Hello all,
I just dissembled K307, K308, K309, K310, K311 and K312 and measured the resistance between contact - contact, contact - coil and contact to shield. I used my older K616, a shielded box and a laboratory power supply set to 80V output voltage (=max output voltage). The output voltage was filtered with an RC network consisting of 1µF and 20K. The resulting current was measured when it was stable (took something between 5 min and 30 min), then the resistance was calculated.
all values in [Ohm]
Rel.: cont. - cont.; cont. - coil; cont. - shield
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K307: 5.33E+12; 2.00E+12; 2.00E+12;
K308: 1,00E+12; 444.44E+09; 320.00E+09;
K309: 53.33E+09; 800.00E+09; 3.64E+09;
K310: 3,20E+12; 1.00E+12; 800.00E+09;
K311: 11.43E+12; 4.00E+12; 4.00E+12;
K312: 3.20E+12; 533,33E+09; 400,00E+09;
Does somebody have an idea, how the different values of different relays could be explained? Coud it be that it depends on the number of cycles for each relay? the current ratings in this application is not that high I thing.
Kind regards
Guido
Edit: componet names for relays corrected