Line and load reactors are generally serial-connected to the input and/or output terminals of three phase equipment such as motor speed controllers, inverters and UPS systems. These equipment make use of semiconductor switches such as IGBTs, thyristors, and diodes and therefore create harmonic distortion and high switching over-voltages (dv/dt). Use of such equipment has been becoming more widespread as the technology advances. However, the negative effects of these equipment should not be overlooked.
By use of line and load reactors the adverse effects of using such equipment are decreased:
- Limited starting current
- Reduced motor noise
- Reduced motor temperature
- Reduced harmonic distortion
- Reduced motor heating
- Reduced switching over-voltages
- Easier selection of fuses as per nominal motor current
These reactors are designed in order to provide 4% voltage drop. Different voltage drop values are provided on demand.
All Hilkar line&load reactors are custom designed for different applications by considering the voltage, current, inductance, type of application, harmonics, interharmonics, size, transient events such as switchings, and loss characteristics that are required to provide the most efficient design at the most economical prices. All the routine tests are performed in accordance with IEC 60076-6 or other standards depending on customer request. Type test reports are available on request. All the test reports are submitted to customer. Basic testing program includes some or all of the following tests:
- Routine Tests (Inductance, Resistance, One Minute AC Insulation Voltage Withstand Test and Impulse Voltage Withstand Test)
- Short Circuit Withstand Test
- Temperature Rise Test
- Sound Level Test
- Seismic Test