Discharging Of Capacitors; Discharge The Capacitor - Siemens SIVACON Installation Manual

Mounting

3.6 Discharging of capacitors

3.6 Discharging of capacitors
3.6.1

Discharge the capacitor

Using discharge resistors
Discharge resistors are included in the delivery package, pre-mounted by the factory for
PhaseCap Premium, DeltaCap, PhaseCap Compact, PhaseCap Energy+ and PhiCap E-series .
PhaseCap Premium, PhaseCap Compact and PhaseCap Energy+ types with voltage from 600 V
onwards, all PhaseCap HD-types and PhaseCap Energy+ with terminal type F are provided with
external discharge module (see table 3-2).
Discharge resistors are required for discharging of capacitors to protect operating personal (risk
of electric shock hazard) and for re-switching capacitors in automatic PFC equipment (phase
opposition).
Siemens discharge resistors are designed to discharge capacitors down to 75 V or less within 180
seconds (some types within 90 seconds; please refer to the specific data sheet).
Make sure that the correct resistor is used for replacement, e.g. ohmic value and push-on
connector diameter.
Discharge the capacitor
Before re-switching, capacitors must be discharged to 10% of the rated voltage or below.
A discharge resistor can be easily replaced by pushing it onto the exposed top on the terminal.
Hazardous voltage.
Will cause death, serious personal injury, or equipment damage.
Discharge and short circuit the capacitor before handling.
18
DANGER
Installation and maintenance instructions for Power Factor Correction (PFC) capacitors
Installation Manual, 05/2022, L1V30884033A