GE Industrial Solutions AF-300C AC Drive - Manual (Page 41)

AF-300C GEK-85716
Surge Suppressor Connection
When a magnetic coil actuated device such as a
starter, control relay, solenoid valve, etc., opens and
closes, the current will sharply fluctuate resulting in a
voltage
spike (or noise). In some instances this
voltage spike can cause misoperation of the electri-
cal circuits of the inverter and other peripheral equip-
ment. A surge suppressor should be connected
across all magnetic coils connected to the inverter, as
well as across all magnetic coils with supply wiring
running parallel with inverter wiring. Wiring should be
kept as short as possible (8 inches cm] maxi-
mum). See Figure 4-14 for connection methods and
thefollowing chart for recommended RC Filter capac-
ity.
Magnetic Contactor (DC)
Main Circuit (AC)
Auxiliary Relay (DC)
Auxiliary Relay (AC)
Solenoid Brake (DC)
Braking Clutch
Surge Suppressor (RC Filter) Application
RC Filter or Diode
0.2 microfarad, 5 0 0 VDC Capacitor; 500 O h m Resistor or diode*.
0.2 microfarad, 5 0 0 VDC Capacitor; 500 O h m Resistor.
0.1 microfarad, 5 0 0 VDC Capacitor; 500 O h m
Resistor or diode*.
0.2 microfarad, 5 0 0 VDC Capacitor; 500 O h m Resistor.
0.2 microfarad, 500 VDC Capacitor; 500 Ohm Resistor or diode*.
0.2 microfarad, 500 VDC Capacitor; 500 O h m Resistor.
*Diode to be used only when the current of the operating coil is no more #an Amp.
I
DC
M a g n e t c a c t o r
Figure 4-14. SUPPRESSOR CONNECTION
4-9