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Unidrive M Regen Design Guide 85
Issue Number: 4
Discharge resistors for SFF capacitors rated to 2 % THD
v
Figure 5-15 Discharge resistor arrangement
Cautions and warnings
In case of dents of more than 2 mm depth or any other mechanical damage, capacitors must not be used at all.
Care should be taken to ensure that there is still electrical clearance of 15 mm between terminations and other live or earthed parts above the
capacitor, in case of safety device activation. It is recommended that the capacitors are to be mounted vertically.
Discharging
Capacitors must be discharged to a maximum of 10 % of rated voltage before they are switched in again.
The capacitor must be discharged to 75 V or less within 3 minutes.
There must be not any switch, fuse or any other disconnecting device in the circuit between the power capacitor and the discharging device.
module
Three preformed
resistors
Discharge Resistor
Arrangements
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