Monarch nice3000 - Solutions to EMC Interference

NICE3000
new
User Manual 12 EMC
- 311 -
12
●
The cable ducts must be in good connection and well grounded. Aluminium ducts can be used to
improve electric potential.
●
The lter, controller and motor should be connected to the system (machinery or appliance)
properly, with spraying protection at the installation part and conductive metal in full contact.
For more cabling details, see section 3.2.
The following gure shows the recommended cabling diagram.
NICE3000
new
integrated
elevator
controller
Min. 200 mm
Min. 300 mm
Power cable
Motor cable
Min. 500 mm
Min. 500 mm
Regen. resistor cable
Motor cable
Power cable
90°
90°
90°
Control cable
Control cable
Power cable
Control cable
Control cable
12.8 Solutions to Current Leakage
The controller outputs high-speed pulse voltage, producing high-frequency leakage current during running
of the controller. Each controller produces above 100 mA leakage current. Therefore, it is necessary to
select an ELCB with rated operating current of 100 mA above.
The controller generates DC leakage current in protective conductor. In this case, a time-delay B-type
ELCB must be used. If multiple controllers are used, an ELCB must be provided for each controller.
The factors that inuence the leakage current are as follows:
●
Controller capacity
●
Carrier frequency
●
Type and length of motor cable
●
EMI lter
When the leakage current causes the ELCB to act, you should:
●
Increase the sensitivity current of the ELCB.
●
Replace it with a time-delay B-type ELCB with high-frequency suppression function.
●
Reduce the carrier frequency.
●
Shorten the length of the output cables.
●
Install a current leakage suppression device.
●
Use Chint Electric and Schneider brands.