Parker 890SD - EMC CAPACITORS

Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D Page D-29
8
9
10
11
A
B
C
D
1
2
3
4
5
6
7
E
EMC CAPACITORS
SETUP::MISCELLANEOUS::EMC CAPACITORS
This block allows the user to disconnect the internal EMC "Y" capacitor (DC+ to earth and DC- to earth) from the drive earth
on 890 Frames B, C & D.
Parameter Descriptions
EMC CAPACITORS
PREF: 125.01 Default: 0 Range: See below
Electrically connects the internal EMC capacitors inside the product.
Enumerated Value : Internal EMC "Y " Capacitors
0 : CONNECTED Y caps connected to earth
1 : NOT CONNECTED Y caps disconnected from earth
Caution
Isolating the capacitors in this way will lower the input bridge's immunity to surges.
This will invalidate the EMC certification.
Reasons for Isolation
The drive's "Y" capacitors should be electrically isolated :
♦ when operating the drive on IT (non-earth referenced supplies)
♦ when operating the drive in a regenerative common dc link system (remove from all drives in the system)
♦ to prevent nuisance operation of earth leakage protection devices caused by earth leakage currents flowing in the supply