SJ-P1, WJ200, NE-S1 | |
SJ-P1, WJ200, NE-S1 | |
SJ-P1, WJ200, NE-S1 | |
SJ-P1, WJ200, NE-S1 | |
SJ-P1, WJ200, NE-S1 | |
SJ-P1, WJ200, NE-S1 | |
SJ-P1, WJ200, NE-S1 |
Countermeasure and equipment against noise vary depending on type of noise, source of generation and size of obstacle. It is important to take appropriate countermeasure for each situation. Please refer to "Hitachi inverter technical guide book, chapter of noise"
Type of noise | Propagation of noise | Major phenomenon |
---|---|---|
Radiation noise | Radiation noise in the air (1) Direct radiation noise (2) Radiation noise from power supply line (3) Radiation noise from main cable |
|
Conduction noise | Spreads through signal line and power supply line. (4) Conduction noise from power supply line (5) Conduction noise from earth cable |
|
Inducement noise | Spreads by electromagnetic induction and electrostatic induction (6) Inducement noise from strong type of electrocity to weak type of electrocity current system |
|
Function | Radiation | Conduction | Inducement | |
---|---|---|---|---|
Input side |
Input side AC reacter ALI | △ | △ | △ |
Radio noise filter ZCL-□ | ○ | △ | △ | |
Radio noise filter (condenser filter) CFI-□ | ○ | △ | △ | |
Input side noise filter(line filter) NF-□□□ | △ | ○ | ○ | |
Output side |
Output side AC reactor ACL | △ | △ | △ |
Radio noise filter ZCL-A | ○ | △ | △ | |
Output side noise filter (line filter) ACF-□□□ | ○ | ○ | ○ | |
Output side LCR Filter | ○ | ○ | ○ |
○ : effective △ : less effective
Also, as noise suppression shield line for wiring separation of main circuit and control circuit is reqeured.