Parker AC890 Product Manual page 326

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
Electrically connects the internal EMC capacitors inside the product.
Enumerated Value : Internal EMC "Y " Capacitors
Isolating the capacitors in this way will lower the input bridge's immunity to surges.
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
890SD Standalone Drive - Frames G, H & J
PREF: 125.01
0 : CONNECTED
1 : NOT CONNECTED
Caution
This will invalidate the EMC certification.
Default: 0
Y caps connected to earth
Y caps disconnected from earth
Range: See below
D-35
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