amps, P/N KK-13

A current-limiting reactor is used when the prospective short-circuit current in a distribution or transmission system is calculated to exceed the interrupting rating of the associated switchgear. The inductive reactance is chosen to be low enough for an acceptable voltage drop during normal operation, but high enough to restrict a short circuit to the rating of the switchgear. The amount of protection that a current-limiting reactor offers depends upon the percentage increase in impedance that it provides for the system.

The main motive of using current-limiting reactors is to reduce short-circuit currents so that circuit breakers with lower short-circuit breaking capacity can be used. They can also be used to protect other system components from high current levels and to limit the inrush current when starting a large motor.

The customer application is shown below:

 

Current Limiting Reactor, Three Phase

Inductance Calculation

Specifications:

A. CLR, 250 Amps continuous, 208 VAC L-L, 18000 available Amps, 5000 Amps desired fault current, P/N KK-13
B. Copper windings
C. Approvals: none
D. System shipping weight: 600 lbs. (one enclosure)
E. Calculated Inductance Value: 61.1 uH, 250 Amps continuous
F. Three inductors in one enclosure (80″H x 60″W x 60″D)

The detail of one Air Core Inductor, KK-13A is shown below. Three KK-13A are required for one CLR KK-13.

 

 KK-13A. Three are required per system

Specifications:

  • Air Core Inductor, P/N KK-13A
  • L (1, 2) = 61.1 uH
  • Continuous Current: 250 Amps
  • Frequency: 60 Hz
  • Copper windings
  • Approvals: None
  • Copper bus bars are 1″ x 1/4″ thick with two holes
  • One CLR consists of three air core inductors in one indoor enclosure

P/N KK-13 consists of one module to offer 250Amps continuous. shown below is one module.

Three each of the P/N KK-08A inductors are housed inside an indoor enclosure as shown below:

 

The System consists of three inductors in one enclosure

 Three Inductors in one enclosure

All our CLRs are custom-built to order. To discuss your specific application, please call our phone number at (714) 624-4740, or send us an email at quote@lcmagnetics.com.