cupoftea
Advanced Member level 5
Hi,
Regarding this 35A 277VAC power relay (12V coil)
https://www.panasonic-electric-works.com/cps/rde/xbcr/pew_eu_en/ds_hes_en.pdf
Is the best way to switch it on as follows…
a…Wait for mains zero crossing…
b…apply sudden step of 12V to the coil, so that current builds up as quickly as possible in the coil and reduces bouncing time as much as possible.
c….Wait x seconds, then reduce current to the holding current.
…or should the initial coil voltage applied be say 18V, in order to reduce bounce time even further? (and thence reduce the chance of contact welding?)
Is it worth waiting for the mains zero cross?....i mean, its going to bounce over the mains half cycle interval anyway?....(strange that the datasheet doesnt give the bounce time?)
Regarding this 35A 277VAC power relay (12V coil)
https://www.panasonic-electric-works.com/cps/rde/xbcr/pew_eu_en/ds_hes_en.pdf
Is the best way to switch it on as follows…
a…Wait for mains zero crossing…
b…apply sudden step of 12V to the coil, so that current builds up as quickly as possible in the coil and reduces bouncing time as much as possible.
c….Wait x seconds, then reduce current to the holding current.
…or should the initial coil voltage applied be say 18V, in order to reduce bounce time even further? (and thence reduce the chance of contact welding?)
Is it worth waiting for the mains zero cross?....i mean, its going to bounce over the mains half cycle interval anyway?....(strange that the datasheet doesnt give the bounce time?)
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