3 CHECK OF GENERATOR MAINS SUPPLY PARTS
▪ Measure DC voltage at auxiliary contacts 41-42 of ENK2.
(Converter DC discharging contact, max voltage can be 750VDC.)
If 0V is measured:
– the contact is closed (and the converter DC is discharged within 1 minute)
or
– the contact is open and the converter DC is discharged and safe.
WARNING
In case one of the ENK2 main contacts is welded the converter DC discharge time is
much longer as the discharging auxiliary contact ENK2 41-42 cannot be closed.
600VDC discharge time to < 60VDC normally 40 seconds.
With open contact > 11 minutes to be < 60VDC.
▪ Check if any main contact of contactor ENK2 is welded:
Mechanical check: If snap-on auxiliary contacts or auxiliary contact block cannot be removed from the main
contactor at least one contact is welded.
ENK2 phase 1 1 - 2 contactor ENK2 2422 132 06621
phase 2 3 - 4 + 3 aux. contacts NO 2422 135 04355
phase 3 5 - 6 + 1 aux. contact NC 2422 135 04023
or
successor contactor 2422 132 07381
+ succ. aux. cont. block 2422 135 04464
+ succ. R/C circuit 2422 135 04661
▪ Record the conditions in the checklist (last pages).
▪ If contacts are found welded, replace contactor, its auxiliary contacts or contact block and the R/C circuit.
3.1 CONDITION(S) WHEN THE SERVICE COMES TO THE SITE
3.1.1 ENF2 tripped, possibly in combination with ENF1 and mains fuses
Problem might be caused by any of the:
– internal generator units (Optimus RAD + R/F)
or
– external units (Optimus RAD only) connected to breaker ENF2 :T1 :T2 :T3.
Solutions for such a case are not part of this document.
Converter test kit OPTIMUS for OPTIMUS 50/65/80 gen‐
erators release 3.x with converters 4512 104 7231x
8 CSIP Level 1 (08.0)
© 2008 Koninklijke Philips Electronics N.V.
ALL RIGHTS RESERVED
Conv test Optimus
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