ZRLC L.V. Passive Harmonic Filtering Device

Harmonic Filtering

General Introduction:

1,  ZRLC series of low-voltage passive filtering device is composed of multiple LC filtering braches encompassing filtering capacitor, filtering reactor, free-inductance resistor,which is connected in parallel to the power network with nonlinear load.

2,  All the filtering branches designs take key points into account including: the components and amount of harmonic and Var compensation. For the harmonic, each filtering branch works the same as the low-resistance route way, making most relevant harmonic flow into this branch. In this way, the filtering gets done and also the voltage common point and current distortion get less. Besides this, the device can supply the power system with capacitive Var power to enhance power factor of the power system.

3,  The equipment can be used for voltage1kVor below, with capacity ranging from dozens of kilovar to thousands of kilovar.

Main performance characteristics

1, Professional simulation calculation, design, check, to optimize the device design

2, Tailor-made filtering reactor and good-quality filtering capacitor adopted

3, Functions to keep the harmonic from increasing, and avoid resonance with power system available

4, Simple structure, low investment, reliable operation performance and low-cost maintenance

5, Well-developed protection for the following: over-current, quick break and so on.

Main technical parameters

_____________________________________________________________________

Rated voltage                            0.4~1kV                                                             

Rated frequency                          50Hz/60Hz                                                       

Harmonic filtering                    5^th, 7^th, 11^th, 13^th or above(based on contents of harmonic)

Filtering efficiency                     More than 70% of harmonic eliminated

Power factor                                  >0.90                                                             

Var compensation                       Power factor extends 0.92                                  

Duty class                                     Continuous                                                     

Structure style                                Cabinet,                                                        

Ambient temperature                         -10~+40                                                      

Relative humidity                            Max. 85%, no condensing                               

Altitude above sea level                        Below 1000m                                            

Note: Any special conditions, please consult us.

Parameters required for design

1, Power system drawing and parameters: rated voltage of power system, work voltage and so on.

2, Points of common connecting (PCC) short-circuit capacity, power-supply protocol capacity, power-consumption protocol capacity

3, Parameters of load and work condition

4, Amount of harmonic generated

5, Active power factor, natural power factor and target power factor

6, Mounting requirements and cable arrangement

Note: Full-scale assessment on the users power system will be performed by SSE upon request, and optimal scheme will also be proposed as well.