LRM0250A-C Nidec Control Techniques

Product Description

LRM0250A-C

Input Line Reactor, 250A, 95uH, Chassis Mount (Non-Enclosed), 284 Watts Loss

Line reactors (sometimes called “line chokes”) are a common power accessory for electronic variable speed drives. These components add an extra margin of protection for AC drives from supply transients. Line reactors are strongly recommended for installation with AC drives that do not have built-in inductors. Refer to the built-in inductor columns in the following tables. Load reactors are used on the output of AC drives to reduce the effects of high motor wiring capacitance and to “soften” the dV/ dt (rate of change of voltage) applied to the motor windings.

Reactors in AC drive applications:

• Help reduce harmonic distortion of the input line current

• Improve input line current balance

• Reduce nuisance drive over-voltage trips caused by transient voltage spikes and power line notches    

• Protect input rectifiers from in-rush current caused  by sudden power line surges and sags

• Extend the life of the DC bus capacitor bank by reducing the internal heating caused by ripple current

• Protect motor windings from long lead effects when used on the drive output