CRM 440 seriesTHREE-PHASE CAPACITORS FOR LV FIXED POWER FACTOR CORRECTION
High reliability and complete working security are the main characteristics of CMR series capacitors.
Reliability is guaranteed by the use of a special metallised dielectric and by severe process controls. CMR capacitors use metallized PP film.
Security is guaranteed by a complete range of devices:
Internal Overpressure Device, this device operates in case of internal short circuit by disconnection of the internal connections.
Discharge resistors. The function of the discharge resistors is to reduce the voltage between terminals of the capacitor to levels prescribed in the following Specifications EN 60831/1-2 and IEC 831/1-2.
If capacitors are used as part of an automatic assembly, where a large number of switching cycles are possible, the inrush current
must be limited to appropriate level, by using of suitable dumping inductors. The alternative to chokes is the using of special contactors designed for use with capacitors and provided with dumping resistors.
Self-extinguishing plastic is used for CMR external case, IP40.
The provided parallel connection bars are suitable to connect in parallel some CMR up to a maximum total current of 72Amps.
The CMR three-phase capacitor for low voltage Power Factor Correction complies with the following Standards: EEC 89/336 Standards (amended by EEC 92/31 – EMC) and EEC 73/232 Standards (amended by EEC 96/3 – Low Voltage).
|Dielectric||Metallized polypropylene film|
|Rated voltage||440 Vac|
|Rated frequency||50 Hz|
|Power tolerance||-5% + 10%|
|Dielectric losses||< 0,30 W/KVAr|
|Working ambient temperature||-25°C + 45°C|
|Max over voltage||1,1 Un (according to IEC)|
|Max over current||1,3 In|
|Max inrush current||100 In|
|AC test voltage between terminals||2,15 Un for 2 sec.|
|AC test voltage between case/terminals||3 kV for 10 sec.|
|Insulation level||3/15 KV|
< 3 minutes with residual voltage 75V
|Internal connection||Delta three-phase|
Internal overpressure disconnector
|Filling||Oil filling, without PCB|
|Service type||Continuous, indoor|
|Protection degree||IP 40|
Vertical preferable for better cooling
|Service life||60.000 hours|
|Reference standards||CEI EN 60831-1/2 IEC 831-1/2|
|50 Hz||Power||Current||Capacitance||Weight||Discharge time (10% Un)|