Current Limiting Reactor, 3000 Continuous Amps, 480 VAC L-L,

70000 Available Amps, 42000 Fault Limit Amps, P/N KK-06

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, 4000 Amps continuous, 480 VAC L-L, 70000 available Amps, 42000 Amps desired fault current, P/N KK-06
B. Copper windings
C. Approvals: none
D. System shipping weight: 1800 lbs. (three enclosures)
E. Calculated Inductance Value: 696 uH, 2500 Amps continuous
F. Three inductors in three separate enclosures (70″H x 70″W x 70″D)

The detail of one Air Core Inductor, KK-06A is shown below. Three KK-06A are required for one CLR KK-06.

 KK-06A, three are required per system

Specifications:

  • Air Core Inductor, P/N KK-06A
  • L (1, 2) = 14 uH
  • Continuous Current: 4000 Amps
  • Frequency: 60 Hz
  • Copper windings
  • Approvals: None
  • Copper bus bars are 4″ x 1/4″ thick with two holes
  • One CLR consists of three separate air core inductors in three separate indoor enclosures

P/N KK-06 consists of eight modules to offer 4000 Amps continuous. shown below is one module. Each module is capable of 500 Amps continuously.

 

Each KK-06A is housed inside an indoor enclosure. Three of KK-06A make one CLR system KK-06.

Notes:

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

 

The System consists of three inductors in three separate enclosures.

 

 Three Inductors in three enclosures

All our CLR’s 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.