LR3 48-3/63 Block Line Reactor, 63 A, 3% Impedance, 480 V, 40 HP
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The Block LR3 48-3/63 is a 3 phase line reactor rated 63 A at 480 V with 3% impedance (0.35 mH per phase). Block USA's cross reference puts it on 40 HP drives at 480 V. It is UL 508 Listed and cULus marked, open frame (IP00), with copper windings and class F insulation. Applied Control is the Block manufacturers representative. Send the catalog number, or the drive HP, voltage and impedance you need, and the quote comes back the same business day.
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LR3 48-3/63 specifications
| Catalog number | LR3 48-3/63 |
| Manufacturer | Block Transformatoren-Elektronik (Block USA) |
| Series | LR3 line reactor, 3 phase |
| Rated current | 3 x 63 A AC |
| Linear current | 3 x 90 A AC |
| Inductance | 3 x 0.35 mH |
| Impedance (short circuit voltage) | 3% at 480 V |
| Rated voltage | 480 V (voltage range 0 to 690 V) |
| Frequency | 50 to 60 Hz |
| NEC HP at 480 V (Block USA cross reference) | 40 HP |
| Motor power, IEC (Block catalog) | 37 kW |
| Insulation class | F (155 C) |
| Protection | IP00, open core and coil, mount inside an enclosure |
| Ambient temperature | -10 to 40 C (14 to 104 F) |
| Terminals | Screw terminals for line and load, bolt connection for ground |
| Winding material | Copper |
| Dimensions (W x H x D) | 185 x 210 x 112 mm (7.28 x 8.27 x 4.41 in) |
| Weight | 8.07 kg (17.79 lb) |
| Standards and listings | UL 508 Listed, cULus, EN 61558-2-20, RoHS (EN IEC 63000) |
Specifications from the Block product page for LR3 48-3/63. Confirm against the current datasheet before installation.
Block datasheet for LR3 48-3/63 (PDF)
Cross reference for LR3 48-3/63
These 3% impedance, 480 V reactors cross to the LR3 48-3/63 on the Block USA cross reference table. Send any of these part numbers and we quote the Block part.
| Rockwell Automation 1321 | 1321-3R55-A |
| MTE | RL-05502 |
| TCI KDR | KDRULC1L |
| TCI KLR | KLRUL55ATB |
| Acme | ALRB-055TBC |
| Hammond Power | CRX0052BC |
The cross reference matches electrical ratings only. Check dimensions, mounting holes and terminal type before you swap a reactor in an existing panel.
3% or 5%?
A 3% reactor on the drive input cuts line notching and nuisance overvoltage trips and is the usual default. A 5% reactor cuts input current harmonics further and gives more protection when the supply is stiff or has capacitor switching upstream. On the output side, a reactor slows voltage rise at the motor on longer lead runs. Send the drive model and motor lead length and we will size it with you. See the Block collection, Rex Power Magnetics reactors, TECO AC drives and the cross reference hub.
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Rockwell Automation, Allen-Bradley, MTE, TCI, Acme and Hammond Power Solutions are trademarks of their respective owners. Applied Control Inc. is not affiliated with these companies. Competitor names appear only to identify products for comparison.