What is a 5% line reactor?
5% Impedance Line Reactor for the use of reducing input line distortion in Variable Frequency Drives helping to prevent damage to the components of the drive. Reduces input line distortion. Eliminates transient and overvoltage nuisance tripping. Provides excellent harmonic mitigation without adding capacitance.
How do you choose a line reactor?
Selecting a Line Reactor for VFD applications
- Insulation class – look for 200⁰ C insulation or better.
- Expect a minimum of a 115⁰ C heat rise.
- Ask for VPI (vacuum pressure impregnation) construction.
- Reactors should be designed for both line and load side use, with no de-rating.
What is a 3 phase line reactor?
Quite simply, a 3-phase line reactor is an inductor wired in series between two points in a power system. Reactors are simple electro-magnetic devices, some- times referred to as inductors.
When would you use a line reactor?
Line reactors should be used when:
- Line side is prone to surges, transients and harmonics.
- If VFD devices are being used in the circuit.
- Total Harmonic Current distortion (THID) drive exceeds 5%
- Turning on heavy-duty equipment or machines going through heavy loads.
What is the difference between a line reactor and a load reactor?
Load reactors are generally used with motors circuits (load side of a motor drive), while line reactors are used in power distribution (line side of a drive). The reason line/load inductors can limit current is based on a principle known as reactance.
Can a line reactor be oversized?
Not sizing the Line reactor for the drive rated HP: As mentioned in the section above, the effective impedance of line reactor depends on the current that is flowing in the circuit. If the reactor is oversized for the drive then it will not offer required impedance for harmonic control.
Can a line reactor be used as a load reactor?
Line reactors can protect the entire VFD from power system surges and transients. They also mitigate harmonic currents being drawn by the VFD. When a reactor is connected in series between the VFD and motors, it is referred to as a load reactor, which helps protect motors like an energy buffer.
Do I need line reactor?
Line reactors should be used when: Line side is prone to surges, transients and harmonics. If VFD devices are being used in the circuit. Total Harmonic Current distortion (THID) drive exceeds 5% Turning on heavy-duty equipment or machines going through heavy loads.
What is reactor volume?
A chemical reactor is an enclosed volume in which a chemical reaction takes place. In chemical engineering, it is generally understood to be a process vessel used to carry out a chemical reaction, which is one of the classic unit operations in chemical process analysis.
When should you use a line reactor?
What are the various reactor ratings?
Primary Functions of Current Limiting Reactors:
- The current-limiting reactors are used to perform the following functions:
- So they are used:
- Other ratings are given below:
- i. Continuous Rated Current:
- ii. Rated Short-Time Current:
- iii. Rated Voltage:
- iv. Short-Circuit Rating:
- v. Rated Over-Current Factor:
What is the difference between bus reactor and line reactor?
All Answers (5) Line Reactors are current-limiting devices suppressing rapid changes in current and limiting current surges. Shunt reactors which are used for controlling the bus voltage of sub station are known as bus reactors. They maintain bus voltage counteracting the over compensating effect of capacitance.
How do you calculate the capacity of a reactor?
Using bulk density and weight loaded in the reactor you can calculate the catalyst volume using density=mass/volume formula.
What is a line reactor used for?
Line reactors stabilize, or smooth, the current waveform, which reduces over voltage (or under voltage) line tripping and potential damage to the drive. They also protect the drive under motor short-circuit conditions by slowing the rate of rise of the current.