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Connection
How to recognize a "defective" (ineffective) MPE protective conductor connection
11--12
PSU 5000 / PSG 3000
Instructions for Assembly and Operation
NOTE
U
V
PE
Test point
1.) Subject the protective conductor jumper (MPE) to a visual inspection for dam-
ages.
2.) Perform the following measurement with the protective conductor jumper
(MPE) installed!
-- Supply an AC current of approx. 10 A between the PE connection of the trans-
former and the negative pole of the rectifier/electrode gun.
-- The voltage measured between the PE connection and the test point (negative
pole) must not exceed 1 V (cf. EN 60204, Section 20.2 and Table 7).
If a voltage > 1 V is measured, the jumper (MPE) between the protective con-
!
ductor and the negative pole of the rectifier is defective (ineffective). This defect
may have been caused by circulating currents. There is danger of life.
Please note: The measurement described above may be performed analogously
to check the protective conductor connection to the transformer housing.
Transformer
Rectifier
MPE
Housing
max. 1 V
~
I
10 A
~ ~
+
Electrode gun
open
- -
Test point
1070 078 224- -109
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