Current Limiting Reactor, 4000 Continuous Amps, 13800 VAC L-L,

63000 Available Amps, 55000 Fault Limit Amps, P/N KK-18

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

Specifications:

A. CLR, 4000 Amps continuous, 13800 VAC L-L, P/N KK-18
B. Inductance value: 189 uH
C. Each inductor in separate enclosure (80″H x 80″W x 80″D)
D. Each enclosure with inductor: 1300 lbs., three are required
E. Copper windings
F. Approvals: none
G. Total system weight: 3900 lbs.

The detail of one Air Core Inductor, KK-18A is shown below. Three KK-18A are required for one CLR KK-18.

Specifications:

  • Air Core Inductor, P/N KK-18-1
  • L (1, 2) = 189 uH
  • Continuous Current: 4000 Amps
  • Frequency: 60 Hz
  • Copper windings
  • Approvals: None
  • Copper bus bars are 6″ x 1/2″ thick with one hole
  • One CLR consists of three separate air core inductors in three separate indoor enclosures

 

P/N KK-18-1 consists of eight 500 Amp modules to offer 4000 Amps continuous. shown below is one module.

 

Each KK-18-1 is housed inside an indoor enclosure as shown below. Eight 500 Amps modules stacked
vertically to build a 4000 Amps inductor.

 

 

Notes:

1. (A), (B), (C) are 10-inch minimum
2. Each enclosure with inductor: 1300 lbs.

 The System consists of three inductors in three separate 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.