Re: Automated Level Crossings

Albert Alcoceba (alberta@zip.com.au)
21 Nov 1997 11:04:52 GMT

In the message about Automated Level Cros*****, from G.LAMBERT@UNSW.EDU.AU to ALL!, G.LAMBERT@UNSW.EDU.AU said:"

GG> My understanding is that, for low-voltage DC circuits, the short
^^^^^^^^^^^^^^^^

GG> circuit resistance that needs to exist to divert enough current from
GG> the holding relays to cause them to flip is one of very low impedance
^^^^^^^^^

Let's get it right...

impedance is to AC as resistance is to DC.

Regards,

Albert.

* RM 1.31 * Albert! alberta@zip.com.au http://www.zip.com.au/~alberta/