Maintenance Instructions
Seite/Page 106 - Kaptitel/Chapter 7: Maintenance Instructions
9.2.16
The capacitors can be checked using a multimeter with capacitor measuring.
The capacitors fitted inside the cabinet are discharged over the soldered resistor at every capacitor. The discharge
over the discharge reactor (see special tools) is security because the capacitor voltage is lethal.
Fig. 7.14.2-1: Discharge capacitor single phase
Discharge the capacitor - single phase
01. Discharge reactor (5-10kOhm)
02. Multimeter
03. Capacitor
Fig. 7.14.2-2: Discharge capacitor three phase
Discharge the capacitor - three phase
01. Discharge reactor (5-10kOhm)
02. Multimeter
03. Capacitor
At three phase capacitors the discharge must be made
between every phase (L1-L2; L2-L3; L1-L3)
Fig. 7.14.2-3: Capacitor checking
Checking
Switch the multimeter to capacitor measuring and connect
the meter end probes to the capacitor terminals. Measure
capacity of the capacitor.
Check all capacitors in the electrical cabinet
Test each capacitor by touching the multimeter (set on capacitor measuring) probes on the capacitor terminals:
measure the capacity of the capacitors.
The capacitors should not be removed from the electrical cabinet before the check is made.
03
02
01
03
02
01