Recent content by sn9434

  1. sn9434

    Why does relay insulation resistance change after power cycling?

    To berkeman: I'm terribly sorry but I'm not sure what you meant as "Do both sides of the questionable relay behave the same?". both sides meaning A-side and B-side? And yes, I would like to open it up to see what's going on. The unfortunate thing is, there is only one "defective" relay and 9...
  2. sn9434

    Why does relay insulation resistance change after power cycling?

    To berkeman: No, I didn’t buy them from eBay. Bought them from the franchises distributor. They are not brand new though, 5 are date code 1638 and another 5 is 1362. The 5Mohm one is date code 1638. They’ve never been used so I figuered that the risk of any insulation material degradation is...
  3. sn9434

    Why does relay insulation resistance change after power cycling?

    To Rive: No, I don't keep it in my hand. it's placed on a desk. To CWatters: Yes I agree that it's very high resistance and I was concerned about the accuracy of my reading. The issue is, I have 9/10 of these that ranges from 300Mohm - 500Mohm even after power up, and only one that resistance...
  4. sn9434

    Why does relay insulation resistance change after power cycling?

    I have Microsemi BR246-S0233. As is, the resistance between the X2 (GND) and signal line (e.g. A2) is OL. However, when I power it up (X1 = 25VDC), leave it for 5 minutes and power off, then straight away measure the resistance between X2 (GND) and the signal line A2, the resistance is now...