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Current Limiting Reactor 101 uH, 57 Amps Continuous P/N 18786CLR
FromL/C Magnetics
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, 400 Hz. Circuit breakers are supplied by the customer. A 14.5 volts drop is observed at 480 amps continuous current.
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The Calculations of inductance value for 480 amps continuous and 1900 amps fault current are shown below:
Assuming 1900 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 400 x 1900) = 101 uH
Voltage Drop Across The CLR At 57 Amps Continuous Is
- V = 2 x pi x F x L x I (Continuous Current)
- V = 2 x 3.142 x 400 x (101 x 10-6) x 57
- V = 14.5 Volts
Voltage Drop Across The CLR : Current Thru The CLR
14.5 Volts : 57 Amps
25.4 Volts : 100 Amps
50.8 Volts : 200 Amps
127 Volts : 500 Amps
230.2 Volts : 800 Amps
254 Volts : 1000 Amps
381 Volts : 1500 Amps
480 Volts : 1900 Amps
- Gapped Inductor, P/N 18786L
- L (1, 2) = 101 uH ± 25 %, 57 Amps
- Copper winding construction
- Copper bus bar: 1/8” x 5/8” with one hole
- RDC = 0.00155 ohms
- Calculated core loss: 27.5 watts
- Calculated copper loss: 5 watts
- Temperature rise: 35°C
- Indoor enclosure, 20”H x 16”W x 9”D