Current Limiting Reactor 400 Amps Continuous, 60.6 uH
P/N 6265CLR

The customer application is shown below. The CLR (current limiting reactor) consists of three gapped inductors inside one enclosure. The input power is 480 VAC, 3 PH, 60 Hz. Circuit breakers are supplied by the customer. A 9.1 volts drop is observed at 480 amps continuous current.

 

CLR, 400 AMPS CONTINUOUS, FAULT CURRENT 21000 AMPS , P/N 6265CLR Schematic Diagram

 

The calculations of inductance value for 400 amps continuous and 21000 amps fault current are shown below:

Assuming 21000 Amps Fault Current, The Inductance Value is

  • V = 2 x pi x F x L x I (Fault Current)
  • L = 480 / (2 x pi x F x I (Fault Current))
  • L= 480 / (2 x 3.142 x 60 x 21000) = 60.6 uH

Voltage Drop Across The CLR At 400 Amps Continuous Is

  • V = 2 x pi x F x L x I (Continuous Current)
  • V = 2 x 3.142 x 60 x (60.6 x 10-6) x 400
  • V = 9.1 Volts

The voltage drop across the CLR at different current levels is shown in Table A:

 

Table A

Voltage Drop Across The CLR Current Thru The CLR
9.1 Volts 400 Amps
22.8 Volts 1000 Amps
91 Volts 4000 Amps
182 Volts 8000 Amps
228 Volts 10000 Amps
342 Volts 15000 Amps
456 Volts 20000 Amps
480 Volts 21000 Amps

 

A photo of the inductor is shown below. Three inductors are required per system:

 

CLR, 400 AMPS CONTINUOUS, FAULT CURRENT 21000 AMPS , P/N 6265CLR

 

Specifications:

  • Gapped Inductor, P/N 6265CLR
  • L (1, 2) = 60.6 uH ± 25 %, 400 Amps
  • Copper winding construction
  • Copper bus bar: 2” x 1/4” with one hole
  • Three inductor in one enclosure
  • Temperature rise: 23°C
  • Indoor enclosure, 24”H x 18”W x 16”D

Three inductors are housed inside one enclosure. The photo of the enclosure is shown below:

 

CLR, 400 AMPS CONTINUOUS, FAULT CURRENT 21000 AMPS , P/N 6265CLR

 

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