Current Limiting Reactor 21 uH, 700 Amps Continuous
P/N 18814CLR

The customer application is shown below. The CLR (current limiting reactor) consists of three gapped inductors inside one enclosure. The input power is 460 VAC, 3 PH, 60 Hz. Circuit breakers are supplied by the customer. A 5.5 volts drop is observed at 460 amps continuous current.

 

CLR, 700 AMPS CONTINUOUS, FAULT CURRENT 58000 AMPS , P/N 18814CLR Schematic Diagram

 

The Calculations of inductance value for 460 amps continuous and 58000 amps fault current are shown below:

Assuming 58000 Amps Fault Current, The Inductance Value is

  • V = 2 x pi x F x L x I (Fault Current)
  • L = 460 / (2 x pi x F x I (Fault Current))
  • L= 460 / (2 x 3.142 x 60 x 58000) = 21 uH

Voltage Drop Across The CLR At 800 Amps Continuous Is

  • V = 2 x pi x F x L x I (Continuous Current)
  • V = 2 x 3.142 x 60 x (21 x 10-6) x 700
  • V = 5.5 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
5.5 Volts 700 Amps
39.3 Volts 5000 Amps
78.6 Volts 10000 Amps
157.2 Volts 20000 Amps
235.8 Volts 30000 Amps
314.4 Volts 40000 Amps
393 Volts 50000 Amps
480 Volts 58000 Amps

 

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

 

CLR, 700 AMPS CONTINUOUS, FAULT CURRENT 58000 AMPS , P/N 18814CLR

 

Specifications:

  • Gapped Inductor, P/N 19016L
  • L (1, 2) = 21 uH ± 25 %, 700 Amps
  • Copper winding construction
  • Three inductor in one enclosure
  • Copper bus bar: 3” x ⅜” with 2 holes.
  • Indoor enclosure: 36”H x 28”W x 18”D

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

 

CLR, 700 AMPS CONTINUOUS, FAULT CURRENT 58000 AMPS , P/N 18814CLR

 

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.