Current Limiting Reactor, 2500 Continuous Amps, 480 VAC

65000 Available Amps, 14000 Fault Limit Amps, P/N KK-04

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 for 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

Notes:

A. CLR, 2500 Amps continuous, 480 VAC L-L, 65000 available Amps, 14000 Amps desired fault current, P/N KK-04
B. Copper windings
C. Approvals: none
D. System shipping weight: 2100 lbs. (three enclosures)
E. Calculated Inductance Value: 51.3 uH, 2500 Amps continuous
F. Three inductors in three separate enclosures (50″H x 50″W x 50″D)

The detail of one Air Core Inductor, KK-04A is shown below. Three KK-04A are required for one CLR KK-04.

 

KK-04A, Three are required per system

 

Notes:

    1. Air Core Inductor, P/N KK-04A
    2. L (1, 2) = 51.3 uH
    3. Continuous Current: 3000 Amps
    4. Frequency: 60 Hz
    5. Copper windings
    6. Approvals: None
    7. Copper bus bars are 4″ x 1/4″ thick with two holes
    8. One CLR consists of three separate air core inductors in three separate indoor enclosures

 

P/N KK-04 consists of five modules to offer 2500 Amps continuous. shown below is one module. Each module is capable of 500 Amps continuously.

 

 

Each KK-04A is housed inside an indoor enclosure. Three each of KK-04A make one CLR system KK-04

 

Notes:

1. (A), (B), (C) are 10-inch minimum

 

Three Air Core Inductors are housed in three separate enclosures:

 

One complete Current Limiting Reactor System, P/N KK-04

Consisting of three separate inductors in three separate enclosures

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.