The customer application is shown below. The CLR (current limiting reactor) consists of three gapped inductors inside three separate enclosures. The input power is 13800 VAC, 3 PH, 60 Hz. Circuit breakers are supplied by the customer. A 151 volts drop is observed at 600 amps continuous current.
The Calculations of inductance value for 600 amps continuous and 55000 amps fault current are shown below:
Assuming 55000 Amps Fault Current, The inductance Value is
- V = 2 x pi x F x L x I (Fault Current)
- L = 13800 / (2 x pi x F x I (Fault Current))
- L= 13800 / (2 x 3.142 x 60 x 55000) = 665.4 uH
Voltage Drop Across The CLR At 600 Amps Continuous Is
- V = 2 x pi x F x L x I (Continuous Current)
- V = 2 x 3.142 x 60 x (665.4 x 10-6) x 600
- V = 151 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 |
| 151 Volts | 600 Amps |
| 252 Volts | 1000 Amps |
| 2520 Volts | 10000 Amps |
| 5040 Volts | 20000 Amps |
| 7560 Volts | 30000 Amps |
| 10800 Volts | 40000 Amps |
| 12600 Volts | 50000 Amps |
| 13800 Volts | 55000 Amps |
The details of each gapped inductor (front and side view) with enclosure are shown below:
Specifications:
- Gapped Inductor with enclosure, P/N 6440L
- L (1, 2) = 665.4 uH ± 25 %, 600 Amps
- Copper bus bars are 2 1/2″ x 13″ x 3/8” thick
- Six of 500 KCMIL compression lugs can be connected to each bus bar.
- Copper winding construction
- NEMA 3R Enclosure, 50″H x 36″W x 34″D
- Estimated weight of each gapped inductor inside the enclosure: 500 lbs
The CLR consists of three inductors. Each inductor is housed inside a separate indoor enclosure as shown below. Input/output cables can be from the top or the bottom of the enclosure.
All our current limiting reactors 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 info@LCMAGNETICS.COM.