Protective Measures When Working On The Capacitor Bank - Siemens MOBILETT Plus Manual

General
S10
Fig. 1

Protective measures when working on the capacitor bank

Comply with the information given in this section, before opening the system.
DANGER
•
System OFF.
•
Disconnect the mains cable.
•
Remove the system upper cover.
•
Discharge the capacitor bank with S10 (D7) (Fig. 1).
•
Wait 5 minutes; then remove the left and right covers, and the cover with the cassette
compartment.
•
Measure the residual voltage at test points CAPPOS and CAPNEG on board D7 (Fig. 2).
The voltage measured must be less than10 V.
WARNING
Siemens-Elema AB
Solna, Sweden
Never work with the system open if the capacitor is charging or
has just been charged.
The capacitor bank may still be charged even if the system is
switched OFF and the mains cable is disconnected.
Life-threatening electric shock hazard exists.
Consult the information in this chapter.
If the voltage measured between CAPPOS and CAPNEG is 0V, the
measurement device could be defective or the wires between the
CAPPOS and CAPNEG test points on the capacitor bank could be
damaged.
The capacitors could still be charged.
In this case, proceed as follows:
Register 6 SPR8-215.850.02
Rev. 01
Fig. 2
Page 3 of 4
01.02 SPS-UD
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MOBILETT Plus/ Plus E